/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 05:57:08,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 05:57:08,050 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 05:57:08,129 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 05:57:08,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 05:57:08,176 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 05:57:08,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 05:57:08,179 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-01-18 05:57:08,208 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 05:57:08,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 05:57:08,209 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 05:57:08,209 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 05:57:08,210 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 05:57:08,210 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 05:57:08,211 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 05:57:08,211 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 05:57:08,211 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 05:57:08,211 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 05:57:08,212 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 05:57:08,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 05:57:08,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 05:57:08,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 05:57:08,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 05:57:08,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 05:57:08,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 05:57:08,213 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 05:57:08,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 05:57:08,213 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 05:57:08,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 05:57:08,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 05:57:08,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 05:57:08,214 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 05:57:08,215 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 05:57:08,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 05:57:08,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 05:57:08,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 05:57:08,215 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 05:57:08,215 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 05:57:08,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 05:57:08,216 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 05:57:08,216 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 05:57:08,216 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 05:57:08,450 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 05:57:08,472 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 05:57:08,474 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 05:57:08,475 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 05:57:08,477 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 05:57:08,478 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl [2022-01-18 05:57:08,478 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl' [2022-01-18 05:57:08,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 05:57:08,498 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 05:57:08,499 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 05:57:08,499 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 05:57:08,499 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 05:57:08,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:57:08" (1/1) ... [2022-01-18 05:57:08,514 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:57:08" (1/1) ... [2022-01-18 05:57:08,518 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 05:57:08,519 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 05:57:08,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 05:57:08,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 05:57:08,520 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 05:57:08,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:57:08" (1/1) ... [2022-01-18 05:57:08,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:57:08" (1/1) ... [2022-01-18 05:57:08,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:57:08" (1/1) ... [2022-01-18 05:57:08,527 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:57:08" (1/1) ... [2022-01-18 05:57:08,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:57:08" (1/1) ... [2022-01-18 05:57:08,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:57:08" (1/1) ... [2022-01-18 05:57:08,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:57:08" (1/1) ... [2022-01-18 05:57:08,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 05:57:08,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 05:57:08,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 05:57:08,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 05:57:08,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:57:08" (1/1) ... [2022-01-18 05:57:08,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 05:57:08,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:08,556 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-18 05:57:08,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-18 05:57:08,588 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 05:57:08,588 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 05:57:08,588 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 05:57:08,588 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 05:57:08,588 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 05:57:08,588 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 05:57:08,588 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 05:57:08,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 05:57:08,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 05:57:08,589 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 05:57:08,590 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 05:57:08,590 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 05:57:08,591 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 05:57:08,631 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 05:57:08,632 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 05:57:08,734 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 05:57:08,746 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 05:57:08,746 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 05:57:08,747 INFO L202 PluginConnector]: Adding new model prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:57:08 BoogieIcfgContainer [2022-01-18 05:57:08,748 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 05:57:08,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 05:57:08,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 05:57:08,751 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 05:57:08,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:57:08" (1/2) ... [2022-01-18 05:57:08,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@704157cf and model type prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 05:57:08, skipping insertion in model container [2022-01-18 05:57:08,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:57:08" (2/2) ... [2022-01-18 05:57:08,754 INFO L111 eAbstractionObserver]: Analyzing ICFG prod-cons.wvr.bpl [2022-01-18 05:57:08,757 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 05:57:08,757 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 05:57:08,758 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 05:57:08,758 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 05:57:08,783 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-18 05:57:08,816 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 05:57:08,822 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 05:57:08,822 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-18 05:57:08,829 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 30 transitions, 84 flow [2022-01-18 05:57:08,857 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 132 states, 131 states have (on average 2.5877862595419847) internal successors, (339), 131 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:08,859 INFO L276 IsEmpty]: Start isEmpty. Operand has 132 states, 131 states have (on average 2.5877862595419847) internal successors, (339), 131 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:08,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 05:57:08,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:08,875 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:08,875 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:57:08,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:08,880 INFO L85 PathProgramCache]: Analyzing trace with hash 785752709, now seen corresponding path program 1 times [2022-01-18 05:57:08,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:08,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273098666] [2022-01-18 05:57:08,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:08,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:08,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:09,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:09,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273098666] [2022-01-18 05:57:09,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273098666] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:57:09,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:57:09,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 05:57:09,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935800723] [2022-01-18 05:57:09,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:57:09,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 05:57:09,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:09,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 05:57:09,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 05:57:09,113 INFO L87 Difference]: Start difference. First operand has 132 states, 131 states have (on average 2.5877862595419847) internal successors, (339), 131 states have internal predecessors, (339), 0 states have call successors, (0), 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 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:09,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:09,187 INFO L93 Difference]: Finished difference Result 172 states and 413 transitions. [2022-01-18 05:57:09,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 05:57:09,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 05:57:09,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:09,195 INFO L225 Difference]: With dead ends: 172 [2022-01-18 05:57:09,195 INFO L226 Difference]: Without dead ends: 109 [2022-01-18 05:57:09,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 05:57:09,200 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:09,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 25 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:57:09,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-18 05:57:09,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-01-18 05:57:09,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.3055555555555554) internal successors, (249), 108 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:09,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 249 transitions. [2022-01-18 05:57:09,270 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 249 transitions. Word has length 19 [2022-01-18 05:57:09,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:09,270 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 249 transitions. [2022-01-18 05:57:09,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:09,271 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 249 transitions. [2022-01-18 05:57:09,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 05:57:09,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:09,272 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:09,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 05:57:09,273 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:57:09,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:09,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1380410419, now seen corresponding path program 2 times [2022-01-18 05:57:09,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:09,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709808905] [2022-01-18 05:57:09,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:09,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:09,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:09,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:09,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:09,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709808905] [2022-01-18 05:57:09,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709808905] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:57:09,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:57:09,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 05:57:09,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723592914] [2022-01-18 05:57:09,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:57:09,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:57:09,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:09,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:57:09,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:57:09,318 INFO L87 Difference]: Start difference. First operand 109 states and 249 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:09,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:09,383 INFO L93 Difference]: Finished difference Result 190 states and 436 transitions. [2022-01-18 05:57:09,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 05:57:09,384 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 05:57:09,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:09,387 INFO L225 Difference]: With dead ends: 190 [2022-01-18 05:57:09,387 INFO L226 Difference]: Without dead ends: 142 [2022-01-18 05:57:09,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 05:57:09,389 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:09,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 27 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:57:09,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-01-18 05:57:09,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-01-18 05:57:09,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.3404255319148937) internal successors, (330), 141 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:09,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 330 transitions. [2022-01-18 05:57:09,402 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 330 transitions. Word has length 19 [2022-01-18 05:57:09,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:09,402 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 330 transitions. [2022-01-18 05:57:09,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:09,403 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 330 transitions. [2022-01-18 05:57:09,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:57:09,420 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:09,421 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] [2022-01-18 05:57:09,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 05:57:09,421 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:57:09,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:09,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1081760350, now seen corresponding path program 1 times [2022-01-18 05:57:09,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:09,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018089847] [2022-01-18 05:57:09,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:09,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:09,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:09,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:09,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018089847] [2022-01-18 05:57:09,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018089847] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:57:09,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:57:09,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 05:57:09,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720348185] [2022-01-18 05:57:09,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:57:09,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 05:57:09,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:09,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 05:57:09,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 05:57:09,480 INFO L87 Difference]: Start difference. First operand 142 states and 330 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:09,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:09,513 INFO L93 Difference]: Finished difference Result 164 states and 373 transitions. [2022-01-18 05:57:09,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 05:57:09,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:57:09,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:09,515 INFO L225 Difference]: With dead ends: 164 [2022-01-18 05:57:09,516 INFO L226 Difference]: Without dead ends: 152 [2022-01-18 05:57:09,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 05:57:09,517 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:09,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 33 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:57:09,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-18 05:57:09,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-01-18 05:57:09,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.3178807947019866) internal successors, (350), 151 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:09,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 350 transitions. [2022-01-18 05:57:09,529 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 350 transitions. Word has length 22 [2022-01-18 05:57:09,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:09,530 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 350 transitions. [2022-01-18 05:57:09,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:09,530 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 350 transitions. [2022-01-18 05:57:09,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 05:57:09,531 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:09,531 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, 1] [2022-01-18 05:57:09,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 05:57:09,532 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:57:09,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:09,532 INFO L85 PathProgramCache]: Analyzing trace with hash -220317154, now seen corresponding path program 1 times [2022-01-18 05:57:09,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:09,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043689144] [2022-01-18 05:57:09,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:09,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:09,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:09,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:09,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:09,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043689144] [2022-01-18 05:57:09,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043689144] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:09,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767558006] [2022-01-18 05:57:09,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:09,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:09,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:09,723 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:57:09,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 05:57:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:09,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 05:57:09,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:10,098 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 11 treesize of output 7 [2022-01-18 05:57:10,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:10,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:10,283 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:57:10,284 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 14 treesize of output 18 [2022-01-18 05:57:10,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:10,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767558006] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:10,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:10,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 05:57:10,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611950194] [2022-01-18 05:57:10,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:10,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:57:10,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:10,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:57:10,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:57:10,443 INFO L87 Difference]: Start difference. First operand 152 states and 350 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:10,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:10,954 INFO L93 Difference]: Finished difference Result 358 states and 819 transitions. [2022-01-18 05:57:10,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:57:10,955 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 05:57:10,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:10,960 INFO L225 Difference]: With dead ends: 358 [2022-01-18 05:57:10,960 INFO L226 Difference]: Without dead ends: 268 [2022-01-18 05:57:10,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 05:57:10,964 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 251 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:10,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 115 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:57:10,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-01-18 05:57:10,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 185. [2022-01-18 05:57:10,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.342391304347826) internal successors, (431), 184 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:10,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 431 transitions. [2022-01-18 05:57:10,988 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 431 transitions. Word has length 25 [2022-01-18 05:57:10,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:10,988 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 431 transitions. [2022-01-18 05:57:10,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:10,989 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 431 transitions. [2022-01-18 05:57:10,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 05:57:10,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:10,991 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:11,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 05:57:11,218 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 [2022-01-18 05:57:11,219 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:57:11,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:11,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1335000105, now seen corresponding path program 2 times [2022-01-18 05:57:11,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:11,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192936902] [2022-01-18 05:57:11,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:11,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:11,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:11,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:11,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192936902] [2022-01-18 05:57:11,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192936902] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:11,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258101399] [2022-01-18 05:57:11,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:57:11,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:11,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:11,264 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:57:11,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 05:57:11,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:57:11,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:57:11,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 05:57:11,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:11,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:11,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:11,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:11,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258101399] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:11,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:11,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 05:57:11,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619263025] [2022-01-18 05:57:11,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:11,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:57:11,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:11,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:57:11,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:57:11,421 INFO L87 Difference]: Start difference. First operand 185 states and 431 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:11,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:11,447 INFO L93 Difference]: Finished difference Result 496 states and 1143 transitions. [2022-01-18 05:57:11,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 05:57:11,452 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 05:57:11,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:11,460 INFO L225 Difference]: With dead ends: 496 [2022-01-18 05:57:11,460 INFO L226 Difference]: Without dead ends: 454 [2022-01-18 05:57:11,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:57:11,461 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 42 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:11,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 65 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:57:11,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-01-18 05:57:11,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 336. [2022-01-18 05:57:11,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.4298507462686567) internal successors, (814), 335 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:11,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 814 transitions. [2022-01-18 05:57:11,493 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 814 transitions. Word has length 28 [2022-01-18 05:57:11,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:11,493 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 814 transitions. [2022-01-18 05:57:11,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:11,493 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 814 transitions. [2022-01-18 05:57:11,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 05:57:11,499 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:11,499 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:11,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 05:57:11,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:11,700 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:57:11,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:11,701 INFO L85 PathProgramCache]: Analyzing trace with hash -528291211, now seen corresponding path program 3 times [2022-01-18 05:57:11,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:11,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277235405] [2022-01-18 05:57:11,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:11,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:11,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:11,916 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:11,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:11,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277235405] [2022-01-18 05:57:11,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277235405] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:11,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442016347] [2022-01-18 05:57:11,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:57:11,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:11,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:11,918 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:57:11,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 05:57:11,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:57:11,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:57:11,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:57:11,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:12,311 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 05:57:12,311 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 25 treesize of output 13 [2022-01-18 05:57:12,399 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:12,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:12,626 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 05:57:12,627 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 27 treesize of output 51 [2022-01-18 05:57:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:12,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442016347] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:12,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:12,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-01-18 05:57:12,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941402759] [2022-01-18 05:57:12,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:12,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 05:57:12,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:12,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 05:57:12,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 05:57:12,863 INFO L87 Difference]: Start difference. First operand 336 states and 814 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:19,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:19,207 INFO L93 Difference]: Finished difference Result 2570 states and 6225 transitions. [2022-01-18 05:57:19,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-01-18 05:57:19,208 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 05:57:19,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:19,216 INFO L225 Difference]: With dead ends: 2570 [2022-01-18 05:57:19,216 INFO L226 Difference]: Without dead ends: 1697 [2022-01-18 05:57:19,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11757 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=5243, Invalid=26977, Unknown=0, NotChecked=0, Total=32220 [2022-01-18 05:57:19,228 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 1193 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 1703 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 2201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 1703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:19,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1193 Valid, 512 Invalid, 2201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 1703 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 05:57:19,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2022-01-18 05:57:19,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 421. [2022-01-18 05:57:19,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.4642857142857144) internal successors, (1035), 420 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:19,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1035 transitions. [2022-01-18 05:57:19,248 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1035 transitions. Word has length 31 [2022-01-18 05:57:19,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:19,248 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 1035 transitions. [2022-01-18 05:57:19,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:19,248 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1035 transitions. [2022-01-18 05:57:19,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 05:57:19,250 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:19,250 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:19,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 05:57:19,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:19,459 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:57:19,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:19,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1420855431, now seen corresponding path program 4 times [2022-01-18 05:57:19,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:19,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832578840] [2022-01-18 05:57:19,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:19,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:19,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:19,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:19,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832578840] [2022-01-18 05:57:19,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832578840] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:19,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270653875] [2022-01-18 05:57:19,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:57:19,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:19,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:19,649 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:57:19,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 05:57:19,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:57:19,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:57:19,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:57:19,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:19,977 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 05:57:19,977 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 25 treesize of output 13 [2022-01-18 05:57:20,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:20,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:20,273 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 05:57:20,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 51 [2022-01-18 05:57:20,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:20,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270653875] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:20,499 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:20,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-01-18 05:57:20,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008617028] [2022-01-18 05:57:20,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:20,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:57:20,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:20,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:57:20,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:57:20,501 INFO L87 Difference]: Start difference. First operand 421 states and 1035 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 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) [2022-01-18 05:57:24,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:24,545 INFO L93 Difference]: Finished difference Result 2028 states and 4820 transitions. [2022-01-18 05:57:24,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-18 05:57:24,546 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 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 31 [2022-01-18 05:57:24,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:24,559 INFO L225 Difference]: With dead ends: 2028 [2022-01-18 05:57:24,560 INFO L226 Difference]: Without dead ends: 1858 [2022-01-18 05:57:24,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5973 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3143, Invalid=14413, Unknown=0, NotChecked=0, Total=17556 [2022-01-18 05:57:24,565 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 550 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 1656 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 1886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 1656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:24,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 293 Invalid, 1886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 1656 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 05:57:24,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2022-01-18 05:57:24,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 477. [2022-01-18 05:57:24,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.4978991596638656) internal successors, (1189), 476 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:24,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1189 transitions. [2022-01-18 05:57:24,585 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1189 transitions. Word has length 31 [2022-01-18 05:57:24,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:24,585 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 1189 transitions. [2022-01-18 05:57:24,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 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) [2022-01-18 05:57:24,586 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1189 transitions. [2022-01-18 05:57:24,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 05:57:24,587 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:24,587 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:24,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 05:57:24,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:24,809 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:57:24,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:24,809 INFO L85 PathProgramCache]: Analyzing trace with hash 256367733, now seen corresponding path program 5 times [2022-01-18 05:57:24,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:24,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130286714] [2022-01-18 05:57:24,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:24,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:25,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:25,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130286714] [2022-01-18 05:57:25,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130286714] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:25,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41096033] [2022-01-18 05:57:25,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:57:25,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:25,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:25,012 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:57:25,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 05:57:25,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:57:25,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:57:25,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:57:25,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:25,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:57:25,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:57:25,448 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 25 treesize of output 13 [2022-01-18 05:57:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:25,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:25,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:57:25,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:57:25,745 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:57:25,745 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 25 treesize of output 51 [2022-01-18 05:57:25,948 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:25,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41096033] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:25,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:25,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-01-18 05:57:25,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598797460] [2022-01-18 05:57:25,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:25,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 05:57:25,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:25,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 05:57:25,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 05:57:25,950 INFO L87 Difference]: Start difference. First operand 477 states and 1189 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:36,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:36,823 INFO L93 Difference]: Finished difference Result 6877 states and 16443 transitions. [2022-01-18 05:57:36,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 261 states. [2022-01-18 05:57:36,824 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 05:57:36,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:36,846 INFO L225 Difference]: With dead ends: 6877 [2022-01-18 05:57:36,846 INFO L226 Difference]: Without dead ends: 5277 [2022-01-18 05:57:36,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 64 SyntacticMatches, 8 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38288 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=13473, Invalid=70917, Unknown=0, NotChecked=0, Total=84390 [2022-01-18 05:57:36,855 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 1278 mSDsluCounter, 1871 mSDsCounter, 0 mSdLazyCounter, 2737 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1278 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 3667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 2737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:36,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1278 Valid, 1016 Invalid, 3667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 2737 Invalid, 0 Unknown, 323 Unchecked, 1.6s Time] [2022-01-18 05:57:36,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5277 states. [2022-01-18 05:57:36,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5277 to 959. [2022-01-18 05:57:36,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 2.6085594989561587) internal successors, (2499), 958 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:36,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 2499 transitions. [2022-01-18 05:57:36,907 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 2499 transitions. Word has length 31 [2022-01-18 05:57:36,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:36,908 INFO L470 AbstractCegarLoop]: Abstraction has 959 states and 2499 transitions. [2022-01-18 05:57:36,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:36,908 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 2499 transitions. [2022-01-18 05:57:36,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 05:57:36,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:36,914 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:36,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 05:57:37,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:37,115 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:57:37,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:37,116 INFO L85 PathProgramCache]: Analyzing trace with hash 693727769, now seen corresponding path program 6 times [2022-01-18 05:57:37,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:37,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708304179] [2022-01-18 05:57:37,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:37,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:57:37,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:37,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708304179] [2022-01-18 05:57:37,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708304179] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:37,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105445950] [2022-01-18 05:57:37,281 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:57:37,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:37,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:37,282 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:57:37,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 05:57:37,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:57:37,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:57:37,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:57:37,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:37,568 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 05:57:37,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 05:57:37,627 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:37,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:37,798 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 05:57:37,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 51 [2022-01-18 05:57:37,966 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:37,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105445950] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:37,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:37,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 31 [2022-01-18 05:57:37,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420647210] [2022-01-18 05:57:37,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:37,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:57:37,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:37,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:57:37,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:57:37,967 INFO L87 Difference]: Start difference. First operand 959 states and 2499 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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) [2022-01-18 05:57:43,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:43,803 INFO L93 Difference]: Finished difference Result 5655 states and 14099 transitions. [2022-01-18 05:57:43,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2022-01-18 05:57:43,803 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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 31 [2022-01-18 05:57:43,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:43,818 INFO L225 Difference]: With dead ends: 5655 [2022-01-18 05:57:43,818 INFO L226 Difference]: Without dead ends: 5002 [2022-01-18 05:57:43,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16724 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=6779, Invalid=32623, Unknown=0, NotChecked=0, Total=39402 [2022-01-18 05:57:43,823 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 921 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 2189 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 921 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 2590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 2189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:43,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [921 Valid, 845 Invalid, 2590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 2189 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 05:57:43,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5002 states. [2022-01-18 05:57:43,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5002 to 1343. [2022-01-18 05:57:43,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 2.615499254843517) internal successors, (3510), 1342 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:43,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 3510 transitions. [2022-01-18 05:57:43,877 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 3510 transitions. Word has length 31 [2022-01-18 05:57:43,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:43,878 INFO L470 AbstractCegarLoop]: Abstraction has 1343 states and 3510 transitions. [2022-01-18 05:57:43,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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) [2022-01-18 05:57:43,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 3510 transitions. [2022-01-18 05:57:43,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 05:57:43,880 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:43,881 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:43,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 05:57:44,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:44,106 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:57:44,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:44,106 INFO L85 PathProgramCache]: Analyzing trace with hash -2111481487, now seen corresponding path program 7 times [2022-01-18 05:57:44,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:44,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522116368] [2022-01-18 05:57:44,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:44,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:44,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:44,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:44,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522116368] [2022-01-18 05:57:44,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522116368] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:44,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892915976] [2022-01-18 05:57:44,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:57:44,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:44,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:44,272 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:57:44,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 05:57:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:44,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:57:44,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:44,577 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 05:57:44,578 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 25 treesize of output 13 [2022-01-18 05:57:44,641 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:44,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:44,829 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 05:57:44,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 51 [2022-01-18 05:57:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:45,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892915976] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:45,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:45,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-01-18 05:57:45,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165828053] [2022-01-18 05:57:45,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:45,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 05:57:45,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:45,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 05:57:45,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 05:57:45,022 INFO L87 Difference]: Start difference. First operand 1343 states and 3510 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:50,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:50,691 INFO L93 Difference]: Finished difference Result 3910 states and 9739 transitions. [2022-01-18 05:57:50,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-01-18 05:57:50,695 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 05:57:50,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:50,706 INFO L225 Difference]: With dead ends: 3910 [2022-01-18 05:57:50,706 INFO L226 Difference]: Without dead ends: 2974 [2022-01-18 05:57:50,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10853 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5059, Invalid=25043, Unknown=0, NotChecked=0, Total=30102 [2022-01-18 05:57:50,709 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 754 mSDsluCounter, 1293 mSDsCounter, 0 mSdLazyCounter, 2594 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 2934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 2594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:50,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [754 Valid, 647 Invalid, 2934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 2594 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 05:57:50,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2974 states. [2022-01-18 05:57:50,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2974 to 1401. [2022-01-18 05:57:50,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1401 states, 1400 states have (on average 2.6135714285714284) internal successors, (3659), 1400 states have internal predecessors, (3659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:50,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 3659 transitions. [2022-01-18 05:57:50,745 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 3659 transitions. Word has length 31 [2022-01-18 05:57:50,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:50,745 INFO L470 AbstractCegarLoop]: Abstraction has 1401 states and 3659 transitions. [2022-01-18 05:57:50,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:50,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 3659 transitions. [2022-01-18 05:57:50,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 05:57:50,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:50,748 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:50,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-18 05:57:50,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:50,970 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:57:50,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:50,970 INFO L85 PathProgramCache]: Analyzing trace with hash -911119041, now seen corresponding path program 8 times [2022-01-18 05:57:50,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:50,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368677957] [2022-01-18 05:57:50,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:50,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:50,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:51,139 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:57:51,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:51,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368677957] [2022-01-18 05:57:51,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368677957] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:51,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649327674] [2022-01-18 05:57:51,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:57:51,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:51,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:51,141 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:57:51,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 05:57:51,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:57:51,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:57:51,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:57:51,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:51,415 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 05:57:51,416 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 25 treesize of output 13 [2022-01-18 05:57:51,475 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:51,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:51,635 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 05:57:51,635 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 27 treesize of output 51 [2022-01-18 05:57:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:51,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649327674] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:51,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:51,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 31 [2022-01-18 05:57:51,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039891769] [2022-01-18 05:57:51,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:51,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:57:51,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:51,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:57:51,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:57:51,793 INFO L87 Difference]: Start difference. First operand 1401 states and 3659 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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) [2022-01-18 05:57:55,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:55,378 INFO L93 Difference]: Finished difference Result 3992 states and 9944 transitions. [2022-01-18 05:57:55,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-18 05:57:55,379 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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 31 [2022-01-18 05:57:55,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:55,387 INFO L225 Difference]: With dead ends: 3992 [2022-01-18 05:57:55,388 INFO L226 Difference]: Without dead ends: 3412 [2022-01-18 05:57:55,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6022 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3275, Invalid=13495, Unknown=0, NotChecked=0, Total=16770 [2022-01-18 05:57:55,390 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 761 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 1616 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 1994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 1616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:55,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 453 Invalid, 1994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 1616 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 05:57:55,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3412 states. [2022-01-18 05:57:55,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3412 to 1525. [2022-01-18 05:57:55,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1524 states have (on average 2.6122047244094486) internal successors, (3981), 1524 states have internal predecessors, (3981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:55,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 3981 transitions. [2022-01-18 05:57:55,462 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 3981 transitions. Word has length 31 [2022-01-18 05:57:55,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:55,462 INFO L470 AbstractCegarLoop]: Abstraction has 1525 states and 3981 transitions. [2022-01-18 05:57:55,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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) [2022-01-18 05:57:55,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 3981 transitions. [2022-01-18 05:57:55,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 05:57:55,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:55,465 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:55,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 05:57:55,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-18 05:57:55,679 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:57:55,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:55,680 INFO L85 PathProgramCache]: Analyzing trace with hash -2139987936, now seen corresponding path program 9 times [2022-01-18 05:57:55,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:55,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647350398] [2022-01-18 05:57:55,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:55,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:55,727 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:55,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:55,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647350398] [2022-01-18 05:57:55,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647350398] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:55,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394360309] [2022-01-18 05:57:55,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:57:55,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:55,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:55,729 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:57:55,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 05:57:55,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 05:57:55,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:57:55,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:57:55,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:55,827 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:55,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:55,878 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:55,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394360309] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:55,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:55,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-18 05:57:55,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525057360] [2022-01-18 05:57:55,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:55,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 05:57:55,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:55,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 05:57:55,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-18 05:57:55,880 INFO L87 Difference]: Start difference. First operand 1525 states and 3981 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:55,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:55,915 INFO L93 Difference]: Finished difference Result 2453 states and 6384 transitions. [2022-01-18 05:57:55,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:57:55,915 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 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 34 [2022-01-18 05:57:55,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:55,920 INFO L225 Difference]: With dead ends: 2453 [2022-01-18 05:57:55,920 INFO L226 Difference]: Without dead ends: 2396 [2022-01-18 05:57:55,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-18 05:57:55,920 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 79 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:55,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 70 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:57:55,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2022-01-18 05:57:55,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 2033. [2022-01-18 05:57:55,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 2.6663385826771653) internal successors, (5418), 2032 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:55,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 5418 transitions. [2022-01-18 05:57:55,959 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 5418 transitions. Word has length 34 [2022-01-18 05:57:55,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:55,959 INFO L470 AbstractCegarLoop]: Abstraction has 2033 states and 5418 transitions. [2022-01-18 05:57:55,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:55,960 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 5418 transitions. [2022-01-18 05:57:55,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 05:57:55,964 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:55,964 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:55,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 05:57:56,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:56,186 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:57:56,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:56,187 INFO L85 PathProgramCache]: Analyzing trace with hash -293873602, now seen corresponding path program 10 times [2022-01-18 05:57:56,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:56,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865985940] [2022-01-18 05:57:56,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:56,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:56,439 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:56,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:56,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865985940] [2022-01-18 05:57:56,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865985940] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:56,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886586410] [2022-01-18 05:57:56,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:57:56,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:56,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:56,440 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:57:56,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 05:57:56,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:57:56,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:57:56,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 05:57:56,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:56,899 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 05:57:56,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-01-18 05:57:56,970 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:56,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:57,335 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 05:57:57,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-01-18 05:57:57,911 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:57,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886586410] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:57,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:57,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-01-18 05:57:57,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911569788] [2022-01-18 05:57:57,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:57,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 05:57:57,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:57,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 05:57:57,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1794, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 05:57:57,914 INFO L87 Difference]: Start difference. First operand 2033 states and 5418 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:10,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:58:10,039 INFO L93 Difference]: Finished difference Result 7888 states and 19557 transitions. [2022-01-18 05:58:10,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 261 states. [2022-01-18 05:58:10,040 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 05:58:10,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:58:10,055 INFO L225 Difference]: With dead ends: 7888 [2022-01-18 05:58:10,056 INFO L226 Difference]: Without dead ends: 6844 [2022-01-18 05:58:10,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36898 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=13021, Invalid=78485, Unknown=0, NotChecked=0, Total=91506 [2022-01-18 05:58:10,061 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 1619 mSDsluCounter, 2702 mSDsCounter, 0 mSdLazyCounter, 4785 mSolverCounterSat, 588 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1619 SdHoareTripleChecker+Valid, 1449 SdHoareTripleChecker+Invalid, 5373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 588 IncrementalHoareTripleChecker+Valid, 4785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:58:10,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1619 Valid, 1449 Invalid, 5373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [588 Valid, 4785 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-18 05:58:10,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6844 states. [2022-01-18 05:58:10,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6844 to 2385. [2022-01-18 05:58:10,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2385 states, 2384 states have (on average 2.670302013422819) internal successors, (6366), 2384 states have internal predecessors, (6366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:10,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2385 states to 2385 states and 6366 transitions. [2022-01-18 05:58:10,142 INFO L78 Accepts]: Start accepts. Automaton has 2385 states and 6366 transitions. Word has length 37 [2022-01-18 05:58:10,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:58:10,142 INFO L470 AbstractCegarLoop]: Abstraction has 2385 states and 6366 transitions. [2022-01-18 05:58:10,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:10,142 INFO L276 IsEmpty]: Start isEmpty. Operand 2385 states and 6366 transitions. [2022-01-18 05:58:10,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 05:58:10,147 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:58:10,147 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:58:10,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 05:58:10,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-18 05:58:10,368 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:58:10,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:58:10,369 INFO L85 PathProgramCache]: Analyzing trace with hash 609080936, now seen corresponding path program 11 times [2022-01-18 05:58:10,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:58:10,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069452566] [2022-01-18 05:58:10,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:58:10,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:58:10,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:58:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:10,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:58:10,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069452566] [2022-01-18 05:58:10,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069452566] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:58:10,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508575603] [2022-01-18 05:58:10,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:58:10,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:58:10,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:58:10,618 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:58:10,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 05:58:10,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 05:58:10,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:58:10,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 05:58:10,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:58:11,100 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 05:58:11,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-01-18 05:58:11,160 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:11,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:58:11,536 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 05:58:11,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-01-18 05:58:12,000 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:12,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508575603] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:58:12,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:58:12,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-01-18 05:58:12,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866523889] [2022-01-18 05:58:12,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:58:12,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 05:58:12,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:58:12,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 05:58:12,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1805, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 05:58:12,003 INFO L87 Difference]: Start difference. First operand 2385 states and 6366 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:29,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:58:29,812 INFO L93 Difference]: Finished difference Result 11643 states and 28850 transitions. [2022-01-18 05:58:29,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 336 states. [2022-01-18 05:58:29,812 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 05:58:29,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:58:29,836 INFO L225 Difference]: With dead ends: 11643 [2022-01-18 05:58:29,836 INFO L226 Difference]: Without dead ends: 10173 [2022-01-18 05:58:29,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 376 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59584 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=19211, Invalid=123295, Unknown=0, NotChecked=0, Total=142506 [2022-01-18 05:58:29,842 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 1401 mSDsluCounter, 3029 mSDsCounter, 0 mSdLazyCounter, 5917 mSolverCounterSat, 736 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1401 SdHoareTripleChecker+Valid, 1490 SdHoareTripleChecker+Invalid, 6653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 736 IncrementalHoareTripleChecker+Valid, 5917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:58:29,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1401 Valid, 1490 Invalid, 6653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [736 Valid, 5917 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-18 05:58:29,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10173 states. [2022-01-18 05:58:29,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10173 to 2603. [2022-01-18 05:58:29,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.68293620292083) internal successors, (6981), 2602 states have internal predecessors, (6981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:29,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 6981 transitions. [2022-01-18 05:58:29,942 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 6981 transitions. Word has length 37 [2022-01-18 05:58:29,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:58:29,942 INFO L470 AbstractCegarLoop]: Abstraction has 2603 states and 6981 transitions. [2022-01-18 05:58:29,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:29,943 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 6981 transitions. [2022-01-18 05:58:29,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 05:58:29,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:58:29,947 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:58:29,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 05:58:30,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-18 05:58:30,171 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:58:30,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:58:30,172 INFO L85 PathProgramCache]: Analyzing trace with hash 725042942, now seen corresponding path program 12 times [2022-01-18 05:58:30,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:58:30,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344759286] [2022-01-18 05:58:30,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:58:30,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:58:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:58:30,397 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:30,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:58:30,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344759286] [2022-01-18 05:58:30,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344759286] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:58:30,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745680769] [2022-01-18 05:58:30,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:58:30,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:58:30,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:58:30,399 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:58:30,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 05:58:30,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 05:58:30,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:58:30,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 05:58:30,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:58:31,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:58:31,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:58:31,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:58:31,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:58:31,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:58:31,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:58:31,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-01-18 05:58:31,443 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:31,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:58:32,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:58:32,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:58:32,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:58:32,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:58:32,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:58:32,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:58:32,153 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:58:32,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 32 treesize of output 92 [2022-01-18 05:58:32,829 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:32,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745680769] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:58:32,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:58:32,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-01-18 05:58:32,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694556169] [2022-01-18 05:58:32,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:58:32,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 05:58:32,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:58:32,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 05:58:32,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1740, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 05:58:32,831 INFO L87 Difference]: Start difference. First operand 2603 states and 6981 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:35,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:58:35,732 INFO L93 Difference]: Finished difference Result 4636 states and 12333 transitions. [2022-01-18 05:58:35,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-18 05:58:35,733 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 05:58:35,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:58:35,742 INFO L225 Difference]: With dead ends: 4636 [2022-01-18 05:58:35,742 INFO L226 Difference]: Without dead ends: 4587 [2022-01-18 05:58:35,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 71 SyntacticMatches, 7 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4449 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2197, Invalid=11845, Unknown=0, NotChecked=0, Total=14042 [2022-01-18 05:58:35,744 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 288 mSDsluCounter, 1668 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 2493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1733 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:58:35,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 501 Invalid, 2493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 725 Invalid, 0 Unknown, 1733 Unchecked, 0.3s Time] [2022-01-18 05:58:35,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4587 states. [2022-01-18 05:58:35,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4587 to 2757. [2022-01-18 05:58:35,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2757 states, 2756 states have (on average 2.6756168359941945) internal successors, (7374), 2756 states have internal predecessors, (7374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:35,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 7374 transitions. [2022-01-18 05:58:35,805 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 7374 transitions. Word has length 37 [2022-01-18 05:58:35,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:58:35,805 INFO L470 AbstractCegarLoop]: Abstraction has 2757 states and 7374 transitions. [2022-01-18 05:58:35,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:35,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 7374 transitions. [2022-01-18 05:58:35,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 05:58:35,810 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:58:35,811 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:58:35,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 05:58:36,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-18 05:58:36,033 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:58:36,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:58:36,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1062011650, now seen corresponding path program 13 times [2022-01-18 05:58:36,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:58:36,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850011455] [2022-01-18 05:58:36,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:58:36,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:58:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:58:36,305 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:36,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:58:36,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850011455] [2022-01-18 05:58:36,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850011455] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:58:36,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642004867] [2022-01-18 05:58:36,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:58:36,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:58:36,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:58:36,307 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:58:36,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 05:58:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:58:36,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 05:58:36,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:58:36,755 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 05:58:36,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-01-18 05:58:36,832 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:36,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:58:37,219 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 05:58:37,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-01-18 05:58:37,649 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:37,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642004867] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:58:37,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:58:37,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-01-18 05:58:37,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117256519] [2022-01-18 05:58:37,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:58:37,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 05:58:37,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:58:37,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 05:58:37,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1804, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 05:58:37,652 INFO L87 Difference]: Start difference. First operand 2757 states and 7374 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:55,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:58:55,810 INFO L93 Difference]: Finished difference Result 13846 states and 34888 transitions. [2022-01-18 05:58:55,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 350 states. [2022-01-18 05:58:55,811 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 05:58:55,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:58:55,829 INFO L225 Difference]: With dead ends: 13846 [2022-01-18 05:58:55,829 INFO L226 Difference]: Without dead ends: 12834 [2022-01-18 05:58:55,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 390 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65124 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=20027, Invalid=133245, Unknown=0, NotChecked=0, Total=153272 [2022-01-18 05:58:55,836 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 1134 mSDsluCounter, 3409 mSDsCounter, 0 mSdLazyCounter, 5924 mSolverCounterSat, 621 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1134 SdHoareTripleChecker+Valid, 1784 SdHoareTripleChecker+Invalid, 6545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 621 IncrementalHoareTripleChecker+Valid, 5924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:58:55,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1134 Valid, 1784 Invalid, 6545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [621 Valid, 5924 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-18 05:58:55,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12834 states. [2022-01-18 05:58:55,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12834 to 3327. [2022-01-18 05:58:56,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3326 states have (on average 2.7194828622970535) internal successors, (9045), 3326 states have internal predecessors, (9045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:56,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 9045 transitions. [2022-01-18 05:58:56,010 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 9045 transitions. Word has length 37 [2022-01-18 05:58:56,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:58:56,010 INFO L470 AbstractCegarLoop]: Abstraction has 3327 states and 9045 transitions. [2022-01-18 05:58:56,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:56,011 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 9045 transitions. [2022-01-18 05:58:56,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 05:58:56,017 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:58:56,017 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:58:56,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 05:58:56,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-18 05:58:56,232 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:58:56,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:58:56,232 INFO L85 PathProgramCache]: Analyzing trace with hash -2026265026, now seen corresponding path program 14 times [2022-01-18 05:58:56,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:58:56,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485086969] [2022-01-18 05:58:56,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:58:56,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:58:56,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:58:56,459 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:56,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:58:56,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485086969] [2022-01-18 05:58:56,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485086969] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:58:56,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091342745] [2022-01-18 05:58:56,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:58:56,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:58:56,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:58:56,461 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:58:56,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 05:58:56,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:58:56,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:58:56,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 05:58:56,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:58:56,982 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 05:58:56,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-01-18 05:58:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:57,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:58:57,408 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 05:58:57,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-01-18 05:58:57,884 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:57,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091342745] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:58:57,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:58:57,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-01-18 05:58:57,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449381954] [2022-01-18 05:58:57,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:58:57,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 05:58:57,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:58:57,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 05:58:57,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1801, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 05:58:57,885 INFO L87 Difference]: Start difference. First operand 3327 states and 9045 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:17,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:17,312 INFO L93 Difference]: Finished difference Result 16809 states and 42113 transitions. [2022-01-18 05:59:17,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 373 states. [2022-01-18 05:59:17,313 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 05:59:17,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:17,333 INFO L225 Difference]: With dead ends: 16809 [2022-01-18 05:59:17,333 INFO L226 Difference]: Without dead ends: 14346 [2022-01-18 05:59:17,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76932 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=24383, Invalid=147427, Unknown=0, NotChecked=0, Total=171810 [2022-01-18 05:59:17,340 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 1850 mSDsluCounter, 2489 mSDsCounter, 0 mSdLazyCounter, 4610 mSolverCounterSat, 915 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1850 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 5525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 915 IncrementalHoareTripleChecker+Valid, 4610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:17,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1850 Valid, 1276 Invalid, 5525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [915 Valid, 4610 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-18 05:59:17,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14346 states. [2022-01-18 05:59:17,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14346 to 3535. [2022-01-18 05:59:17,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3535 states, 3534 states have (on average 2.7190152801358236) internal successors, (9609), 3534 states have internal predecessors, (9609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:17,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 9609 transitions. [2022-01-18 05:59:17,487 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 9609 transitions. Word has length 37 [2022-01-18 05:59:17,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:17,488 INFO L470 AbstractCegarLoop]: Abstraction has 3535 states and 9609 transitions. [2022-01-18 05:59:17,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:17,488 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 9609 transitions. [2022-01-18 05:59:17,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 05:59:17,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:17,495 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:17,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 05:59:17,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:17,708 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:59:17,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:17,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1277334372, now seen corresponding path program 15 times [2022-01-18 05:59:17,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:17,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830819023] [2022-01-18 05:59:17,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:17,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:17,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:17,975 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:17,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:17,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830819023] [2022-01-18 05:59:17,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830819023] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:17,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233381601] [2022-01-18 05:59:17,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:59:17,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:17,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:17,980 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:59:17,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 05:59:18,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 05:59:18,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:18,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 05:59:18,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:18,469 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 05:59:18,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-01-18 05:59:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:18,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:18,919 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 05:59:18,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 39 treesize of output 103 [2022-01-18 05:59:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:19,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233381601] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:19,495 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:19,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-01-18 05:59:19,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557846835] [2022-01-18 05:59:19,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:19,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 05:59:19,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:19,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 05:59:19,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1810, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 05:59:19,496 INFO L87 Difference]: Start difference. First operand 3535 states and 9609 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:40,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:40,827 INFO L93 Difference]: Finished difference Result 15579 states and 39558 transitions. [2022-01-18 05:59:40,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 397 states. [2022-01-18 05:59:40,828 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 05:59:40,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:40,847 INFO L225 Difference]: With dead ends: 15579 [2022-01-18 05:59:40,847 INFO L226 Difference]: Without dead ends: 14122 [2022-01-18 05:59:40,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 437 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86518 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=24782, Invalid=167500, Unknown=0, NotChecked=0, Total=192282 [2022-01-18 05:59:40,856 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 1551 mSDsluCounter, 3347 mSDsCounter, 0 mSdLazyCounter, 6306 mSolverCounterSat, 820 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1551 SdHoareTripleChecker+Valid, 1653 SdHoareTripleChecker+Invalid, 7126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 820 IncrementalHoareTripleChecker+Valid, 6306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:40,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1551 Valid, 1653 Invalid, 7126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [820 Valid, 6306 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-01-18 05:59:40,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14122 states. [2022-01-18 05:59:40,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14122 to 4322. [2022-01-18 05:59:40,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4322 states, 4321 states have (on average 2.7283036334181903) internal successors, (11789), 4321 states have internal predecessors, (11789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:40,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4322 states to 4322 states and 11789 transitions. [2022-01-18 05:59:40,989 INFO L78 Accepts]: Start accepts. Automaton has 4322 states and 11789 transitions. Word has length 37 [2022-01-18 05:59:40,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:40,989 INFO L470 AbstractCegarLoop]: Abstraction has 4322 states and 11789 transitions. [2022-01-18 05:59:40,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:40,989 INFO L276 IsEmpty]: Start isEmpty. Operand 4322 states and 11789 transitions. [2022-01-18 05:59:40,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 05:59:40,996 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:40,996 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:41,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 05:59:41,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 05:59:41,215 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:59:41,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:41,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1393296378, now seen corresponding path program 16 times [2022-01-18 05:59:41,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:41,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134245661] [2022-01-18 05:59:41,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:41,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:41,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:41,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:41,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134245661] [2022-01-18 05:59:41,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134245661] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:41,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180067994] [2022-01-18 05:59:41,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:59:41,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:41,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:41,500 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:59:41,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 05:59:41,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:59:41,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:41,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 05:59:41,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:41,979 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 05:59:41,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-01-18 05:59:42,036 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:42,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:42,410 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 05:59:42,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-01-18 05:59:42,882 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:42,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180067994] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:42,882 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:42,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-01-18 05:59:42,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584282016] [2022-01-18 05:59:42,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:42,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 05:59:42,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:42,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 05:59:42,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1811, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 05:59:42,884 INFO L87 Difference]: Start difference. First operand 4322 states and 11789 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:04,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:00:04,481 INFO L93 Difference]: Finished difference Result 19425 states and 50281 transitions. [2022-01-18 06:00:04,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 406 states. [2022-01-18 06:00:04,481 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 06:00:04,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:00:04,510 INFO L225 Difference]: With dead ends: 19425 [2022-01-18 06:00:04,510 INFO L226 Difference]: Without dead ends: 18389 [2022-01-18 06:00:04,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 446 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88585 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=23496, Invalid=176760, Unknown=0, NotChecked=0, Total=200256 [2022-01-18 06:00:04,520 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 1365 mSDsluCounter, 4482 mSDsCounter, 0 mSdLazyCounter, 7768 mSolverCounterSat, 753 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1365 SdHoareTripleChecker+Valid, 2251 SdHoareTripleChecker+Invalid, 8521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 753 IncrementalHoareTripleChecker+Valid, 7768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:00:04,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1365 Valid, 2251 Invalid, 8521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [753 Valid, 7768 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-01-18 06:00:04,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18389 states. [2022-01-18 06:00:04,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18389 to 5336. [2022-01-18 06:00:04,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5336 states, 5335 states have (on average 2.7321462043111526) internal successors, (14576), 5335 states have internal predecessors, (14576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:04,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5336 states to 5336 states and 14576 transitions. [2022-01-18 06:00:04,766 INFO L78 Accepts]: Start accepts. Automaton has 5336 states and 14576 transitions. Word has length 37 [2022-01-18 06:00:04,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:00:04,766 INFO L470 AbstractCegarLoop]: Abstraction has 5336 states and 14576 transitions. [2022-01-18 06:00:04,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:04,767 INFO L276 IsEmpty]: Start isEmpty. Operand 5336 states and 14576 transitions. [2022-01-18 06:00:04,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 06:00:04,776 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:00:04,776 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:00:04,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 06:00:04,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:04,991 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:00:04,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:00:04,992 INFO L85 PathProgramCache]: Analyzing trace with hash 730758682, now seen corresponding path program 17 times [2022-01-18 06:00:04,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:00:04,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164985569] [2022-01-18 06:00:04,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:00:04,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:00:04,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:00:05,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:00:05,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164985569] [2022-01-18 06:00:05,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164985569] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:00:05,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353923131] [2022-01-18 06:00:05,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:00:05,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:05,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:00:05,211 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:00:05,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 06:00:05,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 06:00:05,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:00:05,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 06:00:05,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:00:05,664 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 06:00:05,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-01-18 06:00:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:05,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:00:06,104 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 06:00:06,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-01-18 06:00:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:06,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353923131] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:00:06,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:00:06,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-01-18 06:00:06,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264961710] [2022-01-18 06:00:06,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:00:06,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 06:00:06,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:00:06,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 06:00:06,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1732, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 06:00:06,541 INFO L87 Difference]: Start difference. First operand 5336 states and 14576 transitions. Second operand has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:29,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:00:29,166 INFO L93 Difference]: Finished difference Result 19470 states and 50048 transitions. [2022-01-18 06:00:29,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 420 states. [2022-01-18 06:00:29,166 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 06:00:29,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:00:29,192 INFO L225 Difference]: With dead ends: 19470 [2022-01-18 06:00:29,192 INFO L226 Difference]: Without dead ends: 17725 [2022-01-18 06:00:29,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 459 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99488 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=31398, Invalid=180662, Unknown=0, NotChecked=0, Total=212060 [2022-01-18 06:00:29,202 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 1706 mSDsluCounter, 3325 mSDsCounter, 0 mSdLazyCounter, 5853 mSolverCounterSat, 804 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1706 SdHoareTripleChecker+Valid, 1784 SdHoareTripleChecker+Invalid, 6657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 804 IncrementalHoareTripleChecker+Valid, 5853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:00:29,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1706 Valid, 1784 Invalid, 6657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [804 Valid, 5853 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-18 06:00:29,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17725 states. [2022-01-18 06:00:29,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17725 to 6234. [2022-01-18 06:00:29,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6234 states, 6233 states have (on average 2.7328734156906784) internal successors, (17034), 6233 states have internal predecessors, (17034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:29,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6234 states to 6234 states and 17034 transitions. [2022-01-18 06:00:29,387 INFO L78 Accepts]: Start accepts. Automaton has 6234 states and 17034 transitions. Word has length 37 [2022-01-18 06:00:29,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:00:29,388 INFO L470 AbstractCegarLoop]: Abstraction has 6234 states and 17034 transitions. [2022-01-18 06:00:29,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:29,388 INFO L276 IsEmpty]: Start isEmpty. Operand 6234 states and 17034 transitions. [2022-01-18 06:00:29,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 06:00:29,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:00:29,397 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:00:29,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 06:00:29,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:29,618 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:00:29,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:00:29,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1515417626, now seen corresponding path program 18 times [2022-01-18 06:00:29,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:00:29,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768605800] [2022-01-18 06:00:29,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:00:29,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:00:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:29,839 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:29,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:00:29,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768605800] [2022-01-18 06:00:29,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768605800] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:00:29,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934014586] [2022-01-18 06:00:29,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:00:29,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:29,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:00:29,841 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:00:29,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 06:00:29,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 06:00:29,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:00:29,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 06:00:29,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:00:30,303 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 06:00:30,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-01-18 06:00:30,402 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:30,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:00:30,788 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 06:00:30,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-01-18 06:00:31,277 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:31,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934014586] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:00:31,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:00:31,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-01-18 06:00:31,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373184331] [2022-01-18 06:00:31,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:00:31,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 06:00:31,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:00:31,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 06:00:31,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1726, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 06:00:31,279 INFO L87 Difference]: Start difference. First operand 6234 states and 17034 transitions. Second operand has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:53,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:00:53,692 INFO L93 Difference]: Finished difference Result 31234 states and 81888 transitions. [2022-01-18 06:00:53,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 427 states. [2022-01-18 06:00:53,692 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 06:00:53,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:00:53,750 INFO L225 Difference]: With dead ends: 31234 [2022-01-18 06:00:53,750 INFO L226 Difference]: Without dead ends: 28790 [2022-01-18 06:00:53,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 466 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103084 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=29621, Invalid=188935, Unknown=0, NotChecked=0, Total=218556 [2022-01-18 06:00:53,759 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 2195 mSDsluCounter, 3630 mSDsCounter, 0 mSdLazyCounter, 6351 mSolverCounterSat, 1169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2195 SdHoareTripleChecker+Valid, 1918 SdHoareTripleChecker+Invalid, 7520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1169 IncrementalHoareTripleChecker+Valid, 6351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:00:53,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2195 Valid, 1918 Invalid, 7520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1169 Valid, 6351 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-01-18 06:00:53,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28790 states. [2022-01-18 06:00:54,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28790 to 9104. [2022-01-18 06:00:54,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9104 states, 9103 states have (on average 2.730748105020323) internal successors, (24858), 9103 states have internal predecessors, (24858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:54,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9104 states to 9104 states and 24858 transitions. [2022-01-18 06:00:54,049 INFO L78 Accepts]: Start accepts. Automaton has 9104 states and 24858 transitions. Word has length 37 [2022-01-18 06:00:54,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:00:54,049 INFO L470 AbstractCegarLoop]: Abstraction has 9104 states and 24858 transitions. [2022-01-18 06:00:54,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:54,049 INFO L276 IsEmpty]: Start isEmpty. Operand 9104 states and 24858 transitions. [2022-01-18 06:00:54,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 06:00:54,065 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:00:54,065 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:00:54,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 06:00:54,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:54,289 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:00:54,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:00:54,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1952777662, now seen corresponding path program 19 times [2022-01-18 06:00:54,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:00:54,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41413228] [2022-01-18 06:00:54,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:00:54,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:00:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:00:54,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:00:54,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41413228] [2022-01-18 06:00:54,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41413228] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:00:54,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436294117] [2022-01-18 06:00:54,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:00:54,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:54,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:00:54,508 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:00:54,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 06:00:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:54,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 06:00:54,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:00:54,984 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 06:00:54,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-01-18 06:00:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:55,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:00:55,478 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 06:00:55,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-01-18 06:00:55,951 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:55,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436294117] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:00:55,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:00:55,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 44 [2022-01-18 06:00:55,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535763307] [2022-01-18 06:00:55,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:00:55,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-18 06:00:55,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:00:55,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-18 06:00:55,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1634, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 06:00:55,952 INFO L87 Difference]: Start difference. First operand 9104 states and 24858 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:14,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:01:14,603 INFO L93 Difference]: Finished difference Result 32667 states and 86823 transitions. [2022-01-18 06:01:14,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 354 states. [2022-01-18 06:01:14,604 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 06:01:14,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:01:14,685 INFO L225 Difference]: With dead ends: 32667 [2022-01-18 06:01:14,686 INFO L226 Difference]: Without dead ends: 31087 [2022-01-18 06:01:14,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 392 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71981 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=22308, Invalid=132534, Unknown=0, NotChecked=0, Total=154842 [2022-01-18 06:01:14,695 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 1751 mSDsluCounter, 4735 mSDsCounter, 0 mSdLazyCounter, 7318 mSolverCounterSat, 963 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1751 SdHoareTripleChecker+Valid, 2646 SdHoareTripleChecker+Invalid, 8281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 963 IncrementalHoareTripleChecker+Valid, 7318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:01:14,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1751 Valid, 2646 Invalid, 8281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [963 Valid, 7318 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-01-18 06:01:14,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31087 states. [2022-01-18 06:01:15,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31087 to 11836. [2022-01-18 06:01:15,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11836 states, 11835 states have (on average 2.7356991972961553) internal successors, (32377), 11835 states have internal predecessors, (32377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:15,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11836 states to 11836 states and 32377 transitions. [2022-01-18 06:01:15,163 INFO L78 Accepts]: Start accepts. Automaton has 11836 states and 32377 transitions. Word has length 37 [2022-01-18 06:01:15,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:01:15,163 INFO L470 AbstractCegarLoop]: Abstraction has 11836 states and 32377 transitions. [2022-01-18 06:01:15,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:15,164 INFO L276 IsEmpty]: Start isEmpty. Operand 11836 states and 32377 transitions. [2022-01-18 06:01:15,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 06:01:15,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:01:15,185 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:01:15,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 06:01:15,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:15,410 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:01:15,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:01:15,410 INFO L85 PathProgramCache]: Analyzing trace with hash 732190768, now seen corresponding path program 20 times [2022-01-18 06:01:15,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:01:15,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787380667] [2022-01-18 06:01:15,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:01:15,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:01:15,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:01:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:15,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:01:15,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787380667] [2022-01-18 06:01:15,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787380667] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:01:15,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924706997] [2022-01-18 06:01:15,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:01:15,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:15,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:01:15,637 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:01:15,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 06:01:15,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:01:15,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:01:15,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 06:01:15,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:01:16,134 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 06:01:16,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-01-18 06:01:16,199 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:16,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:01:16,590 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 06:01:16,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-01-18 06:01:17,119 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:17,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924706997] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:01:17,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:01:17,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-01-18 06:01:17,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037964340] [2022-01-18 06:01:17,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:01:17,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 06:01:17,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:01:17,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 06:01:17,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1722, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 06:01:17,121 INFO L87 Difference]: Start difference. First operand 11836 states and 32377 transitions. Second operand has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:34,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:01:34,874 INFO L93 Difference]: Finished difference Result 33473 states and 89499 transitions. [2022-01-18 06:01:34,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 328 states. [2022-01-18 06:01:34,875 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 06:01:34,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:01:34,928 INFO L225 Difference]: With dead ends: 33473 [2022-01-18 06:01:34,928 INFO L226 Difference]: Without dead ends: 31834 [2022-01-18 06:01:34,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 367 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60160 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=20754, Invalid=115038, Unknown=0, NotChecked=0, Total=135792 [2022-01-18 06:01:34,933 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 1317 mSDsluCounter, 2965 mSDsCounter, 0 mSdLazyCounter, 5366 mSolverCounterSat, 708 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1317 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 6074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 708 IncrementalHoareTripleChecker+Valid, 5366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:01:34,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1317 Valid, 1506 Invalid, 6074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [708 Valid, 5366 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-18 06:01:34,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31834 states. [2022-01-18 06:01:35,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31834 to 12555. [2022-01-18 06:01:35,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12555 states, 12554 states have (on average 2.736498327226382) internal successors, (34354), 12554 states have internal predecessors, (34354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:35,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12555 states to 12555 states and 34354 transitions. [2022-01-18 06:01:35,239 INFO L78 Accepts]: Start accepts. Automaton has 12555 states and 34354 transitions. Word has length 37 [2022-01-18 06:01:35,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:01:35,239 INFO L470 AbstractCegarLoop]: Abstraction has 12555 states and 34354 transitions. [2022-01-18 06:01:35,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:35,240 INFO L276 IsEmpty]: Start isEmpty. Operand 12555 states and 34354 transitions. [2022-01-18 06:01:35,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 06:01:35,256 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:01:35,256 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:01:35,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 06:01:35,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-18 06:01:35,457 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:01:35,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:01:35,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1932553214, now seen corresponding path program 21 times [2022-01-18 06:01:35,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:01:35,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092340102] [2022-01-18 06:01:35,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:01:35,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:01:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:01:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:01:35,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:01:35,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092340102] [2022-01-18 06:01:35,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092340102] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:01:35,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107470182] [2022-01-18 06:01:35,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:01:35,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:35,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:01:35,655 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:01:35,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 06:01:35,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 06:01:35,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:01:35,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 06:01:35,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:01:36,117 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 06:01:36,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-01-18 06:01:36,176 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:36,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:01:36,552 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 06:01:36,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 39 treesize of output 103 [2022-01-18 06:01:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:37,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107470182] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:01:37,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:01:37,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 44 [2022-01-18 06:01:37,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259104203] [2022-01-18 06:01:37,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:01:37,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-18 06:01:37,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:01:37,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-18 06:01:37,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1625, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 06:01:37,046 INFO L87 Difference]: Start difference. First operand 12555 states and 34354 transitions. Second operand has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:52,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:01:52,338 INFO L93 Difference]: Finished difference Result 33192 states and 88992 transitions. [2022-01-18 06:01:52,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 282 states. [2022-01-18 06:01:52,338 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 06:01:52,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:01:52,407 INFO L225 Difference]: With dead ends: 33192 [2022-01-18 06:01:52,407 INFO L226 Difference]: Without dead ends: 31790 [2022-01-18 06:01:52,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 320 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43653 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=16321, Invalid=87041, Unknown=0, NotChecked=0, Total=103362 [2022-01-18 06:01:52,412 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 1114 mSDsluCounter, 3202 mSDsCounter, 0 mSdLazyCounter, 5203 mSolverCounterSat, 617 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 1794 SdHoareTripleChecker+Invalid, 5820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 617 IncrementalHoareTripleChecker+Valid, 5203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:01:52,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1114 Valid, 1794 Invalid, 5820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [617 Valid, 5203 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-18 06:01:52,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31790 states. [2022-01-18 06:01:52,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31790 to 13207. [2022-01-18 06:01:52,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13207 states, 13206 states have (on average 2.7397395123428745) internal successors, (36181), 13206 states have internal predecessors, (36181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:52,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13207 states to 13207 states and 36181 transitions. [2022-01-18 06:01:52,806 INFO L78 Accepts]: Start accepts. Automaton has 13207 states and 36181 transitions. Word has length 37 [2022-01-18 06:01:52,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:01:52,806 INFO L470 AbstractCegarLoop]: Abstraction has 13207 states and 36181 transitions. [2022-01-18 06:01:52,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:52,806 INFO L276 IsEmpty]: Start isEmpty. Operand 13207 states and 36181 transitions. [2022-01-18 06:01:52,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 06:01:52,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:01:52,822 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:01:52,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-01-18 06:01:53,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-18 06:01:53,023 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:01:53,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:01:53,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1784070594, now seen corresponding path program 22 times [2022-01-18 06:01:53,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:01:53,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726404590] [2022-01-18 06:01:53,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:01:53,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:01:53,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:01:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:53,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:01:53,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726404590] [2022-01-18 06:01:53,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726404590] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:01:53,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283872597] [2022-01-18 06:01:53,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:01:53,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:53,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:01:53,264 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:01:53,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 06:01:53,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:01:53,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:01:53,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 06:01:53,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:01:53,762 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 06:01:53,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-01-18 06:01:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:53,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:01:54,213 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 06:01:54,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-01-18 06:01:54,705 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:54,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283872597] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:01:54,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:01:54,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-01-18 06:01:54,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293378926] [2022-01-18 06:01:54,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:01:54,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 06:01:54,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:01:54,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 06:01:54,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1782, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 06:01:54,707 INFO L87 Difference]: Start difference. First operand 13207 states and 36181 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:04,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:02:04,818 INFO L93 Difference]: Finished difference Result 27912 states and 74844 transitions. [2022-01-18 06:02:04,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2022-01-18 06:02:04,819 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 06:02:04,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:02:04,886 INFO L225 Difference]: With dead ends: 27912 [2022-01-18 06:02:04,886 INFO L226 Difference]: Without dead ends: 27500 [2022-01-18 06:02:04,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22323 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=8313, Invalid=50009, Unknown=0, NotChecked=0, Total=58322 [2022-01-18 06:02:04,890 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 1123 mSDsluCounter, 1451 mSDsCounter, 0 mSdLazyCounter, 3131 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1123 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 3582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 3131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:02:04,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1123 Valid, 536 Invalid, 3582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 3131 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 06:02:04,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27500 states. [2022-01-18 06:02:05,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27500 to 13985. [2022-01-18 06:02:05,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13985 states, 13984 states have (on average 2.7281893592677346) internal successors, (38151), 13984 states have internal predecessors, (38151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:05,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13985 states to 13985 states and 38151 transitions. [2022-01-18 06:02:05,230 INFO L78 Accepts]: Start accepts. Automaton has 13985 states and 38151 transitions. Word has length 37 [2022-01-18 06:02:05,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:02:05,231 INFO L470 AbstractCegarLoop]: Abstraction has 13985 states and 38151 transitions. [2022-01-18 06:02:05,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:05,231 INFO L276 IsEmpty]: Start isEmpty. Operand 13985 states and 38151 transitions. [2022-01-18 06:02:05,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 06:02:05,247 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:02:05,247 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:02:05,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 06:02:05,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:05,448 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:02:05,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:02:05,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1519528804, now seen corresponding path program 23 times [2022-01-18 06:02:05,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:02:05,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312973261] [2022-01-18 06:02:05,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:02:05,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:02:05,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:02:05,707 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:05,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:02:05,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312973261] [2022-01-18 06:02:05,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312973261] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:02:05,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169648680] [2022-01-18 06:02:05,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:02:05,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:05,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:02:05,712 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:02:05,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 06:02:05,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 06:02:05,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:02:05,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 06:02:05,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:02:06,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:02:06,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:02:06,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:02:06,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:02:06,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:02:06,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:02:06,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2022-01-18 06:02:06,373 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:06,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:02:06,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:02:06,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:02:06,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:02:06,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:02:06,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:02:06,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:02:06,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:02:06,751 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:02:06,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 38 treesize of output 98 [2022-01-18 06:02:07,214 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:07,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169648680] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:02:07,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:02:07,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-01-18 06:02:07,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208823040] [2022-01-18 06:02:07,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:02:07,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 06:02:07,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:02:07,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 06:02:07,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1785, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 06:02:07,215 INFO L87 Difference]: Start difference. First operand 13985 states and 38151 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:21,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:02:21,504 INFO L93 Difference]: Finished difference Result 32196 states and 85016 transitions. [2022-01-18 06:02:21,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 261 states. [2022-01-18 06:02:21,505 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 06:02:21,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:02:21,571 INFO L225 Difference]: With dead ends: 32196 [2022-01-18 06:02:21,571 INFO L226 Difference]: Without dead ends: 30842 [2022-01-18 06:02:21,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39555 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=13928, Invalid=77578, Unknown=0, NotChecked=0, Total=91506 [2022-01-18 06:02:21,575 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 1177 mSDsluCounter, 3531 mSDsCounter, 0 mSdLazyCounter, 4436 mSolverCounterSat, 625 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1177 SdHoareTripleChecker+Valid, 1987 SdHoareTripleChecker+Invalid, 5681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 625 IncrementalHoareTripleChecker+Valid, 4436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 620 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:02:21,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1177 Valid, 1987 Invalid, 5681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [625 Valid, 4436 Invalid, 0 Unknown, 620 Unchecked, 2.2s Time] [2022-01-18 06:02:21,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30842 states. [2022-01-18 06:02:21,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30842 to 14560. [2022-01-18 06:02:21,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14560 states, 14559 states have (on average 2.7218215536781374) internal successors, (39627), 14559 states have internal predecessors, (39627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:21,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14560 states to 14560 states and 39627 transitions. [2022-01-18 06:02:21,917 INFO L78 Accepts]: Start accepts. Automaton has 14560 states and 39627 transitions. Word has length 37 [2022-01-18 06:02:21,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:02:21,917 INFO L470 AbstractCegarLoop]: Abstraction has 14560 states and 39627 transitions. [2022-01-18 06:02:21,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:21,917 INFO L276 IsEmpty]: Start isEmpty. Operand 14560 states and 39627 transitions. [2022-01-18 06:02:21,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 06:02:21,934 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:02:21,935 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:02:21,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 06:02:22,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:22,135 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:02:22,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:02:22,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1684148304, now seen corresponding path program 24 times [2022-01-18 06:02:22,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:02:22,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487395560] [2022-01-18 06:02:22,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:02:22,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:02:22,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:02:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:02:22,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:02:22,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487395560] [2022-01-18 06:02:22,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487395560] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:02:22,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302354722] [2022-01-18 06:02:22,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:02:22,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:22,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:02:22,315 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:02:22,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 06:02:22,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 06:02:22,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:02:22,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 06:02:22,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:02:22,779 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 06:02:22,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-01-18 06:02:22,840 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:22,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:02:23,212 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 06:02:23,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-01-18 06:02:23,590 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:23,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302354722] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:02:23,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:02:23,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 44 [2022-01-18 06:02:23,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139757166] [2022-01-18 06:02:23,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:02:23,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-18 06:02:23,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:02:23,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-18 06:02:23,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1647, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 06:02:23,592 INFO L87 Difference]: Start difference. First operand 14560 states and 39627 transitions. Second operand has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:36,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:02:36,386 INFO L93 Difference]: Finished difference Result 31171 states and 82882 transitions. [2022-01-18 06:02:36,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 243 states. [2022-01-18 06:02:36,386 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 06:02:36,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:02:36,451 INFO L225 Difference]: With dead ends: 31171 [2022-01-18 06:02:36,451 INFO L226 Difference]: Without dead ends: 30819 [2022-01-18 06:02:36,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32626 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=11529, Invalid=68277, Unknown=0, NotChecked=0, Total=79806 [2022-01-18 06:02:36,458 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 1218 mSDsluCounter, 1756 mSDsCounter, 0 mSdLazyCounter, 3424 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1218 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 4018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 3424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:02:36,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1218 Valid, 754 Invalid, 4018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 3424 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-18 06:02:36,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30819 states. [2022-01-18 06:02:36,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30819 to 15192. [2022-01-18 06:02:36,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15192 states, 15191 states have (on average 2.7192416562438284) internal successors, (41308), 15191 states have internal predecessors, (41308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:36,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15192 states to 15192 states and 41308 transitions. [2022-01-18 06:02:36,876 INFO L78 Accepts]: Start accepts. Automaton has 15192 states and 41308 transitions. Word has length 37 [2022-01-18 06:02:36,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:02:36,877 INFO L470 AbstractCegarLoop]: Abstraction has 15192 states and 41308 transitions. [2022-01-18 06:02:36,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:36,877 INFO L276 IsEmpty]: Start isEmpty. Operand 15192 states and 41308 transitions. [2022-01-18 06:02:36,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 06:02:36,898 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:02:36,898 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:02:36,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-01-18 06:02:37,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 06:02:37,102 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:02:37,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:02:37,103 INFO L85 PathProgramCache]: Analyzing trace with hash -2066976134, now seen corresponding path program 25 times [2022-01-18 06:02:37,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:02:37,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436365674] [2022-01-18 06:02:37,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:02:37,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:02:37,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:02:37,327 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:02:37,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:02:37,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436365674] [2022-01-18 06:02:37,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436365674] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:02:37,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099721192] [2022-01-18 06:02:37,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:02:37,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:37,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:02:37,329 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:02:37,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 06:02:37,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:02:37,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 06:02:37,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:02:37,778 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 06:02:37,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-01-18 06:02:37,833 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:37,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:02:38,217 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 06:02:38,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-01-18 06:02:38,612 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:38,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099721192] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:02:38,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:02:38,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 44 [2022-01-18 06:02:38,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415479359] [2022-01-18 06:02:38,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:02:38,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-18 06:02:38,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:02:38,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-18 06:02:38,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1620, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 06:02:38,614 INFO L87 Difference]: Start difference. First operand 15192 states and 41308 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:53,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:02:53,688 INFO L93 Difference]: Finished difference Result 40939 states and 109794 transitions. [2022-01-18 06:02:53,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 295 states. [2022-01-18 06:02:53,689 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 06:02:53,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:02:53,772 INFO L225 Difference]: With dead ends: 40939 [2022-01-18 06:02:53,772 INFO L226 Difference]: Without dead ends: 39453 [2022-01-18 06:02:53,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 333 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49162 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=16678, Invalid=95212, Unknown=0, NotChecked=0, Total=111890 [2022-01-18 06:02:53,779 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 1246 mSDsluCounter, 3589 mSDsCounter, 0 mSdLazyCounter, 5130 mSolverCounterSat, 633 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1246 SdHoareTripleChecker+Valid, 2049 SdHoareTripleChecker+Invalid, 5763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 633 IncrementalHoareTripleChecker+Valid, 5130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:02:53,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1246 Valid, 2049 Invalid, 5763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [633 Valid, 5130 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-18 06:02:53,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39453 states. [2022-01-18 06:02:54,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39453 to 16120. [2022-01-18 06:02:54,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16120 states, 16119 states have (on average 2.7244866306842854) internal successors, (43916), 16119 states have internal predecessors, (43916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:54,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16120 states to 16120 states and 43916 transitions. [2022-01-18 06:02:54,305 INFO L78 Accepts]: Start accepts. Automaton has 16120 states and 43916 transitions. Word has length 37 [2022-01-18 06:02:54,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:02:54,305 INFO L470 AbstractCegarLoop]: Abstraction has 16120 states and 43916 transitions. [2022-01-18 06:02:54,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:54,305 INFO L276 IsEmpty]: Start isEmpty. Operand 16120 states and 43916 transitions. [2022-01-18 06:02:54,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 06:02:54,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:02:54,332 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:02:54,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 06:02:54,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 06:02:54,555 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:02:54,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:02:54,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1940938686, now seen corresponding path program 26 times [2022-01-18 06:02:54,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:02:54,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640175348] [2022-01-18 06:02:54,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:02:54,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:02:54,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:02:54,773 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:54,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:02:54,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640175348] [2022-01-18 06:02:54,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640175348] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:02:54,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355669065] [2022-01-18 06:02:54,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:02:54,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:54,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:02:54,774 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:02:54,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 06:02:54,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:02:54,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:02:54,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 06:02:54,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:02:55,275 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 06:02:55,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-01-18 06:02:55,336 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:55,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:02:55,712 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 06:02:55,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-01-18 06:02:56,270 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:56,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355669065] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:02:56,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:02:56,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-01-18 06:02:56,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765829670] [2022-01-18 06:02:56,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:02:56,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 06:02:56,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:02:56,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 06:02:56,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1775, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 06:02:56,272 INFO L87 Difference]: Start difference. First operand 16120 states and 43916 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:09,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:03:09,804 INFO L93 Difference]: Finished difference Result 35540 states and 95539 transitions. [2022-01-18 06:03:09,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 260 states. [2022-01-18 06:03:09,804 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 06:03:09,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:03:09,892 INFO L225 Difference]: With dead ends: 35540 [2022-01-18 06:03:09,893 INFO L226 Difference]: Without dead ends: 34093 [2022-01-18 06:03:09,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36899 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=12408, Invalid=78494, Unknown=0, NotChecked=0, Total=90902 [2022-01-18 06:03:09,899 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 1217 mSDsluCounter, 2491 mSDsCounter, 0 mSdLazyCounter, 4786 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1217 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 5268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 4786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:03:09,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1217 Valid, 1248 Invalid, 5268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 4786 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-18 06:03:09,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34093 states. [2022-01-18 06:03:10,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34093 to 17528. [2022-01-18 06:03:10,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17528 states, 17527 states have (on average 2.7226564728704283) internal successors, (47720), 17527 states have internal predecessors, (47720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:10,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17528 states to 17528 states and 47720 transitions. [2022-01-18 06:03:10,478 INFO L78 Accepts]: Start accepts. Automaton has 17528 states and 47720 transitions. Word has length 37 [2022-01-18 06:03:10,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:03:10,479 INFO L470 AbstractCegarLoop]: Abstraction has 17528 states and 47720 transitions. [2022-01-18 06:03:10,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:10,479 INFO L276 IsEmpty]: Start isEmpty. Operand 17528 states and 47720 transitions. [2022-01-18 06:03:10,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 06:03:10,500 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:03:10,500 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:03:10,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 06:03:10,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 06:03:10,705 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:03:10,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:03:10,705 INFO L85 PathProgramCache]: Analyzing trace with hash 949570788, now seen corresponding path program 27 times [2022-01-18 06:03:10,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:03:10,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106900378] [2022-01-18 06:03:10,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:03:10,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:03:10,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:03:10,938 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:10,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:03:10,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106900378] [2022-01-18 06:03:10,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106900378] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:03:10,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982440369] [2022-01-18 06:03:10,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:03:10,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:10,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:03:10,941 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:03:10,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 06:03:10,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 06:03:10,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:03:10,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 06:03:10,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:03:11,461 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 06:03:11,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-01-18 06:03:11,526 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:11,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:03:11,931 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 06:03:11,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 39 treesize of output 103 [2022-01-18 06:03:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:12,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982440369] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:03:12,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:03:12,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-01-18 06:03:12,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237765444] [2022-01-18 06:03:12,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:03:12,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 06:03:12,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:03:12,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 06:03:12,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1793, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 06:03:12,537 INFO L87 Difference]: Start difference. First operand 17528 states and 47720 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:25,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:03:25,829 INFO L93 Difference]: Finished difference Result 36001 states and 97032 transitions. [2022-01-18 06:03:25,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 230 states. [2022-01-18 06:03:25,829 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 06:03:25,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:03:25,921 INFO L225 Difference]: With dead ends: 36001 [2022-01-18 06:03:25,921 INFO L226 Difference]: Without dead ends: 35103 [2022-01-18 06:03:25,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28391 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=11364, Invalid=62348, Unknown=0, NotChecked=0, Total=73712 [2022-01-18 06:03:25,926 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 1001 mSDsluCounter, 1891 mSDsCounter, 0 mSdLazyCounter, 4003 mSolverCounterSat, 507 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 4510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 507 IncrementalHoareTripleChecker+Valid, 4003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:03:25,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1001 Valid, 875 Invalid, 4510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [507 Valid, 4003 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-18 06:03:25,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35103 states. [2022-01-18 06:03:26,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35103 to 18000. [2022-01-18 06:03:26,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18000 states, 17999 states have (on average 2.716039779987777) internal successors, (48886), 17999 states have internal predecessors, (48886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:26,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18000 states to 18000 states and 48886 transitions. [2022-01-18 06:03:26,416 INFO L78 Accepts]: Start accepts. Automaton has 18000 states and 48886 transitions. Word has length 37 [2022-01-18 06:03:26,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:03:26,416 INFO L470 AbstractCegarLoop]: Abstraction has 18000 states and 48886 transitions. [2022-01-18 06:03:26,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:26,417 INFO L276 IsEmpty]: Start isEmpty. Operand 18000 states and 48886 transitions. [2022-01-18 06:03:26,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 06:03:26,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:03:26,441 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:03:26,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-01-18 06:03:26,642 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 [2022-01-18 06:03:26,642 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:03:26,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:03:26,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1131314986, now seen corresponding path program 28 times [2022-01-18 06:03:26,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:03:26,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668851445] [2022-01-18 06:03:26,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:03:26,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:03:26,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:03:26,849 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:03:26,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:03:26,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668851445] [2022-01-18 06:03:26,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668851445] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:03:26,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158824531] [2022-01-18 06:03:26,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:03:26,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:26,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:03:26,850 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:03:26,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 06:03:26,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:03:26,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:03:26,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 06:03:26,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:03:27,323 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 06:03:27,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-01-18 06:03:27,386 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:27,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:03:27,773 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 06:03:27,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-01-18 06:03:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:28,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158824531] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:03:28,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:03:28,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-01-18 06:03:28,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853765826] [2022-01-18 06:03:28,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:03:28,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 06:03:28,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:03:28,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 06:03:28,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1715, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 06:03:28,241 INFO L87 Difference]: Start difference. First operand 18000 states and 48886 transitions. Second operand has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 45 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:47,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:03:47,819 INFO L93 Difference]: Finished difference Result 47599 states and 127744 transitions. [2022-01-18 06:03:47,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 339 states. [2022-01-18 06:03:47,819 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 45 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 06:03:47,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:03:47,918 INFO L225 Difference]: With dead ends: 47599 [2022-01-18 06:03:47,918 INFO L226 Difference]: Without dead ends: 46244 [2022-01-18 06:03:47,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 378 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62634 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=20490, Invalid=123530, Unknown=0, NotChecked=0, Total=144020 [2022-01-18 06:03:47,926 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1306 mSDsluCounter, 2948 mSDsCounter, 0 mSdLazyCounter, 6007 mSolverCounterSat, 616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1306 SdHoareTripleChecker+Valid, 1489 SdHoareTripleChecker+Invalid, 6623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 616 IncrementalHoareTripleChecker+Valid, 6007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:03:47,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1306 Valid, 1489 Invalid, 6623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [616 Valid, 6007 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-18 06:03:47,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46244 states. [2022-01-18 06:03:48,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46244 to 20798. [2022-01-18 06:03:48,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20798 states, 20797 states have (on average 2.712747030821753) internal successors, (56417), 20797 states have internal predecessors, (56417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:48,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20798 states to 20798 states and 56417 transitions. [2022-01-18 06:03:48,531 INFO L78 Accepts]: Start accepts. Automaton has 20798 states and 56417 transitions. Word has length 37 [2022-01-18 06:03:48,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:03:48,531 INFO L470 AbstractCegarLoop]: Abstraction has 20798 states and 56417 transitions. [2022-01-18 06:03:48,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 45 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:48,531 INFO L276 IsEmpty]: Start isEmpty. Operand 20798 states and 56417 transitions. [2022-01-18 06:03:48,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 06:03:48,554 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:03:48,555 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:03:48,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 06:03:48,755 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 [2022-01-18 06:03:48,756 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:03:48,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:03:48,756 INFO L85 PathProgramCache]: Analyzing trace with hash -346656042, now seen corresponding path program 29 times [2022-01-18 06:03:48,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:03:48,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030249126] [2022-01-18 06:03:48,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:03:48,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:03:48,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:03:48,949 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:03:48,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:03:48,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030249126] [2022-01-18 06:03:48,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030249126] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:03:48,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56267081] [2022-01-18 06:03:48,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:03:48,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:48,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:03:48,951 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:03:48,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 06:03:48,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 06:03:48,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:03:48,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 06:03:48,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:03:49,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:03:49,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:03:49,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:03:49,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:03:49,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:03:49,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:03:49,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2022-01-18 06:03:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:49,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:03:49,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:03:49,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:03:49,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:03:49,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:03:49,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:03:49,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:03:49,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:03:49,951 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:03:49,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 38 treesize of output 98 [2022-01-18 06:03:50,375 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:50,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56267081] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:03:50,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:03:50,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-01-18 06:03:50,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066796111] [2022-01-18 06:03:50,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:03:50,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 06:03:50,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:03:50,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 06:03:50,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1717, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 06:03:50,379 INFO L87 Difference]: Start difference. First operand 20798 states and 56417 transitions. Second operand has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:08,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:04:08,112 INFO L93 Difference]: Finished difference Result 54650 states and 147257 transitions. [2022-01-18 06:04:08,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 325 states. [2022-01-18 06:04:08,112 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 06:04:08,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:04:08,240 INFO L225 Difference]: With dead ends: 54650 [2022-01-18 06:04:08,240 INFO L226 Difference]: Without dead ends: 53564 [2022-01-18 06:04:08,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 364 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59804 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=19529, Invalid=114061, Unknown=0, NotChecked=0, Total=133590 [2022-01-18 06:04:08,246 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 1205 mSDsluCounter, 3190 mSDsCounter, 0 mSdLazyCounter, 4671 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 1691 SdHoareTripleChecker+Invalid, 5926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 4671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 666 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:04:08,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1205 Valid, 1691 Invalid, 5926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 4671 Invalid, 0 Unknown, 666 Unchecked, 2.5s Time] [2022-01-18 06:04:08,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53564 states. [2022-01-18 06:04:08,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53564 to 22756. [2022-01-18 06:04:08,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22756 states, 22755 states have (on average 2.711008569545155) internal successors, (61689), 22755 states have internal predecessors, (61689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:08,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22756 states to 22756 states and 61689 transitions. [2022-01-18 06:04:08,902 INFO L78 Accepts]: Start accepts. Automaton has 22756 states and 61689 transitions. Word has length 37 [2022-01-18 06:04:08,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:04:08,902 INFO L470 AbstractCegarLoop]: Abstraction has 22756 states and 61689 transitions. [2022-01-18 06:04:08,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:08,902 INFO L276 IsEmpty]: Start isEmpty. Operand 22756 states and 61689 transitions. [2022-01-18 06:04:08,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-18 06:04:08,931 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:04:08,932 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:04:08,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-18 06:04:09,132 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 [2022-01-18 06:04:09,132 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:04:09,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:04:09,133 INFO L85 PathProgramCache]: Analyzing trace with hash 2073145783, now seen corresponding path program 30 times [2022-01-18 06:04:09,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:04:09,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184337021] [2022-01-18 06:04:09,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:04:09,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:04:09,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:04:09,166 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:09,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:04:09,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184337021] [2022-01-18 06:04:09,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184337021] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:04:09,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820578617] [2022-01-18 06:04:09,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:04:09,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:09,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:04:09,168 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:04:09,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 06:04:09,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 06:04:09,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:04:09,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 06:04:09,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:04:09,270 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:09,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:04:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:09,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820578617] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:04:09,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:04:09,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-01-18 06:04:09,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166673929] [2022-01-18 06:04:09,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:04:09,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 06:04:09,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:04:09,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 06:04:09,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-01-18 06:04:09,340 INFO L87 Difference]: Start difference. First operand 22756 states and 61689 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:09,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:04:09,470 INFO L93 Difference]: Finished difference Result 30249 states and 82841 transitions. [2022-01-18 06:04:09,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 06:04:09,470 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-18 06:04:09,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:04:09,533 INFO L225 Difference]: With dead ends: 30249 [2022-01-18 06:04:09,533 INFO L226 Difference]: Without dead ends: 30177 [2022-01-18 06:04:09,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-01-18 06:04:09,534 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 83 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:04:09,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 110 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:04:09,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30177 states. [2022-01-18 06:04:10,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30177 to 29234. [2022-01-18 06:04:10,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29234 states, 29233 states have (on average 2.7446721171279034) internal successors, (80235), 29233 states have internal predecessors, (80235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:10,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29234 states to 29234 states and 80235 transitions. [2022-01-18 06:04:10,357 INFO L78 Accepts]: Start accepts. Automaton has 29234 states and 80235 transitions. Word has length 40 [2022-01-18 06:04:10,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:04:10,357 INFO L470 AbstractCegarLoop]: Abstraction has 29234 states and 80235 transitions. [2022-01-18 06:04:10,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:10,358 INFO L276 IsEmpty]: Start isEmpty. Operand 29234 states and 80235 transitions. [2022-01-18 06:04:10,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 06:04:10,408 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:04:10,408 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:04:10,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-18 06:04:10,608 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 [2022-01-18 06:04:10,609 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:04:10,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:04:10,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1650713771, now seen corresponding path program 31 times [2022-01-18 06:04:10,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:04:10,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528766320] [2022-01-18 06:04:10,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:04:10,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:04:10,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:04:10,971 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:10,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:04:10,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528766320] [2022-01-18 06:04:10,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528766320] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:04:10,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29190754] [2022-01-18 06:04:10,971 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:04:10,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:10,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:04:10,972 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:04:10,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 06:04:10,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:04:10,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:04:11,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:04:11,817 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-01-18 06:04:11,817 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 50 treesize of output 22 [2022-01-18 06:04:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:11,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:04:12,631 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 06:04:12,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-01-18 06:04:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:14,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29190754] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:04:14,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:04:14,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-01-18 06:04:14,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905027795] [2022-01-18 06:04:14,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:04:14,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-18 06:04:14,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:04:14,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-18 06:04:14,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=2904, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 06:04:14,345 INFO L87 Difference]: Start difference. First operand 29234 states and 80235 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:34,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:04:34,622 INFO L93 Difference]: Finished difference Result 44200 states and 117713 transitions. [2022-01-18 06:04:34,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 339 states. [2022-01-18 06:04:34,623 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 06:04:34,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:04:34,700 INFO L225 Difference]: With dead ends: 44200 [2022-01-18 06:04:34,701 INFO L226 Difference]: Without dead ends: 42253 [2022-01-18 06:04:34,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 391 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64716 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=21746, Invalid=132310, Unknown=0, NotChecked=0, Total=154056 [2022-01-18 06:04:34,706 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 2342 mSDsluCounter, 4675 mSDsCounter, 0 mSdLazyCounter, 8694 mSolverCounterSat, 893 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2342 SdHoareTripleChecker+Valid, 2391 SdHoareTripleChecker+Invalid, 9587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 893 IncrementalHoareTripleChecker+Valid, 8694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:04:34,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2342 Valid, 2391 Invalid, 9587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [893 Valid, 8694 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-01-18 06:04:34,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42253 states. [2022-01-18 06:04:35,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42253 to 30116. [2022-01-18 06:04:35,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30116 states, 30115 states have (on average 2.74394819857214) internal successors, (82634), 30115 states have internal predecessors, (82634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:35,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30116 states to 30116 states and 82634 transitions. [2022-01-18 06:04:35,400 INFO L78 Accepts]: Start accepts. Automaton has 30116 states and 82634 transitions. Word has length 43 [2022-01-18 06:04:35,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:04:35,400 INFO L470 AbstractCegarLoop]: Abstraction has 30116 states and 82634 transitions. [2022-01-18 06:04:35,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:35,401 INFO L276 IsEmpty]: Start isEmpty. Operand 30116 states and 82634 transitions. [2022-01-18 06:04:35,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 06:04:35,442 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:04:35,442 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:04:35,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-18 06:04:35,642 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 [2022-01-18 06:04:35,642 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:04:35,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:04:35,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1112247061, now seen corresponding path program 32 times [2022-01-18 06:04:35,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:04:35,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212630206] [2022-01-18 06:04:35,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:04:35,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:04:35,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:04:36,021 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:36,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:04:36,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212630206] [2022-01-18 06:04:36,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212630206] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:04:36,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429372448] [2022-01-18 06:04:36,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:04:36,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:36,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:04:36,023 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:04:36,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 06:04:36,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:04:36,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:04:36,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:04:36,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:04:36,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:04:36,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:04:36,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:04:36,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:04:36,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:04:36,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:04:36,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:04:36,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:04:36,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:36,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2022-01-18 06:04:36,987 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:36,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:04:37,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:37,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:37,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:37,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:37,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:37,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:37,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:37,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:37,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:37,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:37,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:37,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:37,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:37,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:37,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:37,939 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:04:37,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 49 treesize of output 153 [2022-01-18 06:04:39,026 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:39,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429372448] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:04:39,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:04:39,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-01-18 06:04:39,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111671015] [2022-01-18 06:04:39,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:04:39,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-18 06:04:39,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:04:39,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-18 06:04:39,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=2802, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 06:04:39,027 INFO L87 Difference]: Start difference. First operand 30116 states and 82634 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:53,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:04:53,273 INFO L93 Difference]: Finished difference Result 42109 states and 115194 transitions. [2022-01-18 06:04:53,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 237 states. [2022-01-18 06:04:53,273 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 06:04:53,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:04:53,356 INFO L225 Difference]: With dead ends: 42109 [2022-01-18 06:04:53,357 INFO L226 Difference]: Without dead ends: 42066 [2022-01-18 06:04:53,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 96 SyntacticMatches, 28 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30717 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=9279, Invalid=60153, Unknown=0, NotChecked=0, Total=69432 [2022-01-18 06:04:53,359 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 633 mSDsluCounter, 2958 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 5953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4978 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:04:53,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 1035 Invalid, 5953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 897 Invalid, 0 Unknown, 4978 Unchecked, 0.4s Time] [2022-01-18 06:04:53,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42066 states. [2022-01-18 06:04:53,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42066 to 30630. [2022-01-18 06:04:53,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30630 states, 30629 states have (on average 2.743151914851938) internal successors, (84020), 30629 states have internal predecessors, (84020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:53,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30630 states to 30630 states and 84020 transitions. [2022-01-18 06:04:53,939 INFO L78 Accepts]: Start accepts. Automaton has 30630 states and 84020 transitions. Word has length 43 [2022-01-18 06:04:53,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:04:53,939 INFO L470 AbstractCegarLoop]: Abstraction has 30630 states and 84020 transitions. [2022-01-18 06:04:53,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:53,939 INFO L276 IsEmpty]: Start isEmpty. Operand 30630 states and 84020 transitions. [2022-01-18 06:04:53,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 06:04:53,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:04:53,979 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:04:53,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-01-18 06:04:54,180 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 [2022-01-18 06:04:54,180 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:04:54,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:04:54,180 INFO L85 PathProgramCache]: Analyzing trace with hash -129342371, now seen corresponding path program 33 times [2022-01-18 06:04:54,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:04:54,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438733590] [2022-01-18 06:04:54,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:04:54,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:04:54,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:04:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:54,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:04:54,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438733590] [2022-01-18 06:04:54,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438733590] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:04:54,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801214140] [2022-01-18 06:04:54,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:04:54,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:54,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:04:54,577 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:04:54,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 06:04:54,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 06:04:54,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:04:54,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 06:04:54,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:04:55,345 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-01-18 06:04:55,346 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 50 treesize of output 22 [2022-01-18 06:04:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:55,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:04:56,191 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 06:04:56,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 52 treesize of output 176 [2022-01-18 06:04:58,153 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:58,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801214140] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:04:58,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:04:58,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-01-18 06:04:58,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475053499] [2022-01-18 06:04:58,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:04:58,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-18 06:04:58,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:04:58,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-18 06:04:58,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=2914, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 06:04:58,155 INFO L87 Difference]: Start difference. First operand 30630 states and 84020 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:40,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:05:40,840 INFO L93 Difference]: Finished difference Result 55936 states and 147102 transitions. [2022-01-18 06:05:40,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 596 states. [2022-01-18 06:05:40,841 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 06:05:40,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:05:40,953 INFO L225 Difference]: With dead ends: 55936 [2022-01-18 06:05:40,954 INFO L226 Difference]: Without dead ends: 53473 [2022-01-18 06:05:40,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 648 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189462 ImplicationChecksByTransitivity, 36.4s TimeCoverageRelationStatistics Valid=52090, Invalid=369760, Unknown=0, NotChecked=0, Total=421850 [2022-01-18 06:05:40,969 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 1682 mSDsluCounter, 6005 mSDsCounter, 0 mSdLazyCounter, 12509 mSolverCounterSat, 924 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1682 SdHoareTripleChecker+Valid, 2727 SdHoareTripleChecker+Invalid, 13433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 924 IncrementalHoareTripleChecker+Valid, 12509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:05:40,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1682 Valid, 2727 Invalid, 13433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [924 Valid, 12509 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-01-18 06:05:41,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53473 states. [2022-01-18 06:05:41,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53473 to 30690. [2022-01-18 06:05:41,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30690 states, 30689 states have (on average 2.7449248916549904) internal successors, (84239), 30689 states have internal predecessors, (84239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:41,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30690 states to 30690 states and 84239 transitions. [2022-01-18 06:05:41,647 INFO L78 Accepts]: Start accepts. Automaton has 30690 states and 84239 transitions. Word has length 43 [2022-01-18 06:05:41,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:05:41,647 INFO L470 AbstractCegarLoop]: Abstraction has 30690 states and 84239 transitions. [2022-01-18 06:05:41,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:41,647 INFO L276 IsEmpty]: Start isEmpty. Operand 30690 states and 84239 transitions. [2022-01-18 06:05:41,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 06:05:41,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:05:41,696 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:05:41,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-01-18 06:05:41,896 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 [2022-01-18 06:05:41,896 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:05:41,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:05:41,897 INFO L85 PathProgramCache]: Analyzing trace with hash -2103614959, now seen corresponding path program 34 times [2022-01-18 06:05:41,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:05:41,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966130963] [2022-01-18 06:05:41,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:05:41,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:05:41,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:05:42,275 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:42,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:05:42,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966130963] [2022-01-18 06:05:42,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966130963] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:05:42,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512685531] [2022-01-18 06:05:42,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:05:42,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:05:42,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:05:42,277 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:05:42,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 06:05:42,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:05:42,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:05:42,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:05:42,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:05:43,154 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-01-18 06:05:43,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-01-18 06:05:43,227 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:43,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:05:43,921 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 06:05:43,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-01-18 06:05:45,792 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:45,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512685531] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:05:45,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:05:45,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-01-18 06:05:45,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019550400] [2022-01-18 06:05:45,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:05:45,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-18 06:05:45,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:05:45,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-18 06:05:45,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=2922, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 06:05:45,794 INFO L87 Difference]: Start difference. First operand 30690 states and 84239 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:30,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:06:30,213 INFO L93 Difference]: Finished difference Result 58865 states and 154985 transitions. [2022-01-18 06:06:30,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 628 states. [2022-01-18 06:06:30,213 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 06:06:30,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:06:30,362 INFO L225 Difference]: With dead ends: 58865 [2022-01-18 06:06:30,362 INFO L226 Difference]: Without dead ends: 56451 [2022-01-18 06:06:30,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 680 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210674 ImplicationChecksByTransitivity, 38.3s TimeCoverageRelationStatistics Valid=53546, Invalid=410896, Unknown=0, NotChecked=0, Total=464442 [2022-01-18 06:06:30,380 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 1732 mSDsluCounter, 5833 mSDsCounter, 0 mSdLazyCounter, 11059 mSolverCounterSat, 1021 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1732 SdHoareTripleChecker+Valid, 2854 SdHoareTripleChecker+Invalid, 12080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1021 IncrementalHoareTripleChecker+Valid, 11059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:06:30,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1732 Valid, 2854 Invalid, 12080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1021 Valid, 11059 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-01-18 06:06:30,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56451 states. [2022-01-18 06:06:31,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56451 to 31926. [2022-01-18 06:06:31,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31926 states, 31925 states have (on average 2.74894283476899) internal successors, (87760), 31925 states have internal predecessors, (87760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:31,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31926 states to 31926 states and 87760 transitions. [2022-01-18 06:06:31,231 INFO L78 Accepts]: Start accepts. Automaton has 31926 states and 87760 transitions. Word has length 43 [2022-01-18 06:06:31,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:06:31,231 INFO L470 AbstractCegarLoop]: Abstraction has 31926 states and 87760 transitions. [2022-01-18 06:06:31,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:31,231 INFO L276 IsEmpty]: Start isEmpty. Operand 31926 states and 87760 transitions. [2022-01-18 06:06:31,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 06:06:31,286 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:06:31,286 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:06:31,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-01-18 06:06:31,487 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 [2022-01-18 06:06:31,487 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:06:31,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:06:31,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1987652953, now seen corresponding path program 35 times [2022-01-18 06:06:31,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:06:31,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982035116] [2022-01-18 06:06:31,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:06:31,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:06:31,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:06:32,060 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:32,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:06:32,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982035116] [2022-01-18 06:06:32,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982035116] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:06:32,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718949799] [2022-01-18 06:06:32,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:06:32,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:06:32,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:06:32,065 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:06:32,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 06:06:32,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 06:06:32,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:06:32,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 06:06:32,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:06:33,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:06:33,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:06:33,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:06:33,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:06:33,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:06:33,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:06:33,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:33,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:06:33,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:33,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:06:33,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:06:33,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:06:33,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:06:33,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:33,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:06:33,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:33,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 22 [2022-01-18 06:06:33,240 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:33,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:06:34,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:34,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:34,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:34,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:34,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:34,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:34,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:34,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:34,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:34,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:34,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:34,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:34,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:34,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:34,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:34,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:34,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:34,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:34,135 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:06:34,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 129 [2022-01-18 06:06:34,790 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:34,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718949799] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:06:34,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:06:34,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-01-18 06:06:34,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425108603] [2022-01-18 06:06:34,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:06:34,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-18 06:06:34,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:06:34,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-18 06:06:34,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=2811, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 06:06:34,792 INFO L87 Difference]: Start difference. First operand 31926 states and 87760 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:18,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:07:18,883 INFO L93 Difference]: Finished difference Result 109906 states and 296717 transitions. [2022-01-18 06:07:18,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 575 states. [2022-01-18 06:07:18,884 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 06:07:18,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:07:19,170 INFO L225 Difference]: With dead ends: 109906 [2022-01-18 06:07:19,170 INFO L226 Difference]: Without dead ends: 108076 [2022-01-18 06:07:19,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 149 SyntacticMatches, 54 SemanticMatches, 616 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 194353 ImplicationChecksByTransitivity, 39.6s TimeCoverageRelationStatistics Valid=50892, Invalid=330414, Unknown=0, NotChecked=0, Total=381306 [2022-01-18 06:07:19,183 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 1729 mSDsluCounter, 9182 mSDsCounter, 0 mSdLazyCounter, 6348 mSolverCounterSat, 751 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1729 SdHoareTripleChecker+Valid, 2953 SdHoareTripleChecker+Invalid, 24523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 751 IncrementalHoareTripleChecker+Valid, 6348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17424 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:07:19,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1729 Valid, 2953 Invalid, 24523 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [751 Valid, 6348 Invalid, 0 Unknown, 17424 Unchecked, 3.2s Time] [2022-01-18 06:07:19,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108076 states. [2022-01-18 06:07:20,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108076 to 39267. [2022-01-18 06:07:20,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39267 states, 39266 states have (on average 2.752355727601487) internal successors, (108074), 39266 states have internal predecessors, (108074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:21,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39267 states to 39267 states and 108074 transitions. [2022-01-18 06:07:21,093 INFO L78 Accepts]: Start accepts. Automaton has 39267 states and 108074 transitions. Word has length 43 [2022-01-18 06:07:21,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:07:21,093 INFO L470 AbstractCegarLoop]: Abstraction has 39267 states and 108074 transitions. [2022-01-18 06:07:21,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:21,093 INFO L276 IsEmpty]: Start isEmpty. Operand 39267 states and 108074 transitions. [2022-01-18 06:07:21,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 06:07:21,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:07:21,282 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:07:21,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-18 06:07:21,482 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 [2022-01-18 06:07:21,483 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:07:21,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:07:21,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1298369877, now seen corresponding path program 36 times [2022-01-18 06:07:21,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:07:21,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893491885] [2022-01-18 06:07:21,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:07:21,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:07:21,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:07:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:21,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:07:21,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893491885] [2022-01-18 06:07:21,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893491885] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:07:21,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035091489] [2022-01-18 06:07:21,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:07:21,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:07:21,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:07:21,887 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:07:21,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 06:07:21,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 06:07:21,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:07:21,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:07:21,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:07:22,639 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-01-18 06:07:22,639 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 50 treesize of output 22 [2022-01-18 06:07:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:22,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:07:23,424 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 06:07:23,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-01-18 06:07:25,307 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:25,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035091489] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:07:25,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:07:25,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-01-18 06:07:25,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408458796] [2022-01-18 06:07:25,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:07:25,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-18 06:07:25,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:07:25,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-18 06:07:25,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=2915, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 06:07:25,326 INFO L87 Difference]: Start difference. First operand 39267 states and 108074 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:07,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:08:07,867 INFO L93 Difference]: Finished difference Result 77276 states and 205583 transitions. [2022-01-18 06:08:07,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 609 states. [2022-01-18 06:08:07,868 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 06:08:07,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:08:08,164 INFO L225 Difference]: With dead ends: 77276 [2022-01-18 06:08:08,164 INFO L226 Difference]: Without dead ends: 73306 [2022-01-18 06:08:08,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 661 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204061 ImplicationChecksByTransitivity, 36.3s TimeCoverageRelationStatistics Valid=56273, Invalid=382633, Unknown=0, NotChecked=0, Total=438906 [2022-01-18 06:08:08,176 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 2233 mSDsluCounter, 5723 mSDsCounter, 0 mSdLazyCounter, 11275 mSolverCounterSat, 1093 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2233 SdHoareTripleChecker+Valid, 2675 SdHoareTripleChecker+Invalid, 12368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1093 IncrementalHoareTripleChecker+Valid, 11275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:08:08,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2233 Valid, 2675 Invalid, 12368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1093 Valid, 11275 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-01-18 06:08:08,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73306 states. [2022-01-18 06:08:09,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73306 to 39944. [2022-01-18 06:08:09,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39944 states, 39943 states have (on average 2.7510202037904015) internal successors, (109884), 39943 states have internal predecessors, (109884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:09,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39944 states to 39944 states and 109884 transitions. [2022-01-18 06:08:09,201 INFO L78 Accepts]: Start accepts. Automaton has 39944 states and 109884 transitions. Word has length 43 [2022-01-18 06:08:09,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:08:09,202 INFO L470 AbstractCegarLoop]: Abstraction has 39944 states and 109884 transitions. [2022-01-18 06:08:09,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:09,202 INFO L276 IsEmpty]: Start isEmpty. Operand 39944 states and 109884 transitions. [2022-01-18 06:08:09,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 06:08:09,256 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:08:09,256 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:08:09,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-18 06:08:09,456 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 [2022-01-18 06:08:09,457 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:08:09,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:08:09,457 INFO L85 PathProgramCache]: Analyzing trace with hash -347552145, now seen corresponding path program 37 times [2022-01-18 06:08:09,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:08:09,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871123830] [2022-01-18 06:08:09,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:08:09,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:08:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:08:09,798 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:09,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:08:09,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871123830] [2022-01-18 06:08:09,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871123830] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:08:09,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502479797] [2022-01-18 06:08:09,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:08:09,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:08:09,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:08:09,799 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:08:09,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 06:08:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:08:09,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:08:09,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:08:10,549 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-01-18 06:08:10,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-01-18 06:08:10,619 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:10,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:08:11,298 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 06:08:11,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-01-18 06:08:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:12,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502479797] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:08:12,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:08:12,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-01-18 06:08:12,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841306019] [2022-01-18 06:08:12,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:08:12,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-18 06:08:12,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:08:12,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-18 06:08:12,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=2924, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 06:08:12,637 INFO L87 Difference]: Start difference. First operand 39944 states and 109884 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:01,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:09:01,113 INFO L93 Difference]: Finished difference Result 74377 states and 197725 transitions. [2022-01-18 06:09:01,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 681 states. [2022-01-18 06:09:01,113 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 06:09:01,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:09:01,341 INFO L225 Difference]: With dead ends: 74377 [2022-01-18 06:09:01,342 INFO L226 Difference]: Without dead ends: 71911 [2022-01-18 06:09:01,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 783 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 733 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253069 ImplicationChecksByTransitivity, 41.9s TimeCoverageRelationStatistics Valid=63799, Invalid=475691, Unknown=0, NotChecked=0, Total=539490 [2022-01-18 06:09:01,371 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 2318 mSDsluCounter, 5491 mSDsCounter, 0 mSdLazyCounter, 10838 mSolverCounterSat, 1284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2318 SdHoareTripleChecker+Valid, 2628 SdHoareTripleChecker+Invalid, 12122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1284 IncrementalHoareTripleChecker+Valid, 10838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:09:01,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2318 Valid, 2628 Invalid, 12122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1284 Valid, 10838 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-01-18 06:09:01,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71911 states. [2022-01-18 06:09:02,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71911 to 41601. [2022-01-18 06:09:02,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41601 states, 41600 states have (on average 2.751658653846154) internal successors, (114469), 41600 states have internal predecessors, (114469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:02,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41601 states to 41601 states and 114469 transitions. [2022-01-18 06:09:02,888 INFO L78 Accepts]: Start accepts. Automaton has 41601 states and 114469 transitions. Word has length 43 [2022-01-18 06:09:02,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:09:02,889 INFO L470 AbstractCegarLoop]: Abstraction has 41601 states and 114469 transitions. [2022-01-18 06:09:02,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:02,889 INFO L276 IsEmpty]: Start isEmpty. Operand 41601 states and 114469 transitions. [2022-01-18 06:09:02,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 06:09:02,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:02,958 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:09:02,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-01-18 06:09:03,158 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 [2022-01-18 06:09:03,159 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:09:03,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:03,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1338920043, now seen corresponding path program 38 times [2022-01-18 06:09:03,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:03,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583669506] [2022-01-18 06:09:03,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:03,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:03,575 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:03,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:03,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583669506] [2022-01-18 06:09:03,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583669506] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:09:03,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876240964] [2022-01-18 06:09:03,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:09:03,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:03,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:09:03,577 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:09:03,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 06:09:03,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:09:03,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:09:03,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:09:03,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:09:04,553 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-01-18 06:09:04,553 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 50 treesize of output 22 [2022-01-18 06:09:04,627 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:04,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:09:05,447 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 06:09:05,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-01-18 06:09:07,508 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:07,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876240964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:09:07,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:09:07,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-01-18 06:09:07,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488340040] [2022-01-18 06:09:07,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:09:07,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-18 06:09:07,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:07,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-18 06:09:07,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=2931, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 06:09:07,510 INFO L87 Difference]: Start difference. First operand 41601 states and 114469 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-01-18 06:09:08,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 06:09:08,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=560, Invalid=4132, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 06:09:08,254 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 73 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:09:08,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 37 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1014 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:09:08,256 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-18 06:09:08,281 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 06:09:08,283 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 06:09:08,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-18 06:09:08,471 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 [2022-01-18 06:09:08,472 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (41601states) and FLOYD_HOARE automaton (currently 15 states, 58 states before enhancement),while ReachableStatesComputation was computing reachable states (62 states constructed, input type IntersectNwa). [2022-01-18 06:09:08,474 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-18 06:09:08,474 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-18 06:09:08,474 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-18 06:09:08,476 INFO L732 BasicCegarLoop]: Path program histogram: [38, 2, 1] [2022-01-18 06:09:08,477 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 06:09:08,477 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 06:09:08,479 INFO L202 PluginConnector]: Adding new model prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 06:09:08 BasicIcfg [2022-01-18 06:09:08,479 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 06:09:08,480 INFO L158 Benchmark]: Toolchain (without parser) took 719981.18ms. Allocated memory was 444.6MB in the beginning and 2.8GB in the end (delta: 2.3GB). Free memory was 406.6MB in the beginning and 1.6GB in the end (delta: -1.2GB). Peak memory consumption was 1.1GB. Max. memory is 16.0GB. [2022-01-18 06:09:08,480 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 444.6MB. Free memory is still 407.7MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 06:09:08,480 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.35ms. Allocated memory is still 444.6MB. Free memory was 406.6MB in the beginning and 405.0MB in the end (delta: 1.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2022-01-18 06:09:08,480 INFO L158 Benchmark]: Boogie Preprocessor took 12.02ms. Allocated memory is still 444.6MB. Free memory was 405.0MB in the beginning and 404.1MB in the end (delta: 908.2kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 06:09:08,480 INFO L158 Benchmark]: RCFGBuilder took 214.96ms. Allocated memory is still 444.6MB. Free memory was 404.1MB in the beginning and 394.7MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2022-01-18 06:09:08,480 INFO L158 Benchmark]: TraceAbstraction took 719730.46ms. Allocated memory was 444.6MB in the beginning and 2.8GB in the end (delta: 2.3GB). Free memory was 394.2MB in the beginning and 1.6GB in the end (delta: -1.2GB). Peak memory consumption was 1.1GB. Max. memory is 16.0GB. [2022-01-18 06:09:08,480 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 444.6MB. Free memory is still 407.7MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 20.35ms. Allocated memory is still 444.6MB. Free memory was 406.6MB in the beginning and 405.0MB in the end (delta: 1.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 12.02ms. Allocated memory is still 444.6MB. Free memory was 405.0MB in the beginning and 404.1MB in the end (delta: 908.2kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 214.96ms. Allocated memory is still 444.6MB. Free memory was 404.1MB in the beginning and 394.7MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 719730.46ms. Allocated memory was 444.6MB in the beginning and 2.8GB in the end (delta: 2.3GB). Free memory was 394.2MB in the beginning and 1.6GB in the end (delta: -1.2GB). Peak memory consumption was 1.1GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (41601states) and FLOYD_HOARE automaton (currently 15 states, 58 states before enhancement),while ReachableStatesComputation was computing reachable states (62 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (41601states) and FLOYD_HOARE automaton (currently 15 states, 58 states before enhancement),while ReachableStatesComputation was computing reachable states (62 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (41601states) and FLOYD_HOARE automaton (currently 15 states, 58 states before enhancement),while ReachableStatesComputation was computing reachable states (62 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (41601states) and FLOYD_HOARE automaton (currently 15 states, 58 states before enhancement),while ReachableStatesComputation was computing reachable states (62 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 45 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 719.7s, OverallIterations: 41, TraceHistogramMax: 4, PathProgramHistogramMax: 38, EmptinessCheckTime: 0.9s, AutomataDifference: 624.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 45518 SdHoareTripleChecker+Valid, 86.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 45518 mSDsluCounter, 52192 SdHoareTripleChecker+Invalid, 73.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 25744 IncrementalHoareTripleChecker+Unchecked, 107815 mSDsCounter, 21842 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 177329 IncrementalHoareTripleChecker+Invalid, 224915 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21842 mSolverCounterUnsat, 2603 mSDtfsCounter, 177329 mSolverCounterSat, 0.7s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 14299 GetRequests, 2028 SyntacticMatches, 115 SemanticMatches, 12156 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2366073 ImplicationChecksByTransitivity, 535.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41601occurred in iteration=40, InterpolantAutomatonStates: 10818, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 15.0s AutomataMinimizationTime, 40 MinimizatonAttempts, 522962 StatesRemovedByMinimization, 37 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 69.5s InterpolantComputationTime, 2854 NumberOfCodeBlocks, 2854 NumberOfCodeBlocksAsserted, 144 NumberOfCheckSat, 4134 ConstructedInterpolants, 101 QuantifiedInterpolants, 57028 SizeOfPredicates, 461 NumberOfNonLiveVariables, 3396 ConjunctsInSsa, 933 ConjunctsInUnsatCore, 117 InterpolantComputations, 3 PerfectInterpolantSequences, 275/2854 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