/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-03 20:03:32,698 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 20:03:32,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 20:03:32,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-03 20:03:32,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-03 20:03:32,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-03 20:03:32,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-03 20:03:32,802 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 [2022-03-03 20:03:32,823 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 20:03:32,823 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 20:03:32,823 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 20:03:32,823 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 20:03:32,824 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 20:03:32,824 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 20:03:32,824 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 20:03:32,824 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 20:03:32,824 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 20:03:32,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 20:03:32,824 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 20:03:32,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 20:03:32,825 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 20:03:32,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 20:03:32,825 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 20:03:32,825 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 20:03:32,825 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 20:03:32,825 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 20:03:32,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 20:03:32,825 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 20:03:32,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 20:03:32,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 20:03:32,825 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 20:03:32,826 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 20:03:32,826 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 20:03:32,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 20:03:32,826 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 20:03:32,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 20:03:32,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 20:03:32,826 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 20:03:32,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 20:03:32,826 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 20:03:32,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 20:03:32,826 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 20:03:32,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 20:03:32,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 20:03:32,973 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 20:03:32,974 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 20:03:32,975 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 20:03:32,976 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun.wvr.bpl [2022-03-03 20:03:32,976 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun.wvr.bpl' [2022-03-03 20:03:32,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 20:03:32,997 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 20:03:32,998 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 20:03:32,998 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 20:03:32,999 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 20:03:33,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:03:32" (1/1) ... [2022-03-03 20:03:33,011 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:03:32" (1/1) ... [2022-03-03 20:03:33,015 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 20:03:33,016 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 20:03:33,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 20:03:33,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 20:03:33,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 20:03:33,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:03:32" (1/1) ... [2022-03-03 20:03:33,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:03:32" (1/1) ... [2022-03-03 20:03:33,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:03:32" (1/1) ... [2022-03-03 20:03:33,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:03:32" (1/1) ... [2022-03-03 20:03:33,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:03:32" (1/1) ... [2022-03-03 20:03:33,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:03:32" (1/1) ... [2022-03-03 20:03:33,026 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:03:32" (1/1) ... [2022-03-03 20:03:33,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 20:03:33,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 20:03:33,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 20:03:33,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 20:03:33,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:03:32" (1/1) ... [2022-03-03 20:03:33,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 20:03:33,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:33,046 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) [2022-03-03 20:03:33,075 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 [2022-03-03 20:03:33,082 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 20:03:33,082 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 20:03:33,082 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 20:03:33,082 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-03 20:03:33,083 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-03 20:03:33,083 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-03 20:03:33,083 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 20:03:33,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 20:03:33,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 20:03:33,083 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-03 20:03:33,083 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-03 20:03:33,083 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-03 20:03:33,084 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-03 20:03:33,115 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 20:03:33,116 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 20:03:33,177 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 20:03:33,192 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 20:03:33,192 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-03 20:03:33,194 INFO L202 PluginConnector]: Adding new model min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 08:03:33 BoogieIcfgContainer [2022-03-03 20:03:33,194 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 20:03:33,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 20:03:33,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 20:03:33,200 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 20:03:33,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:03:32" (1/2) ... [2022-03-03 20:03:33,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38024b7a and model type min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 08:03:33, skipping insertion in model container [2022-03-03 20:03:33,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 08:03:33" (2/2) ... [2022-03-03 20:03:33,204 INFO L111 eAbstractionObserver]: Analyzing ICFG min-fun.wvr.bpl [2022-03-03 20:03:33,208 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 20:03:33,208 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 20:03:33,208 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 20:03:33,208 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 20:03:33,251 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-03 20:03:33,286 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 20:03:33,292 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, mLazyFiniteAutomaton=false, 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, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-03 20:03:33,292 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-03 20:03:33,300 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2022-03-03 20:03:33,335 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:33,337 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:33,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 20:03:33,353 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:33,354 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:33,354 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:33,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:33,357 INFO L85 PathProgramCache]: Analyzing trace with hash 541406590, now seen corresponding path program 1 times [2022-03-03 20:03:33,363 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:33,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740413079] [2022-03-03 20:03:33,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:33,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:33,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:33,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:33,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740413079] [2022-03-03 20:03:33,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740413079] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 20:03:33,484 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 20:03:33,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 20:03:33,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872236936] [2022-03-03 20:03:33,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 20:03:33,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 20:03:33,488 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:33,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 20:03:33,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 20:03:33,511 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:33,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:33,560 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2022-03-03 20:03:33,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 20:03:33,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 20:03:33,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:33,570 INFO L225 Difference]: With dead ends: 217 [2022-03-03 20:03:33,570 INFO L226 Difference]: Without dead ends: 202 [2022-03-03 20:03:33,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 20:03:33,574 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:33,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:03:33,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-03-03 20:03:33,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2022-03-03 20:03:33,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:33,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2022-03-03 20:03:33,680 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2022-03-03 20:03:33,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:33,681 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2022-03-03 20:03:33,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:33,681 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2022-03-03 20:03:33,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 20:03:33,684 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:33,684 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:33,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 20:03:33,699 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:33,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:33,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1033477442, now seen corresponding path program 1 times [2022-03-03 20:03:33,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:33,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734139252] [2022-03-03 20:03:33,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:33,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:33,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:33,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:03:33,757 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:33,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734139252] [2022-03-03 20:03:33,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734139252] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 20:03:33,758 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 20:03:33,758 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 20:03:33,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157434344] [2022-03-03 20:03:33,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 20:03:33,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 20:03:33,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:33,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 20:03:33,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 20:03:33,760 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:33,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:33,803 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2022-03-03 20:03:33,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 20:03:33,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 20:03:33,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:33,805 INFO L225 Difference]: With dead ends: 158 [2022-03-03 20:03:33,805 INFO L226 Difference]: Without dead ends: 158 [2022-03-03 20:03:33,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 20:03:33,806 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:33,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 15 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:03:33,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-03 20:03:33,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2022-03-03 20:03:33,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:33,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2022-03-03 20:03:33,819 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2022-03-03 20:03:33,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:33,819 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2022-03-03 20:03:33,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:33,819 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2022-03-03 20:03:33,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 20:03:33,820 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:33,820 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:33,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-03 20:03:33,820 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:33,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:33,821 INFO L85 PathProgramCache]: Analyzing trace with hash -324870244, now seen corresponding path program 1 times [2022-03-03 20:03:33,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:33,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975513672] [2022-03-03 20:03:33,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:33,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:33,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:03:33,874 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:33,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975513672] [2022-03-03 20:03:33,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975513672] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 20:03:33,874 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 20:03:33,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 20:03:33,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789640373] [2022-03-03 20:03:33,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 20:03:33,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 20:03:33,875 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:33,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 20:03:33,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-03 20:03:33,875 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:33,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:33,919 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2022-03-03 20:03:33,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 20:03:33,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 20:03:33,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:33,921 INFO L225 Difference]: With dead ends: 183 [2022-03-03 20:03:33,921 INFO L226 Difference]: Without dead ends: 183 [2022-03-03 20:03:33,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-03 20:03:33,922 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 77 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:33,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 13 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:03:33,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-03 20:03:33,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2022-03-03 20:03:33,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:33,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2022-03-03 20:03:33,932 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2022-03-03 20:03:33,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:33,932 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2022-03-03 20:03:33,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:33,932 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2022-03-03 20:03:33,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 20:03:33,933 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:33,933 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] [2022-03-03 20:03:33,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-03 20:03:33,934 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:33,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:33,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1959936804, now seen corresponding path program 1 times [2022-03-03 20:03:33,934 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:33,934 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729869198] [2022-03-03 20:03:33,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:33,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:34,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:34,206 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:34,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729869198] [2022-03-03 20:03:34,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729869198] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:34,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628676625] [2022-03-03 20:03:34,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:34,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:34,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:34,224 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) [2022-03-03 20:03:34,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-03 20:03:34,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:34,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 20:03:34,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:34,640 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 46 treesize of output 34 [2022-03-03 20:03:34,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:34,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:35,096 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:03:35,097 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 75 treesize of output 67 [2022-03-03 20:03:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:35,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628676625] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:35,491 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:35,491 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 20:03:35,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291266330] [2022-03-03 20:03:35,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:35,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 20:03:35,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:35,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 20:03:35,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-03-03 20:03:35,495 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:35,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:35,779 INFO L93 Difference]: Finished difference Result 366 states and 1043 transitions. [2022-03-03 20:03:35,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 20:03:35,780 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 20:03:35,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:35,785 INFO L225 Difference]: With dead ends: 366 [2022-03-03 20:03:35,785 INFO L226 Difference]: Without dead ends: 351 [2022-03-03 20:03:35,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:03:35,788 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 201 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:35,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 55 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:03:35,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-03-03 20:03:35,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 224. [2022-03-03 20:03:35,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:35,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2022-03-03 20:03:35,812 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2022-03-03 20:03:35,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:35,813 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2022-03-03 20:03:35,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:35,813 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2022-03-03 20:03:35,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 20:03:35,814 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:35,814 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] [2022-03-03 20:03:35,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-03 20:03:36,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:36,036 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:36,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:36,037 INFO L85 PathProgramCache]: Analyzing trace with hash -2127745896, now seen corresponding path program 2 times [2022-03-03 20:03:36,037 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:36,037 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430495856] [2022-03-03 20:03:36,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:36,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:36,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:36,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:36,287 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:36,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430495856] [2022-03-03 20:03:36,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430495856] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:36,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440548766] [2022-03-03 20:03:36,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:03:36,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:36,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:36,292 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) [2022-03-03 20:03:36,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-03 20:03:36,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:03:36,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:36,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 20:03:36,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:36,580 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:03:36,581 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 45 treesize of output 41 [2022-03-03 20:03:36,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:36,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:37,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:03:37,194 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 75 treesize of output 67 [2022-03-03 20:03:37,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:37,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440548766] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:37,460 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:37,460 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2022-03-03 20:03:37,460 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693687477] [2022-03-03 20:03:37,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:37,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 20:03:37,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:37,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 20:03:37,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-03-03 20:03:37,461 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:38,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:38,360 INFO L93 Difference]: Finished difference Result 478 states and 1385 transitions. [2022-03-03 20:03:38,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 20:03:38,364 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 20:03:38,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:38,366 INFO L225 Difference]: With dead ends: 478 [2022-03-03 20:03:38,366 INFO L226 Difference]: Without dead ends: 463 [2022-03-03 20:03:38,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=229, Invalid=763, Unknown=0, NotChecked=0, Total=992 [2022-03-03 20:03:38,367 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 286 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:38,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 125 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:03:38,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-03-03 20:03:38,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 229. [2022-03-03 20:03:38,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:38,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2022-03-03 20:03:38,374 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2022-03-03 20:03:38,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:38,374 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2022-03-03 20:03:38,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:38,374 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2022-03-03 20:03:38,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 20:03:38,375 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:38,376 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:38,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-03 20:03:38,591 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 [2022-03-03 20:03:38,592 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:38,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:38,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1828972448, now seen corresponding path program 3 times [2022-03-03 20:03:38,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:38,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485727015] [2022-03-03 20:03:38,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:38,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:38,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:38,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:38,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485727015] [2022-03-03 20:03:38,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485727015] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:38,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136404367] [2022-03-03 20:03:38,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:03:38,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:38,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:38,750 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) [2022-03-03 20:03:38,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-03 20:03:38,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 20:03:38,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:38,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 20:03:38,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:38,917 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 45 treesize of output 33 [2022-03-03 20:03:39,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:39,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:39,167 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:03:39,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 67 [2022-03-03 20:03:39,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:39,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136404367] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:39,466 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:39,466 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-03-03 20:03:39,466 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861704570] [2022-03-03 20:03:39,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:39,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:03:39,466 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:39,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:03:39,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:03:39,467 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:39,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:39,927 INFO L93 Difference]: Finished difference Result 433 states and 1240 transitions. [2022-03-03 20:03:39,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 20:03:39,927 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 20:03:39,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:39,929 INFO L225 Difference]: With dead ends: 433 [2022-03-03 20:03:39,929 INFO L226 Difference]: Without dead ends: 418 [2022-03-03 20:03:39,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:03:39,930 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 99 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:39,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 132 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:03:39,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-03-03 20:03:39,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 241. [2022-03-03 20:03:39,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:39,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2022-03-03 20:03:39,936 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2022-03-03 20:03:39,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:39,936 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2022-03-03 20:03:39,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:39,936 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2022-03-03 20:03:39,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 20:03:39,937 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:39,937 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] [2022-03-03 20:03:39,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-03 20:03:40,151 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 [2022-03-03 20:03:40,152 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:40,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:40,152 INFO L85 PathProgramCache]: Analyzing trace with hash -258146848, now seen corresponding path program 4 times [2022-03-03 20:03:40,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:40,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749892856] [2022-03-03 20:03:40,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:40,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:40,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:40,339 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:40,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749892856] [2022-03-03 20:03:40,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749892856] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:40,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117958637] [2022-03-03 20:03:40,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:03:40,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:40,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:40,340 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) [2022-03-03 20:03:40,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-03 20:03:40,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:03:40,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:40,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 20:03:40,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:40,561 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:03:40,562 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 45 treesize of output 41 [2022-03-03 20:03:40,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:40,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:40,978 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:03:40,978 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 73 treesize of output 67 [2022-03-03 20:03:41,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:41,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117958637] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:41,201 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:41,201 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 20:03:41,201 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797093761] [2022-03-03 20:03:41,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:41,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 20:03:41,201 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:41,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 20:03:41,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-03-03 20:03:41,219 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:41,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:41,497 INFO L93 Difference]: Finished difference Result 374 states and 1089 transitions. [2022-03-03 20:03:41,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 20:03:41,498 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 20:03:41,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:41,499 INFO L225 Difference]: With dead ends: 374 [2022-03-03 20:03:41,499 INFO L226 Difference]: Without dead ends: 359 [2022-03-03 20:03:41,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:03:41,500 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:41,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 118 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 278 Invalid, 0 Unknown, 7 Unchecked, 0.1s Time] [2022-03-03 20:03:41,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-03-03 20:03:41,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 245. [2022-03-03 20:03:41,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.9262295081967213) internal successors, (714), 244 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:41,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 714 transitions. [2022-03-03 20:03:41,506 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 714 transitions. Word has length 22 [2022-03-03 20:03:41,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:41,506 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 714 transitions. [2022-03-03 20:03:41,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:41,507 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 714 transitions. [2022-03-03 20:03:41,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 20:03:41,507 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:41,507 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:41,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-03 20:03:41,719 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 [2022-03-03 20:03:41,719 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:41,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:41,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1789401154, now seen corresponding path program 5 times [2022-03-03 20:03:41,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:41,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225333401] [2022-03-03 20:03:41,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:41,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:41,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:41,874 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:41,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225333401] [2022-03-03 20:03:41,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225333401] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:41,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868715853] [2022-03-03 20:03:41,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:03:41,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:41,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:41,876 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) [2022-03-03 20:03:41,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-03 20:03:41,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:03:41,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:41,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 20:03:41,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:42,111 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:03:42,111 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 45 treesize of output 41 [2022-03-03 20:03:42,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:42,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:42,453 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:03:42,453 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 73 treesize of output 67 [2022-03-03 20:03:42,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:42,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868715853] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:42,721 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:42,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-03-03 20:03:42,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318610246] [2022-03-03 20:03:42,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:42,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:03:42,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:42,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:03:42,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:03:42,722 INFO L87 Difference]: Start difference. First operand 245 states and 714 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:43,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:43,688 INFO L93 Difference]: Finished difference Result 659 states and 1889 transitions. [2022-03-03 20:03:43,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 20:03:43,688 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 20:03:43,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:43,691 INFO L225 Difference]: With dead ends: 659 [2022-03-03 20:03:43,691 INFO L226 Difference]: Without dead ends: 644 [2022-03-03 20:03:43,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2022-03-03 20:03:43,692 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 161 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:43,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 231 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:03:43,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2022-03-03 20:03:43,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 247. [2022-03-03 20:03:43,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:43,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2022-03-03 20:03:43,699 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2022-03-03 20:03:43,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:43,699 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2022-03-03 20:03:43,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:43,699 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2022-03-03 20:03:43,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 20:03:43,701 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:43,701 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] [2022-03-03 20:03:43,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-03 20:03:43,917 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 [2022-03-03 20:03:43,917 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:43,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:43,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1248888004, now seen corresponding path program 6 times [2022-03-03 20:03:43,918 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:43,918 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280489577] [2022-03-03 20:03:43,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:43,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:44,095 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:44,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280489577] [2022-03-03 20:03:44,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280489577] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:44,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67649827] [2022-03-03 20:03:44,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:03:44,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:44,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:44,096 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) [2022-03-03 20:03:44,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-03 20:03:44,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 20:03:44,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:44,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 20:03:44,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:44,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:03:44,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2022-03-03 20:03:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:44,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:44,609 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:03:44,609 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 73 treesize of output 67 [2022-03-03 20:03:44,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:44,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67649827] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:44,922 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:44,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-03-03 20:03:44,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916604424] [2022-03-03 20:03:44,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:44,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 20:03:44,923 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:44,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 20:03:44,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-03-03 20:03:44,923 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:45,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:45,945 INFO L93 Difference]: Finished difference Result 489 states and 1408 transitions. [2022-03-03 20:03:45,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 20:03:45,946 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 20:03:45,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:45,948 INFO L225 Difference]: With dead ends: 489 [2022-03-03 20:03:45,948 INFO L226 Difference]: Without dead ends: 474 [2022-03-03 20:03:45,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2022-03-03 20:03:45,949 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 136 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:45,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 224 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 605 Invalid, 0 Unknown, 38 Unchecked, 0.4s Time] [2022-03-03 20:03:45,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-03-03 20:03:45,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 247. [2022-03-03 20:03:45,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:45,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2022-03-03 20:03:45,960 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2022-03-03 20:03:45,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:45,960 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2022-03-03 20:03:45,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:45,960 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2022-03-03 20:03:45,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:45,961 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:45,961 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:45,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-03 20:03:46,179 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 [2022-03-03 20:03:46,179 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:46,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:46,180 INFO L85 PathProgramCache]: Analyzing trace with hash 976010682, now seen corresponding path program 7 times [2022-03-03 20:03:46,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:46,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836822257] [2022-03-03 20:03:46,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:46,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:46,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:46,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:46,226 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:46,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836822257] [2022-03-03 20:03:46,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836822257] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:46,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130786069] [2022-03-03 20:03:46,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:03:46,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:46,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:46,227 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) [2022-03-03 20:03:46,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-03 20:03:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:46,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:46,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:46,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:46,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:46,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:46,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130786069] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:46,437 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:46,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-03 20:03:46,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697662512] [2022-03-03 20:03:46,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:46,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 20:03:46,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:46,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 20:03:46,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:03:46,438 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:47,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:47,151 INFO L93 Difference]: Finished difference Result 1099 states and 3110 transitions. [2022-03-03 20:03:47,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 20:03:47,151 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:03:47,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:47,155 INFO L225 Difference]: With dead ends: 1099 [2022-03-03 20:03:47,155 INFO L226 Difference]: Without dead ends: 1099 [2022-03-03 20:03:47,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-03-03 20:03:47,156 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 277 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:47,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 202 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:03:47,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2022-03-03 20:03:47,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 311. [2022-03-03 20:03:47,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.141935483870968) internal successors, (974), 310 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:47,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 974 transitions. [2022-03-03 20:03:47,167 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 974 transitions. Word has length 24 [2022-03-03 20:03:47,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:47,167 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 974 transitions. [2022-03-03 20:03:47,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:47,167 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 974 transitions. [2022-03-03 20:03:47,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:47,168 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:47,168 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:47,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-03 20:03:47,382 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 [2022-03-03 20:03:47,382 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:47,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:47,383 INFO L85 PathProgramCache]: Analyzing trace with hash -308162, now seen corresponding path program 8 times [2022-03-03 20:03:47,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:47,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943070705] [2022-03-03 20:03:47,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:47,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:47,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:47,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:47,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:47,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943070705] [2022-03-03 20:03:47,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943070705] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:47,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562564923] [2022-03-03 20:03:47,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:03:47,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:47,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:47,451 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) [2022-03-03 20:03:47,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-03 20:03:47,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:03:47,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:47,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:47,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:47,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:47,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:47,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562564923] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:47,691 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:47,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 20:03:47,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396221153] [2022-03-03 20:03:47,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:47,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:03:47,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:47,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:03:47,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:03:47,692 INFO L87 Difference]: Start difference. First operand 311 states and 974 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:49,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:49,338 INFO L93 Difference]: Finished difference Result 1794 states and 5013 transitions. [2022-03-03 20:03:49,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-03 20:03:49,338 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:03:49,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:49,347 INFO L225 Difference]: With dead ends: 1794 [2022-03-03 20:03:49,347 INFO L226 Difference]: Without dead ends: 1794 [2022-03-03 20:03:49,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4272 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2378, Invalid=8752, Unknown=0, NotChecked=0, Total=11130 [2022-03-03 20:03:49,350 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 460 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:49,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 303 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1148 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:03:49,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2022-03-03 20:03:49,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 315. [2022-03-03 20:03:49,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.1656050955414012) internal successors, (994), 314 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:49,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 994 transitions. [2022-03-03 20:03:49,363 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 994 transitions. Word has length 24 [2022-03-03 20:03:49,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:49,363 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 994 transitions. [2022-03-03 20:03:49,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:49,364 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 994 transitions. [2022-03-03 20:03:49,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:49,365 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:49,365 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:49,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-03 20:03:49,581 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 [2022-03-03 20:03:49,581 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:49,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:49,582 INFO L85 PathProgramCache]: Analyzing trace with hash 566643918, now seen corresponding path program 9 times [2022-03-03 20:03:49,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:49,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972446974] [2022-03-03 20:03:49,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:49,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:49,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:49,623 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:49,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972446974] [2022-03-03 20:03:49,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972446974] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:49,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158967305] [2022-03-03 20:03:49,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:03:49,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:49,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:49,633 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) [2022-03-03 20:03:49,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-03 20:03:49,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:03:49,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:49,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:49,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:49,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:49,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:49,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:49,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158967305] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:49,824 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:49,824 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 20:03:49,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269353092] [2022-03-03 20:03:49,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:49,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:03:49,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:49,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:03:49,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:03:49,825 INFO L87 Difference]: Start difference. First operand 315 states and 994 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:50,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:50,744 INFO L93 Difference]: Finished difference Result 1470 states and 4126 transitions. [2022-03-03 20:03:50,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 20:03:50,744 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:03:50,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:50,749 INFO L225 Difference]: With dead ends: 1470 [2022-03-03 20:03:50,749 INFO L226 Difference]: Without dead ends: 1470 [2022-03-03 20:03:50,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1095, Invalid=3327, Unknown=0, NotChecked=0, Total=4422 [2022-03-03 20:03:50,750 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 338 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:50,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 252 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 20:03:50,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-03-03 20:03:50,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 306. [2022-03-03 20:03:50,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1475409836065573) internal successors, (960), 305 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:50,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 960 transitions. [2022-03-03 20:03:50,761 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 960 transitions. Word has length 24 [2022-03-03 20:03:50,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:50,761 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 960 transitions. [2022-03-03 20:03:50,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:50,761 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 960 transitions. [2022-03-03 20:03:50,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:50,762 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:50,762 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:50,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-03 20:03:50,977 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 [2022-03-03 20:03:50,978 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:50,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:50,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1502782590, now seen corresponding path program 1 times [2022-03-03 20:03:50,978 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:50,978 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822329868] [2022-03-03 20:03:50,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:50,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:50,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:03:51,020 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:51,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822329868] [2022-03-03 20:03:51,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822329868] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:51,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973362340] [2022-03-03 20:03:51,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:51,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:51,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:51,027 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) [2022-03-03 20:03:51,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-03 20:03:51,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:51,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 20:03:51,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:03:51,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:03:51,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973362340] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:51,192 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:51,192 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-03 20:03:51,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152589835] [2022-03-03 20:03:51,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:51,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 20:03:51,193 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:51,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 20:03:51,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-03-03 20:03:51,193 INFO L87 Difference]: Start difference. First operand 306 states and 960 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2022-03-03 20:03:51,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:51,293 INFO L93 Difference]: Finished difference Result 685 states and 2024 transitions. [2022-03-03 20:03:51,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 20:03:51,294 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 24 [2022-03-03 20:03:51,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:51,296 INFO L225 Difference]: With dead ends: 685 [2022-03-03 20:03:51,296 INFO L226 Difference]: Without dead ends: 679 [2022-03-03 20:03:51,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:03:51,298 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 147 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:51,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 42 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:03:51,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-03-03 20:03:51,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 429. [2022-03-03 20:03:51,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.2406542056074765) internal successors, (1387), 428 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:51,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1387 transitions. [2022-03-03 20:03:51,307 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1387 transitions. Word has length 24 [2022-03-03 20:03:51,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:51,307 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1387 transitions. [2022-03-03 20:03:51,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2022-03-03 20:03:51,307 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1387 transitions. [2022-03-03 20:03:51,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:51,308 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:51,308 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:51,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-03 20:03:51,522 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 [2022-03-03 20:03:51,523 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:51,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:51,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1065813882, now seen corresponding path program 10 times [2022-03-03 20:03:51,523 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:51,523 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941660906] [2022-03-03 20:03:51,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:51,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:51,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:51,554 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:51,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941660906] [2022-03-03 20:03:51,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941660906] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:51,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713791039] [2022-03-03 20:03:51,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:03:51,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:51,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:51,572 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) [2022-03-03 20:03:51,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-03 20:03:51,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:03:51,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:51,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:51,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:51,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:51,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:51,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713791039] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:51,764 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:51,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-03 20:03:51,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190561377] [2022-03-03 20:03:51,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:51,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 20:03:51,765 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:51,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 20:03:51,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:03:51,765 INFO L87 Difference]: Start difference. First operand 429 states and 1387 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) [2022-03-03 20:03:52,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:52,110 INFO L93 Difference]: Finished difference Result 1159 states and 3490 transitions. [2022-03-03 20:03:52,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 20:03:52,111 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 24 [2022-03-03 20:03:52,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:52,116 INFO L225 Difference]: With dead ends: 1159 [2022-03-03 20:03:52,116 INFO L226 Difference]: Without dead ends: 1111 [2022-03-03 20:03:52,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-03-03 20:03:52,117 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 276 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:52,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 103 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:03:52,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-03-03 20:03:52,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 639. [2022-03-03 20:03:52,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.3448275862068964) internal successors, (2134), 638 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:52,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2134 transitions. [2022-03-03 20:03:52,137 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2134 transitions. Word has length 24 [2022-03-03 20:03:52,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:52,137 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 2134 transitions. [2022-03-03 20:03:52,137 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) [2022-03-03 20:03:52,137 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2134 transitions. [2022-03-03 20:03:52,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:52,139 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:52,139 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:52,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-03 20:03:52,361 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 [2022-03-03 20:03:52,361 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:52,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:52,361 INFO L85 PathProgramCache]: Analyzing trace with hash 359856550, now seen corresponding path program 2 times [2022-03-03 20:03:52,361 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:52,361 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010656564] [2022-03-03 20:03:52,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:52,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:52,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:52,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:03:52,391 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:52,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010656564] [2022-03-03 20:03:52,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010656564] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:52,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507370150] [2022-03-03 20:03:52,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:03:52,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:52,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:52,393 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) [2022-03-03 20:03:52,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-03 20:03:52,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:03:52,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:52,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 20:03:52,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:03:52,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:52,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:03:52,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507370150] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:52,557 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:52,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-03 20:03:52,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67258438] [2022-03-03 20:03:52,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:52,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 20:03:52,557 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:52,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 20:03:52,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-03 20:03:52,558 INFO L87 Difference]: Start difference. First operand 639 states and 2134 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2022-03-03 20:03:52,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:52,753 INFO L93 Difference]: Finished difference Result 1267 states and 3847 transitions. [2022-03-03 20:03:52,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 20:03:52,754 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 24 [2022-03-03 20:03:52,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:52,758 INFO L225 Difference]: With dead ends: 1267 [2022-03-03 20:03:52,758 INFO L226 Difference]: Without dead ends: 1267 [2022-03-03 20:03:52,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-03-03 20:03:52,759 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 183 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:52,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 78 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:03:52,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-03-03 20:03:52,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 683. [2022-03-03 20:03:52,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 3.3167155425219943) internal successors, (2262), 682 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:52,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2262 transitions. [2022-03-03 20:03:52,774 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2262 transitions. Word has length 24 [2022-03-03 20:03:52,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:52,774 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 2262 transitions. [2022-03-03 20:03:52,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2022-03-03 20:03:52,774 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2262 transitions. [2022-03-03 20:03:52,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:52,775 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:52,776 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:52,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-03 20:03:52,992 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 [2022-03-03 20:03:52,992 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:52,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:52,993 INFO L85 PathProgramCache]: Analyzing trace with hash -986825016, now seen corresponding path program 11 times [2022-03-03 20:03:52,993 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:52,993 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074684942] [2022-03-03 20:03:52,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:52,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:52,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:53,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:53,034 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:53,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074684942] [2022-03-03 20:03:53,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074684942] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:53,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879573142] [2022-03-03 20:03:53,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:03:53,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:53,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:53,035 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) [2022-03-03 20:03:53,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-03 20:03:53,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:03:53,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:53,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:53,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:53,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:53,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:53,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:53,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879573142] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:53,211 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:53,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 20:03:53,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057886887] [2022-03-03 20:03:53,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:53,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 20:03:53,211 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:53,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 20:03:53,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:03:53,212 INFO L87 Difference]: Start difference. First operand 683 states and 2262 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:53,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:53,679 INFO L93 Difference]: Finished difference Result 2268 states and 6749 transitions. [2022-03-03 20:03:53,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-03 20:03:53,680 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:03:53,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:53,688 INFO L225 Difference]: With dead ends: 2268 [2022-03-03 20:03:53,688 INFO L226 Difference]: Without dead ends: 2268 [2022-03-03 20:03:53,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 20:03:53,691 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 259 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:53,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 150 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:03:53,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2022-03-03 20:03:53,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 699. [2022-03-03 20:03:53,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 3.312320916905444) internal successors, (2312), 698 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:53,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2312 transitions. [2022-03-03 20:03:53,719 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2312 transitions. Word has length 24 [2022-03-03 20:03:53,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:53,719 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2312 transitions. [2022-03-03 20:03:53,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:53,719 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2312 transitions. [2022-03-03 20:03:53,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:53,720 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:53,720 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:53,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-03 20:03:53,935 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 [2022-03-03 20:03:53,935 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:53,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:53,936 INFO L85 PathProgramCache]: Analyzing trace with hash -201910922, now seen corresponding path program 12 times [2022-03-03 20:03:53,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:53,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319540170] [2022-03-03 20:03:53,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:53,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:53,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:53,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:53,977 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:53,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319540170] [2022-03-03 20:03:53,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319540170] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:53,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481776675] [2022-03-03 20:03:53,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:03:53,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:53,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:53,992 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) [2022-03-03 20:03:54,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 20:03:54,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:54,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:54,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:54,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-03 20:03:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:54,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:54,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481776675] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:54,174 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:54,174 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 20:03:54,175 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391732582] [2022-03-03 20:03:54,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:54,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 20:03:54,175 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:54,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 20:03:54,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:03:54,175 INFO L87 Difference]: Start difference. First operand 699 states and 2312 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:54,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:54,715 INFO L93 Difference]: Finished difference Result 2256 states and 6789 transitions. [2022-03-03 20:03:54,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 20:03:54,715 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:03:54,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:54,723 INFO L225 Difference]: With dead ends: 2256 [2022-03-03 20:03:54,723 INFO L226 Difference]: Without dead ends: 2256 [2022-03-03 20:03:54,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 20:03:54,725 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 300 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:54,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 141 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:03:54,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-03-03 20:03:54,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 775. [2022-03-03 20:03:54,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.289405684754522) internal successors, (2546), 774 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:54,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2546 transitions. [2022-03-03 20:03:54,763 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2546 transitions. Word has length 24 [2022-03-03 20:03:54,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:54,763 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2546 transitions. [2022-03-03 20:03:54,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:54,764 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2546 transitions. [2022-03-03 20:03:54,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:54,766 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:54,766 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:54,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-03 20:03:54,998 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 [2022-03-03 20:03:54,998 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:54,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:54,999 INFO L85 PathProgramCache]: Analyzing trace with hash 186144540, now seen corresponding path program 13 times [2022-03-03 20:03:54,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:54,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010370498] [2022-03-03 20:03:54,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:54,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:55,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:55,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:55,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:55,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010370498] [2022-03-03 20:03:55,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010370498] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:55,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429357275] [2022-03-03 20:03:55,046 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:03:55,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:55,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:55,047 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) [2022-03-03 20:03:55,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-03 20:03:55,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:55,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:55,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:55,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:55,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:55,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:55,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429357275] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:55,199 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:55,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-03-03 20:03:55,200 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354064187] [2022-03-03 20:03:55,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:55,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 20:03:55,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:55,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 20:03:55,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-03 20:03:55,200 INFO L87 Difference]: Start difference. First operand 775 states and 2546 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:55,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:55,450 INFO L93 Difference]: Finished difference Result 1611 states and 5005 transitions. [2022-03-03 20:03:55,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 20:03:55,450 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:03:55,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:55,455 INFO L225 Difference]: With dead ends: 1611 [2022-03-03 20:03:55,456 INFO L226 Difference]: Without dead ends: 1611 [2022-03-03 20:03:55,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:03:55,456 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 258 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:55,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 104 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:03:55,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-03-03 20:03:55,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 926. [2022-03-03 20:03:55,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.370810810810811) internal successors, (3118), 925 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:55,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3118 transitions. [2022-03-03 20:03:55,473 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3118 transitions. Word has length 24 [2022-03-03 20:03:55,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:55,473 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 3118 transitions. [2022-03-03 20:03:55,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:55,474 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3118 transitions. [2022-03-03 20:03:55,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:55,475 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:55,475 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:55,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-03 20:03:55,691 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 [2022-03-03 20:03:55,691 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:55,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:55,692 INFO L85 PathProgramCache]: Analyzing trace with hash -246732064, now seen corresponding path program 14 times [2022-03-03 20:03:55,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:55,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248372491] [2022-03-03 20:03:55,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:55,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:55,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:55,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:55,730 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:55,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248372491] [2022-03-03 20:03:55,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248372491] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:55,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855900188] [2022-03-03 20:03:55,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:03:55,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:55,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:55,731 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) [2022-03-03 20:03:55,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-03 20:03:55,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:03:55,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:55,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:55,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:55,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:55,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:55,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:55,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855900188] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:55,879 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:55,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 20:03:55,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730587668] [2022-03-03 20:03:55,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:55,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 20:03:55,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:55,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 20:03:55,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:03:55,880 INFO L87 Difference]: Start difference. First operand 926 states and 3118 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:56,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:56,329 INFO L93 Difference]: Finished difference Result 2408 states and 7521 transitions. [2022-03-03 20:03:56,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 20:03:56,329 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:03:56,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:56,338 INFO L225 Difference]: With dead ends: 2408 [2022-03-03 20:03:56,339 INFO L226 Difference]: Without dead ends: 2404 [2022-03-03 20:03:56,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 20:03:56,340 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 271 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:56,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 151 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:03:56,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2022-03-03 20:03:56,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 934. [2022-03-03 20:03:56,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.356913183279743) internal successors, (3132), 933 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:56,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3132 transitions. [2022-03-03 20:03:56,377 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3132 transitions. Word has length 24 [2022-03-03 20:03:56,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:56,378 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 3132 transitions. [2022-03-03 20:03:56,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:56,378 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3132 transitions. [2022-03-03 20:03:56,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:56,379 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:56,380 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:56,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-03 20:03:56,596 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 [2022-03-03 20:03:56,596 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:56,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:56,596 INFO L85 PathProgramCache]: Analyzing trace with hash -112101728, now seen corresponding path program 15 times [2022-03-03 20:03:56,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:56,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64494778] [2022-03-03 20:03:56,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:56,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:56,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:56,642 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:56,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64494778] [2022-03-03 20:03:56,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64494778] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:56,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836488742] [2022-03-03 20:03:56,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:03:56,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:56,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:56,643 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) [2022-03-03 20:03:56,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-03 20:03:56,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 20:03:56,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:56,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:56,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:56,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:56,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:56,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:56,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836488742] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:56,818 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:56,818 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 20:03:56,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370628284] [2022-03-03 20:03:56,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:56,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:03:56,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:56,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:03:56,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:03:56,818 INFO L87 Difference]: Start difference. First operand 934 states and 3132 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-03-03 20:03:57,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:57,667 INFO L93 Difference]: Finished difference Result 3509 states and 10311 transitions. [2022-03-03 20:03:57,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-03 20:03:57,668 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 24 [2022-03-03 20:03:57,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:57,681 INFO L225 Difference]: With dead ends: 3509 [2022-03-03 20:03:57,681 INFO L226 Difference]: Without dead ends: 3509 [2022-03-03 20:03:57,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2022-03-03 20:03:57,684 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 408 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:57,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 270 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 20:03:57,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2022-03-03 20:03:57,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 985. [2022-03-03 20:03:57,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.399390243902439) internal successors, (3345), 984 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:57,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3345 transitions. [2022-03-03 20:03:57,740 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3345 transitions. Word has length 24 [2022-03-03 20:03:57,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:57,740 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3345 transitions. [2022-03-03 20:03:57,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-03-03 20:03:57,740 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3345 transitions. [2022-03-03 20:03:57,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:57,745 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:57,745 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:57,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-03 20:03:57,961 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 [2022-03-03 20:03:57,961 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:57,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:57,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1530937426, now seen corresponding path program 16 times [2022-03-03 20:03:57,962 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:57,962 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777379198] [2022-03-03 20:03:57,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:57,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:57,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:57,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:57,996 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:57,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777379198] [2022-03-03 20:03:57,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777379198] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:57,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760824047] [2022-03-03 20:03:57,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:03:57,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:57,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:57,997 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) [2022-03-03 20:03:57,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-03 20:03:58,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:03:58,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:58,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:03:58,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:58,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:58,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:03:58,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760824047] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:58,157 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:58,157 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 20:03:58,157 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425115099] [2022-03-03 20:03:58,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:58,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:03:58,157 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:58,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:03:58,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:03:58,158 INFO L87 Difference]: Start difference. First operand 985 states and 3345 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-03-03 20:03:59,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:59,211 INFO L93 Difference]: Finished difference Result 3211 states and 9686 transitions. [2022-03-03 20:03:59,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-03 20:03:59,211 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 24 [2022-03-03 20:03:59,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:59,220 INFO L225 Difference]: With dead ends: 3211 [2022-03-03 20:03:59,220 INFO L226 Difference]: Without dead ends: 3207 [2022-03-03 20:03:59,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2022-03-03 20:03:59,223 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 473 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:59,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 262 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 20:03:59,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2022-03-03 20:03:59,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 985. [2022-03-03 20:03:59,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.397357723577236) internal successors, (3343), 984 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:59,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3343 transitions. [2022-03-03 20:03:59,275 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3343 transitions. Word has length 24 [2022-03-03 20:03:59,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:59,275 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3343 transitions. [2022-03-03 20:03:59,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-03-03 20:03:59,276 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3343 transitions. [2022-03-03 20:03:59,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:59,278 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:59,279 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:59,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-03 20:03:59,491 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 [2022-03-03 20:03:59,492 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:59,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:59,492 INFO L85 PathProgramCache]: Analyzing trace with hash 618651874, now seen corresponding path program 3 times [2022-03-03 20:03:59,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:59,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397607724] [2022-03-03 20:03:59,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:59,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:03:59,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:03:59,525 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:03:59,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397607724] [2022-03-03 20:03:59,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397607724] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:03:59,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499623845] [2022-03-03 20:03:59,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:03:59,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:03:59,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:03:59,527 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) [2022-03-03 20:03:59,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-03 20:03:59,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 20:03:59,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:03:59,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 20:03:59,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:03:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:03:59,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:03:59,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:03:59,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499623845] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:03:59,658 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:03:59,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-03-03 20:03:59,658 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922631207] [2022-03-03 20:03:59,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:03:59,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 20:03:59,659 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:03:59,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 20:03:59,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-03 20:03:59,659 INFO L87 Difference]: Start difference. First operand 985 states and 3343 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:59,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:03:59,751 INFO L93 Difference]: Finished difference Result 1333 states and 4297 transitions. [2022-03-03 20:03:59,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 20:03:59,751 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:03:59,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:03:59,754 INFO L225 Difference]: With dead ends: 1333 [2022-03-03 20:03:59,754 INFO L226 Difference]: Without dead ends: 1333 [2022-03-03 20:03:59,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:03:59,754 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 92 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:03:59,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 66 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:03:59,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-03-03 20:03:59,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 937. [2022-03-03 20:03:59,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.378205128205128) internal successors, (3162), 936 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:59,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3162 transitions. [2022-03-03 20:03:59,771 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3162 transitions. Word has length 24 [2022-03-03 20:03:59,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:03:59,771 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 3162 transitions. [2022-03-03 20:03:59,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:03:59,771 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3162 transitions. [2022-03-03 20:03:59,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:03:59,773 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:03:59,773 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:03:59,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-03 20:03:59,989 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 [2022-03-03 20:03:59,989 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:03:59,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:03:59,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1548851618, now seen corresponding path program 17 times [2022-03-03 20:03:59,990 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:03:59,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741220881] [2022-03-03 20:03:59,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:03:59,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:03:59,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:00,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:00,017 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:00,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741220881] [2022-03-03 20:04:00,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741220881] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:00,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83883410] [2022-03-03 20:04:00,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:04:00,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:00,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:00,018 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) [2022-03-03 20:04:00,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-03 20:04:00,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:04:00,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:00,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:04:00,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:00,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:00,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:00,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83883410] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:00,126 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:00,126 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-03 20:04:00,128 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332659709] [2022-03-03 20:04:00,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:00,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 20:04:00,128 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:00,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 20:04:00,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-03 20:04:00,129 INFO L87 Difference]: Start difference. First operand 937 states and 3162 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:00,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:00,356 INFO L93 Difference]: Finished difference Result 2129 states and 6669 transitions. [2022-03-03 20:04:00,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 20:04:00,356 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:04:00,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:00,376 INFO L225 Difference]: With dead ends: 2129 [2022-03-03 20:04:00,376 INFO L226 Difference]: Without dead ends: 2129 [2022-03-03 20:04:00,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 20:04:00,377 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 171 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:00,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 143 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:04:00,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-03-03 20:04:00,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1003. [2022-03-03 20:04:00,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 3.3642714570858283) internal successors, (3371), 1002 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:00,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 3371 transitions. [2022-03-03 20:04:00,437 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 3371 transitions. Word has length 24 [2022-03-03 20:04:00,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:00,437 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 3371 transitions. [2022-03-03 20:04:00,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:00,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 3371 transitions. [2022-03-03 20:04:00,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:04:00,439 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:00,439 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:04:00,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-03 20:04:00,639 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 [2022-03-03 20:04:00,640 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:00,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:00,640 INFO L85 PathProgramCache]: Analyzing trace with hash -843436226, now seen corresponding path program 18 times [2022-03-03 20:04:00,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:00,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360435186] [2022-03-03 20:04:00,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:00,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:00,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:00,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:00,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360435186] [2022-03-03 20:04:00,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360435186] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:00,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082014745] [2022-03-03 20:04:00,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:04:00,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:00,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:00,666 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) [2022-03-03 20:04:00,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-03 20:04:00,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:04:00,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:00,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:04:00,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:00,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:00,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:00,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082014745] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:00,762 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:00,762 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-03 20:04:00,762 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937433170] [2022-03-03 20:04:00,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:00,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 20:04:00,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:00,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 20:04:00,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-03 20:04:00,768 INFO L87 Difference]: Start difference. First operand 1003 states and 3371 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:01,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:01,015 INFO L93 Difference]: Finished difference Result 2262 states and 7067 transitions. [2022-03-03 20:04:01,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 20:04:01,015 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:04:01,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:01,048 INFO L225 Difference]: With dead ends: 2262 [2022-03-03 20:04:01,048 INFO L226 Difference]: Without dead ends: 2262 [2022-03-03 20:04:01,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 20:04:01,049 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 164 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:01,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 138 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:04:01,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-03-03 20:04:01,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1073. [2022-03-03 20:04:01,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.3563432835820897) internal successors, (3598), 1072 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:01,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3598 transitions. [2022-03-03 20:04:01,130 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3598 transitions. Word has length 24 [2022-03-03 20:04:01,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:01,130 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 3598 transitions. [2022-03-03 20:04:01,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:01,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3598 transitions. [2022-03-03 20:04:01,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:04:01,132 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:01,132 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:04:01,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-03 20:04:01,332 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 [2022-03-03 20:04:01,333 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:01,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:01,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1926458882, now seen corresponding path program 19 times [2022-03-03 20:04:01,333 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:01,333 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061327695] [2022-03-03 20:04:01,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:01,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:01,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:01,369 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:01,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061327695] [2022-03-03 20:04:01,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061327695] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:01,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736988035] [2022-03-03 20:04:01,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:04:01,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:01,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:01,371 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) [2022-03-03 20:04:01,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-03 20:04:01,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:01,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:04:01,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:01,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:01,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:04:01,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736988035] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:01,547 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:01,547 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-03-03 20:04:01,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527383735] [2022-03-03 20:04:01,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:01,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 20:04:01,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:01,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 20:04:01,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:04:01,548 INFO L87 Difference]: Start difference. First operand 1073 states and 3598 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:01,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:01,825 INFO L93 Difference]: Finished difference Result 1474 states and 4766 transitions. [2022-03-03 20:04:01,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 20:04:01,826 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:04:01,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:01,829 INFO L225 Difference]: With dead ends: 1474 [2022-03-03 20:04:01,829 INFO L226 Difference]: Without dead ends: 1464 [2022-03-03 20:04:01,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:04:01,831 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 156 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:01,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 133 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:04:01,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-03-03 20:04:01,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1140. [2022-03-03 20:04:01,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.395961369622476) internal successors, (3868), 1139 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:01,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3868 transitions. [2022-03-03 20:04:01,851 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3868 transitions. Word has length 24 [2022-03-03 20:04:01,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:01,851 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3868 transitions. [2022-03-03 20:04:01,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:01,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3868 transitions. [2022-03-03 20:04:01,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:04:01,853 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:01,853 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:04:01,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-03 20:04:02,069 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 [2022-03-03 20:04:02,070 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:02,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:02,070 INFO L85 PathProgramCache]: Analyzing trace with hash -888257368, now seen corresponding path program 20 times [2022-03-03 20:04:02,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:02,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608301737] [2022-03-03 20:04:02,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:02,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:02,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:04:02,105 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:02,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608301737] [2022-03-03 20:04:02,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608301737] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:02,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924519973] [2022-03-03 20:04:02,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:04:02,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:02,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:02,107 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) [2022-03-03 20:04:02,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-03 20:04:02,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:04:02,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:02,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:04:02,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:02,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:04:02,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:04:02,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924519973] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:02,230 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:02,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-03 20:04:02,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688340558] [2022-03-03 20:04:02,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:02,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 20:04:02,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:02,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 20:04:02,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-03 20:04:02,231 INFO L87 Difference]: Start difference. First operand 1140 states and 3868 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:02,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:02,449 INFO L93 Difference]: Finished difference Result 2318 states and 7414 transitions. [2022-03-03 20:04:02,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-03 20:04:02,449 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:04:02,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:02,453 INFO L225 Difference]: With dead ends: 2318 [2022-03-03 20:04:02,453 INFO L226 Difference]: Without dead ends: 2314 [2022-03-03 20:04:02,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:04:02,454 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 219 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:02,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 90 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:04:02,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-03-03 20:04:02,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1140. [2022-03-03 20:04:02,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.394205443371378) internal successors, (3866), 1139 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:02,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3866 transitions. [2022-03-03 20:04:02,477 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3866 transitions. Word has length 24 [2022-03-03 20:04:02,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:02,477 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3866 transitions. [2022-03-03 20:04:02,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:02,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3866 transitions. [2022-03-03 20:04:02,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:04:02,479 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:02,479 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:04:02,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-03 20:04:02,694 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 [2022-03-03 20:04:02,695 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:02,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:02,695 INFO L85 PathProgramCache]: Analyzing trace with hash -290920710, now seen corresponding path program 21 times [2022-03-03 20:04:02,695 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:02,695 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369467740] [2022-03-03 20:04:02,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:02,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:02,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:02,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:02,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369467740] [2022-03-03 20:04:02,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369467740] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:02,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56735753] [2022-03-03 20:04:02,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:04:02,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:02,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:02,730 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) [2022-03-03 20:04:02,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-03 20:04:02,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:04:02,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:02,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:04:02,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:02,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:02,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:02,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:02,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56735753] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:02,830 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:02,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-03 20:04:02,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114367767] [2022-03-03 20:04:02,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:02,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 20:04:02,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:02,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 20:04:02,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-03 20:04:02,831 INFO L87 Difference]: Start difference. First operand 1140 states and 3866 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:03,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:03,033 INFO L93 Difference]: Finished difference Result 2302 states and 7376 transitions. [2022-03-03 20:04:03,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 20:04:03,033 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:04:03,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:03,037 INFO L225 Difference]: With dead ends: 2302 [2022-03-03 20:04:03,037 INFO L226 Difference]: Without dead ends: 2290 [2022-03-03 20:04:03,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-03-03 20:04:03,038 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 236 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:03,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 133 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:04:03,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2022-03-03 20:04:03,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1148. [2022-03-03 20:04:03,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 3.3844812554489976) internal successors, (3882), 1147 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:03,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 3882 transitions. [2022-03-03 20:04:03,088 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 3882 transitions. Word has length 24 [2022-03-03 20:04:03,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:03,088 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 3882 transitions. [2022-03-03 20:04:03,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:03,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 3882 transitions. [2022-03-03 20:04:03,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:04:03,090 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:03,090 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:04:03,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-03 20:04:03,303 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 [2022-03-03 20:04:03,303 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:03,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:03,304 INFO L85 PathProgramCache]: Analyzing trace with hash -817340994, now seen corresponding path program 22 times [2022-03-03 20:04:03,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:03,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994239208] [2022-03-03 20:04:03,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:03,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:03,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:03,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:03,334 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:03,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994239208] [2022-03-03 20:04:03,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994239208] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:03,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601372238] [2022-03-03 20:04:03,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:04:03,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:03,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:03,336 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) [2022-03-03 20:04:03,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-03 20:04:03,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:04:03,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:03,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:04:03,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:03,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:03,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:03,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:04:03,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601372238] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:03,464 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:03,464 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 20:04:03,464 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397047667] [2022-03-03 20:04:03,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:03,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:04:03,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:03,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:04:03,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:04:03,465 INFO L87 Difference]: Start difference. First operand 1148 states and 3882 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:04,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:04,116 INFO L93 Difference]: Finished difference Result 4760 states and 15112 transitions. [2022-03-03 20:04:04,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 20:04:04,116 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:04:04,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:04,128 INFO L225 Difference]: With dead ends: 4760 [2022-03-03 20:04:04,128 INFO L226 Difference]: Without dead ends: 4760 [2022-03-03 20:04:04,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=926, Invalid=2734, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 20:04:04,129 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 435 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:04,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 202 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:04:04,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2022-03-03 20:04:04,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 1429. [2022-03-03 20:04:04,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.589635854341737) internal successors, (5126), 1428 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:04,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 5126 transitions. [2022-03-03 20:04:04,183 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 5126 transitions. Word has length 24 [2022-03-03 20:04:04,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:04,183 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 5126 transitions. [2022-03-03 20:04:04,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:04,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 5126 transitions. [2022-03-03 20:04:04,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:04:04,186 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:04,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:04:04,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-03 20:04:04,401 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 [2022-03-03 20:04:04,401 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:04,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:04,402 INFO L85 PathProgramCache]: Analyzing trace with hash -250388914, now seen corresponding path program 23 times [2022-03-03 20:04:04,402 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:04,402 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205913759] [2022-03-03 20:04:04,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:04,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:04,442 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:04,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205913759] [2022-03-03 20:04:04,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205913759] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:04,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651432235] [2022-03-03 20:04:04,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:04:04,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:04,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:04,444 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) [2022-03-03 20:04:04,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-03 20:04:04,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:04:04,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:04,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:04:04,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:04,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:04,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:04:04,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651432235] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:04,645 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:04,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 20:04:04,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367292311] [2022-03-03 20:04:04,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:04,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:04:04,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:04,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:04:04,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:04:04,646 INFO L87 Difference]: Start difference. First operand 1429 states and 5126 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:05,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:05,355 INFO L93 Difference]: Finished difference Result 4260 states and 13532 transitions. [2022-03-03 20:04:05,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 20:04:05,355 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:04:05,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:05,362 INFO L225 Difference]: With dead ends: 4260 [2022-03-03 20:04:05,363 INFO L226 Difference]: Without dead ends: 4260 [2022-03-03 20:04:05,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=860, Invalid=2220, Unknown=0, NotChecked=0, Total=3080 [2022-03-03 20:04:05,364 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 350 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:05,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 198 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:04:05,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2022-03-03 20:04:05,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 1426. [2022-03-03 20:04:05,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.5873684210526315) internal successors, (5112), 1425 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:05,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 5112 transitions. [2022-03-03 20:04:05,401 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 5112 transitions. Word has length 24 [2022-03-03 20:04:05,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:05,401 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 5112 transitions. [2022-03-03 20:04:05,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:05,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 5112 transitions. [2022-03-03 20:04:05,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:04:05,411 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:05,411 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:04:05,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-03 20:04:05,627 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 [2022-03-03 20:04:05,628 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:05,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:05,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1422734772, now seen corresponding path program 24 times [2022-03-03 20:04:05,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:05,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942522090] [2022-03-03 20:04:05,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:05,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:05,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:05,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:05,668 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:05,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942522090] [2022-03-03 20:04:05,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942522090] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:05,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927728123] [2022-03-03 20:04:05,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:04:05,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:05,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:05,671 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:04:05,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:04:05,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:05,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-03 20:04:05,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:04:05,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:05,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:05,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:05,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:05,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927728123] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:05,843 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:05,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-03 20:04:05,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866680503] [2022-03-03 20:04:05,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:05,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 20:04:05,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:05,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 20:04:05,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-03 20:04:05,843 INFO L87 Difference]: Start difference. First operand 1426 states and 5112 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2022-03-03 20:04:06,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:06,416 INFO L93 Difference]: Finished difference Result 4602 states and 14473 transitions. [2022-03-03 20:04:06,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 20:04:06,416 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:04:06,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:06,424 INFO L225 Difference]: With dead ends: 4602 [2022-03-03 20:04:06,424 INFO L226 Difference]: Without dead ends: 4602 [2022-03-03 20:04:06,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 20:04:06,425 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 307 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:06,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 195 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:04:06,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-03-03 20:04:06,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 1436. [2022-03-03 20:04:06,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.592334494773519) internal successors, (5155), 1435 states have internal predecessors, (5155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:06,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5155 transitions. [2022-03-03 20:04:06,464 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5155 transitions. Word has length 24 [2022-03-03 20:04:06,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:06,464 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5155 transitions. [2022-03-03 20:04:06,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2022-03-03 20:04:06,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5155 transitions. [2022-03-03 20:04:06,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:04:06,466 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:06,466 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:04:06,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-03 20:04:06,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:06,682 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:06,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:06,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1341358684, now seen corresponding path program 25 times [2022-03-03 20:04:06,682 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:06,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50263330] [2022-03-03 20:04:06,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:06,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:06,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:06,713 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:06,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50263330] [2022-03-03 20:04:06,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50263330] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:06,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855112022] [2022-03-03 20:04:06,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:04:06,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:06,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:06,715 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:04:06,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-03 20:04:06,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:06,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:04:06,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:06,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:06,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:06,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855112022] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:06,826 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:06,826 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-03 20:04:06,827 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759663709] [2022-03-03 20:04:06,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:06,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 20:04:06,827 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:06,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 20:04:06,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-03 20:04:06,827 INFO L87 Difference]: Start difference. First operand 1436 states and 5155 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2022-03-03 20:04:07,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:07,223 INFO L93 Difference]: Finished difference Result 4348 states and 13871 transitions. [2022-03-03 20:04:07,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 20:04:07,223 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:04:07,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:07,230 INFO L225 Difference]: With dead ends: 4348 [2022-03-03 20:04:07,230 INFO L226 Difference]: Without dead ends: 4344 [2022-03-03 20:04:07,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 20:04:07,231 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 330 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:07,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 182 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:04:07,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4344 states. [2022-03-03 20:04:07,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4344 to 1436. [2022-03-03 20:04:07,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:07,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-03-03 20:04:07,269 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-03-03 20:04:07,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:07,269 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-03-03 20:04:07,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2022-03-03 20:04:07,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-03-03 20:04:07,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:04:07,272 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:07,272 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:04:07,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-03 20:04:07,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:07,488 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:07,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:07,488 INFO L85 PathProgramCache]: Analyzing trace with hash -410701468, now seen corresponding path program 26 times [2022-03-03 20:04:07,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:07,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659731834] [2022-03-03 20:04:07,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:07,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:07,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:07,519 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:07,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659731834] [2022-03-03 20:04:07,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659731834] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:07,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757608282] [2022-03-03 20:04:07,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:04:07,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:07,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:07,530 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:04:07,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-03 20:04:07,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:04:07,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:07,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:04:07,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:07,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:07,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:07,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:04:07,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757608282] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:07,701 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:07,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 20:04:07,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468232550] [2022-03-03 20:04:07,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:07,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:04:07,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:07,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:04:07,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:04:07,702 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-03-03 20:04:08,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:08,197 INFO L93 Difference]: Finished difference Result 4035 states and 12669 transitions. [2022-03-03 20:04:08,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 20:04:08,197 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 24 [2022-03-03 20:04:08,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:08,204 INFO L225 Difference]: With dead ends: 4035 [2022-03-03 20:04:08,204 INFO L226 Difference]: Without dead ends: 4035 [2022-03-03 20:04:08,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=640, Invalid=1616, Unknown=0, NotChecked=0, Total=2256 [2022-03-03 20:04:08,205 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 468 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:08,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 209 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:04:08,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4035 states. [2022-03-03 20:04:08,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4035 to 1442. [2022-03-03 20:04:08,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.5933379597501736) internal successors, (5178), 1441 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:08,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 5178 transitions. [2022-03-03 20:04:08,250 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 5178 transitions. Word has length 24 [2022-03-03 20:04:08,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:08,250 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 5178 transitions. [2022-03-03 20:04:08,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-03-03 20:04:08,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 5178 transitions. [2022-03-03 20:04:08,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:04:08,252 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:08,253 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:04:08,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-03 20:04:08,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:08,467 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:08,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:08,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1232337686, now seen corresponding path program 27 times [2022-03-03 20:04:08,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:08,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659754613] [2022-03-03 20:04:08,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:08,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:08,532 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:08,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659754613] [2022-03-03 20:04:08,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659754613] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:08,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903026740] [2022-03-03 20:04:08,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:04:08,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:08,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:08,533 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:04:08,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-03 20:04:08,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:04:08,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:08,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:04:08,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:08,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:08,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:08,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:04:08,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903026740] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:08,672 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:08,672 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 20:04:08,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663232673] [2022-03-03 20:04:08,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:08,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:04:08,672 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:08,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:04:08,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:04:08,673 INFO L87 Difference]: Start difference. First operand 1442 states and 5178 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-03-03 20:04:09,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:09,171 INFO L93 Difference]: Finished difference Result 3794 states and 12201 transitions. [2022-03-03 20:04:09,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 20:04:09,172 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 24 [2022-03-03 20:04:09,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:09,179 INFO L225 Difference]: With dead ends: 3794 [2022-03-03 20:04:09,179 INFO L226 Difference]: Without dead ends: 3790 [2022-03-03 20:04:09,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=800, Invalid=2392, Unknown=0, NotChecked=0, Total=3192 [2022-03-03 20:04:09,180 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 453 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:09,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 178 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:04:09,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2022-03-03 20:04:09,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 1436. [2022-03-03 20:04:09,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:09,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-03-03 20:04:09,215 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-03-03 20:04:09,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:09,215 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-03-03 20:04:09,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-03-03 20:04:09,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-03-03 20:04:09,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:04:09,218 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:09,218 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:04:09,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-03 20:04:09,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-03-03 20:04:09,431 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:09,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:09,432 INFO L85 PathProgramCache]: Analyzing trace with hash -2059201626, now seen corresponding path program 28 times [2022-03-03 20:04:09,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:09,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229833925] [2022-03-03 20:04:09,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:09,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:09,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:09,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:09,487 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:09,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229833925] [2022-03-03 20:04:09,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229833925] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:09,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110194852] [2022-03-03 20:04:09,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:04:09,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:09,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:09,488 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:04:09,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-03 20:04:09,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:04:09,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:09,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:04:09,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:09,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:09,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:09,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:09,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110194852] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:09,596 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:09,596 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 20:04:09,596 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830257112] [2022-03-03 20:04:09,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:09,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 20:04:09,596 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:09,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 20:04:09,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:04:09,597 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:10,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:10,053 INFO L93 Difference]: Finished difference Result 3978 states and 12923 transitions. [2022-03-03 20:04:10,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 20:04:10,053 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:04:10,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:10,060 INFO L225 Difference]: With dead ends: 3978 [2022-03-03 20:04:10,060 INFO L226 Difference]: Without dead ends: 3978 [2022-03-03 20:04:10,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=699, Invalid=2271, Unknown=0, NotChecked=0, Total=2970 [2022-03-03 20:04:10,060 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 272 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:10,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 165 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:04:10,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3978 states. [2022-03-03 20:04:10,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3978 to 1585. [2022-03-03 20:04:10,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.591540404040404) internal successors, (5689), 1584 states have internal predecessors, (5689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:10,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5689 transitions. [2022-03-03 20:04:10,126 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5689 transitions. Word has length 24 [2022-03-03 20:04:10,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:10,126 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 5689 transitions. [2022-03-03 20:04:10,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:10,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5689 transitions. [2022-03-03 20:04:10,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:04:10,129 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:10,129 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:04:10,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-03 20:04:10,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:10,344 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:10,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:10,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1977825538, now seen corresponding path program 29 times [2022-03-03 20:04:10,345 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:10,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949288881] [2022-03-03 20:04:10,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:10,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:10,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:10,376 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:10,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949288881] [2022-03-03 20:04:10,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949288881] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:10,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344077308] [2022-03-03 20:04:10,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:04:10,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:10,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:10,377 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:04:10,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-03 20:04:10,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:04:10,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:10,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:04:10,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:10,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:10,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344077308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:10,472 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:10,472 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 20:04:10,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879067950] [2022-03-03 20:04:10,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:10,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 20:04:10,473 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:10,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 20:04:10,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:04:10,473 INFO L87 Difference]: Start difference. First operand 1585 states and 5689 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:10,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:10,801 INFO L93 Difference]: Finished difference Result 3706 states and 12257 transitions. [2022-03-03 20:04:10,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 20:04:10,801 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:04:10,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:10,807 INFO L225 Difference]: With dead ends: 3706 [2022-03-03 20:04:10,807 INFO L226 Difference]: Without dead ends: 3702 [2022-03-03 20:04:10,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 20:04:10,808 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 265 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:10,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 150 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:04:10,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2022-03-03 20:04:10,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 1575. [2022-03-03 20:04:10,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 3.5870393900889455) internal successors, (5646), 1574 states have internal predecessors, (5646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:10,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5646 transitions. [2022-03-03 20:04:10,860 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5646 transitions. Word has length 24 [2022-03-03 20:04:10,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:10,860 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 5646 transitions. [2022-03-03 20:04:10,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:10,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5646 transitions. [2022-03-03 20:04:10,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:04:10,863 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:10,863 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:04:10,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-03 20:04:11,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:11,079 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:11,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:11,079 INFO L85 PathProgramCache]: Analyzing trace with hash 802049786, now seen corresponding path program 30 times [2022-03-03 20:04:11,079 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:11,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657767267] [2022-03-03 20:04:11,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:11,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:11,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:11,112 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:11,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657767267] [2022-03-03 20:04:11,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657767267] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:11,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164711592] [2022-03-03 20:04:11,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:04:11,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:11,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:11,114 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:04:11,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-03 20:04:11,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:04:11,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:11,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:04:11,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:11,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:11,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:11,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:11,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164711592] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:11,220 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:11,220 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 20:04:11,220 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769007811] [2022-03-03 20:04:11,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:11,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 20:04:11,221 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:11,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 20:04:11,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:04:11,221 INFO L87 Difference]: Start difference. First operand 1575 states and 5646 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:11,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:11,588 INFO L93 Difference]: Finished difference Result 4114 states and 13193 transitions. [2022-03-03 20:04:11,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 20:04:11,588 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:04:11,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:11,594 INFO L225 Difference]: With dead ends: 4114 [2022-03-03 20:04:11,594 INFO L226 Difference]: Without dead ends: 4102 [2022-03-03 20:04:11,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2022-03-03 20:04:11,595 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 304 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:11,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 167 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:04:11,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2022-03-03 20:04:11,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 1595. [2022-03-03 20:04:11,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.5884567126725218) internal successors, (5720), 1594 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:11,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5720 transitions. [2022-03-03 20:04:11,630 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5720 transitions. Word has length 24 [2022-03-03 20:04:11,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:11,630 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 5720 transitions. [2022-03-03 20:04:11,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:11,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5720 transitions. [2022-03-03 20:04:11,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:04:11,632 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:11,633 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:04:11,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-03 20:04:11,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-03 20:04:11,839 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:11,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:11,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1895790794, now seen corresponding path program 31 times [2022-03-03 20:04:11,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:11,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425979858] [2022-03-03 20:04:11,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:11,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:11,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:11,907 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:11,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425979858] [2022-03-03 20:04:11,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425979858] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:11,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946600152] [2022-03-03 20:04:11,908 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:04:11,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:11,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:11,911 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:04:12,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-03 20:04:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:12,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:04:12,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:12,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:12,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:12,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:12,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946600152] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:12,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:12,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 20:04:12,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135035637] [2022-03-03 20:04:12,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:12,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:04:12,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:12,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:04:12,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:04:12,218 INFO L87 Difference]: Start difference. First operand 1595 states and 5720 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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) [2022-03-03 20:04:12,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:12,713 INFO L93 Difference]: Finished difference Result 3694 states and 11776 transitions. [2022-03-03 20:04:12,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 20:04:12,713 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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 24 [2022-03-03 20:04:12,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:12,719 INFO L225 Difference]: With dead ends: 3694 [2022-03-03 20:04:12,719 INFO L226 Difference]: Without dead ends: 3694 [2022-03-03 20:04:12,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=678, Invalid=1772, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 20:04:12,720 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 344 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:12,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 268 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:04:12,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2022-03-03 20:04:12,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 1680. [2022-03-03 20:04:12,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.5842763549731984) internal successors, (6018), 1679 states have internal predecessors, (6018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:12,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 6018 transitions. [2022-03-03 20:04:12,757 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 6018 transitions. Word has length 24 [2022-03-03 20:04:12,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:12,757 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 6018 transitions. [2022-03-03 20:04:12,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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) [2022-03-03 20:04:12,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 6018 transitions. [2022-03-03 20:04:12,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:04:12,760 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:12,760 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:04:12,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-03 20:04:12,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-03 20:04:12,976 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:12,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:12,976 INFO L85 PathProgramCache]: Analyzing trace with hash -252751640, now seen corresponding path program 32 times [2022-03-03 20:04:12,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:12,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848033607] [2022-03-03 20:04:12,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:12,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:12,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:13,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:13,023 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:13,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848033607] [2022-03-03 20:04:13,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848033607] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:13,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263544657] [2022-03-03 20:04:13,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:04:13,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:13,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:13,024 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:04:13,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-03 20:04:13,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:04:13,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:13,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:04:13,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:13,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:13,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:13,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263544657] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:13,176 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:13,177 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 20:04:13,177 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339584634] [2022-03-03 20:04:13,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:13,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:04:13,177 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:13,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:04:13,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:04:13,177 INFO L87 Difference]: Start difference. First operand 1680 states and 6018 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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) [2022-03-03 20:04:13,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:13,747 INFO L93 Difference]: Finished difference Result 3420 states and 11230 transitions. [2022-03-03 20:04:13,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 20:04:13,747 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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 24 [2022-03-03 20:04:13,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:13,752 INFO L225 Difference]: With dead ends: 3420 [2022-03-03 20:04:13,752 INFO L226 Difference]: Without dead ends: 3416 [2022-03-03 20:04:13,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=880, Invalid=2780, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 20:04:13,753 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 343 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:13,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 234 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:04:13,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2022-03-03 20:04:13,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 1678. [2022-03-03 20:04:13,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 3.5819916517590937) internal successors, (6007), 1677 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:13,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6007 transitions. [2022-03-03 20:04:13,785 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6007 transitions. Word has length 24 [2022-03-03 20:04:13,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:13,786 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 6007 transitions. [2022-03-03 20:04:13,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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) [2022-03-03 20:04:13,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6007 transitions. [2022-03-03 20:04:13,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:04:13,789 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:13,789 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:04:13,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-03 20:04:14,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-03 20:04:14,005 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:14,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:14,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1520208818, now seen corresponding path program 33 times [2022-03-03 20:04:14,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:14,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697732552] [2022-03-03 20:04:14,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:14,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:14,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:14,068 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:14,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697732552] [2022-03-03 20:04:14,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697732552] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:14,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950789942] [2022-03-03 20:04:14,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:04:14,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:14,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:14,069 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:04:14,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-03 20:04:14,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:04:14,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:14,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:04:14,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:14,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:14,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:14,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950789942] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:14,182 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:14,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-03 20:04:14,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512603702] [2022-03-03 20:04:14,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:14,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 20:04:14,182 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:14,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 20:04:14,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:04:14,182 INFO L87 Difference]: Start difference. First operand 1678 states and 6007 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2022-03-03 20:04:14,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:14,599 INFO L93 Difference]: Finished difference Result 3256 states and 10823 transitions. [2022-03-03 20:04:14,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 20:04:14,599 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:04:14,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:14,604 INFO L225 Difference]: With dead ends: 3256 [2022-03-03 20:04:14,605 INFO L226 Difference]: Without dead ends: 3244 [2022-03-03 20:04:14,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 20:04:14,605 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 257 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:14,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 170 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:04:14,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2022-03-03 20:04:14,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 1676. [2022-03-03 20:04:14,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.5797014925373136) internal successors, (5996), 1675 states have internal predecessors, (5996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:14,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5996 transitions. [2022-03-03 20:04:14,669 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5996 transitions. Word has length 24 [2022-03-03 20:04:14,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:14,669 INFO L470 AbstractCegarLoop]: Abstraction has 1676 states and 5996 transitions. [2022-03-03 20:04:14,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2022-03-03 20:04:14,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5996 transitions. [2022-03-03 20:04:14,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:04:14,672 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:14,672 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, 1] [2022-03-03 20:04:14,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-03 20:04:14,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-03 20:04:14,888 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:14,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:14,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1154803164, now seen corresponding path program 4 times [2022-03-03 20:04:14,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:14,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223579899] [2022-03-03 20:04:14,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:14,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:15,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:15,442 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:15,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223579899] [2022-03-03 20:04:15,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223579899] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:15,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159918662] [2022-03-03 20:04:15,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:04:15,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:15,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:15,443 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:04:15,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-03 20:04:15,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:04:15,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:15,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 20:04:15,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:16,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:04:16,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:16,197 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 109 treesize of output 75 [2022-03-03 20:04:16,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:16,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:17,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:17,563 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:04:17,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 343 treesize of output 269 [2022-03-03 20:04:20,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:20,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159918662] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:20,318 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:20,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:04:20,319 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075830152] [2022-03-03 20:04:20,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:20,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:04:20,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:20,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:04:20,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:04:20,319 INFO L87 Difference]: Start difference. First operand 1676 states and 5996 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:26,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:26,991 INFO L93 Difference]: Finished difference Result 4116 states and 13116 transitions. [2022-03-03 20:04:26,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 20:04:26,991 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:04:26,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:26,998 INFO L225 Difference]: With dead ends: 4116 [2022-03-03 20:04:26,999 INFO L226 Difference]: Without dead ends: 4056 [2022-03-03 20:04:26,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1677 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=978, Invalid=4134, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 20:04:26,999 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 582 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:26,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 281 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 20:04:27,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4056 states. [2022-03-03 20:04:27,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4056 to 1792. [2022-03-03 20:04:27,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1791 states have (on average 3.5907314349525405) internal successors, (6431), 1791 states have internal predecessors, (6431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:27,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 6431 transitions. [2022-03-03 20:04:27,039 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 6431 transitions. Word has length 26 [2022-03-03 20:04:27,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:27,039 INFO L470 AbstractCegarLoop]: Abstraction has 1792 states and 6431 transitions. [2022-03-03 20:04:27,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:27,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 6431 transitions. [2022-03-03 20:04:27,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:04:27,043 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:27,043 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:04:27,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-03 20:04:27,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-03 20:04:27,259 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:27,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:27,259 INFO L85 PathProgramCache]: Analyzing trace with hash -873594852, now seen corresponding path program 5 times [2022-03-03 20:04:27,259 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:27,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666463702] [2022-03-03 20:04:27,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:27,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:27,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:27,831 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:27,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666463702] [2022-03-03 20:04:27,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666463702] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:27,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742325495] [2022-03-03 20:04:27,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:04:27,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:27,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:27,832 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:04:27,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-03 20:04:27,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:04:27,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:27,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 20:04:27,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:28,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:04:28,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:28,376 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 109 treesize of output 75 [2022-03-03 20:04:28,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:28,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:29,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:29,732 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:04:29,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 335 treesize of output 261 [2022-03-03 20:04:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:32,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742325495] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:32,173 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:32,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:04:32,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045007211] [2022-03-03 20:04:32,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:32,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:04:32,173 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:32,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:04:32,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:04:32,175 INFO L87 Difference]: Start difference. First operand 1792 states and 6431 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:37,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:37,416 INFO L93 Difference]: Finished difference Result 4145 states and 13246 transitions. [2022-03-03 20:04:37,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 20:04:37,417 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:04:37,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:37,424 INFO L225 Difference]: With dead ends: 4145 [2022-03-03 20:04:37,424 INFO L226 Difference]: Without dead ends: 4115 [2022-03-03 20:04:37,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1762 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1006, Invalid=4396, Unknown=0, NotChecked=0, Total=5402 [2022-03-03 20:04:37,425 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 493 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:37,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 373 Invalid, 1595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1394 Invalid, 0 Unknown, 85 Unchecked, 0.8s Time] [2022-03-03 20:04:37,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4115 states. [2022-03-03 20:04:37,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4115 to 1818. [2022-03-03 20:04:37,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.5833791964777104) internal successors, (6511), 1817 states have internal predecessors, (6511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:37,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6511 transitions. [2022-03-03 20:04:37,464 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6511 transitions. Word has length 26 [2022-03-03 20:04:37,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:37,465 INFO L470 AbstractCegarLoop]: Abstraction has 1818 states and 6511 transitions. [2022-03-03 20:04:37,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:37,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6511 transitions. [2022-03-03 20:04:37,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:04:37,468 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:37,468 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:04:37,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-03 20:04:37,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-03 20:04:37,684 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:37,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:37,684 INFO L85 PathProgramCache]: Analyzing trace with hash 717834456, now seen corresponding path program 34 times [2022-03-03 20:04:37,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:37,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818103387] [2022-03-03 20:04:37,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:37,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:37,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:38,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:38,345 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:38,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818103387] [2022-03-03 20:04:38,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818103387] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:38,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62442770] [2022-03-03 20:04:38,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:04:38,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:38,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:38,346 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:04:38,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-03 20:04:38,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:04:38,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:38,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:04:38,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:38,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:04:38,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:04:38,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:38,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:04:38,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 75 [2022-03-03 20:04:39,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:39,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:39,994 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:04:39,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 371 treesize of output 253 [2022-03-03 20:04:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:40,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62442770] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:40,854 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:40,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-03-03 20:04:40,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233486124] [2022-03-03 20:04:40,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:40,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:04:40,854 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:40,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:04:40,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:04:40,855 INFO L87 Difference]: Start difference. First operand 1818 states and 6511 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:47,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:04:47,658 INFO L93 Difference]: Finished difference Result 3781 states and 12664 transitions. [2022-03-03 20:04:47,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-03 20:04:47,658 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:04:47,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:04:47,665 INFO L225 Difference]: With dead ends: 3781 [2022-03-03 20:04:47,666 INFO L226 Difference]: Without dead ends: 3751 [2022-03-03 20:04:47,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2721 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1161, Invalid=7029, Unknown=0, NotChecked=0, Total=8190 [2022-03-03 20:04:47,666 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 350 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:04:47,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 301 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1524 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 20:04:47,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3751 states. [2022-03-03 20:04:47,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3751 to 1891. [2022-03-03 20:04:47,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1891 states, 1890 states have (on average 3.5783068783068783) internal successors, (6763), 1890 states have internal predecessors, (6763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:47,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1891 states to 1891 states and 6763 transitions. [2022-03-03 20:04:47,707 INFO L78 Accepts]: Start accepts. Automaton has 1891 states and 6763 transitions. Word has length 26 [2022-03-03 20:04:47,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:04:47,707 INFO L470 AbstractCegarLoop]: Abstraction has 1891 states and 6763 transitions. [2022-03-03 20:04:47,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:04:47,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1891 states and 6763 transitions. [2022-03-03 20:04:47,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:04:47,711 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:04:47,711 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, 1] [2022-03-03 20:04:47,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-03 20:04:47,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-03 20:04:47,927 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:04:47,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:04:47,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1522881632, now seen corresponding path program 6 times [2022-03-03 20:04:47,927 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:04:47,927 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080669480] [2022-03-03 20:04:47,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:04:47,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:04:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:04:48,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:48,661 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:04:48,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080669480] [2022-03-03 20:04:48,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080669480] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:04:48,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299658499] [2022-03-03 20:04:48,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:04:48,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:04:48,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:04:48,663 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:04:48,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-03 20:04:48,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:04:48,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:04:48,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:04:48,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:04:49,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:04:49,227 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:04:49,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:04:49,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:49,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:04:50,749 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:04:50,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 455 treesize of output 333 [2022-03-03 20:04:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:04:56,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299658499] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:04:56,016 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:04:56,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:04:56,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880669642] [2022-03-03 20:04:56,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:04:56,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:04:56,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:04:56,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:04:56,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:04:56,016 INFO L87 Difference]: Start difference. First operand 1891 states and 6763 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:08,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:05:08,143 INFO L93 Difference]: Finished difference Result 4612 states and 14736 transitions. [2022-03-03 20:05:08,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-03 20:05:08,144 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:05:08,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:05:08,151 INFO L225 Difference]: With dead ends: 4612 [2022-03-03 20:05:08,151 INFO L226 Difference]: Without dead ends: 4567 [2022-03-03 20:05:08,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3155 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=1233, Invalid=8079, Unknown=0, NotChecked=0, Total=9312 [2022-03-03 20:05:08,159 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 604 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 2490 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 2579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:05:08,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [604 Valid, 518 Invalid, 2579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2490 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-03 20:05:08,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4567 states. [2022-03-03 20:05:08,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4567 to 1942. [2022-03-03 20:05:08,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1941 states have (on average 3.573415765069552) internal successors, (6936), 1941 states have internal predecessors, (6936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:08,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 6936 transitions. [2022-03-03 20:05:08,202 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 6936 transitions. Word has length 26 [2022-03-03 20:05:08,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:05:08,203 INFO L470 AbstractCegarLoop]: Abstraction has 1942 states and 6936 transitions. [2022-03-03 20:05:08,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:08,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 6936 transitions. [2022-03-03 20:05:08,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:05:08,207 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:05:08,207 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:05:08,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-03 20:05:08,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-03 20:05:08,421 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:05:08,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:05:08,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1221704100, now seen corresponding path program 35 times [2022-03-03 20:05:08,422 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:05:08,422 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021425391] [2022-03-03 20:05:08,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:05:08,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:05:08,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:05:08,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:08,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:05:08,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021425391] [2022-03-03 20:05:08,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021425391] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:05:08,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370835850] [2022-03-03 20:05:08,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:05:08,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:05:08,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:05:08,970 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:05:08,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-03 20:05:08,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:05:08,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:05:08,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:05:08,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:05:09,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:05:09,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:09,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:09,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-03-03 20:05:09,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:09,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:05:10,639 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:05:10,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 371 treesize of output 253 [2022-03-03 20:05:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:11,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370835850] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:05:11,438 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:05:11,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-03-03 20:05:11,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870525786] [2022-03-03 20:05:11,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:05:11,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:05:11,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:05:11,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:05:11,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:05:11,439 INFO L87 Difference]: Start difference. First operand 1942 states and 6936 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:19,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:05:19,731 INFO L93 Difference]: Finished difference Result 4522 states and 14852 transitions. [2022-03-03 20:05:19,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-03 20:05:19,731 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:05:19,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:05:19,739 INFO L225 Difference]: With dead ends: 4522 [2022-03-03 20:05:19,739 INFO L226 Difference]: Without dead ends: 4460 [2022-03-03 20:05:19,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3288 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1538, Invalid=7582, Unknown=0, NotChecked=0, Total=9120 [2022-03-03 20:05:19,741 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 475 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 2033 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 2147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 2033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:05:19,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 490 Invalid, 2147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 2033 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 20:05:19,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4460 states. [2022-03-03 20:05:19,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4460 to 1990. [2022-03-03 20:05:19,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1990 states, 1989 states have (on average 3.572649572649573) internal successors, (7106), 1989 states have internal predecessors, (7106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:19,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1990 states to 1990 states and 7106 transitions. [2022-03-03 20:05:19,799 INFO L78 Accepts]: Start accepts. Automaton has 1990 states and 7106 transitions. Word has length 26 [2022-03-03 20:05:19,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:05:19,799 INFO L470 AbstractCegarLoop]: Abstraction has 1990 states and 7106 transitions. [2022-03-03 20:05:19,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:19,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1990 states and 7106 transitions. [2022-03-03 20:05:19,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:05:19,803 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:05:19,803 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:05:19,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-03 20:05:20,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:05:20,019 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:05:20,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:05:20,019 INFO L85 PathProgramCache]: Analyzing trace with hash 2096944352, now seen corresponding path program 36 times [2022-03-03 20:05:20,019 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:05:20,019 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080107709] [2022-03-03 20:05:20,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:05:20,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:05:20,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:05:20,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:20,578 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:05:20,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080107709] [2022-03-03 20:05:20,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080107709] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:05:20,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870547894] [2022-03-03 20:05:20,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:05:20,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:05:20,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:05:20,580 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:05:20,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-03 20:05:20,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:05:20,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:05:20,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:05:20,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:05:21,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:05:21,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:05:21,097 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:05:21,097 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 115 treesize of output 101 [2022-03-03 20:05:21,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:21,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:05:22,376 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:05:22,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 371 treesize of output 253 [2022-03-03 20:05:23,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:23,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870547894] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:05:23,188 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:05:23,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 25 [2022-03-03 20:05:23,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060117722] [2022-03-03 20:05:23,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:05:23,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:05:23,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:05:23,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:05:23,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:05:23,189 INFO L87 Difference]: Start difference. First operand 1990 states and 7106 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:54,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:05:54,164 INFO L93 Difference]: Finished difference Result 5687 states and 18156 transitions. [2022-03-03 20:05:54,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2022-03-03 20:05:54,164 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:05:54,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:05:54,174 INFO L225 Difference]: With dead ends: 5687 [2022-03-03 20:05:54,174 INFO L226 Difference]: Without dead ends: 5639 [2022-03-03 20:05:54,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17823 ImplicationChecksByTransitivity, 28.6s TimeCoverageRelationStatistics Valid=4570, Invalid=38072, Unknown=0, NotChecked=0, Total=42642 [2022-03-03 20:05:54,177 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 745 mSDsluCounter, 1804 mSDsCounter, 0 mSdLazyCounter, 4875 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 4992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 4875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:05:54,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [745 Valid, 1029 Invalid, 4992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 4875 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-03 20:05:54,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5639 states. [2022-03-03 20:05:54,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5639 to 2081. [2022-03-03 20:05:54,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 2080 states have (on average 3.5673076923076925) internal successors, (7420), 2080 states have internal predecessors, (7420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:54,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 7420 transitions. [2022-03-03 20:05:54,231 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 7420 transitions. Word has length 26 [2022-03-03 20:05:54,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:05:54,231 INFO L470 AbstractCegarLoop]: Abstraction has 2081 states and 7420 transitions. [2022-03-03 20:05:54,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:05:54,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 7420 transitions. [2022-03-03 20:05:54,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:05:54,247 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:05:54,247 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, 1] [2022-03-03 20:05:54,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-03 20:05:54,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:05:54,463 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:05:54,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:05:54,464 INFO L85 PathProgramCache]: Analyzing trace with hash -964441720, now seen corresponding path program 7 times [2022-03-03 20:05:54,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:05:54,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947596581] [2022-03-03 20:05:54,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:05:54,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:05:54,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:05:54,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:54,896 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:05:54,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947596581] [2022-03-03 20:05:54,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947596581] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:05:54,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257614759] [2022-03-03 20:05:54,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:05:54,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:05:54,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:05:54,897 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:05:54,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-03 20:05:54,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:05:54,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 20:05:54,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:05:55,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:05:55,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:55,526 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 109 treesize of output 75 [2022-03-03 20:05:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:55,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:05:56,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:05:56,852 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:05:56,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 343 treesize of output 269 [2022-03-03 20:05:59,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:05:59,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257614759] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:05:59,869 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:05:59,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:05:59,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282328327] [2022-03-03 20:05:59,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:05:59,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:05:59,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:05:59,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:05:59,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:05:59,870 INFO L87 Difference]: Start difference. First operand 2081 states and 7420 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:06,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:06:06,384 INFO L93 Difference]: Finished difference Result 4614 states and 14746 transitions. [2022-03-03 20:06:06,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 20:06:06,384 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:06:06,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:06:06,391 INFO L225 Difference]: With dead ends: 4614 [2022-03-03 20:06:06,391 INFO L226 Difference]: Without dead ends: 4569 [2022-03-03 20:06:06,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=994, Invalid=4118, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 20:06:06,393 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 521 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:06:06,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 331 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1325 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 20:06:06,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4569 states. [2022-03-03 20:06:06,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4569 to 2109. [2022-03-03 20:06:06,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2109 states, 2108 states have (on average 3.562618595825427) internal successors, (7510), 2108 states have internal predecessors, (7510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:06,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2109 states to 2109 states and 7510 transitions. [2022-03-03 20:06:06,432 INFO L78 Accepts]: Start accepts. Automaton has 2109 states and 7510 transitions. Word has length 26 [2022-03-03 20:06:06,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:06:06,432 INFO L470 AbstractCegarLoop]: Abstraction has 2109 states and 7510 transitions. [2022-03-03 20:06:06,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:06,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2109 states and 7510 transitions. [2022-03-03 20:06:06,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:06:06,436 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:06:06,436 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, 1] [2022-03-03 20:06:06,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-03 20:06:06,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-03 20:06:06,651 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:06:06,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:06:06,651 INFO L85 PathProgramCache]: Analyzing trace with hash -2016520892, now seen corresponding path program 8 times [2022-03-03 20:06:06,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:06:06,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381718102] [2022-03-03 20:06:06,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:06:06,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:06:06,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:06:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:07,395 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:06:07,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381718102] [2022-03-03 20:06:07,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381718102] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:06:07,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396083745] [2022-03-03 20:06:07,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:06:07,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:06:07,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:06:07,396 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:06:07,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-03 20:06:07,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:06:07,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:06:07,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 20:06:07,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:06:08,046 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:06:08,046 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 109 treesize of output 91 [2022-03-03 20:06:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:09,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:06:09,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:06:09,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:06:09,986 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:06:09,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 335 treesize of output 253 [2022-03-03 20:06:11,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:11,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396083745] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:06:11,700 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:06:11,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-03-03 20:06:11,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722921336] [2022-03-03 20:06:11,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:06:11,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:06:11,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:06:11,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:06:11,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:06:11,700 INFO L87 Difference]: Start difference. First operand 2109 states and 7510 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:18,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:06:18,755 INFO L93 Difference]: Finished difference Result 4578 states and 15074 transitions. [2022-03-03 20:06:18,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 20:06:18,756 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:06:18,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:06:18,764 INFO L225 Difference]: With dead ends: 4578 [2022-03-03 20:06:18,764 INFO L226 Difference]: Without dead ends: 4542 [2022-03-03 20:06:18,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1839 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1030, Invalid=4822, Unknown=0, NotChecked=0, Total=5852 [2022-03-03 20:06:18,765 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 623 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 1510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:06:18,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 324 Invalid, 1510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1172 Invalid, 0 Unknown, 230 Unchecked, 0.8s Time] [2022-03-03 20:06:18,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4542 states. [2022-03-03 20:06:18,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4542 to 2177. [2022-03-03 20:06:18,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 2176 states have (on average 3.5565257352941178) internal successors, (7739), 2176 states have internal predecessors, (7739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:18,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 7739 transitions. [2022-03-03 20:06:18,815 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 7739 transitions. Word has length 26 [2022-03-03 20:06:18,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:06:18,815 INFO L470 AbstractCegarLoop]: Abstraction has 2177 states and 7739 transitions. [2022-03-03 20:06:18,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:18,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 7739 transitions. [2022-03-03 20:06:18,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:06:18,819 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:06:18,819 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, 1] [2022-03-03 20:06:18,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-03 20:06:19,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-03 20:06:19,020 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:06:19,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:06:19,020 INFO L85 PathProgramCache]: Analyzing trace with hash 784538682, now seen corresponding path program 9 times [2022-03-03 20:06:19,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:06:19,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931059527] [2022-03-03 20:06:19,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:06:19,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:06:19,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:06:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:19,571 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:06:19,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931059527] [2022-03-03 20:06:19,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931059527] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:06:19,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051088696] [2022-03-03 20:06:19,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:06:19,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:06:19,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:06:19,573 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:06:19,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-03 20:06:19,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:06:19,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:06:19,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 20:06:19,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:06:20,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:06:20,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:06:20,071 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 109 treesize of output 75 [2022-03-03 20:06:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:20,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:06:21,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:06:21,838 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:06:21,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 455 treesize of output 333 [2022-03-03 20:06:26,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:26,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051088696] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:06:26,105 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:06:26,105 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:06:26,105 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108971685] [2022-03-03 20:06:26,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:06:26,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:06:26,105 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:06:26,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:06:26,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:06:26,105 INFO L87 Difference]: Start difference. First operand 2177 states and 7739 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:32,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:06:32,082 INFO L93 Difference]: Finished difference Result 4623 states and 14847 transitions. [2022-03-03 20:06:32,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 20:06:32,083 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:06:32,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:06:32,091 INFO L225 Difference]: With dead ends: 4623 [2022-03-03 20:06:32,091 INFO L226 Difference]: Without dead ends: 4593 [2022-03-03 20:06:32,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1649 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=963, Invalid=4149, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 20:06:32,092 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 567 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 1348 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:06:32,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 335 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1348 Invalid, 0 Unknown, 23 Unchecked, 0.9s Time] [2022-03-03 20:06:32,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4593 states. [2022-03-03 20:06:32,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4593 to 2198. [2022-03-03 20:06:32,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2198 states, 2197 states have (on average 3.5616750113791533) internal successors, (7825), 2197 states have internal predecessors, (7825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:32,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2198 states to 2198 states and 7825 transitions. [2022-03-03 20:06:32,140 INFO L78 Accepts]: Start accepts. Automaton has 2198 states and 7825 transitions. Word has length 26 [2022-03-03 20:06:32,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:06:32,140 INFO L470 AbstractCegarLoop]: Abstraction has 2198 states and 7825 transitions. [2022-03-03 20:06:32,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:32,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2198 states and 7825 transitions. [2022-03-03 20:06:32,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:06:32,144 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:06:32,144 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, 1] [2022-03-03 20:06:32,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-03 20:06:32,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-03 20:06:32,354 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:06:32,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:06:32,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1377331970, now seen corresponding path program 10 times [2022-03-03 20:06:32,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:06:32,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072502284] [2022-03-03 20:06:32,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:06:32,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:06:32,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:06:33,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:33,178 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:06:33,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072502284] [2022-03-03 20:06:33,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072502284] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:06:33,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642918886] [2022-03-03 20:06:33,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:06:33,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:06:33,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:06:33,180 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:06:33,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-03 20:06:33,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:06:33,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:06:33,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:06:33,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:06:33,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:06:33,705 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:06:33,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:06:34,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:34,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:06:35,057 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:06:35,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 335 treesize of output 261 [2022-03-03 20:06:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:36,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642918886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:06:36,884 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:06:36,884 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:06:36,884 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155368467] [2022-03-03 20:06:36,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:06:36,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:06:36,884 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:06:36,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:06:36,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:06:36,885 INFO L87 Difference]: Start difference. First operand 2198 states and 7825 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:44,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:06:44,882 INFO L93 Difference]: Finished difference Result 4537 states and 14731 transitions. [2022-03-03 20:06:44,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-03 20:06:44,882 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:06:44,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:06:44,889 INFO L225 Difference]: With dead ends: 4537 [2022-03-03 20:06:44,889 INFO L226 Difference]: Without dead ends: 4500 [2022-03-03 20:06:44,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1007, Invalid=6475, Unknown=0, NotChecked=0, Total=7482 [2022-03-03 20:06:44,890 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 371 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 2575 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 2628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:06:44,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 560 Invalid, 2628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 2575 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 20:06:44,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4500 states. [2022-03-03 20:06:44,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4500 to 2189. [2022-03-03 20:06:44,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2188 states have (on average 3.5658135283363803) internal successors, (7802), 2188 states have internal predecessors, (7802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:44,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 7802 transitions. [2022-03-03 20:06:44,932 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 7802 transitions. Word has length 26 [2022-03-03 20:06:44,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:06:44,932 INFO L470 AbstractCegarLoop]: Abstraction has 2189 states and 7802 transitions. [2022-03-03 20:06:44,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:44,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 7802 transitions. [2022-03-03 20:06:44,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:06:44,936 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:06:44,936 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, 1] [2022-03-03 20:06:44,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-03 20:06:45,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:06:45,150 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:06:45,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:06:45,151 INFO L85 PathProgramCache]: Analyzing trace with hash -635282148, now seen corresponding path program 11 times [2022-03-03 20:06:45,151 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:06:45,151 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713942123] [2022-03-03 20:06:45,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:06:45,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:06:45,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:06:45,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:45,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:06:45,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713942123] [2022-03-03 20:06:45,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713942123] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:06:45,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619259728] [2022-03-03 20:06:45,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:06:45,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:06:45,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:06:45,703 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:06:45,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-03 20:06:45,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:06:45,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:06:45,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:06:45,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:06:46,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:06:46,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:06:46,211 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:06:46,213 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 83 [2022-03-03 20:06:46,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:46,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:06:47,865 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:06:47,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 343 treesize of output 269 [2022-03-03 20:06:49,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:49,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619259728] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:06:49,775 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:06:49,775 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:06:49,775 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36186763] [2022-03-03 20:06:49,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:06:49,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:06:49,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:06:49,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:06:49,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:06:49,781 INFO L87 Difference]: Start difference. First operand 2189 states and 7802 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:57,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:06:57,463 INFO L93 Difference]: Finished difference Result 4320 states and 13876 transitions. [2022-03-03 20:06:57,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-03 20:06:57,464 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:06:57,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:06:57,472 INFO L225 Difference]: With dead ends: 4320 [2022-03-03 20:06:57,472 INFO L226 Difference]: Without dead ends: 4260 [2022-03-03 20:06:57,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2571 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1114, Invalid=7076, Unknown=0, NotChecked=0, Total=8190 [2022-03-03 20:06:57,472 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 480 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 2503 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 2576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:06:57,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 461 Invalid, 2576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2503 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 20:06:57,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2022-03-03 20:06:57,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 2213. [2022-03-03 20:06:57,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2213 states, 2212 states have (on average 3.5687160940325495) internal successors, (7894), 2212 states have internal predecessors, (7894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:57,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2213 states to 2213 states and 7894 transitions. [2022-03-03 20:06:57,528 INFO L78 Accepts]: Start accepts. Automaton has 2213 states and 7894 transitions. Word has length 26 [2022-03-03 20:06:57,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:06:57,529 INFO L470 AbstractCegarLoop]: Abstraction has 2213 states and 7894 transitions. [2022-03-03 20:06:57,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:06:57,529 INFO L276 IsEmpty]: Start isEmpty. Operand 2213 states and 7894 transitions. [2022-03-03 20:06:57,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:06:57,532 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:06:57,533 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, 1] [2022-03-03 20:06:57,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-03 20:06:57,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-03 20:06:57,733 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:06:57,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:06:57,733 INFO L85 PathProgramCache]: Analyzing trace with hash -705646396, now seen corresponding path program 12 times [2022-03-03 20:06:57,734 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:06:57,734 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383239961] [2022-03-03 20:06:57,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:06:57,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:06:57,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:06:58,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:58,091 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:06:58,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383239961] [2022-03-03 20:06:58,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383239961] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:06:58,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203158967] [2022-03-03 20:06:58,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:06:58,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:06:58,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:06:58,092 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:06:58,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-03 20:06:58,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:06:58,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:06:58,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:06:58,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:06:58,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:06:58,663 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:06:58,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:06:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:06:59,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:07:00,376 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:07:00,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 343 treesize of output 269 [2022-03-03 20:07:06,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:06,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203158967] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:07:06,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:07:06,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:07:06,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594120140] [2022-03-03 20:07:06,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:07:06,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:07:06,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:07:06,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:07:06,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:07:06,284 INFO L87 Difference]: Start difference. First operand 2213 states and 7894 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:15,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:07:15,677 INFO L93 Difference]: Finished difference Result 4637 states and 15221 transitions. [2022-03-03 20:07:15,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-03 20:07:15,678 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:07:15,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:07:15,685 INFO L225 Difference]: With dead ends: 4637 [2022-03-03 20:07:15,685 INFO L226 Difference]: Without dead ends: 4607 [2022-03-03 20:07:15,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2586 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1053, Invalid=7137, Unknown=0, NotChecked=0, Total=8190 [2022-03-03 20:07:15,686 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 377 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 2300 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 2375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:07:15,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 473 Invalid, 2375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2300 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 20:07:15,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4607 states. [2022-03-03 20:07:15,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4607 to 2251. [2022-03-03 20:07:15,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2251 states, 2250 states have (on average 3.565777777777778) internal successors, (8023), 2250 states have internal predecessors, (8023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:15,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2251 states to 2251 states and 8023 transitions. [2022-03-03 20:07:15,730 INFO L78 Accepts]: Start accepts. Automaton has 2251 states and 8023 transitions. Word has length 26 [2022-03-03 20:07:15,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:07:15,730 INFO L470 AbstractCegarLoop]: Abstraction has 2251 states and 8023 transitions. [2022-03-03 20:07:15,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:15,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2251 states and 8023 transitions. [2022-03-03 20:07:15,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:07:15,734 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:07:15,734 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:07:15,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-03 20:07:15,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:07:15,947 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:07:15,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:07:15,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1043334006, now seen corresponding path program 13 times [2022-03-03 20:07:15,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:07:15,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396449796] [2022-03-03 20:07:15,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:07:15,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:07:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:07:16,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:16,570 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:07:16,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396449796] [2022-03-03 20:07:16,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396449796] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:07:16,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014643011] [2022-03-03 20:07:16,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:07:16,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:07:16,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:07:16,571 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:07:16,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-03 20:07:16,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:07:16,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:07:16,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:07:17,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:07:17,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:17,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:07:17,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:17,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:07:18,687 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:07:18,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 335 treesize of output 261 [2022-03-03 20:07:23,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:23,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014643011] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:07:23,013 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:07:23,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:07:23,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628286464] [2022-03-03 20:07:23,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:07:23,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:07:23,013 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:07:23,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:07:23,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:07:23,014 INFO L87 Difference]: Start difference. First operand 2251 states and 8023 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:29,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:07:29,842 INFO L93 Difference]: Finished difference Result 4402 states and 14468 transitions. [2022-03-03 20:07:29,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-03 20:07:29,842 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:07:29,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:07:29,867 INFO L225 Difference]: With dead ends: 4402 [2022-03-03 20:07:29,868 INFO L226 Difference]: Without dead ends: 4357 [2022-03-03 20:07:29,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1793 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=791, Invalid=5215, Unknown=0, NotChecked=0, Total=6006 [2022-03-03 20:07:29,870 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 343 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 1869 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 1933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:07:29,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 386 Invalid, 1933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1869 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-03 20:07:29,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4357 states. [2022-03-03 20:07:29,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4357 to 2243. [2022-03-03 20:07:29,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2243 states, 2242 states have (on average 3.569134701159679) internal successors, (8002), 2242 states have internal predecessors, (8002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:29,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2243 states to 2243 states and 8002 transitions. [2022-03-03 20:07:29,923 INFO L78 Accepts]: Start accepts. Automaton has 2243 states and 8002 transitions. Word has length 26 [2022-03-03 20:07:29,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:07:29,923 INFO L470 AbstractCegarLoop]: Abstraction has 2243 states and 8002 transitions. [2022-03-03 20:07:29,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:29,923 INFO L276 IsEmpty]: Start isEmpty. Operand 2243 states and 8002 transitions. [2022-03-03 20:07:29,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:07:29,930 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:07:29,930 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, 1] [2022-03-03 20:07:29,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-03 20:07:30,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-03 20:07:30,146 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:07:30,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:07:30,147 INFO L85 PathProgramCache]: Analyzing trace with hash -913979680, now seen corresponding path program 14 times [2022-03-03 20:07:30,147 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:07:30,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613297955] [2022-03-03 20:07:30,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:07:30,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:07:30,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:07:30,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:30,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:07:30,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613297955] [2022-03-03 20:07:30,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613297955] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:07:30,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838785049] [2022-03-03 20:07:30,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:07:30,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:07:30,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:07:30,355 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:07:30,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-03 20:07:30,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:07:30,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:07:30,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:07:30,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:07:30,770 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:30,770 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 109 treesize of output 91 [2022-03-03 20:07:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:32,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:07:33,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:07:33,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:07:33,304 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:33,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 347 treesize of output 261 [2022-03-03 20:07:35,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:35,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838785049] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:07:35,095 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:07:35,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-03 20:07:35,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867028872] [2022-03-03 20:07:35,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:07:35,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:07:35,096 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:07:35,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:07:35,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:07:35,096 INFO L87 Difference]: Start difference. First operand 2243 states and 8002 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:50,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:07:50,833 INFO L93 Difference]: Finished difference Result 5717 states and 18529 transitions. [2022-03-03 20:07:50,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-03 20:07:50,835 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:07:50,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:07:50,846 INFO L225 Difference]: With dead ends: 5717 [2022-03-03 20:07:50,846 INFO L226 Difference]: Without dead ends: 5643 [2022-03-03 20:07:50,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5160 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=2470, Invalid=11572, Unknown=0, NotChecked=0, Total=14042 [2022-03-03 20:07:50,847 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 710 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 1951 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 2062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:07:50,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [710 Valid, 511 Invalid, 2062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1951 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-03 20:07:50,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5643 states. [2022-03-03 20:07:50,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5643 to 2345. [2022-03-03 20:07:50,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2345 states, 2344 states have (on average 3.564419795221843) internal successors, (8355), 2344 states have internal predecessors, (8355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:50,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2345 states to 2345 states and 8355 transitions. [2022-03-03 20:07:50,910 INFO L78 Accepts]: Start accepts. Automaton has 2345 states and 8355 transitions. Word has length 26 [2022-03-03 20:07:50,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:07:50,910 INFO L470 AbstractCegarLoop]: Abstraction has 2345 states and 8355 transitions. [2022-03-03 20:07:50,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:07:50,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2345 states and 8355 transitions. [2022-03-03 20:07:50,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:07:50,914 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:07:50,914 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, 1] [2022-03-03 20:07:50,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-03 20:07:51,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-03 20:07:51,130 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:07:51,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:07:51,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1606033876, now seen corresponding path program 15 times [2022-03-03 20:07:51,131 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:07:51,131 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004547638] [2022-03-03 20:07:51,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:07:51,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:07:51,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:07:51,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:51,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:07:51,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004547638] [2022-03-03 20:07:51,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004547638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:07:51,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140821844] [2022-03-03 20:07:51,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:07:51,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:07:51,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:07:51,405 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:07:51,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-03 20:07:51,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:07:51,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:07:51,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-03 20:07:51,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:07:51,891 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:51,892 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 109 treesize of output 91 [2022-03-03 20:07:53,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:53,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:07:54,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:07:54,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:07:54,259 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:07:54,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 347 treesize of output 261 [2022-03-03 20:07:55,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:07:55,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140821844] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:07:55,818 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:07:55,818 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-03-03 20:07:55,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55101368] [2022-03-03 20:07:55,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:07:55,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:07:55,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:07:55,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:07:55,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:07:55,818 INFO L87 Difference]: Start difference. First operand 2345 states and 8355 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:03,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:08:03,482 INFO L93 Difference]: Finished difference Result 4725 states and 15681 transitions. [2022-03-03 20:08:03,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-03 20:08:03,482 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:08:03,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:08:03,491 INFO L225 Difference]: With dead ends: 4725 [2022-03-03 20:08:03,491 INFO L226 Difference]: Without dead ends: 4675 [2022-03-03 20:08:03,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1742 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1074, Invalid=4778, Unknown=0, NotChecked=0, Total=5852 [2022-03-03 20:08:03,492 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 605 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 1504 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:08:03,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [605 Valid, 342 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1504 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 20:08:03,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4675 states. [2022-03-03 20:08:03,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4675 to 2384. [2022-03-03 20:08:03,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2384 states, 2383 states have (on average 3.556021821233739) internal successors, (8474), 2383 states have internal predecessors, (8474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:03,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2384 states to 2384 states and 8474 transitions. [2022-03-03 20:08:03,551 INFO L78 Accepts]: Start accepts. Automaton has 2384 states and 8474 transitions. Word has length 26 [2022-03-03 20:08:03,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:08:03,552 INFO L470 AbstractCegarLoop]: Abstraction has 2384 states and 8474 transitions. [2022-03-03 20:08:03,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:03,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2384 states and 8474 transitions. [2022-03-03 20:08:03,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:08:03,556 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:08:03,556 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, 1] [2022-03-03 20:08:03,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-03 20:08:03,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:03,771 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:08:03,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:08:03,772 INFO L85 PathProgramCache]: Analyzing trace with hash 193303520, now seen corresponding path program 16 times [2022-03-03 20:08:03,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:08:03,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690559513] [2022-03-03 20:08:03,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:08:03,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:08:03,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:04,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:04,229 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:08:04,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690559513] [2022-03-03 20:08:04,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690559513] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:08:04,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925556149] [2022-03-03 20:08:04,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:08:04,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:04,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:08:04,231 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:08:04,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-03 20:08:04,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:08:04,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:08:04,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:08:04,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:08:04,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:08:04,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:04,641 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 89 treesize of output 65 [2022-03-03 20:08:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:05,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:08:06,629 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:08:06,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 467 treesize of output 333 [2022-03-03 20:08:11,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:11,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925556149] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:08:11,382 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:08:11,382 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 20:08:11,382 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998952347] [2022-03-03 20:08:11,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:08:11,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:08:11,382 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:08:11,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:08:11,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:08:11,383 INFO L87 Difference]: Start difference. First operand 2384 states and 8474 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:14,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:08:14,767 INFO L93 Difference]: Finished difference Result 3623 states and 12030 transitions. [2022-03-03 20:08:14,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 20:08:14,768 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:08:14,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:08:14,774 INFO L225 Difference]: With dead ends: 3623 [2022-03-03 20:08:14,774 INFO L226 Difference]: Without dead ends: 3593 [2022-03-03 20:08:14,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 20:08:14,775 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 198 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:08:14,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 286 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1113 Invalid, 0 Unknown, 150 Unchecked, 0.7s Time] [2022-03-03 20:08:14,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3593 states. [2022-03-03 20:08:14,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3593 to 2421. [2022-03-03 20:08:14,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2421 states, 2420 states have (on average 3.5504132231404957) internal successors, (8592), 2420 states have internal predecessors, (8592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:14,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2421 states to 2421 states and 8592 transitions. [2022-03-03 20:08:14,824 INFO L78 Accepts]: Start accepts. Automaton has 2421 states and 8592 transitions. Word has length 26 [2022-03-03 20:08:14,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:08:14,824 INFO L470 AbstractCegarLoop]: Abstraction has 2421 states and 8592 transitions. [2022-03-03 20:08:14,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:14,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2421 states and 8592 transitions. [2022-03-03 20:08:14,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:08:14,828 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:08:14,828 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, 1] [2022-03-03 20:08:14,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-03 20:08:15,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-03 20:08:15,043 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:08:15,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:08:15,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1764129120, now seen corresponding path program 17 times [2022-03-03 20:08:15,043 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:08:15,043 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670088863] [2022-03-03 20:08:15,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:08:15,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:08:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:15,363 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:08:15,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670088863] [2022-03-03 20:08:15,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670088863] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:08:15,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406721651] [2022-03-03 20:08:15,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:08:15,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:15,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:08:15,364 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:08:15,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-03 20:08:15,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:08:15,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:08:15,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:08:15,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:08:15,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:08:15,778 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:15,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 73 [2022-03-03 20:08:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:16,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:08:17,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:17,826 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:17,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 355 treesize of output 269 [2022-03-03 20:08:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:23,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406721651] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:08:23,881 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:08:23,881 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:08:23,881 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257184808] [2022-03-03 20:08:23,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:08:23,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:08:23,881 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:08:23,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:08:23,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:08:23,881 INFO L87 Difference]: Start difference. First operand 2421 states and 8592 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:30,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:08:30,962 INFO L93 Difference]: Finished difference Result 4910 states and 15923 transitions. [2022-03-03 20:08:30,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 20:08:30,962 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:08:30,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:08:30,971 INFO L225 Difference]: With dead ends: 4910 [2022-03-03 20:08:30,971 INFO L226 Difference]: Without dead ends: 4815 [2022-03-03 20:08:30,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1665 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=948, Invalid=4164, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 20:08:30,972 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 406 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 1621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 373 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:08:30,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 365 Invalid, 1621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1156 Invalid, 0 Unknown, 373 Unchecked, 0.8s Time] [2022-03-03 20:08:30,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4815 states. [2022-03-03 20:08:31,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4815 to 2534. [2022-03-03 20:08:31,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2533 states have (on average 3.549545992893802) internal successors, (8991), 2533 states have internal predecessors, (8991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:31,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 8991 transitions. [2022-03-03 20:08:31,026 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 8991 transitions. Word has length 26 [2022-03-03 20:08:31,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:08:31,026 INFO L470 AbstractCegarLoop]: Abstraction has 2534 states and 8991 transitions. [2022-03-03 20:08:31,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:31,026 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 8991 transitions. [2022-03-03 20:08:31,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:08:31,030 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:08:31,030 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, 1] [2022-03-03 20:08:31,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-03 20:08:31,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-03 20:08:31,246 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:08:31,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:08:31,247 INFO L85 PathProgramCache]: Analyzing trace with hash -340731392, now seen corresponding path program 18 times [2022-03-03 20:08:31,247 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:08:31,247 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320070410] [2022-03-03 20:08:31,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:08:31,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:08:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:31,755 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:08:31,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320070410] [2022-03-03 20:08:31,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320070410] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:08:31,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730774195] [2022-03-03 20:08:31,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:08:31,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:31,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:08:31,756 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:08:31,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-03 20:08:31,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:08:31,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:08:31,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:08:31,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:08:32,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:08:32,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:32,359 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 109 treesize of output 75 [2022-03-03 20:08:32,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:32,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:08:33,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:08:33,717 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:33,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 339 treesize of output 261 [2022-03-03 20:08:40,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:40,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730774195] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:08:40,295 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:08:40,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:08:40,295 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059783261] [2022-03-03 20:08:40,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:08:40,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:08:40,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:08:40,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:08:40,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:08:40,296 INFO L87 Difference]: Start difference. First operand 2534 states and 8991 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:45,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:08:45,111 INFO L93 Difference]: Finished difference Result 4511 states and 14825 transitions. [2022-03-03 20:08:45,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 20:08:45,111 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:08:45,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:08:45,119 INFO L225 Difference]: With dead ends: 4511 [2022-03-03 20:08:45,119 INFO L226 Difference]: Without dead ends: 4469 [2022-03-03 20:08:45,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=738, Invalid=3168, Unknown=0, NotChecked=0, Total=3906 [2022-03-03 20:08:45,120 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 384 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 398 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:08:45,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 291 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 702 Invalid, 0 Unknown, 398 Unchecked, 0.5s Time] [2022-03-03 20:08:45,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2022-03-03 20:08:45,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 2586. [2022-03-03 20:08:45,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2586 states, 2585 states have (on average 3.546615087040619) internal successors, (9168), 2585 states have internal predecessors, (9168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:45,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2586 states to 2586 states and 9168 transitions. [2022-03-03 20:08:45,167 INFO L78 Accepts]: Start accepts. Automaton has 2586 states and 9168 transitions. Word has length 26 [2022-03-03 20:08:45,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:08:45,167 INFO L470 AbstractCegarLoop]: Abstraction has 2586 states and 9168 transitions. [2022-03-03 20:08:45,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:45,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2586 states and 9168 transitions. [2022-03-03 20:08:45,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:08:45,171 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:08:45,171 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, 1] [2022-03-03 20:08:45,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-03 20:08:45,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:45,384 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:08:45,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:08:45,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1958264172, now seen corresponding path program 19 times [2022-03-03 20:08:45,385 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:08:45,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270894304] [2022-03-03 20:08:45,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:08:45,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:08:45,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:45,708 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:08:45,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270894304] [2022-03-03 20:08:45,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270894304] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:08:45,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122495227] [2022-03-03 20:08:45,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:08:45,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:45,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:08:45,709 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:08:45,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-03 20:08:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:45,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:08:45,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:08:46,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:08:46,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:08:46,025 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:08:46,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 105 [2022-03-03 20:08:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:46,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:08:47,846 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:08:47,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 411 treesize of output 309 [2022-03-03 20:08:53,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:53,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122495227] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:08:53,778 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:08:53,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:08:53,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667321096] [2022-03-03 20:08:53,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:08:53,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:08:53,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:08:53,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:08:53,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:08:53,779 INFO L87 Difference]: Start difference. First operand 2586 states and 9168 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:59,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:08:59,115 INFO L93 Difference]: Finished difference Result 4636 states and 15400 transitions. [2022-03-03 20:08:59,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-03 20:08:59,115 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:08:59,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:08:59,123 INFO L225 Difference]: With dead ends: 4636 [2022-03-03 20:08:59,123 INFO L226 Difference]: Without dead ends: 4598 [2022-03-03 20:08:59,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1415 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=739, Invalid=3953, Unknown=0, NotChecked=0, Total=4692 [2022-03-03 20:08:59,129 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 343 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:08:59,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 362 Invalid, 1686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1625 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 20:08:59,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4598 states. [2022-03-03 20:08:59,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4598 to 2592. [2022-03-03 20:08:59,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2591 states have (on average 3.5476649942107294) internal successors, (9192), 2591 states have internal predecessors, (9192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:59,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 9192 transitions. [2022-03-03 20:08:59,182 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 9192 transitions. Word has length 26 [2022-03-03 20:08:59,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:08:59,182 INFO L470 AbstractCegarLoop]: Abstraction has 2592 states and 9192 transitions. [2022-03-03 20:08:59,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:08:59,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 9192 transitions. [2022-03-03 20:08:59,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:08:59,186 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:08:59,186 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, 1] [2022-03-03 20:08:59,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-03 20:08:59,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:59,399 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:08:59,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:08:59,400 INFO L85 PathProgramCache]: Analyzing trace with hash 646760220, now seen corresponding path program 20 times [2022-03-03 20:08:59,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:08:59,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544915648] [2022-03-03 20:08:59,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:08:59,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:08:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:08:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:08:59,742 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:08:59,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544915648] [2022-03-03 20:08:59,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544915648] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:08:59,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919528190] [2022-03-03 20:08:59,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:08:59,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:08:59,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:08:59,743 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:08:59,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-03 20:08:59,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:08:59,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:08:59,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:08:59,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:00,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:09:00,106 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:09:00,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 73 [2022-03-03 20:09:00,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:00,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:01,803 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:09:01,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 355 treesize of output 269 [2022-03-03 20:09:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:11,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919528190] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:11,501 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:11,501 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:09:11,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688846794] [2022-03-03 20:09:11,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:11,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:09:11,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:11,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:09:11,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:09:11,502 INFO L87 Difference]: Start difference. First operand 2592 states and 9192 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:18,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:18,037 INFO L93 Difference]: Finished difference Result 4831 states and 15980 transitions. [2022-03-03 20:09:18,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 20:09:18,037 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:09:18,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:18,046 INFO L225 Difference]: With dead ends: 4831 [2022-03-03 20:09:18,047 INFO L226 Difference]: Without dead ends: 4766 [2022-03-03 20:09:18,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=813, Invalid=4737, Unknown=0, NotChecked=0, Total=5550 [2022-03-03 20:09:18,047 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 355 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:18,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 405 Invalid, 1848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1775 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-03 20:09:18,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4766 states. [2022-03-03 20:09:18,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4766 to 2606. [2022-03-03 20:09:18,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2606 states, 2605 states have (on average 3.5485604606525913) internal successors, (9244), 2605 states have internal predecessors, (9244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:18,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2606 states to 2606 states and 9244 transitions. [2022-03-03 20:09:18,104 INFO L78 Accepts]: Start accepts. Automaton has 2606 states and 9244 transitions. Word has length 26 [2022-03-03 20:09:18,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:18,104 INFO L470 AbstractCegarLoop]: Abstraction has 2606 states and 9244 transitions. [2022-03-03 20:09:18,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:18,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2606 states and 9244 transitions. [2022-03-03 20:09:18,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:09:18,108 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:18,108 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:18,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-03 20:09:18,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:18,323 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:09:18,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:18,324 INFO L85 PathProgramCache]: Analyzing trace with hash 902763630, now seen corresponding path program 37 times [2022-03-03 20:09:18,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:18,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852379497] [2022-03-03 20:09:18,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:18,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:18,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:18,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:18,964 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:18,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852379497] [2022-03-03 20:09:18,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852379497] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:18,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552424312] [2022-03-03 20:09:18,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:09:18,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:18,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:18,965 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:18,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-03 20:09:18,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:18,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:09:18,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:19,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:19,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:09:19,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:09:19,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:19,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 75 [2022-03-03 20:09:19,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:19,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:20,896 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:09:20,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 379 treesize of output 261 [2022-03-03 20:09:21,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:21,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552424312] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:21,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:21,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-03-03 20:09:21,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697891288] [2022-03-03 20:09:21,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:21,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:09:21,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:21,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:09:21,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:09:21,951 INFO L87 Difference]: Start difference. First operand 2606 states and 9244 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:25,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:25,144 INFO L93 Difference]: Finished difference Result 4288 states and 14482 transitions. [2022-03-03 20:09:25,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 20:09:25,145 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:09:25,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:25,154 INFO L225 Difference]: With dead ends: 4288 [2022-03-03 20:09:25,154 INFO L226 Difference]: Without dead ends: 4258 [2022-03-03 20:09:25,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=620, Invalid=3540, Unknown=0, NotChecked=0, Total=4160 [2022-03-03 20:09:25,155 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 241 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 1384 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:25,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 335 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1384 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 20:09:25,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4258 states. [2022-03-03 20:09:25,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4258 to 2632. [2022-03-03 20:09:25,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2632 states, 2631 states have (on average 3.5442797415431393) internal successors, (9325), 2631 states have internal predecessors, (9325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:25,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2632 states to 2632 states and 9325 transitions. [2022-03-03 20:09:25,212 INFO L78 Accepts]: Start accepts. Automaton has 2632 states and 9325 transitions. Word has length 26 [2022-03-03 20:09:25,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:25,212 INFO L470 AbstractCegarLoop]: Abstraction has 2632 states and 9325 transitions. [2022-03-03 20:09:25,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:25,212 INFO L276 IsEmpty]: Start isEmpty. Operand 2632 states and 9325 transitions. [2022-03-03 20:09:25,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:09:25,216 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:25,216 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:25,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-03 20:09:25,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-03 20:09:25,431 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:09:25,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:25,432 INFO L85 PathProgramCache]: Analyzing trace with hash 2020528988, now seen corresponding path program 38 times [2022-03-03 20:09:25,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:25,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803943519] [2022-03-03 20:09:25,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:25,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:26,001 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:26,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803943519] [2022-03-03 20:09:26,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803943519] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:26,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121937486] [2022-03-03 20:09:26,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:09:26,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:26,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:26,002 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:26,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-03 20:09:26,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:09:26,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:09:26,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 20:09:26,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:26,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:09:26,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:09:26,675 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:09:26,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 101 [2022-03-03 20:09:27,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:27,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:29,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:29,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:29,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:29,027 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:09:29,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 375 treesize of output 247 [2022-03-03 20:09:29,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:29,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121937486] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:29,584 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:29,584 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-03 20:09:29,584 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523179551] [2022-03-03 20:09:29,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:29,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:09:29,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:29,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:09:29,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:09:29,585 INFO L87 Difference]: Start difference. First operand 2632 states and 9325 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:40,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:40,178 INFO L93 Difference]: Finished difference Result 4411 states and 14783 transitions. [2022-03-03 20:09:40,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 20:09:40,178 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:09:40,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:40,186 INFO L225 Difference]: With dead ends: 4411 [2022-03-03 20:09:40,186 INFO L226 Difference]: Without dead ends: 4281 [2022-03-03 20:09:40,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1999 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=1055, Invalid=5107, Unknown=0, NotChecked=0, Total=6162 [2022-03-03 20:09:40,187 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 365 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:40,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 297 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1208 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 20:09:40,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4281 states. [2022-03-03 20:09:40,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4281 to 2686. [2022-03-03 20:09:40,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2686 states, 2685 states have (on average 3.527001862197393) internal successors, (9470), 2685 states have internal predecessors, (9470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:40,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2686 states to 2686 states and 9470 transitions. [2022-03-03 20:09:40,231 INFO L78 Accepts]: Start accepts. Automaton has 2686 states and 9470 transitions. Word has length 26 [2022-03-03 20:09:40,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:40,231 INFO L470 AbstractCegarLoop]: Abstraction has 2686 states and 9470 transitions. [2022-03-03 20:09:40,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:40,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2686 states and 9470 transitions. [2022-03-03 20:09:40,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:09:40,235 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:40,235 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:40,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-03 20:09:40,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-03-03 20:09:40,451 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:09:40,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:40,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1206563744, now seen corresponding path program 39 times [2022-03-03 20:09:40,451 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:40,451 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224522611] [2022-03-03 20:09:40,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:40,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:40,850 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:40,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224522611] [2022-03-03 20:09:40,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224522611] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:40,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146469985] [2022-03-03 20:09:40,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:09:40,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:40,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:40,851 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:40,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-03 20:09:40,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 20:09:40,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:09:40,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:09:40,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:41,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:41,721 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:09:41,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 109 treesize of output 99 [2022-03-03 20:09:43,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:43,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:47,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:09:47,651 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:09:47,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 267 treesize of output 217 [2022-03-03 20:09:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:48,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146469985] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:48,194 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:48,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 31 [2022-03-03 20:09:48,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902777674] [2022-03-03 20:09:48,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:48,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 20:09:48,194 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:48,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 20:09:48,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2022-03-03 20:09:48,195 INFO L87 Difference]: Start difference. First operand 2686 states and 9470 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:56,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:56,278 INFO L93 Difference]: Finished difference Result 5196 states and 17713 transitions. [2022-03-03 20:09:56,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-03 20:09:56,278 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:09:56,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:56,287 INFO L225 Difference]: With dead ends: 5196 [2022-03-03 20:09:56,287 INFO L226 Difference]: Without dead ends: 5181 [2022-03-03 20:09:56,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 32 SyntacticMatches, 13 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4132 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1855, Invalid=9275, Unknown=0, NotChecked=0, Total=11130 [2022-03-03 20:09:56,287 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 366 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 1451 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 2343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 777 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:56,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 426 Invalid, 2343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1451 Invalid, 0 Unknown, 777 Unchecked, 0.8s Time] [2022-03-03 20:09:56,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5181 states. [2022-03-03 20:09:56,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5181 to 2698. [2022-03-03 20:09:56,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2698 states, 2697 states have (on average 3.5231738969225064) internal successors, (9502), 2697 states have internal predecessors, (9502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:56,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2698 states to 2698 states and 9502 transitions. [2022-03-03 20:09:56,336 INFO L78 Accepts]: Start accepts. Automaton has 2698 states and 9502 transitions. Word has length 26 [2022-03-03 20:09:56,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:56,336 INFO L470 AbstractCegarLoop]: Abstraction has 2698 states and 9502 transitions. [2022-03-03 20:09:56,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:56,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2698 states and 9502 transitions. [2022-03-03 20:09:56,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:09:56,340 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:56,340 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:56,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-03 20:09:56,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-03-03 20:09:56,556 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:09:56,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:56,556 INFO L85 PathProgramCache]: Analyzing trace with hash 267653912, now seen corresponding path program 40 times [2022-03-03 20:09:56,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:56,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212444269] [2022-03-03 20:09:56,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:56,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:57,009 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:57,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:57,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212444269] [2022-03-03 20:09:57,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212444269] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:57,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70799136] [2022-03-03 20:09:57,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:09:57,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:57,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:57,010 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:57,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-03 20:09:57,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:09:57,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:09:57,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:09:57,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:57,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:09:57,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:09:57,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:57,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:09:57,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 75 [2022-03-03 20:09:57,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:57,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:58,918 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:09:58,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 363 treesize of output 245 [2022-03-03 20:10:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:00,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70799136] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:10:00,033 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:10:00,033 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-03-03 20:10:00,033 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183279143] [2022-03-03 20:10:00,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:10:00,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:10:00,034 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:10:00,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:10:00,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:10:00,034 INFO L87 Difference]: Start difference. First operand 2698 states and 9502 transitions. Second operand has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:05,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:10:05,139 INFO L93 Difference]: Finished difference Result 4478 states and 15012 transitions. [2022-03-03 20:10:05,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-03 20:10:05,139 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:10:05,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:10:05,147 INFO L225 Difference]: With dead ends: 4478 [2022-03-03 20:10:05,147 INFO L226 Difference]: Without dead ends: 4448 [2022-03-03 20:10:05,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2242 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=926, Invalid=5880, Unknown=0, NotChecked=0, Total=6806 [2022-03-03 20:10:05,147 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 251 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 2122 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 2278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:10:05,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 539 Invalid, 2278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2122 Invalid, 0 Unknown, 64 Unchecked, 1.1s Time] [2022-03-03 20:10:05,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4448 states. [2022-03-03 20:10:05,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4448 to 2732. [2022-03-03 20:10:05,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2732 states, 2731 states have (on average 3.5140974002196996) internal successors, (9597), 2731 states have internal predecessors, (9597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:05,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2732 states to 2732 states and 9597 transitions. [2022-03-03 20:10:05,196 INFO L78 Accepts]: Start accepts. Automaton has 2732 states and 9597 transitions. Word has length 26 [2022-03-03 20:10:05,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:10:05,196 INFO L470 AbstractCegarLoop]: Abstraction has 2732 states and 9597 transitions. [2022-03-03 20:10:05,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:05,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2732 states and 9597 transitions. [2022-03-03 20:10:05,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:10:05,200 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:10:05,200 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:10:05,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-03 20:10:05,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:05,415 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:10:05,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:10:05,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1794939168, now seen corresponding path program 21 times [2022-03-03 20:10:05,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:10:05,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017056317] [2022-03-03 20:10:05,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:10:05,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:10:05,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:10:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:06,129 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:10:06,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017056317] [2022-03-03 20:10:06,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017056317] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:10:06,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639862454] [2022-03-03 20:10:06,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:10:06,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:06,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:10:06,131 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:10:06,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-03 20:10:06,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:10:06,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:10:06,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:10:06,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:10:07,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:10:07,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:10:07,203 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 109 treesize of output 75 [2022-03-03 20:10:07,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:07,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:10:08,537 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:10:08,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 379 treesize of output 313 [2022-03-03 20:10:33,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:33,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639862454] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:10:33,768 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:10:33,768 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:10:33,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26976981] [2022-03-03 20:10:33,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:10:33,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:10:33,768 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:10:33,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:10:33,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:10:33,772 INFO L87 Difference]: Start difference. First operand 2732 states and 9597 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:39,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:10:39,101 INFO L93 Difference]: Finished difference Result 5708 states and 18244 transitions. [2022-03-03 20:10:39,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-03 20:10:39,101 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:10:39,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:10:39,111 INFO L225 Difference]: With dead ends: 5708 [2022-03-03 20:10:39,111 INFO L226 Difference]: Without dead ends: 5678 [2022-03-03 20:10:39,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1064, Invalid=4048, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 20:10:39,112 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 427 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 433 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:10:39,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 327 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 911 Invalid, 0 Unknown, 433 Unchecked, 0.7s Time] [2022-03-03 20:10:39,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5678 states. [2022-03-03 20:10:39,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5678 to 2778. [2022-03-03 20:10:39,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2778 states, 2777 states have (on average 3.5235866042491897) internal successors, (9785), 2777 states have internal predecessors, (9785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:39,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2778 states to 2778 states and 9785 transitions. [2022-03-03 20:10:39,167 INFO L78 Accepts]: Start accepts. Automaton has 2778 states and 9785 transitions. Word has length 26 [2022-03-03 20:10:39,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:10:39,168 INFO L470 AbstractCegarLoop]: Abstraction has 2778 states and 9785 transitions. [2022-03-03 20:10:39,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:39,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2778 states and 9785 transitions. [2022-03-03 20:10:39,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:10:39,171 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:10:39,171 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, 1] [2022-03-03 20:10:39,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-03 20:10:39,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:39,387 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:10:39,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:10:39,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1006120406, now seen corresponding path program 22 times [2022-03-03 20:10:39,387 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:10:39,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073552311] [2022-03-03 20:10:39,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:10:39,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:10:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:10:40,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:40,063 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:10:40,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073552311] [2022-03-03 20:10:40,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073552311] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:10:40,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113949094] [2022-03-03 20:10:40,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:10:40,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:40,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:10:40,064 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:10:40,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-03 20:10:40,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:10:40,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:10:40,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 20:10:40,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:10:40,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:10:40,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:10:40,620 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 109 treesize of output 75 [2022-03-03 20:10:40,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:40,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:10:41,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:10:41,691 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:10:41,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 339 treesize of output 261 [2022-03-03 20:10:45,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:45,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113949094] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:10:45,221 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:10:45,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:10:45,221 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970414060] [2022-03-03 20:10:45,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:10:45,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:10:45,221 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:10:45,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:10:45,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:10:45,222 INFO L87 Difference]: Start difference. First operand 2778 states and 9785 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:52,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:10:52,006 INFO L93 Difference]: Finished difference Result 6015 states and 19169 transitions. [2022-03-03 20:10:52,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 20:10:52,006 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:10:52,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:10:52,029 INFO L225 Difference]: With dead ends: 6015 [2022-03-03 20:10:52,029 INFO L226 Difference]: Without dead ends: 5985 [2022-03-03 20:10:52,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1762 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1161, Invalid=4095, Unknown=0, NotChecked=0, Total=5256 [2022-03-03 20:10:52,030 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 517 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 1624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:10:52,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 412 Invalid, 1624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1357 Invalid, 0 Unknown, 176 Unchecked, 0.9s Time] [2022-03-03 20:10:52,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5985 states. [2022-03-03 20:10:52,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5985 to 2823. [2022-03-03 20:10:52,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2823 states, 2822 states have (on average 3.5240963855421685) internal successors, (9945), 2822 states have internal predecessors, (9945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:52,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2823 states to 2823 states and 9945 transitions. [2022-03-03 20:10:52,107 INFO L78 Accepts]: Start accepts. Automaton has 2823 states and 9945 transitions. Word has length 26 [2022-03-03 20:10:52,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:10:52,107 INFO L470 AbstractCegarLoop]: Abstraction has 2823 states and 9945 transitions. [2022-03-03 20:10:52,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:52,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2823 states and 9945 transitions. [2022-03-03 20:10:52,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:10:52,111 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:10:52,111 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, 1] [2022-03-03 20:10:52,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-03 20:10:52,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-03 20:10:52,328 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:10:52,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:10:52,328 INFO L85 PathProgramCache]: Analyzing trace with hash -205068792, now seen corresponding path program 23 times [2022-03-03 20:10:52,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:10:52,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91024187] [2022-03-03 20:10:52,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:10:52,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:10:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:10:52,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:52,905 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:10:52,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91024187] [2022-03-03 20:10:52,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91024187] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:10:52,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115912068] [2022-03-03 20:10:52,905 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:10:52,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:52,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:10:52,912 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:10:52,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-03 20:10:52,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:10:52,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:10:52,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:10:52,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:10:53,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:10:53,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:10:53,635 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 109 treesize of output 75 [2022-03-03 20:10:53,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:53,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:10:54,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:10:54,985 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:10:54,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 339 treesize of output 261 [2022-03-03 20:10:59,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:59,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115912068] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:10:59,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:10:59,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-03 20:10:59,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983497164] [2022-03-03 20:10:59,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:10:59,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:10:59,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:10:59,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:10:59,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:10:59,318 INFO L87 Difference]: Start difference. First operand 2823 states and 9945 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:11:06,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:11:06,975 INFO L93 Difference]: Finished difference Result 6000 states and 19520 transitions. [2022-03-03 20:11:06,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 20:11:06,976 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:11:06,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:11:06,987 INFO L225 Difference]: With dead ends: 6000 [2022-03-03 20:11:06,987 INFO L226 Difference]: Without dead ends: 5963 [2022-03-03 20:11:06,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=831, Invalid=3725, Unknown=0, NotChecked=0, Total=4556 [2022-03-03 20:11:06,992 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 314 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 527 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:11:06,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 425 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 811 Invalid, 0 Unknown, 527 Unchecked, 0.6s Time] [2022-03-03 20:11:06,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5963 states. [2022-03-03 20:11:07,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5963 to 2886. [2022-03-03 20:11:07,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2886 states, 2885 states have (on average 3.5351819757365686) internal successors, (10199), 2885 states have internal predecessors, (10199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:11:07,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2886 states to 2886 states and 10199 transitions. [2022-03-03 20:11:07,054 INFO L78 Accepts]: Start accepts. Automaton has 2886 states and 10199 transitions. Word has length 26 [2022-03-03 20:11:07,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:11:07,054 INFO L470 AbstractCegarLoop]: Abstraction has 2886 states and 10199 transitions. [2022-03-03 20:11:07,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:11:07,054 INFO L276 IsEmpty]: Start isEmpty. Operand 2886 states and 10199 transitions. [2022-03-03 20:11:07,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:11:07,058 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:11:07,058 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, 1] [2022-03-03 20:11:07,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-03 20:11:07,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-03-03 20:11:07,271 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:11:07,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:11:07,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1698976514, now seen corresponding path program 24 times [2022-03-03 20:11:07,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:11:07,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774374003] [2022-03-03 20:11:07,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:11:07,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:11:07,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:11:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:07,682 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:11:07,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774374003] [2022-03-03 20:11:07,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774374003] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:11:07,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052580598] [2022-03-03 20:11:07,684 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:11:07,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:11:07,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:11:07,685 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:11:07,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-03 20:11:07,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:11:07,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:11:07,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 20:11:07,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:11:08,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:11:08,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:11:08,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:11:08,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:08,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:11:10,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:11:10,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:11:10,041 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:11:10,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 339 treesize of output 253 [2022-03-03 20:11:11,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:11,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052580598] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:11:11,524 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:11:11,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-03 20:11:11,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331893705] [2022-03-03 20:11:11,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:11:11,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:11:11,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:11:11,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:11:11,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:11:11,525 INFO L87 Difference]: Start difference. First operand 2886 states and 10199 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:11:23,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:11:23,393 INFO L93 Difference]: Finished difference Result 7128 states and 23544 transitions. [2022-03-03 20:11:23,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-03-03 20:11:23,394 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:11:23,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:11:23,407 INFO L225 Difference]: With dead ends: 7128 [2022-03-03 20:11:23,407 INFO L226 Difference]: Without dead ends: 7083 [2022-03-03 20:11:23,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7413 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=2744, Invalid=15346, Unknown=0, NotChecked=0, Total=18090 [2022-03-03 20:11:23,409 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 611 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 1683 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 2977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1189 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:11:23,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [611 Valid, 788 Invalid, 2977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1683 Invalid, 0 Unknown, 1189 Unchecked, 1.1s Time] [2022-03-03 20:11:23,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7083 states. [2022-03-03 20:11:23,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7083 to 2926. [2022-03-03 20:11:23,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2926 states, 2925 states have (on average 3.545299145299145) internal successors, (10370), 2925 states have internal predecessors, (10370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:11:23,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2926 states to 2926 states and 10370 transitions. [2022-03-03 20:11:23,485 INFO L78 Accepts]: Start accepts. Automaton has 2926 states and 10370 transitions. Word has length 26 [2022-03-03 20:11:23,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:11:23,485 INFO L470 AbstractCegarLoop]: Abstraction has 2926 states and 10370 transitions. [2022-03-03 20:11:23,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:11:23,485 INFO L276 IsEmpty]: Start isEmpty. Operand 2926 states and 10370 transitions. [2022-03-03 20:11:23,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:11:23,503 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:11:23,503 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, 1] [2022-03-03 20:11:23,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-03 20:11:23,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:11:23,719 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:11:23,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:11:23,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1822601572, now seen corresponding path program 25 times [2022-03-03 20:11:23,719 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:11:23,719 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235651288] [2022-03-03 20:11:23,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:11:23,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:11:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:11:23,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:23,986 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:11:23,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235651288] [2022-03-03 20:11:23,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235651288] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:11:23,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384191557] [2022-03-03 20:11:23,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:11:23,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:11:23,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:11:23,987 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:11:23,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-03 20:11:24,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:11:24,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 20:11:24,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:11:24,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:11:24,342 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:11:24,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:11:24,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:24,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:11:25,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:11:25,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:11:25,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 343 treesize of output 265 [2022-03-03 20:11:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:29,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384191557] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:11:29,453 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:11:29,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:11:29,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264990184] [2022-03-03 20:11:29,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:11:29,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:11:29,454 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:11:29,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:11:29,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:11:29,454 INFO L87 Difference]: Start difference. First operand 2926 states and 10370 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:11:40,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:11:40,020 INFO L93 Difference]: Finished difference Result 6606 states and 21211 transitions. [2022-03-03 20:11:40,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-03 20:11:40,020 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:11:40,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:11:40,033 INFO L225 Difference]: With dead ends: 6606 [2022-03-03 20:11:40,033 INFO L226 Difference]: Without dead ends: 6553 [2022-03-03 20:11:40,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2534 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=1566, Invalid=5406, Unknown=0, NotChecked=0, Total=6972 [2022-03-03 20:11:40,034 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 617 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 1842 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:11:40,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 607 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1842 Invalid, 0 Unknown, 236 Unchecked, 1.3s Time] [2022-03-03 20:11:40,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6553 states. [2022-03-03 20:11:40,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6553 to 2929. [2022-03-03 20:11:40,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2929 states, 2928 states have (on average 3.5474726775956285) internal successors, (10387), 2928 states have internal predecessors, (10387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:11:40,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2929 states to 2929 states and 10387 transitions. [2022-03-03 20:11:40,149 INFO L78 Accepts]: Start accepts. Automaton has 2929 states and 10387 transitions. Word has length 26 [2022-03-03 20:11:40,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:11:40,149 INFO L470 AbstractCegarLoop]: Abstraction has 2929 states and 10387 transitions. [2022-03-03 20:11:40,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:11:40,149 INFO L276 IsEmpty]: Start isEmpty. Operand 2929 states and 10387 transitions. [2022-03-03 20:11:40,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:11:40,154 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:11:40,154 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, 1] [2022-03-03 20:11:40,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-03 20:11:40,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-03 20:11:40,370 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:11:40,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:11:40,371 INFO L85 PathProgramCache]: Analyzing trace with hash -629380028, now seen corresponding path program 26 times [2022-03-03 20:11:40,371 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:11:40,371 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206062040] [2022-03-03 20:11:40,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:11:40,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:11:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:11:40,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:40,829 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:11:40,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206062040] [2022-03-03 20:11:40,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206062040] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:11:40,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19708118] [2022-03-03 20:11:40,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:11:40,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:11:40,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:11:40,831 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:11:40,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-03 20:11:40,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:11:40,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:11:40,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:11:40,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:11:41,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:11:41,508 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:11:41,508 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 147 treesize of output 115 [2022-03-03 20:11:43,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:43,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:11:44,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:11:44,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:11:44,740 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:11:44,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 339 treesize of output 253 [2022-03-03 20:11:46,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:46,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19708118] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:11:46,623 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:11:46,623 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-03 20:11:46,623 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771267682] [2022-03-03 20:11:46,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:11:46,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:11:46,623 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:11:46,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:11:46,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:11:46,624 INFO L87 Difference]: Start difference. First operand 2929 states and 10387 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:01,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:12:01,747 INFO L93 Difference]: Finished difference Result 6603 states and 21763 transitions. [2022-03-03 20:12:01,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-03 20:12:01,747 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:12:01,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:12:01,777 INFO L225 Difference]: With dead ends: 6603 [2022-03-03 20:12:01,777 INFO L226 Difference]: Without dead ends: 6558 [2022-03-03 20:12:01,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5436 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=2378, Invalid=12384, Unknown=0, NotChecked=0, Total=14762 [2022-03-03 20:12:01,778 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 585 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 1854 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 2264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:12:01,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [585 Valid, 699 Invalid, 2264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1854 Invalid, 0 Unknown, 317 Unchecked, 1.2s Time] [2022-03-03 20:12:01,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6558 states. [2022-03-03 20:12:01,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6558 to 2942. [2022-03-03 20:12:01,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2942 states, 2941 states have (on average 3.551513090785447) internal successors, (10445), 2941 states have internal predecessors, (10445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:01,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2942 states to 2942 states and 10445 transitions. [2022-03-03 20:12:01,841 INFO L78 Accepts]: Start accepts. Automaton has 2942 states and 10445 transitions. Word has length 26 [2022-03-03 20:12:01,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:12:01,841 INFO L470 AbstractCegarLoop]: Abstraction has 2942 states and 10445 transitions. [2022-03-03 20:12:01,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:01,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2942 states and 10445 transitions. [2022-03-03 20:12:01,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:12:01,845 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:12:01,845 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, 1] [2022-03-03 20:12:01,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-03 20:12:02,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-03 20:12:02,047 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:12:02,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:12:02,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1679960728, now seen corresponding path program 27 times [2022-03-03 20:12:02,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:12:02,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582019356] [2022-03-03 20:12:02,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:12:02,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:12:02,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:12:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:02,452 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:12:02,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582019356] [2022-03-03 20:12:02,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582019356] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:12:02,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610417859] [2022-03-03 20:12:02,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:12:02,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:12:02,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:12:02,454 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:12:02,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-03 20:12:02,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:12:02,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:12:02,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:12:02,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:12:02,917 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:12:02,917 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 109 treesize of output 91 [2022-03-03 20:12:04,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:04,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:12:05,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:12:05,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:12:05,304 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:12:05,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 339 treesize of output 253 [2022-03-03 20:12:07,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:07,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610417859] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:12:07,016 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:12:07,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-03-03 20:12:07,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558912788] [2022-03-03 20:12:07,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:12:07,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:12:07,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:12:07,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:12:07,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:12:07,016 INFO L87 Difference]: Start difference. First operand 2942 states and 10445 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:20,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:12:20,749 INFO L93 Difference]: Finished difference Result 6795 states and 22452 transitions. [2022-03-03 20:12:20,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-03 20:12:20,749 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:12:20,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:12:20,762 INFO L225 Difference]: With dead ends: 6795 [2022-03-03 20:12:20,762 INFO L226 Difference]: Without dead ends: 6751 [2022-03-03 20:12:20,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3368 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=1843, Invalid=8459, Unknown=0, NotChecked=0, Total=10302 [2022-03-03 20:12:20,763 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 637 mSDsluCounter, 979 mSDsCounter, 0 mSdLazyCounter, 1559 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 2509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 824 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:12:20,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [637 Valid, 589 Invalid, 2509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1559 Invalid, 0 Unknown, 824 Unchecked, 1.1s Time] [2022-03-03 20:12:20,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6751 states. [2022-03-03 20:12:20,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6751 to 2937. [2022-03-03 20:12:20,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2937 states, 2936 states have (on average 3.5497275204359675) internal successors, (10422), 2936 states have internal predecessors, (10422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:20,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2937 states to 2937 states and 10422 transitions. [2022-03-03 20:12:20,853 INFO L78 Accepts]: Start accepts. Automaton has 2937 states and 10422 transitions. Word has length 26 [2022-03-03 20:12:20,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:12:20,853 INFO L470 AbstractCegarLoop]: Abstraction has 2937 states and 10422 transitions. [2022-03-03 20:12:20,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:20,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2937 states and 10422 transitions. [2022-03-03 20:12:20,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:12:20,857 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:12:20,857 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, 1] [2022-03-03 20:12:20,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-03 20:12:21,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-03 20:12:21,071 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:12:21,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:12:21,072 INFO L85 PathProgramCache]: Analyzing trace with hash 358111584, now seen corresponding path program 28 times [2022-03-03 20:12:21,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:12:21,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561752147] [2022-03-03 20:12:21,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:12:21,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:12:21,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:12:21,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:21,420 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:12:21,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561752147] [2022-03-03 20:12:21,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561752147] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:12:21,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261471053] [2022-03-03 20:12:21,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:12:21,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:12:21,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:12:21,421 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:12:21,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-03 20:12:21,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:12:21,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:12:21,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:12:21,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:12:21,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:12:21,860 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:12:21,860 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 89 treesize of output 81 [2022-03-03 20:12:23,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:23,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:12:24,044 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:12:24,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 323 treesize of output 273 [2022-03-03 20:12:44,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:44,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261471053] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:12:44,726 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:12:44,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:12:44,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260036278] [2022-03-03 20:12:44,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:12:44,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:12:44,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:12:44,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:12:44,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:12:44,727 INFO L87 Difference]: Start difference. First operand 2937 states and 10422 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:51,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:12:51,980 INFO L93 Difference]: Finished difference Result 5768 states and 18790 transitions. [2022-03-03 20:12:51,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-03 20:12:51,980 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:12:51,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:12:51,990 INFO L225 Difference]: With dead ends: 5768 [2022-03-03 20:12:51,990 INFO L226 Difference]: Without dead ends: 5688 [2022-03-03 20:12:51,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1190, Invalid=5452, Unknown=0, NotChecked=0, Total=6642 [2022-03-03 20:12:51,991 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 427 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:12:51,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 382 Invalid, 1597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1282 Invalid, 0 Unknown, 241 Unchecked, 0.8s Time] [2022-03-03 20:12:51,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5688 states. [2022-03-03 20:12:52,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5688 to 2944. [2022-03-03 20:12:52,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2944 states, 2943 states have (on average 3.550118926265715) internal successors, (10448), 2943 states have internal predecessors, (10448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:52,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2944 states to 2944 states and 10448 transitions. [2022-03-03 20:12:52,070 INFO L78 Accepts]: Start accepts. Automaton has 2944 states and 10448 transitions. Word has length 26 [2022-03-03 20:12:52,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:12:52,070 INFO L470 AbstractCegarLoop]: Abstraction has 2944 states and 10448 transitions. [2022-03-03 20:12:52,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:52,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2944 states and 10448 transitions. [2022-03-03 20:12:52,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:12:52,074 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:12:52,075 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:12:52,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-03 20:12:52,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2022-03-03 20:12:52,287 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:12:52,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:12:52,288 INFO L85 PathProgramCache]: Analyzing trace with hash 611956416, now seen corresponding path program 41 times [2022-03-03 20:12:52,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:12:52,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961060521] [2022-03-03 20:12:52,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:12:52,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:12:52,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:12:52,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:52,673 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:12:52,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961060521] [2022-03-03 20:12:52,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961060521] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:12:52,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124239483] [2022-03-03 20:12:52,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:12:52,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:12:52,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:12:52,688 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:12:52,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-03 20:12:52,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:12:52,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:12:52,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:12:52,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:12:53,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:12:53,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:12:53,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:12:53,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:12:53,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 75 [2022-03-03 20:12:53,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:53,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:12:54,203 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:12:54,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 375 treesize of output 253 [2022-03-03 20:12:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:54,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124239483] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:12:54,893 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:12:54,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-03-03 20:12:54,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256366570] [2022-03-03 20:12:54,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:12:54,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:12:54,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:12:54,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:12:54,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:12:54,894 INFO L87 Difference]: Start difference. First operand 2944 states and 10448 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:00,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:13:00,161 INFO L93 Difference]: Finished difference Result 4953 states and 16689 transitions. [2022-03-03 20:13:00,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-03 20:13:00,162 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:13:00,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:13:00,171 INFO L225 Difference]: With dead ends: 4953 [2022-03-03 20:13:00,171 INFO L226 Difference]: Without dead ends: 4859 [2022-03-03 20:13:00,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2777 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1157, Invalid=6853, Unknown=0, NotChecked=0, Total=8010 [2022-03-03 20:13:00,172 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 326 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 2077 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 2157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:13:00,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 459 Invalid, 2157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2077 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 20:13:00,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4859 states. [2022-03-03 20:13:00,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4859 to 2959. [2022-03-03 20:13:00,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2959 states, 2958 states have (on average 3.555104800540906) internal successors, (10516), 2958 states have internal predecessors, (10516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:00,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2959 states to 2959 states and 10516 transitions. [2022-03-03 20:13:00,251 INFO L78 Accepts]: Start accepts. Automaton has 2959 states and 10516 transitions. Word has length 26 [2022-03-03 20:13:00,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:13:00,251 INFO L470 AbstractCegarLoop]: Abstraction has 2959 states and 10516 transitions. [2022-03-03 20:13:00,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:00,251 INFO L276 IsEmpty]: Start isEmpty. Operand 2959 states and 10516 transitions. [2022-03-03 20:13:00,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:13:00,255 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:13:00,255 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:13:00,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-03 20:13:00,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:13:00,470 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:13:00,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:13:00,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1457232352, now seen corresponding path program 42 times [2022-03-03 20:13:00,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:13:00,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704665967] [2022-03-03 20:13:00,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:13:00,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:13:00,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:13:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:00,839 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:13:00,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704665967] [2022-03-03 20:13:00,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704665967] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:13:00,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960059070] [2022-03-03 20:13:00,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:13:00,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:13:00,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:13:00,841 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:13:00,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-03 20:13:00,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 20:13:00,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:13:00,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:13:00,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:13:01,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:13:01,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:13:01,276 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:13:01,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 101 [2022-03-03 20:13:01,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:01,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:13:02,769 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:13:02,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 371 treesize of output 253 [2022-03-03 20:13:04,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:04,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960059070] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:13:04,265 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:13:04,265 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 25 [2022-03-03 20:13:04,265 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691708843] [2022-03-03 20:13:04,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:13:04,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:13:04,265 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:13:04,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:13:04,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:13:04,265 INFO L87 Difference]: Start difference. First operand 2959 states and 10516 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:24,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:13:24,788 INFO L93 Difference]: Finished difference Result 6950 states and 23233 transitions. [2022-03-03 20:13:24,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2022-03-03 20:13:24,788 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:13:24,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:13:24,800 INFO L225 Difference]: With dead ends: 6950 [2022-03-03 20:13:24,800 INFO L226 Difference]: Without dead ends: 6903 [2022-03-03 20:13:24,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13336 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=5026, Invalid=26836, Unknown=0, NotChecked=0, Total=31862 [2022-03-03 20:13:24,801 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 623 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 2652 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 2830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 2652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:13:24,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 658 Invalid, 2830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 2652 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-03 20:13:24,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6903 states. [2022-03-03 20:13:24,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6903 to 3069. [2022-03-03 20:13:24,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3069 states, 3068 states have (on average 3.555410691003911) internal successors, (10908), 3068 states have internal predecessors, (10908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:24,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3069 states to 3069 states and 10908 transitions. [2022-03-03 20:13:24,867 INFO L78 Accepts]: Start accepts. Automaton has 3069 states and 10908 transitions. Word has length 26 [2022-03-03 20:13:24,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:13:24,867 INFO L470 AbstractCegarLoop]: Abstraction has 3069 states and 10908 transitions. [2022-03-03 20:13:24,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:24,867 INFO L276 IsEmpty]: Start isEmpty. Operand 3069 states and 10908 transitions. [2022-03-03 20:13:24,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:13:24,871 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:13:24,871 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:13:24,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-03 20:13:25,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:13:25,087 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:13:25,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:13:25,087 INFO L85 PathProgramCache]: Analyzing trace with hash 692947996, now seen corresponding path program 43 times [2022-03-03 20:13:25,087 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:13:25,087 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724337237] [2022-03-03 20:13:25,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:13:25,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:13:25,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:13:25,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:25,489 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:13:25,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724337237] [2022-03-03 20:13:25,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724337237] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:13:25,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47654603] [2022-03-03 20:13:25,489 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:13:25,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:13:25,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:13:25,490 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:13:25,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-03 20:13:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:13:25,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:13:25,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:13:25,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:13:25,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:13:25,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:13:25,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:13:25,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 75 [2022-03-03 20:13:26,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:26,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:13:27,025 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:13:27,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 371 treesize of output 253 [2022-03-03 20:13:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:27,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47654603] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:13:27,970 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:13:27,970 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-03-03 20:13:27,970 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955346343] [2022-03-03 20:13:27,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:13:27,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:13:27,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:13:27,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:13:27,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:13:27,971 INFO L87 Difference]: Start difference. First operand 3069 states and 10908 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:39,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:13:39,299 INFO L93 Difference]: Finished difference Result 6077 states and 20280 transitions. [2022-03-03 20:13:39,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-03 20:13:39,300 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:13:39,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:13:39,311 INFO L225 Difference]: With dead ends: 6077 [2022-03-03 20:13:39,311 INFO L226 Difference]: Without dead ends: 6047 [2022-03-03 20:13:39,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6025 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=2566, Invalid=12934, Unknown=0, NotChecked=0, Total=15500 [2022-03-03 20:13:39,312 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 541 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 2414 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 2716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 2414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:13:39,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 625 Invalid, 2716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 2414 Invalid, 0 Unknown, 100 Unchecked, 1.2s Time] [2022-03-03 20:13:39,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6047 states. [2022-03-03 20:13:39,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6047 to 3077. [2022-03-03 20:13:39,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3077 states, 3076 states have (on average 3.5578673602080624) internal successors, (10944), 3076 states have internal predecessors, (10944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:39,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3077 states to 3077 states and 10944 transitions. [2022-03-03 20:13:39,376 INFO L78 Accepts]: Start accepts. Automaton has 3077 states and 10944 transitions. Word has length 26 [2022-03-03 20:13:39,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:13:39,376 INFO L470 AbstractCegarLoop]: Abstraction has 3077 states and 10944 transitions. [2022-03-03 20:13:39,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:39,376 INFO L276 IsEmpty]: Start isEmpty. Operand 3077 states and 10944 transitions. [2022-03-03 20:13:39,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:13:39,380 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:13:39,380 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, 1] [2022-03-03 20:13:39,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-03 20:13:39,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:13:39,596 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:13:39,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:13:39,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1196537974, now seen corresponding path program 29 times [2022-03-03 20:13:39,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:13:39,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793626285] [2022-03-03 20:13:39,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:13:39,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:13:39,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:13:40,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:40,126 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:13:40,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793626285] [2022-03-03 20:13:40,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793626285] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:13:40,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398615950] [2022-03-03 20:13:40,127 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:13:40,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:13:40,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:13:40,136 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:13:40,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-03 20:13:40,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:13:40,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:13:40,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:13:40,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:13:40,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:13:40,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:13:40,755 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 109 treesize of output 75 [2022-03-03 20:13:40,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:40,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:13:42,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:13:42,033 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:13:42,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 459 treesize of output 333 [2022-03-03 20:13:53,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:53,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398615950] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:13:53,322 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:13:53,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:13:53,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681362875] [2022-03-03 20:13:53,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:13:53,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:13:53,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:13:53,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:13:53,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:13:53,323 INFO L87 Difference]: Start difference. First operand 3077 states and 10944 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:58,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:13:58,644 INFO L93 Difference]: Finished difference Result 5768 states and 18888 transitions. [2022-03-03 20:13:58,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-03 20:13:58,644 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:13:58,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:13:58,655 INFO L225 Difference]: With dead ends: 5768 [2022-03-03 20:13:58,655 INFO L226 Difference]: Without dead ends: 5726 [2022-03-03 20:13:58,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=845, Invalid=3577, Unknown=0, NotChecked=0, Total=4422 [2022-03-03 20:13:58,655 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 394 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 352 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:13:58,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 332 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 908 Invalid, 0 Unknown, 352 Unchecked, 0.7s Time] [2022-03-03 20:13:58,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5726 states. [2022-03-03 20:13:58,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5726 to 3062. [2022-03-03 20:13:58,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3062 states, 3061 states have (on average 3.5583142763802678) internal successors, (10892), 3061 states have internal predecessors, (10892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:58,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3062 states to 3062 states and 10892 transitions. [2022-03-03 20:13:58,718 INFO L78 Accepts]: Start accepts. Automaton has 3062 states and 10892 transitions. Word has length 26 [2022-03-03 20:13:58,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:13:58,718 INFO L470 AbstractCegarLoop]: Abstraction has 3062 states and 10892 transitions. [2022-03-03 20:13:58,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:58,718 INFO L276 IsEmpty]: Start isEmpty. Operand 3062 states and 10892 transitions. [2022-03-03 20:13:58,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:13:58,722 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:13:58,722 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, 1] [2022-03-03 20:13:58,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-03 20:13:58,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-03-03 20:13:58,938 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:13:58,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:13:58,938 INFO L85 PathProgramCache]: Analyzing trace with hash 2048965000, now seen corresponding path program 30 times [2022-03-03 20:13:58,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:13:58,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194329096] [2022-03-03 20:13:58,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:13:58,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:13:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:13:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:59,263 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:13:59,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194329096] [2022-03-03 20:13:59,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194329096] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:13:59,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853868684] [2022-03-03 20:13:59,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:13:59,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:13:59,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:13:59,265 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:13:59,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-03 20:13:59,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:13:59,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:13:59,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:13:59,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:00,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:14:00,043 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:14:00,043 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 109 treesize of output 91 [2022-03-03 20:14:03,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:03,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:04,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:14:04,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:14:04,206 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:14:04,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 323 treesize of output 257 [2022-03-03 20:14:06,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:06,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853868684] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:06,286 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:06,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-03 20:14:06,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163959353] [2022-03-03 20:14:06,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:06,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:14:06,286 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:06,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:14:06,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:14:06,287 INFO L87 Difference]: Start difference. First operand 3062 states and 10892 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:26,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:26,169 INFO L93 Difference]: Finished difference Result 7896 states and 26894 transitions. [2022-03-03 20:14:26,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-03-03 20:14:26,169 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:14:26,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:26,185 INFO L225 Difference]: With dead ends: 7896 [2022-03-03 20:14:26,185 INFO L226 Difference]: Without dead ends: 7882 [2022-03-03 20:14:26,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8919 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=2911, Invalid=19739, Unknown=0, NotChecked=0, Total=22650 [2022-03-03 20:14:26,186 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 496 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 1670 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 2090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 329 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:26,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 660 Invalid, 2090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1670 Invalid, 0 Unknown, 329 Unchecked, 1.2s Time] [2022-03-03 20:14:26,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7882 states. [2022-03-03 20:14:26,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7882 to 3144. [2022-03-03 20:14:26,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3144 states, 3143 states have (on average 3.5625198854597517) internal successors, (11197), 3143 states have internal predecessors, (11197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:26,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3144 states to 3144 states and 11197 transitions. [2022-03-03 20:14:26,268 INFO L78 Accepts]: Start accepts. Automaton has 3144 states and 11197 transitions. Word has length 26 [2022-03-03 20:14:26,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:26,268 INFO L470 AbstractCegarLoop]: Abstraction has 3144 states and 11197 transitions. [2022-03-03 20:14:26,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:26,268 INFO L276 IsEmpty]: Start isEmpty. Operand 3144 states and 11197 transitions. [2022-03-03 20:14:26,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:14:26,273 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:26,273 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:14:26,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-03 20:14:26,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:26,487 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:26,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:26,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1151910708, now seen corresponding path program 31 times [2022-03-03 20:14:26,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:26,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548156147] [2022-03-03 20:14:26,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:26,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:26,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:26,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:26,768 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:26,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548156147] [2022-03-03 20:14:26,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548156147] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:26,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380030057] [2022-03-03 20:14:26,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:14:26,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:26,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:26,769 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:26,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-03 20:14:26,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:26,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 20:14:26,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:27,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:14:27,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:14:27,174 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 109 treesize of output 75 [2022-03-03 20:14:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:27,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:28,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:14:28,095 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:14:28,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 343 treesize of output 269 [2022-03-03 20:14:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:31,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380030057] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:31,702 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:31,702 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:14:31,702 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097449741] [2022-03-03 20:14:31,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:31,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:14:31,703 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:31,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:14:31,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:14:31,703 INFO L87 Difference]: Start difference. First operand 3144 states and 11197 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:34,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:34,923 INFO L93 Difference]: Finished difference Result 4790 states and 16085 transitions. [2022-03-03 20:14:34,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-03 20:14:34,924 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:14:34,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:34,932 INFO L225 Difference]: With dead ends: 4790 [2022-03-03 20:14:34,932 INFO L226 Difference]: Without dead ends: 4739 [2022-03-03 20:14:34,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=539, Invalid=2767, Unknown=0, NotChecked=0, Total=3306 [2022-03-03 20:14:34,932 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 298 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:34,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 253 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 20:14:34,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4739 states. [2022-03-03 20:14:34,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4739 to 3175. [2022-03-03 20:14:34,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3175 states, 3174 states have (on average 3.5598613736609956) internal successors, (11299), 3174 states have internal predecessors, (11299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:34,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3175 states to 3175 states and 11299 transitions. [2022-03-03 20:14:34,985 INFO L78 Accepts]: Start accepts. Automaton has 3175 states and 11299 transitions. Word has length 26 [2022-03-03 20:14:34,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:34,985 INFO L470 AbstractCegarLoop]: Abstraction has 3175 states and 11299 transitions. [2022-03-03 20:14:34,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:34,985 INFO L276 IsEmpty]: Start isEmpty. Operand 3175 states and 11299 transitions. [2022-03-03 20:14:34,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:14:34,989 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:34,989 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, 1] [2022-03-03 20:14:35,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-03 20:14:35,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:35,204 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:35,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:35,204 INFO L85 PathProgramCache]: Analyzing trace with hash -497021894, now seen corresponding path program 32 times [2022-03-03 20:14:35,205 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:35,205 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374512368] [2022-03-03 20:14:35,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:35,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:35,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:35,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:35,553 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:35,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374512368] [2022-03-03 20:14:35,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374512368] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:35,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140248715] [2022-03-03 20:14:35,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:14:35,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:35,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:35,554 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:35,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-03 20:14:35,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:14:35,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:14:35,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:14:35,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:36,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:14:36,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:14:36,157 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 109 treesize of output 75 [2022-03-03 20:14:36,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:36,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:37,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:14:37,243 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:14:37,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 343 treesize of output 269 [2022-03-03 20:14:42,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:42,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140248715] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:42,134 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:42,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:14:42,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282240910] [2022-03-03 20:14:42,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:42,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:14:42,134 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:42,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:14:42,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:14:42,134 INFO L87 Difference]: Start difference. First operand 3175 states and 11299 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:46,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:46,606 INFO L93 Difference]: Finished difference Result 4856 states and 16308 transitions. [2022-03-03 20:14:46,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 20:14:46,606 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:14:46,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:46,615 INFO L225 Difference]: With dead ends: 4856 [2022-03-03 20:14:46,615 INFO L226 Difference]: Without dead ends: 4814 [2022-03-03 20:14:46,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=631, Invalid=3529, Unknown=0, NotChecked=0, Total=4160 [2022-03-03 20:14:46,615 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 325 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 1312 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:46,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 336 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1312 Invalid, 0 Unknown, 190 Unchecked, 0.8s Time] [2022-03-03 20:14:46,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4814 states. [2022-03-03 20:14:46,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4814 to 3150. [2022-03-03 20:14:46,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3150 states, 3149 states have (on average 3.5674817402349954) internal successors, (11234), 3149 states have internal predecessors, (11234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:46,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3150 states to 3150 states and 11234 transitions. [2022-03-03 20:14:46,673 INFO L78 Accepts]: Start accepts. Automaton has 3150 states and 11234 transitions. Word has length 26 [2022-03-03 20:14:46,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:46,673 INFO L470 AbstractCegarLoop]: Abstraction has 3150 states and 11234 transitions. [2022-03-03 20:14:46,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:46,673 INFO L276 IsEmpty]: Start isEmpty. Operand 3150 states and 11234 transitions. [2022-03-03 20:14:46,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:14:46,678 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:46,678 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, 1] [2022-03-03 20:14:46,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-03 20:14:46,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-03 20:14:46,894 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:46,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:46,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1916842724, now seen corresponding path program 33 times [2022-03-03 20:14:46,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:46,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647278138] [2022-03-03 20:14:46,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:46,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:46,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:47,242 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:47,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647278138] [2022-03-03 20:14:47,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647278138] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:47,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118319589] [2022-03-03 20:14:47,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:14:47,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:47,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:47,243 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:47,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-03 20:14:47,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:14:47,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:14:47,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:14:47,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:47,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:14:47,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:14:47,747 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 109 treesize of output 75 [2022-03-03 20:14:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:47,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:48,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:14:48,676 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:14:48,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 407 treesize of output 309 [2022-03-03 20:14:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:52,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118319589] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:52,056 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:52,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:14:52,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584698042] [2022-03-03 20:14:52,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:52,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:14:52,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:52,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:14:52,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:14:52,056 INFO L87 Difference]: Start difference. First operand 3150 states and 11234 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:57,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:57,114 INFO L93 Difference]: Finished difference Result 5175 states and 17368 transitions. [2022-03-03 20:14:57,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 20:14:57,114 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:14:57,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:57,124 INFO L225 Difference]: With dead ends: 5175 [2022-03-03 20:14:57,124 INFO L226 Difference]: Without dead ends: 5124 [2022-03-03 20:14:57,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=711, Invalid=3321, Unknown=0, NotChecked=0, Total=4032 [2022-03-03 20:14:57,124 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 384 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:57,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 317 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1344 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 20:14:57,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5124 states. [2022-03-03 20:14:57,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5124 to 3157. [2022-03-03 20:14:57,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 3156 states have (on average 3.571292775665399) internal successors, (11271), 3156 states have internal predecessors, (11271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:57,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 11271 transitions. [2022-03-03 20:14:57,183 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 11271 transitions. Word has length 26 [2022-03-03 20:14:57,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:57,183 INFO L470 AbstractCegarLoop]: Abstraction has 3157 states and 11271 transitions. [2022-03-03 20:14:57,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:57,184 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 11271 transitions. [2022-03-03 20:14:57,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:14:57,188 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:57,188 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, 1] [2022-03-03 20:14:57,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-03 20:14:57,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-03-03 20:14:57,404 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:57,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:57,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1119118296, now seen corresponding path program 34 times [2022-03-03 20:14:57,405 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:57,405 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406240948] [2022-03-03 20:14:57,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:57,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:57,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:57,674 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:57,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406240948] [2022-03-03 20:14:57,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406240948] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:57,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341831504] [2022-03-03 20:14:57,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:14:57,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:57,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:57,675 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:57,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-03 20:14:57,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:14:57,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:14:57,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 20:14:57,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:57,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:14:57,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:14:57,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:14:58,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:58,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:59,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:14:59,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:14:59,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 343 treesize of output 269 [2022-03-03 20:15:07,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:07,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341831504] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:07,678 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:07,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:15:07,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603854460] [2022-03-03 20:15:07,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:07,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:15:07,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:07,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:15:07,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:15:07,679 INFO L87 Difference]: Start difference. First operand 3157 states and 11271 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:12,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:12,433 INFO L93 Difference]: Finished difference Result 5618 states and 18849 transitions. [2022-03-03 20:15:12,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 20:15:12,434 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:15:12,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:12,445 INFO L225 Difference]: With dead ends: 5618 [2022-03-03 20:15:12,445 INFO L226 Difference]: Without dead ends: 5567 [2022-03-03 20:15:12,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=799, Invalid=3233, Unknown=0, NotChecked=0, Total=4032 [2022-03-03 20:15:12,446 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 305 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 1403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:12,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 379 Invalid, 1403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 20:15:12,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5567 states. [2022-03-03 20:15:12,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5567 to 3162. [2022-03-03 20:15:12,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3162 states, 3161 states have (on average 3.574185384372034) internal successors, (11298), 3161 states have internal predecessors, (11298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:12,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3162 states to 3162 states and 11298 transitions. [2022-03-03 20:15:12,513 INFO L78 Accepts]: Start accepts. Automaton has 3162 states and 11298 transitions. Word has length 26 [2022-03-03 20:15:12,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:12,513 INFO L470 AbstractCegarLoop]: Abstraction has 3162 states and 11298 transitions. [2022-03-03 20:15:12,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:12,513 INFO L276 IsEmpty]: Start isEmpty. Operand 3162 states and 11298 transitions. [2022-03-03 20:15:12,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:15:12,518 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:12,518 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, 1] [2022-03-03 20:15:12,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-03 20:15:12,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:12,723 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:12,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:12,724 INFO L85 PathProgramCache]: Analyzing trace with hash 622396936, now seen corresponding path program 35 times [2022-03-03 20:15:12,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:12,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327320989] [2022-03-03 20:15:12,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:12,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:12,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:12,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:12,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:12,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327320989] [2022-03-03 20:15:12,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327320989] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:12,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599461628] [2022-03-03 20:15:12,960 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:15:12,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:12,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:12,961 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:12,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-03 20:15:12,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:15:12,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:12,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:15:12,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:13,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:15:13,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:13,453 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 109 treesize of output 75 [2022-03-03 20:15:13,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:13,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:14,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:14,287 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:15:14,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 339 treesize of output 265 [2022-03-03 20:15:17,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:17,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599461628] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:17,727 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:17,727 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:15:17,727 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465817849] [2022-03-03 20:15:17,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:17,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:15:17,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:17,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:15:17,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:15:17,728 INFO L87 Difference]: Start difference. First operand 3162 states and 11298 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:26,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:26,115 INFO L93 Difference]: Finished difference Result 5459 states and 18245 transitions. [2022-03-03 20:15:26,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-03 20:15:26,115 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:15:26,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:26,126 INFO L225 Difference]: With dead ends: 5459 [2022-03-03 20:15:26,126 INFO L226 Difference]: Without dead ends: 5410 [2022-03-03 20:15:26,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 43 SyntacticMatches, 7 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3071 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1162, Invalid=7210, Unknown=0, NotChecked=0, Total=8372 [2022-03-03 20:15:26,127 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 362 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 1684 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 2128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 361 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:26,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 482 Invalid, 2128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1684 Invalid, 0 Unknown, 361 Unchecked, 1.1s Time] [2022-03-03 20:15:26,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5410 states. [2022-03-03 20:15:26,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5410 to 3200. [2022-03-03 20:15:26,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3200 states, 3199 states have (on average 3.577680525164114) internal successors, (11445), 3199 states have internal predecessors, (11445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:26,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3200 states to 3200 states and 11445 transitions. [2022-03-03 20:15:26,197 INFO L78 Accepts]: Start accepts. Automaton has 3200 states and 11445 transitions. Word has length 26 [2022-03-03 20:15:26,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:26,198 INFO L470 AbstractCegarLoop]: Abstraction has 3200 states and 11445 transitions. [2022-03-03 20:15:26,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:26,198 INFO L276 IsEmpty]: Start isEmpty. Operand 3200 states and 11445 transitions. [2022-03-03 20:15:26,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:15:26,203 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:26,203 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, 1] [2022-03-03 20:15:26,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-03-03 20:15:26,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:26,419 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:26,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:26,419 INFO L85 PathProgramCache]: Analyzing trace with hash -995135844, now seen corresponding path program 36 times [2022-03-03 20:15:26,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:26,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558547986] [2022-03-03 20:15:26,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:26,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:26,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:26,774 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:26,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558547986] [2022-03-03 20:15:26,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558547986] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:26,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489721959] [2022-03-03 20:15:26,774 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:15:26,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:26,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:26,776 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:26,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-03 20:15:26,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:15:26,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:26,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:15:26,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:27,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:15:27,188 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:15:27,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:15:27,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:27,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:29,029 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:15:29,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 379 treesize of output 305 [2022-03-03 20:15:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:35,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489721959] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:35,894 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:35,894 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 20:15:35,894 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146353535] [2022-03-03 20:15:35,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:35,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:15:35,894 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:35,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:15:35,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:15:35,895 INFO L87 Difference]: Start difference. First operand 3200 states and 11445 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:40,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:40,640 INFO L93 Difference]: Finished difference Result 5697 states and 19073 transitions. [2022-03-03 20:15:40,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-03 20:15:40,640 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:15:40,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:40,651 INFO L225 Difference]: With dead ends: 5697 [2022-03-03 20:15:40,652 INFO L226 Difference]: Without dead ends: 5661 [2022-03-03 20:15:40,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=623, Invalid=2569, Unknown=0, NotChecked=0, Total=3192 [2022-03-03 20:15:40,652 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 377 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:40,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 393 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1145 Invalid, 0 Unknown, 217 Unchecked, 0.8s Time] [2022-03-03 20:15:40,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5661 states. [2022-03-03 20:15:40,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5661 to 3208. [2022-03-03 20:15:40,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3208 states, 3207 states have (on average 3.5799812909260993) internal successors, (11481), 3207 states have internal predecessors, (11481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:40,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3208 states to 3208 states and 11481 transitions. [2022-03-03 20:15:40,724 INFO L78 Accepts]: Start accepts. Automaton has 3208 states and 11481 transitions. Word has length 26 [2022-03-03 20:15:40,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:40,724 INFO L470 AbstractCegarLoop]: Abstraction has 3208 states and 11481 transitions. [2022-03-03 20:15:40,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:40,724 INFO L276 IsEmpty]: Start isEmpty. Operand 3208 states and 11481 transitions. [2022-03-03 20:15:40,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:15:40,730 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:40,730 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, 1] [2022-03-03 20:15:40,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-03 20:15:40,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-03-03 20:15:40,946 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:40,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:40,946 INFO L85 PathProgramCache]: Analyzing trace with hash -974399316, now seen corresponding path program 37 times [2022-03-03 20:15:40,946 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:40,946 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056546258] [2022-03-03 20:15:40,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:40,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:40,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:41,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:41,281 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:41,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056546258] [2022-03-03 20:15:41,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056546258] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:41,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118611116] [2022-03-03 20:15:41,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:15:41,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:41,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:41,282 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:41,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-03 20:15:41,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:41,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:15:41,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:41,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:15:41,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:41,961 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 109 treesize of output 75 [2022-03-03 20:15:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:42,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:43,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:43,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:15:43,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 359 treesize of output 285 [2022-03-03 20:15:47,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:47,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118611116] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:47,312 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:47,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 20:15:47,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876038241] [2022-03-03 20:15:47,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:47,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 20:15:47,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:47,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 20:15:47,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2022-03-03 20:15:47,313 INFO L87 Difference]: Start difference. First operand 3208 states and 11481 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:51,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:51,887 INFO L93 Difference]: Finished difference Result 5326 states and 17843 transitions. [2022-03-03 20:15:51,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-03 20:15:51,887 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:15:51,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:51,898 INFO L225 Difference]: With dead ends: 5326 [2022-03-03 20:15:51,898 INFO L226 Difference]: Without dead ends: 5284 [2022-03-03 20:15:51,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=821, Invalid=4009, Unknown=0, NotChecked=0, Total=4830 [2022-03-03 20:15:51,898 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 340 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 320 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:51,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 315 Invalid, 1478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1100 Invalid, 0 Unknown, 320 Unchecked, 0.7s Time] [2022-03-03 20:15:51,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5284 states. [2022-03-03 20:15:51,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5284 to 3193. [2022-03-03 20:15:51,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3193 states, 3192 states have (on average 3.580200501253133) internal successors, (11428), 3192 states have internal predecessors, (11428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:51,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3193 states to 3193 states and 11428 transitions. [2022-03-03 20:15:51,968 INFO L78 Accepts]: Start accepts. Automaton has 3193 states and 11428 transitions. Word has length 26 [2022-03-03 20:15:51,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:51,968 INFO L470 AbstractCegarLoop]: Abstraction has 3193 states and 11428 transitions. [2022-03-03 20:15:51,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:51,968 INFO L276 IsEmpty]: Start isEmpty. Operand 3193 states and 11428 transitions. [2022-03-03 20:15:51,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:15:51,973 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:51,973 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, 1] [2022-03-03 20:15:51,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-03 20:15:52,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:52,187 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:52,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:52,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1887383500, now seen corresponding path program 38 times [2022-03-03 20:15:52,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:52,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264056963] [2022-03-03 20:15:52,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:52,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:52,468 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:52,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264056963] [2022-03-03 20:15:52,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264056963] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:52,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55495483] [2022-03-03 20:15:52,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:15:52,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:52,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:52,476 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:52,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-03 20:15:52,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:15:52,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:52,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:15:52,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:53,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:15:53,025 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:15:53,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:15:53,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:53,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:54,299 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:15:54,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 339 treesize of output 261 [2022-03-03 20:15:57,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:57,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55495483] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:57,259 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:57,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:15:57,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045843546] [2022-03-03 20:15:57,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:57,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:15:57,259 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:57,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:15:57,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:15:57,260 INFO L87 Difference]: Start difference. First operand 3193 states and 11428 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:03,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:16:03,350 INFO L93 Difference]: Finished difference Result 6003 states and 19955 transitions. [2022-03-03 20:16:03,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 20:16:03,351 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:16:03,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:16:03,364 INFO L225 Difference]: With dead ends: 6003 [2022-03-03 20:16:03,364 INFO L226 Difference]: Without dead ends: 5936 [2022-03-03 20:16:03,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=898, Invalid=4954, Unknown=0, NotChecked=0, Total=5852 [2022-03-03 20:16:03,365 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 308 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:16:03,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 362 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1654 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-03 20:16:03,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5936 states. [2022-03-03 20:16:03,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5936 to 3252. [2022-03-03 20:16:03,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3252 states, 3251 states have (on average 3.5770532143955704) internal successors, (11629), 3251 states have internal predecessors, (11629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:03,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3252 states to 3252 states and 11629 transitions. [2022-03-03 20:16:03,437 INFO L78 Accepts]: Start accepts. Automaton has 3252 states and 11629 transitions. Word has length 26 [2022-03-03 20:16:03,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:16:03,437 INFO L470 AbstractCegarLoop]: Abstraction has 3252 states and 11629 transitions. [2022-03-03 20:16:03,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:03,437 INFO L276 IsEmpty]: Start isEmpty. Operand 3252 states and 11629 transitions. [2022-03-03 20:16:03,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:16:03,442 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:16:03,442 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, 1] [2022-03-03 20:16:03,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-03 20:16:03,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:03,649 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:16:03,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:16:03,650 INFO L85 PathProgramCache]: Analyzing trace with hash 223773220, now seen corresponding path program 39 times [2022-03-03 20:16:03,650 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:16:03,650 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534178796] [2022-03-03 20:16:03,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:16:03,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:16:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:16:03,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:03,923 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:16:03,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534178796] [2022-03-03 20:16:03,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534178796] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:16:03,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668845040] [2022-03-03 20:16:03,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:16:03,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:03,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:16:03,925 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:16:03,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-03 20:16:03,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:16:03,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:16:03,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:16:03,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:16:04,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:16:04,294 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:04,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 73 [2022-03-03 20:16:05,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:05,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:16:05,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:05,926 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:05,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 355 treesize of output 269 [2022-03-03 20:16:08,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:08,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668845040] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:16:08,672 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:16:08,672 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:16:08,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913186138] [2022-03-03 20:16:08,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:16:08,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:16:08,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:16:08,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:16:08,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:16:08,673 INFO L87 Difference]: Start difference. First operand 3252 states and 11629 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:13,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:16:13,030 INFO L93 Difference]: Finished difference Result 5298 states and 17762 transitions. [2022-03-03 20:16:13,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 20:16:13,030 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:16:13,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:16:13,041 INFO L225 Difference]: With dead ends: 5298 [2022-03-03 20:16:13,042 INFO L226 Difference]: Without dead ends: 5233 [2022-03-03 20:16:13,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=735, Invalid=3047, Unknown=0, NotChecked=0, Total=3782 [2022-03-03 20:16:13,042 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 338 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:16:13,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 240 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 877 Invalid, 0 Unknown, 142 Unchecked, 0.6s Time] [2022-03-03 20:16:13,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5233 states. [2022-03-03 20:16:13,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5233 to 3254. [2022-03-03 20:16:13,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3254 states, 3253 states have (on average 3.5766984322164155) internal successors, (11635), 3253 states have internal predecessors, (11635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:13,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3254 states to 3254 states and 11635 transitions. [2022-03-03 20:16:13,117 INFO L78 Accepts]: Start accepts. Automaton has 3254 states and 11635 transitions. Word has length 26 [2022-03-03 20:16:13,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:16:13,117 INFO L470 AbstractCegarLoop]: Abstraction has 3254 states and 11635 transitions. [2022-03-03 20:16:13,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:13,118 INFO L276 IsEmpty]: Start isEmpty. Operand 3254 states and 11635 transitions. [2022-03-03 20:16:13,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:16:13,125 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:16:13,125 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, 1] [2022-03-03 20:16:13,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-03 20:16:13,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-03-03 20:16:13,343 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:16:13,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:16:13,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1314135212, now seen corresponding path program 40 times [2022-03-03 20:16:13,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:16:13,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080574542] [2022-03-03 20:16:13,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:16:13,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:16:13,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:16:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:13,598 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:16:13,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080574542] [2022-03-03 20:16:13,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080574542] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:16:13,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802339387] [2022-03-03 20:16:13,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:16:13,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:13,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:16:13,600 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:16:13,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-03 20:16:13,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:16:13,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:16:13,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:16:13,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:16:13,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:16:13,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:13,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-03 20:16:14,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:14,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:16:15,492 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:16:15,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 347 treesize of output 269 [2022-03-03 20:16:18,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:18,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802339387] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:16:18,064 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:16:18,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:16:18,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722829060] [2022-03-03 20:16:18,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:16:18,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:16:18,064 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:16:18,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:16:18,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:16:18,065 INFO L87 Difference]: Start difference. First operand 3254 states and 11635 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:21,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:16:21,483 INFO L93 Difference]: Finished difference Result 5530 states and 18586 transitions. [2022-03-03 20:16:21,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 20:16:21,483 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:16:21,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:16:21,494 INFO L225 Difference]: With dead ends: 5530 [2022-03-03 20:16:21,494 INFO L226 Difference]: Without dead ends: 5481 [2022-03-03 20:16:21,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=643, Invalid=3517, Unknown=0, NotChecked=0, Total=4160 [2022-03-03 20:16:21,495 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 305 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:16:21,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 337 Invalid, 1456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1397 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 20:16:21,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5481 states. [2022-03-03 20:16:21,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5481 to 3246. [2022-03-03 20:16:21,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3246 states, 3245 states have (on average 3.579352850539291) internal successors, (11615), 3245 states have internal predecessors, (11615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:21,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3246 states to 3246 states and 11615 transitions. [2022-03-03 20:16:21,583 INFO L78 Accepts]: Start accepts. Automaton has 3246 states and 11615 transitions. Word has length 26 [2022-03-03 20:16:21,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:16:21,584 INFO L470 AbstractCegarLoop]: Abstraction has 3246 states and 11615 transitions. [2022-03-03 20:16:21,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:21,584 INFO L276 IsEmpty]: Start isEmpty. Operand 3246 states and 11615 transitions. [2022-03-03 20:16:21,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:16:21,589 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:16:21,589 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, 1] [2022-03-03 20:16:21,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-03 20:16:21,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:21,803 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:16:21,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:16:21,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1836189860, now seen corresponding path program 41 times [2022-03-03 20:16:21,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:16:21,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662608650] [2022-03-03 20:16:21,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:16:21,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:16:21,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:16:22,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:22,207 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:16:22,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662608650] [2022-03-03 20:16:22,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662608650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:16:22,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510978627] [2022-03-03 20:16:22,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:16:22,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:22,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:16:22,218 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:16:22,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-03 20:16:22,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:16:22,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:16:22,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:16:22,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:16:22,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:16:22,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:22,808 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 109 treesize of output 75 [2022-03-03 20:16:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:23,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:16:23,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:23,980 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:23,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 395 treesize of output 309 [2022-03-03 20:16:33,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:33,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510978627] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:16:33,315 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:16:33,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-03 20:16:33,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241065777] [2022-03-03 20:16:33,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:16:33,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:16:33,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:16:33,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:16:33,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:16:33,326 INFO L87 Difference]: Start difference. First operand 3246 states and 11615 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:45,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:16:45,228 INFO L93 Difference]: Finished difference Result 6344 states and 20577 transitions. [2022-03-03 20:16:45,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-03 20:16:45,228 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:16:45,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:16:45,240 INFO L225 Difference]: With dead ends: 6344 [2022-03-03 20:16:45,241 INFO L226 Difference]: Without dead ends: 6226 [2022-03-03 20:16:45,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4326 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=1625, Invalid=11031, Unknown=0, NotChecked=0, Total=12656 [2022-03-03 20:16:45,242 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 467 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1965 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 2044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:16:45,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 474 Invalid, 2044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1965 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 20:16:45,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6226 states. [2022-03-03 20:16:45,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6226 to 3380. [2022-03-03 20:16:45,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3380 states, 3379 states have (on average 3.5791654335602248) internal successors, (12094), 3379 states have internal predecessors, (12094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:45,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3380 states to 3380 states and 12094 transitions. [2022-03-03 20:16:45,320 INFO L78 Accepts]: Start accepts. Automaton has 3380 states and 12094 transitions. Word has length 26 [2022-03-03 20:16:45,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:16:45,320 INFO L470 AbstractCegarLoop]: Abstraction has 3380 states and 12094 transitions. [2022-03-03 20:16:45,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:45,321 INFO L276 IsEmpty]: Start isEmpty. Operand 3380 states and 12094 transitions. [2022-03-03 20:16:45,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:16:45,326 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:16:45,326 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, 1] [2022-03-03 20:16:45,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-03 20:16:45,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:45,539 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:16:45,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:16:45,540 INFO L85 PathProgramCache]: Analyzing trace with hash -2003998952, now seen corresponding path program 42 times [2022-03-03 20:16:45,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:16:45,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174882232] [2022-03-03 20:16:45,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:16:45,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:16:45,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:16:45,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:45,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:16:45,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174882232] [2022-03-03 20:16:45,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174882232] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:16:45,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150874217] [2022-03-03 20:16:45,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:16:45,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:45,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:16:45,784 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:16:45,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-03 20:16:45,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 20:16:45,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:16:45,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:16:45,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:16:46,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:16:46,391 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:46,392 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 109 treesize of output 91 [2022-03-03 20:16:48,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:48,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:16:49,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:49,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:49,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:49,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 311 treesize of output 257 [2022-03-03 20:16:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:50,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150874217] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:16:50,758 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:16:50,758 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-03 20:16:50,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168231880] [2022-03-03 20:16:50,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:16:50,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:16:50,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:16:50,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:16:50,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:16:50,759 INFO L87 Difference]: Start difference. First operand 3380 states and 12094 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:04,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:04,581 INFO L93 Difference]: Finished difference Result 9943 states and 33398 transitions. [2022-03-03 20:17:04,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-03-03 20:17:04,582 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:17:04,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:04,601 INFO L225 Difference]: With dead ends: 9943 [2022-03-03 20:17:04,601 INFO L226 Difference]: Without dead ends: 9898 [2022-03-03 20:17:04,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6947 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=2760, Invalid=15062, Unknown=0, NotChecked=0, Total=17822 [2022-03-03 20:17:04,602 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 578 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 1634 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 2581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 862 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:04,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 562 Invalid, 2581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1634 Invalid, 0 Unknown, 862 Unchecked, 1.0s Time] [2022-03-03 20:17:04,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9898 states. [2022-03-03 20:17:04,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9898 to 3456. [2022-03-03 20:17:04,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3456 states, 3455 states have (on average 3.588712011577424) internal successors, (12399), 3455 states have internal predecessors, (12399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:04,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3456 states to 3456 states and 12399 transitions. [2022-03-03 20:17:04,702 INFO L78 Accepts]: Start accepts. Automaton has 3456 states and 12399 transitions. Word has length 26 [2022-03-03 20:17:04,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:04,702 INFO L470 AbstractCegarLoop]: Abstraction has 3456 states and 12399 transitions. [2022-03-03 20:17:04,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:04,702 INFO L276 IsEmpty]: Start isEmpty. Operand 3456 states and 12399 transitions. [2022-03-03 20:17:04,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:17:04,707 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:04,707 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, 1] [2022-03-03 20:17:04,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-03 20:17:04,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-03-03 20:17:04,919 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:17:04,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:04,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1705225504, now seen corresponding path program 43 times [2022-03-03 20:17:04,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:04,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53574660] [2022-03-03 20:17:04,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:04,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:04,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:05,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:05,181 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:05,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53574660] [2022-03-03 20:17:05,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53574660] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:05,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338292954] [2022-03-03 20:17:05,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:17:05,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:05,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:05,183 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:17:05,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-03 20:17:05,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:05,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:17:05,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:05,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:17:05,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:05,604 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 89 treesize of output 65 [2022-03-03 20:17:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:05,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:06,740 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:17:06,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 347 treesize of output 269 [2022-03-03 20:17:16,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:16,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338292954] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:17:16,160 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:17:16,160 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:17:16,160 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038780360] [2022-03-03 20:17:16,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:17:16,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:17:16,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:16,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:17:16,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:17:16,161 INFO L87 Difference]: Start difference. First operand 3456 states and 12399 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:20,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:20,217 INFO L93 Difference]: Finished difference Result 5775 states and 19549 transitions. [2022-03-03 20:17:20,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-03 20:17:20,217 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:17:20,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:20,229 INFO L225 Difference]: With dead ends: 5775 [2022-03-03 20:17:20,229 INFO L226 Difference]: Without dead ends: 5670 [2022-03-03 20:17:20,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=526, Invalid=2780, Unknown=0, NotChecked=0, Total=3306 [2022-03-03 20:17:20,230 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 280 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:20,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 272 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 983 Invalid, 0 Unknown, 72 Unchecked, 0.6s Time] [2022-03-03 20:17:20,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5670 states. [2022-03-03 20:17:20,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5670 to 3462. [2022-03-03 20:17:20,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3462 states, 3461 states have (on average 3.584224212655302) internal successors, (12405), 3461 states have internal predecessors, (12405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:20,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3462 states to 3462 states and 12405 transitions. [2022-03-03 20:17:20,307 INFO L78 Accepts]: Start accepts. Automaton has 3462 states and 12405 transitions. Word has length 26 [2022-03-03 20:17:20,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:20,307 INFO L470 AbstractCegarLoop]: Abstraction has 3462 states and 12405 transitions. [2022-03-03 20:17:20,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:20,308 INFO L276 IsEmpty]: Start isEmpty. Operand 3462 states and 12405 transitions. [2022-03-03 20:17:20,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:17:20,313 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:20,313 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, 1] [2022-03-03 20:17:20,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-03 20:17:20,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:20,533 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:17:20,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:20,534 INFO L85 PathProgramCache]: Analyzing trace with hash 639330528, now seen corresponding path program 44 times [2022-03-03 20:17:20,534 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:20,534 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884267018] [2022-03-03 20:17:20,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:20,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:20,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:20,874 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:20,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884267018] [2022-03-03 20:17:20,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884267018] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:20,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849077883] [2022-03-03 20:17:20,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:17:20,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:20,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:20,878 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:17:20,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-03 20:17:20,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:17:20,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:17:20,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:17:20,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:21,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:17:21,325 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:21,325 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 89 treesize of output 81 [2022-03-03 20:17:22,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:22,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:26,593 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:26,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 307 treesize of output 265 Received shutdown request... [2022-03-03 20:17:53,455 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-03-03 20:17:53,457 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-03-03 20:17:53,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-03-03 20:17:53,499 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-03 20:17:53,499 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-03 20:17:53,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:53,672 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 16ms.. [2022-03-03 20:17:53,674 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-03-03 20:17:53,674 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-03-03 20:17:53,674 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-03-03 20:17:53,676 INFO L732 BasicCegarLoop]: Path program histogram: [44, 43, 1, 1, 1] [2022-03-03 20:17:53,678 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-03 20:17:53,678 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-03 20:17:53,680 INFO L202 PluginConnector]: Adding new model min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.03 08:17:53 BasicIcfg [2022-03-03 20:17:53,680 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-03 20:17:53,680 INFO L158 Benchmark]: Toolchain (without parser) took 860682.50ms. Allocated memory was 162.5MB in the beginning and 846.2MB in the end (delta: 683.7MB). Free memory was 127.3MB in the beginning and 425.3MB in the end (delta: -298.0MB). Peak memory consumption was 522.9MB. Max. memory is 8.0GB. [2022-03-03 20:17:53,680 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 162.5MB. Free memory is still 128.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-03 20:17:53,680 INFO L158 Benchmark]: Boogie Procedure Inliner took 17.94ms. Allocated memory is still 162.5MB. Free memory was 127.2MB in the beginning and 125.7MB in the end (delta: 1.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-03-03 20:17:53,680 INFO L158 Benchmark]: Boogie Preprocessor took 10.33ms. Allocated memory is still 162.5MB. Free memory was 125.7MB in the beginning and 124.7MB in the end (delta: 983.8kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-03 20:17:53,680 INFO L158 Benchmark]: RCFGBuilder took 166.30ms. Allocated memory is still 162.5MB. Free memory was 124.6MB in the beginning and 115.2MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-03 20:17:53,680 INFO L158 Benchmark]: TraceAbstraction took 860484.83ms. Allocated memory was 162.5MB in the beginning and 846.2MB in the end (delta: 683.7MB). Free memory was 114.7MB in the beginning and 425.3MB in the end (delta: -310.7MB). Peak memory consumption was 509.2MB. Max. memory is 8.0GB. [2022-03-03 20:17:53,680 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 162.5MB. Free memory is still 128.4MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 17.94ms. Allocated memory is still 162.5MB. Free memory was 127.2MB in the beginning and 125.7MB in the end (delta: 1.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 10.33ms. Allocated memory is still 162.5MB. Free memory was 125.7MB in the beginning and 124.7MB in the end (delta: 983.8kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 166.30ms. Allocated memory is still 162.5MB. Free memory was 124.6MB in the beginning and 115.2MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 860484.83ms. Allocated memory was 162.5MB in the beginning and 846.2MB in the end (delta: 683.7MB). Free memory was 114.7MB in the beginning and 425.3MB in the end (delta: -310.7MB). Peak memory consumption was 509.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 16ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 16ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 16ms.. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 16ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 860.4s, OverallIterations: 90, TraceHistogramMax: 2, PathProgramHistogramMax: 44, EmptinessCheckTime: 0.3s, AutomataDifference: 438.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 31846 SdHoareTripleChecker+Valid, 58.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 31846 mSDsluCounter, 27725 SdHoareTripleChecker+Invalid, 50.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 9033 IncrementalHoareTripleChecker+Unchecked, 49269 mSDsCounter, 6219 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 99229 IncrementalHoareTripleChecker+Invalid, 114481 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6219 mSolverCounterUnsat, 2504 mSDtfsCounter, 99229 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 9183 GetRequests, 3165 SyntacticMatches, 228 SemanticMatches, 5790 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178889 ImplicationChecksByTransitivity, 414.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3462occurred in iteration=89, InterpolantAutomatonStates: 4761, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 4.3s AutomataMinimizationTime, 89 MinimizatonAttempts, 180532 StatesRemovedByMinimization, 89 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 361.9s InterpolantComputationTime, 4362 NumberOfCodeBlocks, 4359 NumberOfCodeBlocksAsserted, 273 NumberOfCheckSat, 6253 ConstructedInterpolants, 88 QuantifiedInterpolants, 219021 SizeOfPredicates, 1047 NumberOfNonLiveVariables, 5627 ConjunctsInSsa, 1691 ConjunctsInUnsatCore, 261 InterpolantComputations, 3 PerfectInterpolantSequences, 174/1430 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown