/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/queue-add-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 05:59:16,028 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 05:59:16,030 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 05:59:16,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-18 05:59:16,082 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-18 05:59:16,083 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-18 05:59:16,084 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-18 05:59:16,085 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-18 05:59:16,086 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-18 05:59:16,087 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-18 05:59:16,087 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-18 05:59:16,088 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-01-18 05:59:16,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 05:59:16,120 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 05:59:16,120 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 05:59:16,121 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 05:59:16,143 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 05:59:16,144 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 05:59:16,144 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 05:59:16,144 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 05:59:16,145 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 05:59:16,145 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 05:59:16,145 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 05:59:16,145 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 05:59:16,146 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 05:59:16,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 05:59:16,146 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 05:59:16,146 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 05:59:16,146 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 05:59:16,146 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 05:59:16,147 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 05:59:16,147 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 05:59:16,147 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 05:59:16,147 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 05:59:16,147 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 05:59:16,147 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 05:59:16,147 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 05:59:16,147 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 05:59:16,147 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 05:59:16,147 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 05:59:16,148 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 05:59:16,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 05:59:16,149 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 05:59:16,149 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 05:59:16,149 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 05:59:16,149 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 05:59:16,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 05:59:16,149 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 05:59:16,149 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 05:59:16,149 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 05:59:16,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 05:59:16,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 05:59:16,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 05:59:16,349 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 05:59:16,350 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 05:59:16,350 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl [2022-01-18 05:59:16,351 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl' [2022-01-18 05:59:16,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 05:59:16,372 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 05:59:16,373 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 05:59:16,373 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 05:59:16,373 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 05:59:16,381 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:59:16" (1/1) ... [2022-01-18 05:59:16,386 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:59:16" (1/1) ... [2022-01-18 05:59:16,390 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 05:59:16,391 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 05:59:16,392 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 05:59:16,392 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 05:59:16,392 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 05:59:16,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:59:16" (1/1) ... [2022-01-18 05:59:16,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:59:16" (1/1) ... [2022-01-18 05:59:16,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:59:16" (1/1) ... [2022-01-18 05:59:16,399 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:59:16" (1/1) ... [2022-01-18 05:59:16,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:59:16" (1/1) ... [2022-01-18 05:59:16,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:59:16" (1/1) ... [2022-01-18 05:59:16,404 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:59:16" (1/1) ... [2022-01-18 05:59:16,405 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 05:59:16,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 05:59:16,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 05:59:16,407 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 05:59:16,408 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:59:16" (1/1) ... [2022-01-18 05:59:16,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 05:59:16,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:16,430 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 05:59:16,448 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 05:59:16,467 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 05:59:16,467 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 05:59:16,467 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 05:59:16,467 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 05:59:16,467 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 05:59:16,467 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 05:59:16,467 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 05:59:16,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 05:59:16,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 05:59:16,468 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 05:59:16,501 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 05:59:16,502 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 05:59:16,623 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 05:59:16,638 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 05:59:16,638 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 05:59:16,640 INFO L202 PluginConnector]: Adding new model queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:59:16 BoogieIcfgContainer [2022-01-18 05:59:16,640 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 05:59:16,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 05:59:16,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 05:59:16,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 05:59:16,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:59:16" (1/2) ... [2022-01-18 05:59:16,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20afbfce and model type queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 05:59:16, skipping insertion in model container [2022-01-18 05:59:16,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:59:16" (2/2) ... [2022-01-18 05:59:16,652 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-2.wvr.bpl [2022-01-18 05:59:16,656 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 05:59:16,656 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 05:59:16,656 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 05:59:16,656 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 05:59:16,698 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-18 05:59:16,735 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 05:59:16,741 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 05:59:16,741 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-18 05:59:16,750 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 26 transitions, 68 flow [2022-01-18 05:59:16,781 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 76 states, 75 states have (on average 1.96) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:16,783 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 75 states have (on average 1.96) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:16,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 05:59:16,789 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:16,790 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:16,790 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:16,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:16,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1960784707, now seen corresponding path program 1 times [2022-01-18 05:59:16,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:16,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345036480] [2022-01-18 05:59:16,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:16,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:16,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:16,929 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 05:59:16,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:16,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345036480] [2022-01-18 05:59:16,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345036480] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:59:16,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:59:16,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 05:59:16,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403384507] [2022-01-18 05:59:16,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:59:16,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 05:59:16,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:16,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 05:59:16,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 05:59:16,968 INFO L87 Difference]: Start difference. First operand has 76 states, 75 states have (on average 1.96) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 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 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:17,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:17,015 INFO L93 Difference]: Finished difference Result 84 states and 163 transitions. [2022-01-18 05:59:17,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 05:59:17,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 05:59:17,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:17,022 INFO L225 Difference]: With dead ends: 84 [2022-01-18 05:59:17,022 INFO L226 Difference]: Without dead ends: 84 [2022-01-18 05:59:17,023 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 05:59:17,026 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:17,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:59:17,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-18 05:59:17,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-01-18 05:59:17,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.963855421686747) internal successors, (163), 83 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:17,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 163 transitions. [2022-01-18 05:59:17,078 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 163 transitions. Word has length 15 [2022-01-18 05:59:17,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:17,078 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 163 transitions. [2022-01-18 05:59:17,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:17,079 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 163 transitions. [2022-01-18 05:59:17,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 05:59:17,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:17,080 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 05:59:17,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 05:59:17,080 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:17,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:17,081 INFO L85 PathProgramCache]: Analyzing trace with hash 273858138, now seen corresponding path program 1 times [2022-01-18 05:59:17,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:17,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599196324] [2022-01-18 05:59:17,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:17,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:17,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:17,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:17,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:17,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599196324] [2022-01-18 05:59:17,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599196324] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:17,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92679041] [2022-01-18 05:59:17,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:17,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:17,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:17,267 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 05:59:17,268 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 05:59:17,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:17,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 05:59:17,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:17,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:17,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:17,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92679041] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:17,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:17,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-01-18 05:59:17,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355176541] [2022-01-18 05:59:17,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:17,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 05:59:17,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:17,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 05:59:17,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-01-18 05:59:17,713 INFO L87 Difference]: Start difference. First operand 84 states and 163 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:18,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:18,111 INFO L93 Difference]: Finished difference Result 197 states and 375 transitions. [2022-01-18 05:59:18,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:59:18,112 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 05:59:18,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:18,117 INFO L225 Difference]: With dead ends: 197 [2022-01-18 05:59:18,118 INFO L226 Difference]: Without dead ends: 188 [2022-01-18 05:59:18,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:59:18,122 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 105 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:18,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 139 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:59:18,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-18 05:59:18,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 113. [2022-01-18 05:59:18,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.9285714285714286) internal successors, (216), 112 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:18,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 216 transitions. [2022-01-18 05:59:18,137 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 216 transitions. Word has length 19 [2022-01-18 05:59:18,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:18,141 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 216 transitions. [2022-01-18 05:59:18,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:18,142 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 216 transitions. [2022-01-18 05:59:18,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 05:59:18,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:18,143 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 05:59:18,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-18 05:59:18,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:18,348 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:18,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:18,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1123313272, now seen corresponding path program 2 times [2022-01-18 05:59:18,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:18,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518490449] [2022-01-18 05:59:18,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:18,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:18,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:18,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518490449] [2022-01-18 05:59:18,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518490449] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:18,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210138378] [2022-01-18 05:59:18,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:59:18,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:18,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:18,453 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 05:59:18,456 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 05:59:18,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:59:18,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:18,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 05:59:18,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:18,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:18,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:18,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:18,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210138378] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:18,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:18,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 05:59:18,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502313217] [2022-01-18 05:59:18,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:18,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:59:18,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:18,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:59:18,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:59:18,782 INFO L87 Difference]: Start difference. First operand 113 states and 216 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:19,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:19,182 INFO L93 Difference]: Finished difference Result 257 states and 493 transitions. [2022-01-18 05:59:19,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 05:59:19,182 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 05:59:19,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:19,184 INFO L225 Difference]: With dead ends: 257 [2022-01-18 05:59:19,184 INFO L226 Difference]: Without dead ends: 248 [2022-01-18 05:59:19,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=232, Invalid=580, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:59:19,185 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 166 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:19,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 110 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:59:19,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-18 05:59:19,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 117. [2022-01-18 05:59:19,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.9655172413793103) internal successors, (228), 116 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:19,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 228 transitions. [2022-01-18 05:59:19,192 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 228 transitions. Word has length 19 [2022-01-18 05:59:19,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:19,192 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 228 transitions. [2022-01-18 05:59:19,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:19,192 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 228 transitions. [2022-01-18 05:59:19,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 05:59:19,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:19,193 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:19,225 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 05:59:19,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-18 05:59:19,403 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:19,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:19,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1992490104, now seen corresponding path program 3 times [2022-01-18 05:59:19,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:19,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391890400] [2022-01-18 05:59:19,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:19,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:19,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:19,419 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 05:59:19,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:19,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391890400] [2022-01-18 05:59:19,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391890400] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:59:19,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:59:19,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 05:59:19,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108291728] [2022-01-18 05:59:19,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:59:19,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 05:59:19,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:19,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 05:59:19,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 05:59:19,421 INFO L87 Difference]: Start difference. First operand 117 states and 228 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:19,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:19,428 INFO L93 Difference]: Finished difference Result 120 states and 230 transitions. [2022-01-18 05:59:19,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 05:59:19,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 05:59:19,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:19,429 INFO L225 Difference]: With dead ends: 120 [2022-01-18 05:59:19,429 INFO L226 Difference]: Without dead ends: 120 [2022-01-18 05:59:19,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 05:59:19,429 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:19,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 28 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:59:19,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-01-18 05:59:19,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-01-18 05:59:19,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.9327731092436975) internal successors, (230), 119 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:19,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 230 transitions. [2022-01-18 05:59:19,434 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 230 transitions. Word has length 19 [2022-01-18 05:59:19,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:19,434 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 230 transitions. [2022-01-18 05:59:19,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:19,434 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 230 transitions. [2022-01-18 05:59:19,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 05:59:19,435 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:19,435 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 05:59:19,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 05:59:19,435 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:19,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:19,436 INFO L85 PathProgramCache]: Analyzing trace with hash -928935378, now seen corresponding path program 4 times [2022-01-18 05:59:19,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:19,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316033113] [2022-01-18 05:59:19,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:19,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:19,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:19,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316033113] [2022-01-18 05:59:19,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316033113] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:19,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585623987] [2022-01-18 05:59:19,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:59:19,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:19,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:19,504 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 05:59:19,505 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 05:59:19,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:59:19,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:19,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 05:59:19,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:19,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:19,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:19,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585623987] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:19,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:19,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-01-18 05:59:19,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943270322] [2022-01-18 05:59:19,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:19,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:59:19,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:19,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:59:19,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:59:19,753 INFO L87 Difference]: Start difference. First operand 120 states and 230 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:20,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:20,080 INFO L93 Difference]: Finished difference Result 198 states and 372 transitions. [2022-01-18 05:59:20,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:59:20,080 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 05:59:20,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:20,081 INFO L225 Difference]: With dead ends: 198 [2022-01-18 05:59:20,081 INFO L226 Difference]: Without dead ends: 191 [2022-01-18 05:59:20,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:59:20,082 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 122 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:20,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 126 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:59:20,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-18 05:59:20,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 114. [2022-01-18 05:59:20,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.920353982300885) internal successors, (217), 113 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:20,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 217 transitions. [2022-01-18 05:59:20,087 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 217 transitions. Word has length 19 [2022-01-18 05:59:20,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:20,088 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 217 transitions. [2022-01-18 05:59:20,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:20,088 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 217 transitions. [2022-01-18 05:59:20,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:59:20,088 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:20,089 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:20,109 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 05:59:20,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:20,289 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:20,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:20,290 INFO L85 PathProgramCache]: Analyzing trace with hash -171096099, now seen corresponding path program 1 times [2022-01-18 05:59:20,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:20,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785002207] [2022-01-18 05:59:20,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:20,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:20,329 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 05:59:20,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:20,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785002207] [2022-01-18 05:59:20,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785002207] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:20,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515175625] [2022-01-18 05:59:20,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:20,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:20,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:20,336 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 05:59:20,337 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 05:59:20,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:20,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 05:59:20,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:20,402 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 05:59:20,413 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 05:59:20,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:20,447 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:59:20,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-01-18 05:59:20,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:20,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515175625] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:20,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:20,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 05:59:20,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814682045] [2022-01-18 05:59:20,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:20,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 05:59:20,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:20,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 05:59:20,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 05:59:20,460 INFO L87 Difference]: Start difference. First operand 114 states and 217 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 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 05:59:20,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:20,507 INFO L93 Difference]: Finished difference Result 152 states and 292 transitions. [2022-01-18 05:59:20,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:59:20,507 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:59:20,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:20,508 INFO L225 Difference]: With dead ends: 152 [2022-01-18 05:59:20,508 INFO L226 Difference]: Without dead ends: 152 [2022-01-18 05:59:20,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-18 05:59:20,510 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 49 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:20,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 124 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:59:20,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-18 05:59:20,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 122. [2022-01-18 05:59:20,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.9834710743801653) internal successors, (240), 121 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:20,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 240 transitions. [2022-01-18 05:59:20,519 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 240 transitions. Word has length 22 [2022-01-18 05:59:20,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:20,519 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 240 transitions. [2022-01-18 05:59:20,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 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 05:59:20,519 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 240 transitions. [2022-01-18 05:59:20,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:59:20,521 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:20,521 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:20,547 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 05:59:20,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:20,727 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:20,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:20,728 INFO L85 PathProgramCache]: Analyzing trace with hash -506947209, now seen corresponding path program 5 times [2022-01-18 05:59:20,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:20,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072058960] [2022-01-18 05:59:20,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:20,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:20,750 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 05:59:20,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:20,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072058960] [2022-01-18 05:59:20,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072058960] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:20,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042766391] [2022-01-18 05:59:20,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:59:20,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:20,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:20,752 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 05:59:20,753 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 05:59:20,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:59:20,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:20,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 05:59:20,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:20,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:20,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-18 05:59:20,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042766391] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:59:20,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-18 05:59:20,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-01-18 05:59:20,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076863714] [2022-01-18 05:59:20,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:59:20,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 05:59:20,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:20,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 05:59:20,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 05:59:20,813 INFO L87 Difference]: Start difference. First operand 122 states and 240 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:20,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:20,825 INFO L93 Difference]: Finished difference Result 288 states and 559 transitions. [2022-01-18 05:59:20,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 05:59:20,825 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:59:20,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:20,826 INFO L225 Difference]: With dead ends: 288 [2022-01-18 05:59:20,826 INFO L226 Difference]: Without dead ends: 257 [2022-01-18 05:59:20,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 05:59:20,826 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 34 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:20,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 47 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:59:20,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-01-18 05:59:20,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 223. [2022-01-18 05:59:20,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.045045045045045) internal successors, (454), 222 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:20,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 454 transitions. [2022-01-18 05:59:20,845 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 454 transitions. Word has length 23 [2022-01-18 05:59:20,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:20,846 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 454 transitions. [2022-01-18 05:59:20,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:20,846 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 454 transitions. [2022-01-18 05:59:20,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 05:59:20,846 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:20,846 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:20,863 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 05:59:21,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:21,047 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:21,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:21,048 INFO L85 PathProgramCache]: Analyzing trace with hash 202156410, now seen corresponding path program 2 times [2022-01-18 05:59:21,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:21,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617272986] [2022-01-18 05:59:21,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:21,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:21,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:21,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617272986] [2022-01-18 05:59:21,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617272986] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:21,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060517539] [2022-01-18 05:59:21,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:59:21,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:21,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:21,199 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 05:59:21,200 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 05:59:21,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:59:21,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:21,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 05:59:21,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:21,336 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 05:59:21,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:21,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:21,656 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:59:21,656 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 18 treesize of output 20 [2022-01-18 05:59:21,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:21,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060517539] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:21,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:21,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 25 [2022-01-18 05:59:21,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851556546] [2022-01-18 05:59:21,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:21,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 05:59:21,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:21,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 05:59:21,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:59:21,723 INFO L87 Difference]: Start difference. First operand 223 states and 454 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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 05:59:22,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:22,324 INFO L93 Difference]: Finished difference Result 390 states and 757 transitions. [2022-01-18 05:59:22,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 05:59:22,325 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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 26 [2022-01-18 05:59:22,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:22,326 INFO L225 Difference]: With dead ends: 390 [2022-01-18 05:59:22,326 INFO L226 Difference]: Without dead ends: 358 [2022-01-18 05:59:22,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=237, Invalid=1569, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 05:59:22,327 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 184 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:22,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 281 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:59:22,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-01-18 05:59:22,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 246. [2022-01-18 05:59:22,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.0081632653061225) internal successors, (492), 245 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:22,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 492 transitions. [2022-01-18 05:59:22,334 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 492 transitions. Word has length 26 [2022-01-18 05:59:22,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:22,334 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 492 transitions. [2022-01-18 05:59:22,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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 05:59:22,334 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 492 transitions. [2022-01-18 05:59:22,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 05:59:22,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:22,335 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:22,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-18 05:59:22,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:22,551 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:22,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:22,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1479948104, now seen corresponding path program 3 times [2022-01-18 05:59:22,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:22,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514918892] [2022-01-18 05:59:22,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:22,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:22,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:22,728 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:22,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:22,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514918892] [2022-01-18 05:59:22,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514918892] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:22,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635222144] [2022-01-18 05:59:22,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:59:22,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:22,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:22,730 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 05:59:22,730 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 05:59:22,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:59:22,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:22,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 05:59:22,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:22,899 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 05:59:23,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:23,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:23,236 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:59:23,236 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 18 treesize of output 20 [2022-01-18 05:59:23,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:23,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635222144] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:23,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:23,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-01-18 05:59:23,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220042994] [2022-01-18 05:59:23,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:23,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:59:23,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:23,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:59:23,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:59:23,300 INFO L87 Difference]: Start difference. First operand 246 states and 492 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:24,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:24,346 INFO L93 Difference]: Finished difference Result 464 states and 901 transitions. [2022-01-18 05:59:24,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 05:59:24,346 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 05:59:24,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:24,348 INFO L225 Difference]: With dead ends: 464 [2022-01-18 05:59:24,348 INFO L226 Difference]: Without dead ends: 432 [2022-01-18 05:59:24,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=415, Invalid=2777, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 05:59:24,349 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 215 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:24,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 338 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:59:24,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-01-18 05:59:24,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 252. [2022-01-18 05:59:24,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.0199203187250996) internal successors, (507), 251 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:24,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 507 transitions. [2022-01-18 05:59:24,356 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 507 transitions. Word has length 26 [2022-01-18 05:59:24,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:24,357 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 507 transitions. [2022-01-18 05:59:24,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:24,357 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 507 transitions. [2022-01-18 05:59:24,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 05:59:24,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:24,357 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:24,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 05:59:24,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:24,575 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:24,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:24,576 INFO L85 PathProgramCache]: Analyzing trace with hash 828023674, now seen corresponding path program 4 times [2022-01-18 05:59:24,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:24,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804933845] [2022-01-18 05:59:24,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:24,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:24,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:24,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:24,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:24,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804933845] [2022-01-18 05:59:24,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804933845] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:24,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878955407] [2022-01-18 05:59:24,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:59:24,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:24,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:24,734 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 05:59:24,735 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 05:59:24,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:59:24,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:24,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 05:59:24,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:24,859 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 05:59:25,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:25,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:25,263 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:59:25,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-01-18 05:59:25,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:25,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878955407] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:25,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:25,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-01-18 05:59:25,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479493417] [2022-01-18 05:59:25,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:25,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:59:25,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:25,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:59:25,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:59:25,355 INFO L87 Difference]: Start difference. First operand 252 states and 507 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:26,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:26,523 INFO L93 Difference]: Finished difference Result 495 states and 962 transitions. [2022-01-18 05:59:26,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 05:59:26,523 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 05:59:26,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:26,525 INFO L225 Difference]: With dead ends: 495 [2022-01-18 05:59:26,525 INFO L226 Difference]: Without dead ends: 463 [2022-01-18 05:59:26,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=481, Invalid=3301, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 05:59:26,526 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 235 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:26,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 384 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:59:26,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-01-18 05:59:26,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 253. [2022-01-18 05:59:26,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.0198412698412698) internal successors, (509), 252 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:26,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 509 transitions. [2022-01-18 05:59:26,532 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 509 transitions. Word has length 26 [2022-01-18 05:59:26,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:26,532 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 509 transitions. [2022-01-18 05:59:26,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:26,532 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 509 transitions. [2022-01-18 05:59:26,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 05:59:26,533 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:26,533 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:26,550 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 05:59:26,750 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,SelfDestructingSolverStorable9 [2022-01-18 05:59:26,751 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:26,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:26,752 INFO L85 PathProgramCache]: Analyzing trace with hash -2040701256, now seen corresponding path program 5 times [2022-01-18 05:59:26,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:26,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175001276] [2022-01-18 05:59:26,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:26,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:26,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:26,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:26,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175001276] [2022-01-18 05:59:26,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175001276] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:26,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125634518] [2022-01-18 05:59:26,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:59:26,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:26,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:26,932 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 05:59:26,933 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 05:59:26,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:59:26,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:26,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:59:26,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:27,055 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 05:59:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:27,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:27,426 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:59:27,427 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 18 treesize of output 20 [2022-01-18 05:59:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:27,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125634518] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:27,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:27,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-01-18 05:59:27,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606360834] [2022-01-18 05:59:27,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:27,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:59:27,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:27,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:59:27,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:59:27,504 INFO L87 Difference]: Start difference. First operand 253 states and 509 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:28,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:28,806 INFO L93 Difference]: Finished difference Result 474 states and 919 transitions. [2022-01-18 05:59:28,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 05:59:28,806 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 05:59:28,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:28,808 INFO L225 Difference]: With dead ends: 474 [2022-01-18 05:59:28,808 INFO L226 Difference]: Without dead ends: 442 [2022-01-18 05:59:28,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1217 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=576, Invalid=3714, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 05:59:28,809 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 268 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:28,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 328 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1125 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:59:28,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-01-18 05:59:28,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 257. [2022-01-18 05:59:28,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.015625) internal successors, (516), 256 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:28,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 516 transitions. [2022-01-18 05:59:28,816 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 516 transitions. Word has length 26 [2022-01-18 05:59:28,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:28,817 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 516 transitions. [2022-01-18 05:59:28,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:28,817 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 516 transitions. [2022-01-18 05:59:28,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 05:59:28,819 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:28,819 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:28,835 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 05:59:29,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:29,035 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:29,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:29,035 INFO L85 PathProgramCache]: Analyzing trace with hash 2105111822, now seen corresponding path program 6 times [2022-01-18 05:59:29,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:29,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071900319] [2022-01-18 05:59:29,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:29,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:29,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:29,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:29,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071900319] [2022-01-18 05:59:29,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071900319] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:29,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538029911] [2022-01-18 05:59:29,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:59:29,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:29,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:29,207 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 05:59:29,207 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 05:59:29,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:59:29,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:29,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 05:59:29,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:29,321 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 15 treesize of output 7 [2022-01-18 05:59:29,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:29,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:29,711 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:59:29,711 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 18 treesize of output 20 [2022-01-18 05:59:29,773 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:29,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538029911] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:29,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:29,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-01-18 05:59:29,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588450842] [2022-01-18 05:59:29,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:29,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:59:29,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:29,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:59:29,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:59:29,774 INFO L87 Difference]: Start difference. First operand 257 states and 516 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:30,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:30,432 INFO L93 Difference]: Finished difference Result 446 states and 881 transitions. [2022-01-18 05:59:30,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 05:59:30,433 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 05:59:30,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:30,435 INFO L225 Difference]: With dead ends: 446 [2022-01-18 05:59:30,435 INFO L226 Difference]: Without dead ends: 418 [2022-01-18 05:59:30,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=304, Invalid=1858, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 05:59:30,436 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 127 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:30,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 293 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:59:30,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-01-18 05:59:30,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 260. [2022-01-18 05:59:30,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.011583011583012) internal successors, (521), 259 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:30,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 521 transitions. [2022-01-18 05:59:30,444 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 521 transitions. Word has length 26 [2022-01-18 05:59:30,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:30,444 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 521 transitions. [2022-01-18 05:59:30,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:30,444 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 521 transitions. [2022-01-18 05:59:30,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 05:59:30,445 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:30,445 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:30,467 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 05:59:30,659 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,SelfDestructingSolverStorable11 [2022-01-18 05:59:30,659 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:30,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:30,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1872047740, now seen corresponding path program 7 times [2022-01-18 05:59:30,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:30,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898987805] [2022-01-18 05:59:30,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:30,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:30,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:30,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:30,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:30,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898987805] [2022-01-18 05:59:30,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898987805] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:30,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37749755] [2022-01-18 05:59:30,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:59:30,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:30,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:30,819 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 05:59:30,820 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 05:59:30,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:30,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 05:59:30,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:31,039 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 15 treesize of output 7 [2022-01-18 05:59:31,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:31,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:31,311 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:59:31,311 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 22 treesize of output 24 [2022-01-18 05:59:31,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:31,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37749755] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:31,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:31,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-01-18 05:59:31,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156866375] [2022-01-18 05:59:31,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:31,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:59:31,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:31,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:59:31,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:59:31,386 INFO L87 Difference]: Start difference. First operand 260 states and 521 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:32,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:32,109 INFO L93 Difference]: Finished difference Result 485 states and 950 transitions. [2022-01-18 05:59:32,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 05:59:32,109 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 05:59:32,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:32,111 INFO L225 Difference]: With dead ends: 485 [2022-01-18 05:59:32,111 INFO L226 Difference]: Without dead ends: 453 [2022-01-18 05:59:32,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=1811, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 05:59:32,112 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 123 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:32,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 390 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:59:32,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-01-18 05:59:32,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 269. [2022-01-18 05:59:32,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.0186567164179103) internal successors, (541), 268 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:32,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 541 transitions. [2022-01-18 05:59:32,118 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 541 transitions. Word has length 26 [2022-01-18 05:59:32,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:32,119 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 541 transitions. [2022-01-18 05:59:32,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:32,119 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 541 transitions. [2022-01-18 05:59:32,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 05:59:32,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:32,119 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:32,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-01-18 05:59:32,334 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,SelfDestructingSolverStorable12 [2022-01-18 05:59:32,334 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:32,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:32,335 INFO L85 PathProgramCache]: Analyzing trace with hash -114947778, now seen corresponding path program 8 times [2022-01-18 05:59:32,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:32,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823675934] [2022-01-18 05:59:32,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:32,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:32,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:32,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:32,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823675934] [2022-01-18 05:59:32,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823675934] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:32,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850199251] [2022-01-18 05:59:32,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:59:32,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:32,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:32,493 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 05:59:32,493 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 05:59:32,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:59:32,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:32,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 05:59:32,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:32,642 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 05:59:32,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:32,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:33,017 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:59:33,017 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 22 treesize of output 24 [2022-01-18 05:59:33,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:33,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850199251] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:33,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:33,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-01-18 05:59:33,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009700252] [2022-01-18 05:59:33,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:33,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:59:33,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:33,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:59:33,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:59:33,091 INFO L87 Difference]: Start difference. First operand 269 states and 541 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:33,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:33,951 INFO L93 Difference]: Finished difference Result 537 states and 1045 transitions. [2022-01-18 05:59:33,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 05:59:33,952 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 05:59:33,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:33,953 INFO L225 Difference]: With dead ends: 537 [2022-01-18 05:59:33,953 INFO L226 Difference]: Without dead ends: 505 [2022-01-18 05:59:33,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=353, Invalid=2403, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 05:59:33,954 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 134 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:33,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 318 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:59:33,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-01-18 05:59:33,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 270. [2022-01-18 05:59:33,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.0185873605947955) internal successors, (543), 269 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:33,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 543 transitions. [2022-01-18 05:59:33,960 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 543 transitions. Word has length 26 [2022-01-18 05:59:33,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:33,960 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 543 transitions. [2022-01-18 05:59:33,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:33,960 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 543 transitions. [2022-01-18 05:59:33,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 05:59:33,960 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:33,961 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:33,989 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 05:59:34,176 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,SelfDestructingSolverStorable13 [2022-01-18 05:59:34,176 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:34,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:34,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1311294588, now seen corresponding path program 9 times [2022-01-18 05:59:34,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:34,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925470804] [2022-01-18 05:59:34,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:34,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:34,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:34,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:34,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:34,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925470804] [2022-01-18 05:59:34,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925470804] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:34,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209723225] [2022-01-18 05:59:34,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:59:34,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:34,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:34,322 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 05:59:34,322 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 05:59:34,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:59:34,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:34,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 05:59:34,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:34,481 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 15 treesize of output 7 [2022-01-18 05:59:34,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:34,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:34,769 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:59:34,770 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 22 treesize of output 24 [2022-01-18 05:59:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:34,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209723225] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:34,850 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:34,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-01-18 05:59:34,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925361700] [2022-01-18 05:59:34,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:34,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:59:34,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:34,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:59:34,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:59:34,851 INFO L87 Difference]: Start difference. First operand 270 states and 543 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:35,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:35,883 INFO L93 Difference]: Finished difference Result 543 states and 1056 transitions. [2022-01-18 05:59:35,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 05:59:35,883 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 05:59:35,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:35,885 INFO L225 Difference]: With dead ends: 543 [2022-01-18 05:59:35,885 INFO L226 Difference]: Without dead ends: 511 [2022-01-18 05:59:35,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=488, Invalid=3172, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 05:59:35,886 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 193 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:35,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 357 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:59:35,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-01-18 05:59:35,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 267. [2022-01-18 05:59:35,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.007518796992481) internal successors, (534), 266 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:35,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 534 transitions. [2022-01-18 05:59:35,891 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 534 transitions. Word has length 26 [2022-01-18 05:59:35,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:35,891 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 534 transitions. [2022-01-18 05:59:35,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:35,891 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 534 transitions. [2022-01-18 05:59:35,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 05:59:35,892 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:35,892 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:35,917 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 05:59:36,107 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,SelfDestructingSolverStorable14 [2022-01-18 05:59:36,107 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:36,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:36,108 INFO L85 PathProgramCache]: Analyzing trace with hash 290845078, now seen corresponding path program 10 times [2022-01-18 05:59:36,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:36,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567490302] [2022-01-18 05:59:36,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:36,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:36,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:36,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:36,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567490302] [2022-01-18 05:59:36,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567490302] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:36,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197147675] [2022-01-18 05:59:36,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:59:36,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:36,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:36,247 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 05:59:36,248 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 05:59:36,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:59:36,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:36,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 05:59:36,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:36,359 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 05:59:36,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:36,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:36,690 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:59:36,691 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 22 treesize of output 24 [2022-01-18 05:59:36,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:36,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197147675] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:36,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:36,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-01-18 05:59:36,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559199287] [2022-01-18 05:59:36,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:36,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:59:36,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:36,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:59:36,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:59:36,770 INFO L87 Difference]: Start difference. First operand 267 states and 534 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:37,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:37,382 INFO L93 Difference]: Finished difference Result 435 states and 860 transitions. [2022-01-18 05:59:37,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 05:59:37,382 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 05:59:37,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:37,383 INFO L225 Difference]: With dead ends: 435 [2022-01-18 05:59:37,383 INFO L226 Difference]: Without dead ends: 407 [2022-01-18 05:59:37,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=311, Invalid=1851, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 05:59:37,384 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 124 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:37,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 254 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:59:37,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-01-18 05:59:37,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 263. [2022-01-18 05:59:37,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.0076335877862594) internal successors, (526), 262 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:37,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 526 transitions. [2022-01-18 05:59:37,389 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 526 transitions. Word has length 26 [2022-01-18 05:59:37,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:37,389 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 526 transitions. [2022-01-18 05:59:37,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:37,389 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 526 transitions. [2022-01-18 05:59:37,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 05:59:37,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:37,390 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:37,427 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 05:59:37,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:37,600 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:37,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:37,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1233884658, now seen corresponding path program 11 times [2022-01-18 05:59:37,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:37,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732204588] [2022-01-18 05:59:37,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:37,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:37,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:37,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:37,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:37,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732204588] [2022-01-18 05:59:37,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732204588] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:37,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316039669] [2022-01-18 05:59:37,770 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:59:37,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:37,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:37,771 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 05:59:37,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:59:37,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:37,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 05:59:37,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:37,807 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 05:59:37,949 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 15 treesize of output 7 [2022-01-18 05:59:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:38,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:38,206 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:59:38,206 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 22 treesize of output 24 [2022-01-18 05:59:38,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:38,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316039669] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:38,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:38,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-01-18 05:59:38,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556984252] [2022-01-18 05:59:38,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:38,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:59:38,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:38,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:59:38,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:59:38,258 INFO L87 Difference]: Start difference. First operand 263 states and 526 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:38,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:38,799 INFO L93 Difference]: Finished difference Result 491 states and 960 transitions. [2022-01-18 05:59:38,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 05:59:38,800 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 05:59:38,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:38,801 INFO L225 Difference]: With dead ends: 491 [2022-01-18 05:59:38,801 INFO L226 Difference]: Without dead ends: 459 [2022-01-18 05:59:38,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=266, Invalid=1896, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 05:59:38,802 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 154 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:38,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 260 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:59:38,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-01-18 05:59:38,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 275. [2022-01-18 05:59:38,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.010948905109489) internal successors, (551), 274 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:38,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 551 transitions. [2022-01-18 05:59:38,807 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 551 transitions. Word has length 26 [2022-01-18 05:59:38,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:38,807 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 551 transitions. [2022-01-18 05:59:38,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:38,807 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 551 transitions. [2022-01-18 05:59:38,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 05:59:38,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:38,808 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:38,825 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 05:59:39,025 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,SelfDestructingSolverStorable16 [2022-01-18 05:59:39,025 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:39,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:39,026 INFO L85 PathProgramCache]: Analyzing trace with hash -753110860, now seen corresponding path program 12 times [2022-01-18 05:59:39,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:39,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019998244] [2022-01-18 05:59:39,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:39,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:39,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:39,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:39,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:39,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019998244] [2022-01-18 05:59:39,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019998244] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:39,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242197293] [2022-01-18 05:59:39,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:59:39,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:39,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:39,175 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 05:59:39,176 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 05:59:39,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:59:39,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:39,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 05:59:39,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:39,321 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 05:59:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:39,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:39,618 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:59:39,618 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 22 treesize of output 24 [2022-01-18 05:59:39,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:39,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242197293] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:39,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:39,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-01-18 05:59:39,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552863013] [2022-01-18 05:59:39,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:39,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:59:39,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:39,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:59:39,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:59:39,676 INFO L87 Difference]: Start difference. First operand 275 states and 551 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:40,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:40,497 INFO L93 Difference]: Finished difference Result 543 states and 1055 transitions. [2022-01-18 05:59:40,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 05:59:40,498 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 05:59:40,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:40,499 INFO L225 Difference]: With dead ends: 543 [2022-01-18 05:59:40,499 INFO L226 Difference]: Without dead ends: 511 [2022-01-18 05:59:40,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=358, Invalid=2504, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 05:59:40,500 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 158 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:40,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 295 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:59:40,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-01-18 05:59:40,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 276. [2022-01-18 05:59:40,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.0109090909090908) internal successors, (553), 275 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:40,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 553 transitions. [2022-01-18 05:59:40,513 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 553 transitions. Word has length 26 [2022-01-18 05:59:40,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:40,513 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 553 transitions. [2022-01-18 05:59:40,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:40,514 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 553 transitions. [2022-01-18 05:59:40,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 05:59:40,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:40,514 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:40,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 05:59:40,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 05:59:40,727 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:40,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:40,728 INFO L85 PathProgramCache]: Analyzing trace with hash 673131506, now seen corresponding path program 13 times [2022-01-18 05:59:40,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:40,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457756561] [2022-01-18 05:59:40,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:40,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:40,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:40,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:40,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:40,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457756561] [2022-01-18 05:59:40,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457756561] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:40,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76012228] [2022-01-18 05:59:40,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:59:40,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:40,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:40,865 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:59:40,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:40,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 05:59:40,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:40,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 05:59:41,011 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 05:59:41,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:41,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:41,330 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:59:41,330 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 22 treesize of output 24 [2022-01-18 05:59:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:41,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76012228] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:41,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:41,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-01-18 05:59:41,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487286653] [2022-01-18 05:59:41,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:41,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:59:41,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:41,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:59:41,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:59:41,393 INFO L87 Difference]: Start difference. First operand 276 states and 553 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:42,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:42,428 INFO L93 Difference]: Finished difference Result 549 states and 1066 transitions. [2022-01-18 05:59:42,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 05:59:42,429 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 05:59:42,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:42,430 INFO L225 Difference]: With dead ends: 549 [2022-01-18 05:59:42,430 INFO L226 Difference]: Without dead ends: 517 [2022-01-18 05:59:42,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=491, Invalid=3291, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 05:59:42,431 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 192 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:42,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 306 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:59:42,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-01-18 05:59:42,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 273. [2022-01-18 05:59:42,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.0) internal successors, (544), 272 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:42,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 544 transitions. [2022-01-18 05:59:42,437 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 544 transitions. Word has length 26 [2022-01-18 05:59:42,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:42,437 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 544 transitions. [2022-01-18 05:59:42,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:42,438 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 544 transitions. [2022-01-18 05:59:42,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 05:59:42,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:42,438 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:42,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 05:59:42,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:42,671 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:42,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:42,672 INFO L85 PathProgramCache]: Analyzing trace with hash -347318004, now seen corresponding path program 14 times [2022-01-18 05:59:42,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:42,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200290778] [2022-01-18 05:59:42,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:42,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:42,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:42,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:42,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:42,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200290778] [2022-01-18 05:59:42,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200290778] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:42,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467580428] [2022-01-18 05:59:42,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:59:42,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:42,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:42,817 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:59:42,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 05:59:42,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:59:42,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:42,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 05:59:42,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:42,939 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 05:59:43,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:43,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:43,286 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:59:43,286 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 22 treesize of output 24 [2022-01-18 05:59:43,344 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:43,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467580428] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:43,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:43,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-01-18 05:59:43,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017726160] [2022-01-18 05:59:43,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:43,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:59:43,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:43,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:59:43,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:59:43,345 INFO L87 Difference]: Start difference. First operand 273 states and 544 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:43,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:43,991 INFO L93 Difference]: Finished difference Result 441 states and 870 transitions. [2022-01-18 05:59:43,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 05:59:43,992 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 05:59:43,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:43,993 INFO L225 Difference]: With dead ends: 441 [2022-01-18 05:59:43,993 INFO L226 Difference]: Without dead ends: 413 [2022-01-18 05:59:43,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=318, Invalid=1938, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 05:59:43,994 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 131 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:43,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 247 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:59:43,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-01-18 05:59:43,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 266. [2022-01-18 05:59:43,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.0037735849056606) internal successors, (531), 265 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:43,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 531 transitions. [2022-01-18 05:59:43,998 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 531 transitions. Word has length 26 [2022-01-18 05:59:43,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:43,998 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 531 transitions. [2022-01-18 05:59:43,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:43,998 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 531 transitions. [2022-01-18 05:59:43,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 05:59:43,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:43,999 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:44,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 05:59:44,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:44,207 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:44,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:44,208 INFO L85 PathProgramCache]: Analyzing trace with hash 601747836, now seen corresponding path program 15 times [2022-01-18 05:59:44,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:44,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560181035] [2022-01-18 05:59:44,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:44,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:44,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:44,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:44,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560181035] [2022-01-18 05:59:44,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560181035] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:44,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8292869] [2022-01-18 05:59:44,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:59:44,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:44,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:44,347 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:59:44,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 05:59:44,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:59:44,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:44,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:59:44,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:44,546 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 05:59:44,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:44,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:44,889 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:59:44,890 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 22 treesize of output 24 [2022-01-18 05:59:44,957 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:44,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8292869] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:44,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:44,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-01-18 05:59:44,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650275537] [2022-01-18 05:59:44,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:44,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:59:44,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:44,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:59:44,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:59:44,959 INFO L87 Difference]: Start difference. First operand 266 states and 531 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:45,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:45,501 INFO L93 Difference]: Finished difference Result 467 states and 909 transitions. [2022-01-18 05:59:45,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 05:59:45,502 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 05:59:45,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:45,503 INFO L225 Difference]: With dead ends: 467 [2022-01-18 05:59:45,503 INFO L226 Difference]: Without dead ends: 435 [2022-01-18 05:59:45,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=267, Invalid=1895, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 05:59:45,504 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 147 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:45,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 242 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:59:45,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-01-18 05:59:45,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 263. [2022-01-18 05:59:45,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.00381679389313) internal successors, (525), 262 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:45,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 525 transitions. [2022-01-18 05:59:45,509 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 525 transitions. Word has length 26 [2022-01-18 05:59:45,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:45,509 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 525 transitions. [2022-01-18 05:59:45,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:45,509 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 525 transitions. [2022-01-18 05:59:45,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 05:59:45,510 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:45,510 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:45,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 05:59:45,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:45,712 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:45,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:45,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1385247682, now seen corresponding path program 16 times [2022-01-18 05:59:45,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:45,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153951887] [2022-01-18 05:59:45,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:45,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:45,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:45,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:45,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:45,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153951887] [2022-01-18 05:59:45,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153951887] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:45,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207773344] [2022-01-18 05:59:45,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:59:45,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:45,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:45,853 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:59:45,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 05:59:45,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:59:45,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:45,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 05:59:45,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:45,991 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 05:59:46,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:46,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:46,336 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:59:46,336 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 22 treesize of output 24 [2022-01-18 05:59:46,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:46,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207773344] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:46,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:46,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-01-18 05:59:46,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007649797] [2022-01-18 05:59:46,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:46,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:59:46,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:46,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:59:46,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:59:46,388 INFO L87 Difference]: Start difference. First operand 263 states and 525 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:47,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:47,205 INFO L93 Difference]: Finished difference Result 520 states and 1006 transitions. [2022-01-18 05:59:47,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 05:59:47,205 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 05:59:47,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:47,207 INFO L225 Difference]: With dead ends: 520 [2022-01-18 05:59:47,207 INFO L226 Difference]: Without dead ends: 488 [2022-01-18 05:59:47,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=361, Invalid=2501, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 05:59:47,208 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 151 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:47,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 218 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:59:47,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-01-18 05:59:47,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 264. [2022-01-18 05:59:47,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.0038022813688214) internal successors, (527), 263 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:47,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 527 transitions. [2022-01-18 05:59:47,212 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 527 transitions. Word has length 26 [2022-01-18 05:59:47,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:47,212 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 527 transitions. [2022-01-18 05:59:47,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:47,212 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 527 transitions. [2022-01-18 05:59:47,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 05:59:47,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:47,213 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:47,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 05:59:47,446 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,SelfDestructingSolverStorable21 [2022-01-18 05:59:47,446 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:47,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:47,446 INFO L85 PathProgramCache]: Analyzing trace with hash 40994684, now seen corresponding path program 17 times [2022-01-18 05:59:47,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:47,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24689288] [2022-01-18 05:59:47,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:47,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:47,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:47,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:47,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:47,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24689288] [2022-01-18 05:59:47,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24689288] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:47,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138455513] [2022-01-18 05:59:47,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:59:47,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:47,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:47,583 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:59:47,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 05:59:47,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:59:47,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:47,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:59:47,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:47,739 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 05:59:47,902 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:47,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:48,094 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:59:48,094 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 22 treesize of output 24 [2022-01-18 05:59:48,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:48,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138455513] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:48,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:48,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-01-18 05:59:48,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420679512] [2022-01-18 05:59:48,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:48,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:59:48,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:48,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:59:48,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:59:48,157 INFO L87 Difference]: Start difference. First operand 264 states and 527 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:49,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:49,290 INFO L93 Difference]: Finished difference Result 529 states and 1022 transitions. [2022-01-18 05:59:49,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 05:59:49,291 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 05:59:49,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:49,292 INFO L225 Difference]: With dead ends: 529 [2022-01-18 05:59:49,292 INFO L226 Difference]: Without dead ends: 497 [2022-01-18 05:59:49,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=496, Invalid=3286, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 05:59:49,293 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 178 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:49,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 366 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:59:49,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-01-18 05:59:49,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 255. [2022-01-18 05:59:49,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.9921259842519685) internal successors, (506), 254 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:49,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 506 transitions. [2022-01-18 05:59:49,298 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 506 transitions. Word has length 26 [2022-01-18 05:59:49,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:49,298 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 506 transitions. [2022-01-18 05:59:49,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:49,298 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 506 transitions. [2022-01-18 05:59:49,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 05:59:49,299 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:49,299 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:49,314 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 05:59:49,508 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,SelfDestructingSolverStorable22 [2022-01-18 05:59:49,508 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:49,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:49,508 INFO L85 PathProgramCache]: Analyzing trace with hash -979454826, now seen corresponding path program 18 times [2022-01-18 05:59:49,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:49,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739948922] [2022-01-18 05:59:49,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:49,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:49,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:49,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739948922] [2022-01-18 05:59:49,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739948922] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:49,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247531419] [2022-01-18 05:59:49,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:59:49,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:49,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:49,646 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:59:49,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 05:59:49,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:59:49,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:49,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 05:59:49,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:49,770 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 05:59:49,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:49,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:50,131 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:59:50,132 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 22 treesize of output 24 [2022-01-18 05:59:50,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:50,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247531419] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:50,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:50,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-01-18 05:59:50,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404584454] [2022-01-18 05:59:50,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:50,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:59:50,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:50,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:59:50,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:59:50,180 INFO L87 Difference]: Start difference. First operand 255 states and 506 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:50,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:50,926 INFO L93 Difference]: Finished difference Result 418 states and 821 transitions. [2022-01-18 05:59:50,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 05:59:50,927 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 05:59:50,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:50,928 INFO L225 Difference]: With dead ends: 418 [2022-01-18 05:59:50,928 INFO L226 Difference]: Without dead ends: 390 [2022-01-18 05:59:50,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=319, Invalid=1937, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 05:59:50,928 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 118 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:50,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 269 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:59:50,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-01-18 05:59:50,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 233. [2022-01-18 05:59:50,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.0) internal successors, (464), 232 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:50,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 464 transitions. [2022-01-18 05:59:50,932 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 464 transitions. Word has length 26 [2022-01-18 05:59:50,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:50,932 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 464 transitions. [2022-01-18 05:59:50,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:50,932 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 464 transitions. [2022-01-18 05:59:50,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:59:50,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:50,933 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:50,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-01-18 05:59:51,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:51,142 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:51,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:51,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1446761785, now seen corresponding path program 19 times [2022-01-18 05:59:51,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:51,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766081558] [2022-01-18 05:59:51,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:51,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:51,203 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:51,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:51,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766081558] [2022-01-18 05:59:51,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766081558] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:51,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056102708] [2022-01-18 05:59:51,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:59:51,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:51,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:51,205 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:59:51,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 05:59:51,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:51,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 05:59:51,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:51,287 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 05:59:51,298 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:51,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:51,364 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 05:59:51,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-01-18 05:59:51,385 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:51,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056102708] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:51,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:51,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 05:59:51,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874276008] [2022-01-18 05:59:51,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:51,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 05:59:51,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:51,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 05:59:51,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-01-18 05:59:51,386 INFO L87 Difference]: Start difference. First operand 233 states and 464 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:51,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:51,608 INFO L93 Difference]: Finished difference Result 362 states and 698 transitions. [2022-01-18 05:59:51,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:59:51,609 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:59:51,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:51,610 INFO L225 Difference]: With dead ends: 362 [2022-01-18 05:59:51,610 INFO L226 Difference]: Without dead ends: 362 [2022-01-18 05:59:51,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:59:51,610 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 119 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:51,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 300 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:59:51,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-01-18 05:59:51,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 238. [2022-01-18 05:59:51,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.970464135021097) internal successors, (467), 237 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:51,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 467 transitions. [2022-01-18 05:59:51,614 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 467 transitions. Word has length 29 [2022-01-18 05:59:51,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:51,614 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 467 transitions. [2022-01-18 05:59:51,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:51,614 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 467 transitions. [2022-01-18 05:59:51,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 05:59:51,615 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:51,615 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:51,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 05:59:51,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:51,823 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:51,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:51,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1247278231, now seen corresponding path program 20 times [2022-01-18 05:59:51,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:51,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245519909] [2022-01-18 05:59:51,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:51,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:51,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:51,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:51,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245519909] [2022-01-18 05:59:51,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245519909] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:51,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874814461] [2022-01-18 05:59:51,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:59:51,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:51,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:51,850 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:59:51,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 05:59:51,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:59:51,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:51,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:59:51,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:51,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:51,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:51,957 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:51,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874814461] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:51,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:51,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 05:59:51,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790199265] [2022-01-18 05:59:51,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:51,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 05:59:51,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:51,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 05:59:51,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-18 05:59:51,967 INFO L87 Difference]: Start difference. First operand 238 states and 467 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:51,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:51,987 INFO L93 Difference]: Finished difference Result 534 states and 1045 transitions. [2022-01-18 05:59:51,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:59:51,988 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 05:59:51,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:51,989 INFO L225 Difference]: With dead ends: 534 [2022-01-18 05:59:51,989 INFO L226 Difference]: Without dead ends: 491 [2022-01-18 05:59:51,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 59 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 05:59:51,990 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 53 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:51,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 81 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:59:51,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-01-18 05:59:52,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 411. [2022-01-18 05:59:52,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0634146341463415) internal successors, (846), 410 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:52,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 846 transitions. [2022-01-18 05:59:52,005 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 846 transitions. Word has length 30 [2022-01-18 05:59:52,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:52,006 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 846 transitions. [2022-01-18 05:59:52,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:52,006 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 846 transitions. [2022-01-18 05:59:52,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:59:52,006 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:52,006 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:52,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 05:59:52,219 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,SelfDestructingSolverStorable25 [2022-01-18 05:59:52,219 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:52,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:52,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1300048086, now seen corresponding path program 21 times [2022-01-18 05:59:52,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:52,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79317640] [2022-01-18 05:59:52,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:52,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:52,491 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:52,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:52,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79317640] [2022-01-18 05:59:52,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79317640] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:52,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895001887] [2022-01-18 05:59:52,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:59:52,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:52,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:52,493 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:59:52,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 05:59:52,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 05:59:52,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:52,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:59:52,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:52,744 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 05:59:52,745 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 05:59:52,867 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:52,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:53,236 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 05:59:53,236 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 42 treesize of output 60 [2022-01-18 05:59:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:53,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895001887] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:53,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:53,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 37 [2022-01-18 05:59:53,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995580013] [2022-01-18 05:59:53,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:53,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 05:59:53,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:53,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 05:59:53,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 05:59:53,298 INFO L87 Difference]: Start difference. First operand 411 states and 846 transitions. Second operand has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 37 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:54,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:54,660 INFO L93 Difference]: Finished difference Result 840 states and 1688 transitions. [2022-01-18 05:59:54,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 05:59:54,660 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 37 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:59:54,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:54,662 INFO L225 Difference]: With dead ends: 840 [2022-01-18 05:59:54,662 INFO L226 Difference]: Without dead ends: 792 [2022-01-18 05:59:54,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=398, Invalid=4158, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 05:59:54,663 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 225 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 1677 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:54,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 621 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1677 Invalid, 0 Unknown, 113 Unchecked, 0.6s Time] [2022-01-18 05:59:54,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-01-18 05:59:54,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 429. [2022-01-18 05:59:54,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.0514018691588785) internal successors, (878), 428 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:54,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 878 transitions. [2022-01-18 05:59:54,670 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 878 transitions. Word has length 33 [2022-01-18 05:59:54,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:54,670 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 878 transitions. [2022-01-18 05:59:54,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 37 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:54,670 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 878 transitions. [2022-01-18 05:59:54,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:59:54,671 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:54,671 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:54,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 05:59:54,887 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,SelfDestructingSolverStorable26 [2022-01-18 05:59:54,888 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:54,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:54,888 INFO L85 PathProgramCache]: Analyzing trace with hash 2063366420, now seen corresponding path program 22 times [2022-01-18 05:59:54,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:54,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191838246] [2022-01-18 05:59:54,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:54,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:54,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:55,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:55,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191838246] [2022-01-18 05:59:55,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191838246] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:55,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940408035] [2022-01-18 05:59:55,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:59:55,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:55,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:55,180 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:59:55,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 05:59:55,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:59:55,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:55,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:59:55,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:55,478 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 05:59:55,478 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 29 treesize of output 13 [2022-01-18 05:59:55,611 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:55,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:56,009 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 05:59:56,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 05:59:56,073 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:56,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940408035] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:56,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:56,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 39 [2022-01-18 05:59:56,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782889056] [2022-01-18 05:59:56,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:56,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 05:59:56,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:56,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 05:59:56,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1408, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 05:59:56,074 INFO L87 Difference]: Start difference. First operand 429 states and 878 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:57,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:57,775 INFO L93 Difference]: Finished difference Result 990 states and 1989 transitions. [2022-01-18 05:59:57,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 05:59:57,776 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:59:57,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:57,778 INFO L225 Difference]: With dead ends: 990 [2022-01-18 05:59:57,778 INFO L226 Difference]: Without dead ends: 942 [2022-01-18 05:59:57,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1746 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=590, Invalid=6052, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 05:59:57,779 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 310 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 1624 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:57,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 563 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1624 Invalid, 0 Unknown, 14 Unchecked, 0.6s Time] [2022-01-18 05:59:57,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2022-01-18 05:59:57,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 432. [2022-01-18 05:59:57,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.0580046403712298) internal successors, (887), 431 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:57,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 887 transitions. [2022-01-18 05:59:57,786 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 887 transitions. Word has length 33 [2022-01-18 05:59:57,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:57,786 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 887 transitions. [2022-01-18 05:59:57,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:57,786 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 887 transitions. [2022-01-18 05:59:57,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:59:57,787 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:57,787 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:57,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 05:59:58,002 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,SelfDestructingSolverStorable27 [2022-01-18 05:59:58,002 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:58,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:58,003 INFO L85 PathProgramCache]: Analyzing trace with hash -952229162, now seen corresponding path program 23 times [2022-01-18 05:59:58,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:58,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320834622] [2022-01-18 05:59:58,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:58,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:58,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:58,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:58,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320834622] [2022-01-18 05:59:58,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320834622] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:58,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117505722] [2022-01-18 05:59:58,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:59:58,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:58,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:58,312 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:59:58,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 05:59:58,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:59:58,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:58,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:59:58,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:58,656 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 05:59:58,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 05:59:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:58,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:59,324 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 05:59:59,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 63 [2022-01-18 05:59:59,396 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:59,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117505722] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:59,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:59,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 43 [2022-01-18 05:59:59,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372785536] [2022-01-18 05:59:59,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:59,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-18 05:59:59,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:59,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-18 05:59:59,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1709, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 05:59:59,398 INFO L87 Difference]: Start difference. First operand 432 states and 887 transitions. Second operand has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 43 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:02,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:00:02,260 INFO L93 Difference]: Finished difference Result 1010 states and 2038 transitions. [2022-01-18 06:00:02,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-18 06:00:02,261 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 43 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:00:02,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:00:02,263 INFO L225 Difference]: With dead ends: 1010 [2022-01-18 06:00:02,263 INFO L226 Difference]: Without dead ends: 962 [2022-01-18 06:00:02,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2935 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=843, Invalid=9459, Unknown=0, NotChecked=0, Total=10302 [2022-01-18 06:00:02,265 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 295 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 2556 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 2683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:00:02,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 650 Invalid, 2683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2556 Invalid, 0 Unknown, 36 Unchecked, 0.9s Time] [2022-01-18 06:00:02,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2022-01-18 06:00:02,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 433. [2022-01-18 06:00:02,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 2.0578703703703702) internal successors, (889), 432 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:02,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 889 transitions. [2022-01-18 06:00:02,272 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 889 transitions. Word has length 33 [2022-01-18 06:00:02,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:00:02,272 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 889 transitions. [2022-01-18 06:00:02,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 43 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:02,273 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 889 transitions. [2022-01-18 06:00:02,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:00:02,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:00:02,273 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:00:02,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 06:00:02,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 06:00:02,481 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:00:02,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:00:02,482 INFO L85 PathProgramCache]: Analyzing trace with hash 433393428, now seen corresponding path program 24 times [2022-01-18 06:00:02,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:00:02,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138515083] [2022-01-18 06:00:02,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:00:02,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:00:02,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:02,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:00:02,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138515083] [2022-01-18 06:00:02,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138515083] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:00:02,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956605455] [2022-01-18 06:00:02,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:00:02,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:02,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:00:02,765 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 06:00:02,766 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 06:00:02,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:00:02,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:00:02,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 06:00:02,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:00:03,102 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:00:03,102 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 06:00:03,249 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:03,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:00:03,700 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:00:03,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:00:03,752 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:03,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956605455] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:00:03,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:00:03,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 39 [2022-01-18 06:00:03,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347311178] [2022-01-18 06:00:03,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:00:03,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 06:00:03,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:00:03,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 06:00:03,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1402, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 06:00:03,754 INFO L87 Difference]: Start difference. First operand 433 states and 889 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:06,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:00:06,061 INFO L93 Difference]: Finished difference Result 1121 states and 2248 transitions. [2022-01-18 06:00:06,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 06:00:06,061 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:00:06,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:00:06,064 INFO L225 Difference]: With dead ends: 1121 [2022-01-18 06:00:06,064 INFO L226 Difference]: Without dead ends: 1077 [2022-01-18 06:00:06,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1981 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=726, Invalid=6756, Unknown=0, NotChecked=0, Total=7482 [2022-01-18 06:00:06,066 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 359 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 2124 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 2286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:00:06,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 583 Invalid, 2286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2124 Invalid, 0 Unknown, 33 Unchecked, 0.8s Time] [2022-01-18 06:00:06,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2022-01-18 06:00:06,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 436. [2022-01-18 06:00:06,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 2.057471264367816) internal successors, (895), 435 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:06,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 895 transitions. [2022-01-18 06:00:06,073 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 895 transitions. Word has length 33 [2022-01-18 06:00:06,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:00:06,073 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 895 transitions. [2022-01-18 06:00:06,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:06,073 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 895 transitions. [2022-01-18 06:00:06,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:00:06,074 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:00:06,074 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:00:06,090 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 06:00:06,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:06,275 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:00:06,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:00:06,275 INFO L85 PathProgramCache]: Analyzing trace with hash -207717162, now seen corresponding path program 25 times [2022-01-18 06:00:06,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:00:06,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351582902] [2022-01-18 06:00:06,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:00:06,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:00:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:06,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:00:06,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351582902] [2022-01-18 06:00:06,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351582902] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:00:06,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227581174] [2022-01-18 06:00:06,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:00:06,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:06,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:00:06,530 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:00:06,530 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 06:00:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:06,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:00:06,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:00:06,789 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:00:06,789 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 06:00:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:06,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:00:07,368 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:00:07,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:00:07,443 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:07,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227581174] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:00:07,444 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:00:07,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 39 [2022-01-18 06:00:07,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220759893] [2022-01-18 06:00:07,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:00:07,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 06:00:07,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:00:07,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 06:00:07,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1397, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 06:00:07,445 INFO L87 Difference]: Start difference. First operand 436 states and 895 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:10,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:00:10,520 INFO L93 Difference]: Finished difference Result 1186 states and 2391 transitions. [2022-01-18 06:00:10,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-18 06:00:10,521 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:00:10,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:00:10,524 INFO L225 Difference]: With dead ends: 1186 [2022-01-18 06:00:10,524 INFO L226 Difference]: Without dead ends: 1142 [2022-01-18 06:00:10,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3266 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1159, Invalid=9761, Unknown=0, NotChecked=0, Total=10920 [2022-01-18 06:00:10,525 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 400 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 2149 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 2469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 2149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:00:10,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 577 Invalid, 2469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 2149 Invalid, 0 Unknown, 124 Unchecked, 0.8s Time] [2022-01-18 06:00:10,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2022-01-18 06:00:10,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 442. [2022-01-18 06:00:10,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 2.058956916099773) internal successors, (908), 441 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:10,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 908 transitions. [2022-01-18 06:00:10,533 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 908 transitions. Word has length 33 [2022-01-18 06:00:10,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:00:10,534 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 908 transitions. [2022-01-18 06:00:10,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:10,534 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 908 transitions. [2022-01-18 06:00:10,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:00:10,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:00:10,534 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:00:10,552 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 06:00:10,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:10,747 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:00:10,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:00:10,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1218525204, now seen corresponding path program 26 times [2022-01-18 06:00:10,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:00:10,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847625331] [2022-01-18 06:00:10,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:00:10,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:00:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:11,010 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:11,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:00:11,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847625331] [2022-01-18 06:00:11,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847625331] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:00:11,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437645386] [2022-01-18 06:00:11,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:00:11,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:11,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:00:11,011 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 06:00:11,012 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 06:00:11,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:00:11,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:00:11,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:00:11,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:00:11,296 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 06:00:11,296 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 29 treesize of output 13 [2022-01-18 06:00:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:11,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:00:11,882 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:00:11,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:00:11,941 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:11,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437645386] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:00:11,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:00:11,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 39 [2022-01-18 06:00:11,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282897878] [2022-01-18 06:00:11,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:00:11,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 06:00:11,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:00:11,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 06:00:11,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1396, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 06:00:11,943 INFO L87 Difference]: Start difference. First operand 442 states and 908 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:15,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:00:15,860 INFO L93 Difference]: Finished difference Result 1365 states and 2739 transitions. [2022-01-18 06:00:15,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-18 06:00:15,860 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:00:15,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:00:15,864 INFO L225 Difference]: With dead ends: 1365 [2022-01-18 06:00:15,864 INFO L226 Difference]: Without dead ends: 1325 [2022-01-18 06:00:15,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 40 SyntacticMatches, 11 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3942 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1492, Invalid=11164, Unknown=0, NotChecked=0, Total=12656 [2022-01-18 06:00:15,866 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 462 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 2581 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 2863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 2581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:00:15,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 672 Invalid, 2863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 2581 Invalid, 0 Unknown, 40 Unchecked, 1.0s Time] [2022-01-18 06:00:15,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2022-01-18 06:00:15,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 450. [2022-01-18 06:00:15,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.0579064587973273) internal successors, (924), 449 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:15,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 924 transitions. [2022-01-18 06:00:15,877 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 924 transitions. Word has length 33 [2022-01-18 06:00:15,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:00:15,877 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 924 transitions. [2022-01-18 06:00:15,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:15,877 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 924 transitions. [2022-01-18 06:00:15,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:00:15,878 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:00:15,878 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:00:15,908 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 06:00:16,095 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,SelfDestructingSolverStorable31 [2022-01-18 06:00:16,096 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:00:16,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:00:16,096 INFO L85 PathProgramCache]: Analyzing trace with hash -560176048, now seen corresponding path program 27 times [2022-01-18 06:00:16,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:00:16,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420764708] [2022-01-18 06:00:16,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:00:16,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:00:16,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:16,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:00:16,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420764708] [2022-01-18 06:00:16,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420764708] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:00:16,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374880964] [2022-01-18 06:00:16,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:00:16,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:16,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:00:16,399 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 06:00:16,399 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 06:00:16,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 06:00:16,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:00:16,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:00:16,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:00:16,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:00:16,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:00:16,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 06:00:17,085 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:17,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:00:17,577 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:00:17,578 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 42 treesize of output 60 [2022-01-18 06:00:17,649 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:17,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374880964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:00:17,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:00:17,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:00:17,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293466386] [2022-01-18 06:00:17,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:00:17,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:00:17,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:00:17,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:00:17,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:00:17,652 INFO L87 Difference]: Start difference. First operand 450 states and 924 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:18,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:00:18,664 INFO L93 Difference]: Finished difference Result 657 states and 1310 transitions. [2022-01-18 06:00:18,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 06:00:18,664 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:00:18,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:00:18,666 INFO L225 Difference]: With dead ends: 657 [2022-01-18 06:00:18,667 INFO L226 Difference]: Without dead ends: 625 [2022-01-18 06:00:18,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=320, Invalid=3220, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 06:00:18,668 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 153 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:00:18,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 707 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 997 Invalid, 0 Unknown, 235 Unchecked, 0.4s Time] [2022-01-18 06:00:18,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-01-18 06:00:18,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 474. [2022-01-18 06:00:18,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 2.059196617336152) internal successors, (974), 473 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:18,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 974 transitions. [2022-01-18 06:00:18,675 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 974 transitions. Word has length 33 [2022-01-18 06:00:18,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:00:18,675 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 974 transitions. [2022-01-18 06:00:18,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:18,675 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 974 transitions. [2022-01-18 06:00:18,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:00:18,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:00:18,676 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:00:18,693 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 06:00:18,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:18,893 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:00:18,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:00:18,893 INFO L85 PathProgramCache]: Analyzing trace with hash 2059320862, now seen corresponding path program 28 times [2022-01-18 06:00:18,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:00:18,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87327973] [2022-01-18 06:00:18,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:00:18,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:00:18,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:19,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:00:19,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87327973] [2022-01-18 06:00:19,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87327973] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:00:19,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617189224] [2022-01-18 06:00:19,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:00:19,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:19,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:00:19,211 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 06:00:19,211 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 06:00:19,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:00:19,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:00:19,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:00:19,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:00:19,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:00:19,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:00:19,627 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 27 treesize of output 13 [2022-01-18 06:00:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:19,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:00:20,160 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:00:20,160 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 42 treesize of output 60 [2022-01-18 06:00:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:20,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617189224] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:00:20,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:00:20,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:00:20,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752795658] [2022-01-18 06:00:20,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:00:20,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:00:20,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:00:20,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:00:20,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:00:20,241 INFO L87 Difference]: Start difference. First operand 474 states and 974 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:21,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:00:21,489 INFO L93 Difference]: Finished difference Result 858 states and 1706 transitions. [2022-01-18 06:00:21,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 06:00:21,489 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:00:21,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:00:21,492 INFO L225 Difference]: With dead ends: 858 [2022-01-18 06:00:21,492 INFO L226 Difference]: Without dead ends: 814 [2022-01-18 06:00:21,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 39 SyntacticMatches, 10 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=415, Invalid=4697, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 06:00:21,493 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 219 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 1281 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 1796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 467 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:00:21,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 597 Invalid, 1796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1281 Invalid, 0 Unknown, 467 Unchecked, 0.5s Time] [2022-01-18 06:00:21,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-01-18 06:00:21,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 482. [2022-01-18 06:00:21,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.0644490644490645) internal successors, (993), 481 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:21,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 993 transitions. [2022-01-18 06:00:21,499 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 993 transitions. Word has length 33 [2022-01-18 06:00:21,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:00:21,499 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 993 transitions. [2022-01-18 06:00:21,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:21,500 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 993 transitions. [2022-01-18 06:00:21,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:00:21,500 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:00:21,500 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:00:21,519 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 06:00:21,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:21,714 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:00:21,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:00:21,715 INFO L85 PathProgramCache]: Analyzing trace with hash 719195666, now seen corresponding path program 29 times [2022-01-18 06:00:21,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:00:21,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455042991] [2022-01-18 06:00:21,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:00:21,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:00:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:21,997 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:21,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:00:21,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455042991] [2022-01-18 06:00:21,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455042991] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:00:21,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61904465] [2022-01-18 06:00:21,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:00:21,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:21,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:00:21,998 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 06:00:21,999 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 06:00:22,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:00:22,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:00:22,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:00:22,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:00:22,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:00:22,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:00:22,429 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 06:00:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:22,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:00:23,116 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:00:23,116 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 49 treesize of output 63 [2022-01-18 06:00:23,168 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:23,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61904465] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:00:23,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:00:23,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-01-18 06:00:23,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224338134] [2022-01-18 06:00:23,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:00:23,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 06:00:23,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:00:23,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 06:00:23,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1789, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 06:00:23,169 INFO L87 Difference]: Start difference. First operand 482 states and 993 transitions. Second operand has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:25,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:00:25,004 INFO L93 Difference]: Finished difference Result 938 states and 1891 transitions. [2022-01-18 06:00:25,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 06:00:25,004 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:00:25,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:00:25,007 INFO L225 Difference]: With dead ends: 938 [2022-01-18 06:00:25,007 INFO L226 Difference]: Without dead ends: 895 [2022-01-18 06:00:25,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 36 SyntacticMatches, 10 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2048 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=557, Invalid=6415, Unknown=0, NotChecked=0, Total=6972 [2022-01-18 06:00:25,008 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 251 mSDsluCounter, 1029 mSDsCounter, 0 mSdLazyCounter, 1542 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 2423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 825 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:00:25,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 611 Invalid, 2423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1542 Invalid, 0 Unknown, 825 Unchecked, 0.6s Time] [2022-01-18 06:00:25,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-01-18 06:00:25,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 489. [2022-01-18 06:00:25,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.057377049180328) internal successors, (1004), 488 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:25,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1004 transitions. [2022-01-18 06:00:25,015 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1004 transitions. Word has length 33 [2022-01-18 06:00:25,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:00:25,015 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 1004 transitions. [2022-01-18 06:00:25,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:25,015 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1004 transitions. [2022-01-18 06:00:25,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:00:25,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:00:25,016 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:00:25,032 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 06:00:25,232 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,SelfDestructingSolverStorable34 [2022-01-18 06:00:25,232 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:00:25,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:00:25,232 INFO L85 PathProgramCache]: Analyzing trace with hash -57190306, now seen corresponding path program 30 times [2022-01-18 06:00:25,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:00:25,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561088312] [2022-01-18 06:00:25,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:00:25,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:00:25,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:25,544 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:25,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:00:25,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561088312] [2022-01-18 06:00:25,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561088312] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:00:25,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287589550] [2022-01-18 06:00:25,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:00:25,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:25,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:00:25,545 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 06:00:25,546 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 06:00:25,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:00:25,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:00:25,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 06:00:25,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:00:25,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:00:25,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:00:25,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 06:00:26,118 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:26,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:00:26,529 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:00:26,529 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 42 treesize of output 60 [2022-01-18 06:00:26,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:26,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287589550] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:00:26,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:00:26,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:00:26,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601753978] [2022-01-18 06:00:26,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:00:26,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:00:26,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:00:26,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:00:26,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:00:26,588 INFO L87 Difference]: Start difference. First operand 489 states and 1004 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:27,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:00:27,990 INFO L93 Difference]: Finished difference Result 772 states and 1570 transitions. [2022-01-18 06:00:27,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 06:00:27,990 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:00:27,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:00:27,992 INFO L225 Difference]: With dead ends: 772 [2022-01-18 06:00:27,992 INFO L226 Difference]: Without dead ends: 753 [2022-01-18 06:00:27,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 38 SyntacticMatches, 10 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=454, Invalid=4802, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 06:00:27,993 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 132 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 1277 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:00:27,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 460 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1277 Invalid, 0 Unknown, 114 Unchecked, 0.5s Time] [2022-01-18 06:00:27,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-01-18 06:00:27,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 485. [2022-01-18 06:00:27,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 2.06198347107438) internal successors, (998), 484 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:27,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 998 transitions. [2022-01-18 06:00:28,000 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 998 transitions. Word has length 33 [2022-01-18 06:00:28,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:00:28,000 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 998 transitions. [2022-01-18 06:00:28,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:28,000 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 998 transitions. [2022-01-18 06:00:28,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:00:28,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:00:28,001 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:00:28,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-18 06:00:28,216 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,SelfDestructingSolverStorable35 [2022-01-18 06:00:28,216 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:00:28,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:00:28,216 INFO L85 PathProgramCache]: Analyzing trace with hash 426212954, now seen corresponding path program 31 times [2022-01-18 06:00:28,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:00:28,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211338007] [2022-01-18 06:00:28,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:00:28,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:00:28,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:28,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:00:28,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211338007] [2022-01-18 06:00:28,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211338007] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:00:28,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762953915] [2022-01-18 06:00:28,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:00:28,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:28,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:00:28,565 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 06:00:28,565 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 06:00:28,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:28,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:00:28,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:00:29,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:00:29,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:00:29,014 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 27 treesize of output 13 [2022-01-18 06:00:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:29,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:00:29,606 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:00:29,606 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 42 treesize of output 60 [2022-01-18 06:00:29,682 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:29,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762953915] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:00:29,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:00:29,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:00:29,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107942685] [2022-01-18 06:00:29,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:00:29,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:00:29,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:00:29,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:00:29,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:00:29,685 INFO L87 Difference]: Start difference. First operand 485 states and 998 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:31,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:00:31,261 INFO L93 Difference]: Finished difference Result 930 states and 1875 transitions. [2022-01-18 06:00:31,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 06:00:31,261 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:00:31,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:00:31,263 INFO L225 Difference]: With dead ends: 930 [2022-01-18 06:00:31,263 INFO L226 Difference]: Without dead ends: 890 [2022-01-18 06:00:31,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1630 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=512, Invalid=5494, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 06:00:31,264 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 212 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 644 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:00:31,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 496 Invalid, 1908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1211 Invalid, 0 Unknown, 644 Unchecked, 0.5s Time] [2022-01-18 06:00:31,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2022-01-18 06:00:31,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 483. [2022-01-18 06:00:31,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 2.0643153526970957) internal successors, (995), 482 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:31,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 995 transitions. [2022-01-18 06:00:31,271 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 995 transitions. Word has length 33 [2022-01-18 06:00:31,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:00:31,271 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 995 transitions. [2022-01-18 06:00:31,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:31,272 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 995 transitions. [2022-01-18 06:00:31,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:00:31,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:00:31,272 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:00:31,288 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 06:00:31,475 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,SelfDestructingSolverStorable36 [2022-01-18 06:00:31,475 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:00:31,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:00:31,476 INFO L85 PathProgramCache]: Analyzing trace with hash 2104818256, now seen corresponding path program 32 times [2022-01-18 06:00:31,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:00:31,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006288687] [2022-01-18 06:00:31,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:00:31,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:00:31,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:31,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:00:31,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006288687] [2022-01-18 06:00:31,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006288687] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:00:31,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861022789] [2022-01-18 06:00:31,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:00:31,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:31,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:00:31,806 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 06:00:31,808 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 06:00:31,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:00:31,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:00:31,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:00:31,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:00:32,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:00:32,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:00:32,214 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 27 treesize of output 13 [2022-01-18 06:00:32,373 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:32,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:00:32,784 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:00:32,784 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 42 treesize of output 60 [2022-01-18 06:00:32,838 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:32,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861022789] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:00:32,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:00:32,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:00:32,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059760289] [2022-01-18 06:00:32,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:00:32,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:00:32,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:00:32,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:00:32,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:00:32,839 INFO L87 Difference]: Start difference. First operand 483 states and 995 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:34,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:00:34,692 INFO L93 Difference]: Finished difference Result 1240 states and 2502 transitions. [2022-01-18 06:00:34,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 06:00:34,692 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:00:34,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:00:34,696 INFO L225 Difference]: With dead ends: 1240 [2022-01-18 06:00:34,696 INFO L226 Difference]: Without dead ends: 1196 [2022-01-18 06:00:34,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 39 SyntacticMatches, 12 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=579, Invalid=5741, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 06:00:34,697 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 235 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 2383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 796 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:00:34,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 687 Invalid, 2383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1517 Invalid, 0 Unknown, 796 Unchecked, 0.6s Time] [2022-01-18 06:00:34,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2022-01-18 06:00:34,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 484. [2022-01-18 06:00:34,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 2.0641821946169774) internal successors, (997), 483 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:34,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 997 transitions. [2022-01-18 06:00:34,706 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 997 transitions. Word has length 33 [2022-01-18 06:00:34,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:00:34,706 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 997 transitions. [2022-01-18 06:00:34,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:34,706 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 997 transitions. [2022-01-18 06:00:34,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:00:34,707 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:00:34,707 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:00:34,726 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 06:00:34,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:34,923 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:00:34,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:00:34,923 INFO L85 PathProgramCache]: Analyzing trace with hash 688170706, now seen corresponding path program 33 times [2022-01-18 06:00:34,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:00:34,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537339235] [2022-01-18 06:00:34,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:00:34,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:00:34,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:35,205 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:35,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:00:35,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537339235] [2022-01-18 06:00:35,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537339235] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:00:35,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113905113] [2022-01-18 06:00:35,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:00:35,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:35,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:00:35,207 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 06:00:35,208 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 06:00:35,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:00:35,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:00:35,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:00:35,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:00:35,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:00:35,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:00:35,676 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 27 treesize of output 13 [2022-01-18 06:00:35,825 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:35,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:00:36,257 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:00:36,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:00:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:36,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113905113] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:00:36,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:00:36,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:00:36,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771250211] [2022-01-18 06:00:36,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:00:36,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:00:36,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:00:36,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:00:36,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1473, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:00:36,310 INFO L87 Difference]: Start difference. First operand 484 states and 997 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:38,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:00:38,803 INFO L93 Difference]: Finished difference Result 1015 states and 2027 transitions. [2022-01-18 06:00:38,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-18 06:00:38,803 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:00:38,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:00:38,806 INFO L225 Difference]: With dead ends: 1015 [2022-01-18 06:00:38,806 INFO L226 Difference]: Without dead ends: 975 [2022-01-18 06:00:38,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 40 SyntacticMatches, 10 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2820 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=783, Invalid=8529, Unknown=0, NotChecked=0, Total=9312 [2022-01-18 06:00:38,808 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 225 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 2741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1149 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:00:38,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 649 Invalid, 2741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1521 Invalid, 0 Unknown, 1149 Unchecked, 0.7s Time] [2022-01-18 06:00:38,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-01-18 06:00:38,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 485. [2022-01-18 06:00:38,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 2.0640495867768593) internal successors, (999), 484 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:38,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 999 transitions. [2022-01-18 06:00:38,818 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 999 transitions. Word has length 33 [2022-01-18 06:00:38,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:00:38,818 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 999 transitions. [2022-01-18 06:00:38,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:38,818 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 999 transitions. [2022-01-18 06:00:38,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:00:38,819 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:00:38,819 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:00:38,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-18 06:00:39,020 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,SelfDestructingSolverStorable38 [2022-01-18 06:00:39,020 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:00:39,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:00:39,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1079366512, now seen corresponding path program 34 times [2022-01-18 06:00:39,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:00:39,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767997508] [2022-01-18 06:00:39,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:00:39,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:00:39,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:39,325 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:39,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:00:39,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767997508] [2022-01-18 06:00:39,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767997508] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:00:39,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031733240] [2022-01-18 06:00:39,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:00:39,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:39,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:00:39,327 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 06:00:39,328 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 06:00:39,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:00:39,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:00:39,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:00:39,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:00:39,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:00:39,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:00:39,776 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 27 treesize of output 13 [2022-01-18 06:00:39,931 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:39,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:00:40,396 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:00:40,397 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 42 treesize of output 60 [2022-01-18 06:00:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:40,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031733240] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:00:40,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:00:40,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:00:40,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4112803] [2022-01-18 06:00:40,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:00:40,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:00:40,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:00:40,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:00:40,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1473, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:00:40,473 INFO L87 Difference]: Start difference. First operand 485 states and 999 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:42,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:00:42,300 INFO L93 Difference]: Finished difference Result 901 states and 1823 transitions. [2022-01-18 06:00:42,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 06:00:42,300 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:00:42,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:00:42,302 INFO L225 Difference]: With dead ends: 901 [2022-01-18 06:00:42,302 INFO L226 Difference]: Without dead ends: 865 [2022-01-18 06:00:42,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=528, Invalid=5324, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 06:00:42,303 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 148 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 1861 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 2163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:00:42,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 769 Invalid, 2163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1861 Invalid, 0 Unknown, 234 Unchecked, 0.8s Time] [2022-01-18 06:00:42,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-01-18 06:00:42,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 486. [2022-01-18 06:00:42,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.063917525773196) internal successors, (1001), 485 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:42,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1001 transitions. [2022-01-18 06:00:42,314 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1001 transitions. Word has length 33 [2022-01-18 06:00:42,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:00:42,315 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1001 transitions. [2022-01-18 06:00:42,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:42,315 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1001 transitions. [2022-01-18 06:00:42,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:00:42,317 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:00:42,317 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:00:42,341 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 06:00:42,532 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,SelfDestructingSolverStorable39 [2022-01-18 06:00:42,532 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:00:42,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:00:42,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1463707666, now seen corresponding path program 35 times [2022-01-18 06:00:42,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:00:42,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817863589] [2022-01-18 06:00:42,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:00:42,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:00:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:42,788 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:42,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:00:42,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817863589] [2022-01-18 06:00:42,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817863589] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:00:42,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170009827] [2022-01-18 06:00:42,789 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:00:42,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:42,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:00:42,789 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:00:42,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 06:00:42,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:00:42,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:00:42,813 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:00:42,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:00:43,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:00:43,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:00:43,155 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 27 treesize of output 13 [2022-01-18 06:00:43,388 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:43,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:00:44,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:00:44,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:00:44,032 INFO L353 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2022-01-18 06:00:44,032 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 47 treesize of output 55 [2022-01-18 06:00:44,150 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:44,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170009827] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:00:44,150 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:00:44,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 48 [2022-01-18 06:00:44,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087315808] [2022-01-18 06:00:44,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:00:44,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-18 06:00:44,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:00:44,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-18 06:00:44,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2085, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 06:00:44,151 INFO L87 Difference]: Start difference. First operand 486 states and 1001 transitions. Second operand has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:49,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:00:49,129 INFO L93 Difference]: Finished difference Result 1280 states and 2550 transitions. [2022-01-18 06:00:49,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-18 06:00:49,129 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:00:49,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:00:49,131 INFO L225 Difference]: With dead ends: 1280 [2022-01-18 06:00:49,131 INFO L226 Difference]: Without dead ends: 1216 [2022-01-18 06:00:49,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5943 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1883, Invalid=17577, Unknown=0, NotChecked=0, Total=19460 [2022-01-18 06:00:49,133 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 412 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 2154 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 3129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 2154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 821 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:00:49,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 716 Invalid, 3129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 2154 Invalid, 0 Unknown, 821 Unchecked, 0.9s Time] [2022-01-18 06:00:49,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2022-01-18 06:00:49,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 500. [2022-01-18 06:00:49,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 2.0761523046092183) internal successors, (1036), 499 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:49,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1036 transitions. [2022-01-18 06:00:49,141 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1036 transitions. Word has length 33 [2022-01-18 06:00:49,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:00:49,142 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 1036 transitions. [2022-01-18 06:00:49,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:49,142 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1036 transitions. [2022-01-18 06:00:49,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:00:49,142 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:00:49,142 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:00:49,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-18 06:00:49,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:49,364 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:00:49,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:00:49,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1405017264, now seen corresponding path program 36 times [2022-01-18 06:00:49,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:00:49,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181870942] [2022-01-18 06:00:49,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:00:49,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:00:49,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:49,617 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:49,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:00:49,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181870942] [2022-01-18 06:00:49,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181870942] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:00:49,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055234033] [2022-01-18 06:00:49,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:00:49,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:49,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:00:49,619 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:00:49,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 06:00:49,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:00:49,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:00:49,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:00:49,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:00:49,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:00:49,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:00:49,960 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 27 treesize of output 13 [2022-01-18 06:00:50,152 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:50,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:00:50,611 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:00:50,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:00:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:50,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055234033] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:00:50,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:00:50,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:00:50,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142381363] [2022-01-18 06:00:50,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:00:50,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:00:50,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:00:50,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:00:50,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1460, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:00:50,672 INFO L87 Difference]: Start difference. First operand 500 states and 1036 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:54,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:00:54,050 INFO L93 Difference]: Finished difference Result 1137 states and 2293 transitions. [2022-01-18 06:00:54,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-18 06:00:54,051 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:00:54,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:00:54,053 INFO L225 Difference]: With dead ends: 1137 [2022-01-18 06:00:54,053 INFO L226 Difference]: Without dead ends: 1109 [2022-01-18 06:00:54,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 40 SyntacticMatches, 12 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4192 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1412, Invalid=11244, Unknown=0, NotChecked=0, Total=12656 [2022-01-18 06:00:54,054 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 322 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 2796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 850 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:00:54,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 702 Invalid, 2796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1794 Invalid, 0 Unknown, 850 Unchecked, 0.7s Time] [2022-01-18 06:00:54,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2022-01-18 06:00:54,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 493. [2022-01-18 06:00:54,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 2.071138211382114) internal successors, (1019), 492 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:54,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1019 transitions. [2022-01-18 06:00:54,064 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1019 transitions. Word has length 33 [2022-01-18 06:00:54,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:00:54,065 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 1019 transitions. [2022-01-18 06:00:54,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:54,065 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1019 transitions. [2022-01-18 06:00:54,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:00:54,067 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:00:54,067 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:00:54,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-18 06:00:54,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-01-18 06:00:54,284 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:00:54,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:00:54,285 INFO L85 PathProgramCache]: Analyzing trace with hash 996112700, now seen corresponding path program 37 times [2022-01-18 06:00:54,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:00:54,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023099646] [2022-01-18 06:00:54,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:00:54,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:00:54,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:54,593 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:54,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:00:54,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023099646] [2022-01-18 06:00:54,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023099646] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:00:54,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29246025] [2022-01-18 06:00:54,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:00:54,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:54,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:00:54,594 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:00:54,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 06:00:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:54,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:00:54,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:00:55,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:00:55,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:00:55,013 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 27 treesize of output 13 [2022-01-18 06:00:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:55,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:00:55,576 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:00:55,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:00:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:55,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29246025] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:00:55,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:00:55,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:00:55,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985364698] [2022-01-18 06:00:55,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:00:55,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:00:55,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:00:55,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:00:55,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:00:55,640 INFO L87 Difference]: Start difference. First operand 493 states and 1019 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:56,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:00:56,657 INFO L93 Difference]: Finished difference Result 823 states and 1671 transitions. [2022-01-18 06:00:56,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 06:00:56,658 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:00:56,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:00:56,665 INFO L225 Difference]: With dead ends: 823 [2022-01-18 06:00:56,665 INFO L226 Difference]: Without dead ends: 775 [2022-01-18 06:00:56,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=377, Invalid=4045, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 06:00:56,665 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 172 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:00:56,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 501 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1131 Invalid, 0 Unknown, 161 Unchecked, 0.4s Time] [2022-01-18 06:00:56,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-01-18 06:00:56,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 492. [2022-01-18 06:00:56,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 2.069246435845214) internal successors, (1016), 491 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:56,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1016 transitions. [2022-01-18 06:00:56,672 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1016 transitions. Word has length 33 [2022-01-18 06:00:56,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:00:56,672 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 1016 transitions. [2022-01-18 06:00:56,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:56,672 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1016 transitions. [2022-01-18 06:00:56,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:00:56,672 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:00:56,673 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:00:56,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-01-18 06:00:56,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:56,875 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:00:56,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:00:56,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1571949162, now seen corresponding path program 38 times [2022-01-18 06:00:56,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:00:56,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47724988] [2022-01-18 06:00:56,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:00:56,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:00:56,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:57,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:00:57,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47724988] [2022-01-18 06:00:57,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47724988] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:00:57,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625217312] [2022-01-18 06:00:57,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:00:57,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:57,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:00:57,156 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:00:57,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 06:00:57,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:00:57,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:00:57,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:00:57,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:00:57,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:00:57,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:00:57,594 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 27 treesize of output 13 [2022-01-18 06:00:57,753 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:57,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:00:58,212 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:00:58,212 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 42 treesize of output 60 [2022-01-18 06:00:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:58,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625217312] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:00:58,284 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:00:58,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:00:58,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201527376] [2022-01-18 06:00:58,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:00:58,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:00:58,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:00:58,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:00:58,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1475, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:00:58,285 INFO L87 Difference]: Start difference. First operand 492 states and 1016 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:59,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:00:59,864 INFO L93 Difference]: Finished difference Result 809 states and 1637 transitions. [2022-01-18 06:00:59,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 06:00:59,865 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:00:59,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:00:59,866 INFO L225 Difference]: With dead ends: 809 [2022-01-18 06:00:59,866 INFO L226 Difference]: Without dead ends: 759 [2022-01-18 06:00:59,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 39 SyntacticMatches, 12 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=475, Invalid=4927, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 06:00:59,867 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 164 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 541 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:00:59,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 588 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1115 Invalid, 0 Unknown, 541 Unchecked, 0.5s Time] [2022-01-18 06:00:59,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-01-18 06:00:59,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 491. [2022-01-18 06:00:59,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 2.0673469387755103) internal successors, (1013), 490 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:59,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1013 transitions. [2022-01-18 06:00:59,873 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1013 transitions. Word has length 33 [2022-01-18 06:00:59,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:00:59,873 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 1013 transitions. [2022-01-18 06:00:59,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:59,874 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1013 transitions. [2022-01-18 06:00:59,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:00:59,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:00:59,874 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:00:59,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-01-18 06:01:00,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:00,081 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:01:00,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:01:00,081 INFO L85 PathProgramCache]: Analyzing trace with hash -2042732976, now seen corresponding path program 39 times [2022-01-18 06:01:00,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:01:00,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903242107] [2022-01-18 06:01:00,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:01:00,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:01:00,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:01:00,364 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:00,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:01:00,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903242107] [2022-01-18 06:01:00,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903242107] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:01:00,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978483944] [2022-01-18 06:01:00,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:01:00,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:00,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:01:00,365 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:01:00,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 06:01:00,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:01:00,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:01:00,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:01:00,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:01:00,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:01:00,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:01:00,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:01:00,718 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 27 treesize of output 13 [2022-01-18 06:01:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:00,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:01:01,433 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:01:01,433 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 42 treesize of output 60 [2022-01-18 06:01:01,489 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:01,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978483944] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:01:01,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:01:01,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:01:01,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083805282] [2022-01-18 06:01:01,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:01:01,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:01:01,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:01:01,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:01:01,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:01:01,491 INFO L87 Difference]: Start difference. First operand 491 states and 1013 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:03,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:01:03,014 INFO L93 Difference]: Finished difference Result 951 states and 1937 transitions. [2022-01-18 06:01:03,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 06:01:03,014 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:01:03,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:01:03,016 INFO L225 Difference]: With dead ends: 951 [2022-01-18 06:01:03,016 INFO L226 Difference]: Without dead ends: 923 [2022-01-18 06:01:03,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=476, Invalid=4636, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 06:01:03,017 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 157 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 1725 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 2039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:01:03,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 547 Invalid, 2039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1725 Invalid, 0 Unknown, 257 Unchecked, 0.7s Time] [2022-01-18 06:01:03,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2022-01-18 06:01:03,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 494. [2022-01-18 06:01:03,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 2.0649087221095335) internal successors, (1018), 493 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:03,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1018 transitions. [2022-01-18 06:01:03,026 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1018 transitions. Word has length 33 [2022-01-18 06:01:03,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:01:03,026 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 1018 transitions. [2022-01-18 06:01:03,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:03,026 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1018 transitions. [2022-01-18 06:01:03,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:01:03,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:01:03,030 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:01:03,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-18 06:01:03,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-01-18 06:01:03,243 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:01:03,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:01:03,244 INFO L85 PathProgramCache]: Analyzing trace with hash -11051816, now seen corresponding path program 40 times [2022-01-18 06:01:03,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:01:03,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093918325] [2022-01-18 06:01:03,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:01:03,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:01:03,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:01:03,521 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:03,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:01:03,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093918325] [2022-01-18 06:01:03,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093918325] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:01:03,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269468991] [2022-01-18 06:01:03,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:01:03,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:03,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:01:03,522 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:01:03,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 06:01:03,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:01:03,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:01:03,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:01:03,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:01:03,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:01:03,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:01:03,946 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 27 treesize of output 13 [2022-01-18 06:01:04,090 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:04,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:01:04,497 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:01:04,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:01:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:04,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269468991] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:01:04,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:01:04,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:01:04,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015798940] [2022-01-18 06:01:04,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:01:04,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:01:04,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:01:04,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:01:04,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:01:04,571 INFO L87 Difference]: Start difference. First operand 494 states and 1018 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:06,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:01:06,478 INFO L93 Difference]: Finished difference Result 863 states and 1703 transitions. [2022-01-18 06:01:06,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 06:01:06,479 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:01:06,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:01:06,480 INFO L225 Difference]: With dead ends: 863 [2022-01-18 06:01:06,480 INFO L226 Difference]: Without dead ends: 796 [2022-01-18 06:01:06,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 39 SyntacticMatches, 14 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2057 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=541, Invalid=6101, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 06:01:06,481 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 249 mSDsluCounter, 1126 mSDsCounter, 0 mSdLazyCounter, 1611 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 2307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 639 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:01:06,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 682 Invalid, 2307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1611 Invalid, 0 Unknown, 639 Unchecked, 0.6s Time] [2022-01-18 06:01:06,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2022-01-18 06:01:06,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 520. [2022-01-18 06:01:06,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 2.052023121387283) internal successors, (1065), 519 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:06,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1065 transitions. [2022-01-18 06:01:06,488 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1065 transitions. Word has length 33 [2022-01-18 06:01:06,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:01:06,488 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 1065 transitions. [2022-01-18 06:01:06,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:06,488 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1065 transitions. [2022-01-18 06:01:06,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:01:06,488 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:01:06,489 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:01:06,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-01-18 06:01:06,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-18 06:01:06,689 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:01:06,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:01:06,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1816969572, now seen corresponding path program 41 times [2022-01-18 06:01:06,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:01:06,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936781548] [2022-01-18 06:01:06,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:01:06,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:01:06,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:01:06,948 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:06,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:01:06,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936781548] [2022-01-18 06:01:06,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936781548] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:01:06,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753220270] [2022-01-18 06:01:06,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:01:06,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:06,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:01:06,950 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:01:06,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 06:01:06,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 06:01:06,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:01:06,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 06:01:06,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:01:07,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:01:07,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:01:07,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:01:07,344 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 06:01:07,482 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:07,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:01:07,877 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:01:07,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:01:07,929 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:07,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753220270] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:01:07,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:01:07,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:01:07,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159138563] [2022-01-18 06:01:07,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:01:07,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:01:07,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:01:07,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:01:07,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:01:07,930 INFO L87 Difference]: Start difference. First operand 520 states and 1065 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:09,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:01:09,672 INFO L93 Difference]: Finished difference Result 871 states and 1735 transitions. [2022-01-18 06:01:09,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 06:01:09,673 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:01:09,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:01:09,674 INFO L225 Difference]: With dead ends: 871 [2022-01-18 06:01:09,674 INFO L226 Difference]: Without dead ends: 828 [2022-01-18 06:01:09,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 40 SyntacticMatches, 11 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=485, Invalid=5367, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 06:01:09,675 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 202 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 1758 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 2066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:01:09,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 633 Invalid, 2066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1758 Invalid, 0 Unknown, 255 Unchecked, 0.6s Time] [2022-01-18 06:01:09,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-01-18 06:01:09,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 516. [2022-01-18 06:01:09,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 2.0543689320388347) internal successors, (1058), 515 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:09,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1058 transitions. [2022-01-18 06:01:09,682 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1058 transitions. Word has length 33 [2022-01-18 06:01:09,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:01:09,682 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 1058 transitions. [2022-01-18 06:01:09,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:09,682 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1058 transitions. [2022-01-18 06:01:09,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:01:09,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:01:09,683 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:01:09,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-01-18 06:01:09,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-01-18 06:01:09,883 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:01:09,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:01:09,884 INFO L85 PathProgramCache]: Analyzing trace with hash -689184002, now seen corresponding path program 42 times [2022-01-18 06:01:09,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:01:09,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059031811] [2022-01-18 06:01:09,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:01:09,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:01:09,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:01:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:10,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:01:10,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059031811] [2022-01-18 06:01:10,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059031811] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:01:10,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700939092] [2022-01-18 06:01:10,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:01:10,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:10,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:01:10,240 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:01:10,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 06:01:10,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:01:10,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:01:10,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 06:01:10,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:01:10,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:01:10,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:01:10,682 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 27 treesize of output 13 [2022-01-18 06:01:10,850 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:10,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:01:11,324 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:01:11,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:01:11,381 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:11,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700939092] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:01:11,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:01:11,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:01:11,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776223138] [2022-01-18 06:01:11,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:01:11,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:01:11,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:01:11,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:01:11,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:01:11,383 INFO L87 Difference]: Start difference. First operand 516 states and 1058 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:13,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:01:13,072 INFO L93 Difference]: Finished difference Result 859 states and 1715 transitions. [2022-01-18 06:01:13,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 06:01:13,072 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:01:13,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:01:13,073 INFO L225 Difference]: With dead ends: 859 [2022-01-18 06:01:13,073 INFO L226 Difference]: Without dead ends: 824 [2022-01-18 06:01:13,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 38 SyntacticMatches, 13 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1699 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=473, Invalid=5227, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 06:01:13,074 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 205 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 400 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:01:13,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 496 Invalid, 1570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1118 Invalid, 0 Unknown, 400 Unchecked, 0.5s Time] [2022-01-18 06:01:13,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-01-18 06:01:13,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 526. [2022-01-18 06:01:13,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 525 states have (on average 2.041904761904762) internal successors, (1072), 525 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:13,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 1072 transitions. [2022-01-18 06:01:13,081 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 1072 transitions. Word has length 33 [2022-01-18 06:01:13,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:01:13,081 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 1072 transitions. [2022-01-18 06:01:13,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:13,081 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 1072 transitions. [2022-01-18 06:01:13,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:01:13,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:01:13,082 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:01:13,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-01-18 06:01:13,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:13,291 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:01:13,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:01:13,292 INFO L85 PathProgramCache]: Analyzing trace with hash -477014994, now seen corresponding path program 43 times [2022-01-18 06:01:13,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:01:13,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651292195] [2022-01-18 06:01:13,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:01:13,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:01:13,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:01:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:13,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:01:13,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651292195] [2022-01-18 06:01:13,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651292195] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:01:13,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602479404] [2022-01-18 06:01:13,591 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:01:13,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:13,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:01:13,592 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:01:13,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 06:01:13,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:01:13,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:01:13,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:01:14,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:01:14,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:01:14,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 06:01:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:14,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:01:14,607 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:01:14,607 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 42 treesize of output 60 [2022-01-18 06:01:14,659 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:14,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602479404] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:01:14,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:01:14,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:01:14,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925090953] [2022-01-18 06:01:14,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:01:14,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:01:14,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:01:14,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:01:14,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:01:14,660 INFO L87 Difference]: Start difference. First operand 526 states and 1072 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:16,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:01:16,308 INFO L93 Difference]: Finished difference Result 822 states and 1634 transitions. [2022-01-18 06:01:16,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 06:01:16,309 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:01:16,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:01:16,310 INFO L225 Difference]: With dead ends: 822 [2022-01-18 06:01:16,310 INFO L226 Difference]: Without dead ends: 804 [2022-01-18 06:01:16,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 38 SyntacticMatches, 13 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1767 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=489, Invalid=5363, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 06:01:16,311 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 216 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 1311 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 1887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 524 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:01:16,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 553 Invalid, 1887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1311 Invalid, 0 Unknown, 524 Unchecked, 0.5s Time] [2022-01-18 06:01:16,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-01-18 06:01:16,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 516. [2022-01-18 06:01:16,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 2.0543689320388347) internal successors, (1058), 515 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:16,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1058 transitions. [2022-01-18 06:01:16,318 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1058 transitions. Word has length 33 [2022-01-18 06:01:16,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:01:16,318 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 1058 transitions. [2022-01-18 06:01:16,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:16,318 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1058 transitions. [2022-01-18 06:01:16,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:01:16,319 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:01:16,319 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:01:16,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-18 06:01:16,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-01-18 06:01:16,520 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:01:16,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:01:16,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1268319898, now seen corresponding path program 44 times [2022-01-18 06:01:16,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:01:16,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684540892] [2022-01-18 06:01:16,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:01:16,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:01:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:01:16,876 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:16,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:01:16,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684540892] [2022-01-18 06:01:16,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684540892] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:01:16,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734372918] [2022-01-18 06:01:16,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:01:16,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:16,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:01:16,878 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:01:16,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 06:01:16,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:01:16,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:01:16,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:01:16,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:01:17,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:01:17,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:01:17,321 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 27 treesize of output 13 [2022-01-18 06:01:17,473 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:17,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:01:17,920 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:01:17,920 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 42 treesize of output 60 [2022-01-18 06:01:17,969 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:17,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734372918] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:01:17,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:01:17,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:01:17,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482056693] [2022-01-18 06:01:17,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:01:17,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:01:17,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:01:17,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:01:17,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:01:17,970 INFO L87 Difference]: Start difference. First operand 516 states and 1058 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:19,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:01:19,795 INFO L93 Difference]: Finished difference Result 773 states and 1559 transitions. [2022-01-18 06:01:19,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 06:01:19,796 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:01:19,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:01:19,797 INFO L225 Difference]: With dead ends: 773 [2022-01-18 06:01:19,797 INFO L226 Difference]: Without dead ends: 725 [2022-01-18 06:01:19,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 39 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=544, Invalid=5776, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 06:01:19,798 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 183 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 1574 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 1906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:01:19,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 595 Invalid, 1906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1574 Invalid, 0 Unknown, 272 Unchecked, 0.6s Time] [2022-01-18 06:01:19,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-01-18 06:01:19,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 516. [2022-01-18 06:01:19,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 2.0524271844660196) internal successors, (1057), 515 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:19,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1057 transitions. [2022-01-18 06:01:19,804 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1057 transitions. Word has length 33 [2022-01-18 06:01:19,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:01:19,804 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 1057 transitions. [2022-01-18 06:01:19,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:19,804 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1057 transitions. [2022-01-18 06:01:19,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:01:19,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:01:19,805 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:01:19,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 06:01:20,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 06:01:20,019 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:01:20,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:01:20,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1641024808, now seen corresponding path program 45 times [2022-01-18 06:01:20,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:01:20,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579631653] [2022-01-18 06:01:20,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:01:20,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:01:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:01:20,296 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:20,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:01:20,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579631653] [2022-01-18 06:01:20,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579631653] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:01:20,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685791549] [2022-01-18 06:01:20,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:01:20,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:20,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:01:20,298 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:01:20,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 06:01:20,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:01:20,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:01:20,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:01:20,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:01:20,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:01:20,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:01:20,796 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 27 treesize of output 13 [2022-01-18 06:01:20,947 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:20,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:01:21,369 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:01:21,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:01:21,430 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:21,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685791549] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:01:21,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:01:21,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:01:21,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189294267] [2022-01-18 06:01:21,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:01:21,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:01:21,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:01:21,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:01:21,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:01:21,432 INFO L87 Difference]: Start difference. First operand 516 states and 1057 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:23,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:01:23,613 INFO L93 Difference]: Finished difference Result 1126 states and 2249 transitions. [2022-01-18 06:01:23,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-18 06:01:23,613 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:01:23,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:01:23,615 INFO L225 Difference]: With dead ends: 1126 [2022-01-18 06:01:23,615 INFO L226 Difference]: Without dead ends: 1046 [2022-01-18 06:01:23,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 42 SyntacticMatches, 13 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2747 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=763, Invalid=8167, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 06:01:23,625 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 265 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 1297 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 2338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 975 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:01:23,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 621 Invalid, 2338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1297 Invalid, 0 Unknown, 975 Unchecked, 0.5s Time] [2022-01-18 06:01:23,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-01-18 06:01:23,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 520. [2022-01-18 06:01:23,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 2.052023121387283) internal successors, (1065), 519 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:23,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1065 transitions. [2022-01-18 06:01:23,633 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1065 transitions. Word has length 33 [2022-01-18 06:01:23,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:01:23,633 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 1065 transitions. [2022-01-18 06:01:23,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:23,633 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1065 transitions. [2022-01-18 06:01:23,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:01:23,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:01:23,634 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:01:23,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 06:01:23,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:23,835 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:01:23,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:01:23,835 INFO L85 PathProgramCache]: Analyzing trace with hash -855893032, now seen corresponding path program 46 times [2022-01-18 06:01:23,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:01:23,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560200149] [2022-01-18 06:01:23,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:01:23,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:01:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:01:24,158 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:24,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:01:24,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560200149] [2022-01-18 06:01:24,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560200149] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:01:24,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930235906] [2022-01-18 06:01:24,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:01:24,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:24,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:01:24,168 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:01:24,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 06:01:24,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:01:24,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:01:24,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:01:24,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:01:24,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:01:24,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:01:24,597 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 27 treesize of output 13 [2022-01-18 06:01:24,781 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:24,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:01:25,242 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:01:25,242 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 42 treesize of output 60 [2022-01-18 06:01:25,305 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:25,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930235906] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:01:25,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:01:25,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:01:25,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676905966] [2022-01-18 06:01:25,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:01:25,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:01:25,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:01:25,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:01:25,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1457, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:01:25,306 INFO L87 Difference]: Start difference. First operand 520 states and 1065 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:29,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:01:29,088 INFO L93 Difference]: Finished difference Result 1128 states and 2270 transitions. [2022-01-18 06:01:29,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-18 06:01:29,089 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:01:29,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:01:29,091 INFO L225 Difference]: With dead ends: 1128 [2022-01-18 06:01:29,091 INFO L226 Difference]: Without dead ends: 1100 [2022-01-18 06:01:29,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 41 SyntacticMatches, 11 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3475 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1219, Invalid=9911, Unknown=0, NotChecked=0, Total=11130 [2022-01-18 06:01:29,092 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 366 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 2927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1096 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:01:29,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 697 Invalid, 2927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1673 Invalid, 0 Unknown, 1096 Unchecked, 0.7s Time] [2022-01-18 06:01:29,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2022-01-18 06:01:29,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 512. [2022-01-18 06:01:29,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 2.0469667318982387) internal successors, (1046), 511 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:29,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1046 transitions. [2022-01-18 06:01:29,104 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1046 transitions. Word has length 33 [2022-01-18 06:01:29,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:01:29,105 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 1046 transitions. [2022-01-18 06:01:29,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:29,105 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1046 transitions. [2022-01-18 06:01:29,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:01:29,106 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:01:29,106 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:01:29,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-18 06:01:29,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-01-18 06:01:29,319 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:01:29,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:01:29,319 INFO L85 PathProgramCache]: Analyzing trace with hash 161649500, now seen corresponding path program 47 times [2022-01-18 06:01:29,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:01:29,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869006134] [2022-01-18 06:01:29,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:01:29,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:01:29,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:01:29,759 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:29,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:01:29,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869006134] [2022-01-18 06:01:29,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869006134] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:01:29,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574642603] [2022-01-18 06:01:29,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:01:29,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:29,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:01:29,760 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:01:29,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 06:01:29,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:01:29,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:01:29,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 06:01:29,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:01:30,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:01:30,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:01:30,182 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 06:01:30,355 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:30,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:01:30,768 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:01:30,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:01:30,826 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:30,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574642603] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:01:30,827 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:01:30,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:01:30,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913338759] [2022-01-18 06:01:30,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:01:30,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:01:30,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:01:30,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:01:30,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:01:30,828 INFO L87 Difference]: Start difference. First operand 512 states and 1046 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:32,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:01:32,678 INFO L93 Difference]: Finished difference Result 842 states and 1670 transitions. [2022-01-18 06:01:32,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 06:01:32,679 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:01:32,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:01:32,680 INFO L225 Difference]: With dead ends: 842 [2022-01-18 06:01:32,680 INFO L226 Difference]: Without dead ends: 801 [2022-01-18 06:01:32,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 42 SyntacticMatches, 12 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1842 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=497, Invalid=5665, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 06:01:32,681 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 183 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 1550 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 2160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 561 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:01:32,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 697 Invalid, 2160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1550 Invalid, 0 Unknown, 561 Unchecked, 0.6s Time] [2022-01-18 06:01:32,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-01-18 06:01:32,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 501. [2022-01-18 06:01:32,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 2.046) internal successors, (1023), 500 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:32,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1023 transitions. [2022-01-18 06:01:32,687 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1023 transitions. Word has length 33 [2022-01-18 06:01:32,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:01:32,687 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 1023 transitions. [2022-01-18 06:01:32,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:32,688 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1023 transitions. [2022-01-18 06:01:32,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:01:32,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:01:32,688 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:01:32,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-01-18 06:01:32,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:32,895 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:01:32,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:01:32,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1448719524, now seen corresponding path program 48 times [2022-01-18 06:01:32,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:01:32,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816546998] [2022-01-18 06:01:32,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:01:32,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:01:32,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:01:33,177 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:33,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:01:33,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816546998] [2022-01-18 06:01:33,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816546998] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:01:33,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403369670] [2022-01-18 06:01:33,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:01:33,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:33,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:01:33,179 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:01:33,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 06:01:33,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:01:33,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:01:33,206 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:01:33,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:01:33,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:01:33,639 INFO L353 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2022-01-18 06:01:33,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 21 [2022-01-18 06:01:33,932 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:33,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:01:34,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:01:34,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:01:34,674 INFO L353 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2022-01-18 06:01:34,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 55 [2022-01-18 06:01:34,776 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:34,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403369670] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:01:34,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:01:34,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 52 [2022-01-18 06:01:34,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797365864] [2022-01-18 06:01:34,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:01:34,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-18 06:01:34,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:01:34,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-18 06:01:34,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=2437, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 06:01:34,777 INFO L87 Difference]: Start difference. First operand 501 states and 1023 transitions. Second operand has 53 states, 53 states have (on average 1.6603773584905661) internal successors, (88), 52 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:38,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:01:38,611 INFO L93 Difference]: Finished difference Result 876 states and 1742 transitions. [2022-01-18 06:01:38,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-18 06:01:38,611 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.6603773584905661) internal successors, (88), 52 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:01:38,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:01:38,613 INFO L225 Difference]: With dead ends: 876 [2022-01-18 06:01:38,613 INFO L226 Difference]: Without dead ends: 857 [2022-01-18 06:01:38,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3588 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1657, Invalid=12863, Unknown=0, NotChecked=0, Total=14520 [2022-01-18 06:01:38,614 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 360 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 1915 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 2653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 607 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:01:38,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 626 Invalid, 2653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1915 Invalid, 0 Unknown, 607 Unchecked, 0.8s Time] [2022-01-18 06:01:38,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-01-18 06:01:38,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 492. [2022-01-18 06:01:38,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 2.0590631364562118) internal successors, (1011), 491 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:38,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1011 transitions. [2022-01-18 06:01:38,621 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1011 transitions. Word has length 33 [2022-01-18 06:01:38,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:01:38,621 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 1011 transitions. [2022-01-18 06:01:38,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.6603773584905661) internal successors, (88), 52 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:38,621 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1011 transitions. [2022-01-18 06:01:38,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:01:38,622 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:01:38,622 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:01:38,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-01-18 06:01:38,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-01-18 06:01:38,822 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:01:38,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:01:38,823 INFO L85 PathProgramCache]: Analyzing trace with hash -790191306, now seen corresponding path program 49 times [2022-01-18 06:01:38,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:01:38,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662289600] [2022-01-18 06:01:38,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:01:38,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:01:38,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:01:39,118 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:39,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:01:39,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662289600] [2022-01-18 06:01:39,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662289600] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:01:39,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531074705] [2022-01-18 06:01:39,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:01:39,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:39,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:01:39,121 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:01:39,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 06:01:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:01:39,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:01:39,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:01:39,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:01:39,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:01:39,575 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 27 treesize of output 13 [2022-01-18 06:01:39,736 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:39,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:01:40,166 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:01:40,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:01:40,258 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:40,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531074705] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:01:40,259 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:01:40,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:01:40,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257112162] [2022-01-18 06:01:40,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:01:40,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:01:40,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:01:40,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:01:40,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:01:40,260 INFO L87 Difference]: Start difference. First operand 492 states and 1011 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:42,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:01:42,511 INFO L93 Difference]: Finished difference Result 967 states and 1947 transitions. [2022-01-18 06:01:42,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 06:01:42,511 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:01:42,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:01:42,513 INFO L225 Difference]: With dead ends: 967 [2022-01-18 06:01:42,513 INFO L226 Difference]: Without dead ends: 948 [2022-01-18 06:01:42,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 43 SyntacticMatches, 10 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2220 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=690, Invalid=6966, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 06:01:42,513 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 266 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 1985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 727 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:01:42,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 568 Invalid, 1985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1182 Invalid, 0 Unknown, 727 Unchecked, 0.5s Time] [2022-01-18 06:01:42,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2022-01-18 06:01:42,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 519. [2022-01-18 06:01:42,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 2.0463320463320462) internal successors, (1060), 518 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:42,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1060 transitions. [2022-01-18 06:01:42,520 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1060 transitions. Word has length 33 [2022-01-18 06:01:42,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:01:42,520 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 1060 transitions. [2022-01-18 06:01:42,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:42,520 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1060 transitions. [2022-01-18 06:01:42,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:01:42,521 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:01:42,521 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:01:42,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-01-18 06:01:42,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-01-18 06:01:42,735 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:01:42,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:01:42,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1059334192, now seen corresponding path program 50 times [2022-01-18 06:01:42,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:01:42,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114281790] [2022-01-18 06:01:42,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:01:42,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:01:42,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:01:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:43,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:01:43,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114281790] [2022-01-18 06:01:43,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114281790] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:01:43,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578676306] [2022-01-18 06:01:43,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:01:43,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:43,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:01:43,039 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:01:43,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 06:01:43,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:01:43,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:01:43,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:01:43,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:01:43,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:01:43,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:01:43,451 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 27 treesize of output 13 [2022-01-18 06:01:43,602 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:43,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:01:44,045 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:01:44,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:01:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:44,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578676306] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:01:44,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:01:44,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:01:44,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131930867] [2022-01-18 06:01:44,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:01:44,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:01:44,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:01:44,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:01:44,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:01:44,097 INFO L87 Difference]: Start difference. First operand 519 states and 1060 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:46,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:01:46,271 INFO L93 Difference]: Finished difference Result 755 states and 1523 transitions. [2022-01-18 06:01:46,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 06:01:46,271 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:01:46,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:01:46,272 INFO L225 Difference]: With dead ends: 755 [2022-01-18 06:01:46,272 INFO L226 Difference]: Without dead ends: 714 [2022-01-18 06:01:46,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 39 SyntacticMatches, 10 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=613, Invalid=6193, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 06:01:46,273 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 204 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 1735 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 1914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:01:46,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 641 Invalid, 1914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1735 Invalid, 0 Unknown, 108 Unchecked, 0.7s Time] [2022-01-18 06:01:46,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-01-18 06:01:46,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 492. [2022-01-18 06:01:46,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 2.0570264765784114) internal successors, (1010), 491 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:46,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1010 transitions. [2022-01-18 06:01:46,279 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1010 transitions. Word has length 33 [2022-01-18 06:01:46,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:01:46,279 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 1010 transitions. [2022-01-18 06:01:46,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:46,279 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1010 transitions. [2022-01-18 06:01:46,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:01:46,279 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:01:46,279 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:01:46,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-01-18 06:01:46,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:46,480 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:01:46,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:01:46,480 INFO L85 PathProgramCache]: Analyzing trace with hash 2088128440, now seen corresponding path program 51 times [2022-01-18 06:01:46,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:01:46,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157184109] [2022-01-18 06:01:46,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:01:46,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:01:46,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:01:46,762 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:46,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:01:46,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157184109] [2022-01-18 06:01:46,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157184109] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:01:46,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430922579] [2022-01-18 06:01:46,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:01:46,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:46,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:01:46,763 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:01:46,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 06:01:46,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:01:46,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:01:46,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:01:46,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:01:47,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:01:47,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:01:47,224 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 27 treesize of output 13 [2022-01-18 06:01:47,369 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:47,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:01:47,785 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:01:47,785 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 42 treesize of output 60 [2022-01-18 06:01:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:47,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430922579] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:01:47,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:01:47,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:01:47,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579652493] [2022-01-18 06:01:47,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:01:47,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:01:47,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:01:47,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:01:47,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:01:47,870 INFO L87 Difference]: Start difference. First operand 492 states and 1010 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:50,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:01:50,423 INFO L93 Difference]: Finished difference Result 1126 states and 2253 transitions. [2022-01-18 06:01:50,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-18 06:01:50,424 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:01:50,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:01:50,425 INFO L225 Difference]: With dead ends: 1126 [2022-01-18 06:01:50,426 INFO L226 Difference]: Without dead ends: 1050 [2022-01-18 06:01:50,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 43 SyntacticMatches, 10 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2715 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=763, Invalid=8357, Unknown=0, NotChecked=0, Total=9120 [2022-01-18 06:01:50,427 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 284 mSDsluCounter, 1202 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 3024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 873 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:01:50,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 746 Invalid, 3024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2080 Invalid, 0 Unknown, 873 Unchecked, 0.8s Time] [2022-01-18 06:01:50,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2022-01-18 06:01:50,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 486. [2022-01-18 06:01:50,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.051546391752577) internal successors, (995), 485 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:50,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 995 transitions. [2022-01-18 06:01:50,433 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 995 transitions. Word has length 33 [2022-01-18 06:01:50,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:01:50,433 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 995 transitions. [2022-01-18 06:01:50,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:50,433 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 995 transitions. [2022-01-18 06:01:50,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:01:50,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:01:50,434 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:01:50,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-01-18 06:01:50,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:50,635 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:01:50,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:01:50,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1545236932, now seen corresponding path program 52 times [2022-01-18 06:01:50,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:01:50,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348670603] [2022-01-18 06:01:50,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:01:50,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:01:50,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:01:50,937 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:50,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:01:50,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348670603] [2022-01-18 06:01:50,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348670603] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:01:50,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836282054] [2022-01-18 06:01:50,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:01:50,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:50,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:01:50,940 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:01:50,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 06:01:50,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:01:50,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:01:50,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:01:50,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:01:51,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:01:51,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:01:51,410 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 27 treesize of output 13 [2022-01-18 06:01:51,569 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:51,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:01:52,003 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:01:52,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:01:52,069 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:52,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836282054] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:01:52,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:01:52,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:01:52,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637651331] [2022-01-18 06:01:52,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:01:52,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:01:52,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:01:52,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:01:52,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1475, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:01:52,071 INFO L87 Difference]: Start difference. First operand 486 states and 995 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:53,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:01:53,763 INFO L93 Difference]: Finished difference Result 715 states and 1446 transitions. [2022-01-18 06:01:53,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 06:01:53,763 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:01:53,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:01:53,765 INFO L225 Difference]: With dead ends: 715 [2022-01-18 06:01:53,765 INFO L226 Difference]: Without dead ends: 679 [2022-01-18 06:01:53,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=468, Invalid=5082, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 06:01:53,766 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 161 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 1850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 341 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:01:53,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 597 Invalid, 1850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1462 Invalid, 0 Unknown, 341 Unchecked, 0.6s Time] [2022-01-18 06:01:53,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-01-18 06:01:53,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 497. [2022-01-18 06:01:53,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.0463709677419355) internal successors, (1015), 496 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:53,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1015 transitions. [2022-01-18 06:01:53,772 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1015 transitions. Word has length 33 [2022-01-18 06:01:53,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:01:53,772 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 1015 transitions. [2022-01-18 06:01:53,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:53,772 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1015 transitions. [2022-01-18 06:01:53,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:01:53,773 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:01:53,773 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:01:53,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-18 06:01:53,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:53,989 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:01:53,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:01:53,989 INFO L85 PathProgramCache]: Analyzing trace with hash 768850960, now seen corresponding path program 53 times [2022-01-18 06:01:53,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:01:53,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916306046] [2022-01-18 06:01:53,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:01:53,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:01:53,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:01:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:54,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:01:54,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916306046] [2022-01-18 06:01:54,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916306046] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:01:54,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346826614] [2022-01-18 06:01:54,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:01:54,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:54,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:01:54,299 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:01:54,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 06:01:54,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:01:54,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:01:54,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:01:54,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:01:54,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:01:54,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:01:54,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:01:54,766 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 06:01:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:54,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:01:55,540 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:01:55,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 63 [2022-01-18 06:01:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:55,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346826614] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:01:55,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:01:55,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-01-18 06:01:55,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100167660] [2022-01-18 06:01:55,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:01:55,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 06:01:55,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:01:55,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 06:01:55,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 06:01:55,600 INFO L87 Difference]: Start difference. First operand 497 states and 1015 transitions. Second operand has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:57,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:01:57,650 INFO L93 Difference]: Finished difference Result 822 states and 1660 transitions. [2022-01-18 06:01:57,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 06:01:57,650 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:01:57,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:01:57,652 INFO L225 Difference]: With dead ends: 822 [2022-01-18 06:01:57,652 INFO L226 Difference]: Without dead ends: 773 [2022-01-18 06:01:57,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 36 SyntacticMatches, 8 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1796 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=526, Invalid=5954, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 06:01:57,653 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 216 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 1827 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 2363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 468 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:01:57,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 571 Invalid, 2363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1827 Invalid, 0 Unknown, 468 Unchecked, 0.8s Time] [2022-01-18 06:01:57,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-01-18 06:01:57,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 488. [2022-01-18 06:01:57,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 2.051334702258727) internal successors, (999), 487 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:57,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 999 transitions. [2022-01-18 06:01:57,658 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 999 transitions. Word has length 33 [2022-01-18 06:01:57,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:01:57,659 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 999 transitions. [2022-01-18 06:01:57,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:57,659 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 999 transitions. [2022-01-18 06:01:57,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:01:57,659 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:01:57,659 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:01:57,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-01-18 06:01:57,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-01-18 06:01:57,875 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:01:57,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:01:57,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1364107774, now seen corresponding path program 54 times [2022-01-18 06:01:57,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:01:57,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828724753] [2022-01-18 06:01:57,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:01:57,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:01:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:01:58,193 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:58,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:01:58,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828724753] [2022-01-18 06:01:58,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828724753] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:01:58,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495606093] [2022-01-18 06:01:58,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:01:58,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:58,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:01:58,200 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:01:58,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 06:01:58,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:01:58,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:01:58,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:01:58,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:01:58,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:01:58,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:01:58,672 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 27 treesize of output 13 [2022-01-18 06:01:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:58,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:01:59,222 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:01:59,223 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 42 treesize of output 60 [2022-01-18 06:01:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:59,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495606093] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:01:59,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:01:59,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:01:59,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136035833] [2022-01-18 06:01:59,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:01:59,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:01:59,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:01:59,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:01:59,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:01:59,273 INFO L87 Difference]: Start difference. First operand 488 states and 999 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:01,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:02:01,021 INFO L93 Difference]: Finished difference Result 762 states and 1540 transitions. [2022-01-18 06:02:01,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 06:02:01,021 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:02:01,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:02:01,023 INFO L225 Difference]: With dead ends: 762 [2022-01-18 06:02:01,023 INFO L226 Difference]: Without dead ends: 718 [2022-01-18 06:02:01,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=552, Invalid=5610, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 06:02:01,024 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 214 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 1793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 598 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:02:01,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 457 Invalid, 1793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1137 Invalid, 0 Unknown, 598 Unchecked, 0.4s Time] [2022-01-18 06:02:01,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-01-18 06:02:01,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 490. [2022-01-18 06:02:01,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 2.051124744376278) internal successors, (1003), 489 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:01,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1003 transitions. [2022-01-18 06:02:01,037 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1003 transitions. Word has length 33 [2022-01-18 06:02:01,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:02:01,037 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 1003 transitions. [2022-01-18 06:02:01,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:01,037 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1003 transitions. [2022-01-18 06:02:01,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:02:01,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:02:01,038 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:02:01,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-01-18 06:02:01,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-01-18 06:02:01,247 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:02:01,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:02:01,248 INFO L85 PathProgramCache]: Analyzing trace with hash -253325246, now seen corresponding path program 55 times [2022-01-18 06:02:01,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:02:01,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119119062] [2022-01-18 06:02:01,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:02:01,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:02:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:02:01,545 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:01,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:02:01,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119119062] [2022-01-18 06:02:01,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119119062] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:02:01,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964768684] [2022-01-18 06:02:01,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:02:01,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:01,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:02:01,562 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:02:01,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 06:02:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:02:01,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:02:01,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:02:02,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:02:02,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:02:02,089 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 27 treesize of output 13 [2022-01-18 06:02:02,249 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:02,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:02:02,701 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:02:02,701 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 42 treesize of output 60 [2022-01-18 06:02:02,765 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:02,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964768684] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:02:02,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:02:02,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:02:02,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756454107] [2022-01-18 06:02:02,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:02:02,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:02:02,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:02:02,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:02:02,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1466, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:02:02,766 INFO L87 Difference]: Start difference. First operand 490 states and 1003 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:04,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:02:04,760 INFO L93 Difference]: Finished difference Result 867 states and 1755 transitions. [2022-01-18 06:02:04,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 06:02:04,761 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:02:04,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:02:04,762 INFO L225 Difference]: With dead ends: 867 [2022-01-18 06:02:04,762 INFO L226 Difference]: Without dead ends: 831 [2022-01-18 06:02:04,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1679 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=573, Invalid=5747, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 06:02:04,763 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 189 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 2102 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 2487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:02:04,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 586 Invalid, 2487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2102 Invalid, 0 Unknown, 312 Unchecked, 0.8s Time] [2022-01-18 06:02:04,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-01-18 06:02:04,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 491. [2022-01-18 06:02:04,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 2.0510204081632653) internal successors, (1005), 490 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:04,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1005 transitions. [2022-01-18 06:02:04,769 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1005 transitions. Word has length 33 [2022-01-18 06:02:04,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:02:04,769 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 1005 transitions. [2022-01-18 06:02:04,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:04,769 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1005 transitions. [2022-01-18 06:02:04,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:02:04,770 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:02:04,770 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:02:04,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-01-18 06:02:04,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:04,973 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:02:04,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:02:04,974 INFO L85 PathProgramCache]: Analyzing trace with hash -2005218364, now seen corresponding path program 56 times [2022-01-18 06:02:04,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:02:04,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542817298] [2022-01-18 06:02:04,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:02:04,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:02:04,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:02:05,257 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:05,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:02:05,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542817298] [2022-01-18 06:02:05,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542817298] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:02:05,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979519643] [2022-01-18 06:02:05,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:02:05,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:05,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:02:05,259 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:02:05,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 06:02:05,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:02:05,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:02:05,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:02:05,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:02:05,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:02:05,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:02:05,627 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 27 treesize of output 13 [2022-01-18 06:02:05,815 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:05,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:02:06,217 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:02:06,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:02:06,263 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:06,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979519643] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:02:06,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:02:06,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:02:06,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808903732] [2022-01-18 06:02:06,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:02:06,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:02:06,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:02:06,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:02:06,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1452, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:02:06,265 INFO L87 Difference]: Start difference. First operand 491 states and 1005 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:08,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:02:08,120 INFO L93 Difference]: Finished difference Result 1006 states and 2031 transitions. [2022-01-18 06:02:08,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 06:02:08,120 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:02:08,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:02:08,122 INFO L225 Difference]: With dead ends: 1006 [2022-01-18 06:02:08,122 INFO L226 Difference]: Without dead ends: 974 [2022-01-18 06:02:08,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2161 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=726, Invalid=6756, Unknown=0, NotChecked=0, Total=7482 [2022-01-18 06:02:08,123 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 141 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 1387 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 1762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:02:08,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 480 Invalid, 1762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1387 Invalid, 0 Unknown, 310 Unchecked, 0.5s Time] [2022-01-18 06:02:08,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2022-01-18 06:02:08,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 505. [2022-01-18 06:02:08,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.0496031746031744) internal successors, (1033), 504 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:08,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1033 transitions. [2022-01-18 06:02:08,130 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1033 transitions. Word has length 33 [2022-01-18 06:02:08,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:02:08,130 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 1033 transitions. [2022-01-18 06:02:08,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:08,130 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1033 transitions. [2022-01-18 06:02:08,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:02:08,131 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:02:08,131 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:02:08,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-01-18 06:02:08,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:08,347 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:02:08,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:02:08,347 INFO L85 PathProgramCache]: Analyzing trace with hash -578975998, now seen corresponding path program 57 times [2022-01-18 06:02:08,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:02:08,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234522716] [2022-01-18 06:02:08,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:02:08,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:02:08,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:02:08,614 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:08,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:02:08,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234522716] [2022-01-18 06:02:08,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234522716] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:02:08,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100849393] [2022-01-18 06:02:08,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:02:08,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:08,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:02:08,616 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:02:08,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 06:02:08,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:02:08,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:02:08,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:02:08,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:02:09,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:02:09,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:02:09,002 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 27 treesize of output 13 [2022-01-18 06:02:09,185 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:09,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:02:09,612 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:02:09,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:02:09,667 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:09,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100849393] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:02:09,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:02:09,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:02:09,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172328885] [2022-01-18 06:02:09,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:02:09,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:02:09,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:02:09,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:02:09,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:02:09,668 INFO L87 Difference]: Start difference. First operand 505 states and 1033 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:12,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:02:12,735 INFO L93 Difference]: Finished difference Result 1070 states and 2154 transitions. [2022-01-18 06:02:12,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-18 06:02:12,736 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:02:12,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:02:12,737 INFO L225 Difference]: With dead ends: 1070 [2022-01-18 06:02:12,737 INFO L226 Difference]: Without dead ends: 1038 [2022-01-18 06:02:12,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 41 SyntacticMatches, 19 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3671 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1130, Invalid=9790, Unknown=0, NotChecked=0, Total=10920 [2022-01-18 06:02:12,738 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 276 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 1951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:02:12,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 485 Invalid, 1951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1601 Invalid, 0 Unknown, 226 Unchecked, 0.6s Time] [2022-01-18 06:02:12,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2022-01-18 06:02:12,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 487. [2022-01-18 06:02:12,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.051440329218107) internal successors, (997), 486 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:12,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 997 transitions. [2022-01-18 06:02:12,745 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 997 transitions. Word has length 33 [2022-01-18 06:02:12,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:02:12,745 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 997 transitions. [2022-01-18 06:02:12,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:12,745 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 997 transitions. [2022-01-18 06:02:12,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:02:12,745 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:02:12,745 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:02:12,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-01-18 06:02:12,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:12,951 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:02:12,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:02:12,952 INFO L85 PathProgramCache]: Analyzing trace with hash 2121073394, now seen corresponding path program 58 times [2022-01-18 06:02:12,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:02:12,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951879387] [2022-01-18 06:02:12,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:02:12,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:02:12,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:02:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:13,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:02:13,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951879387] [2022-01-18 06:02:13,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951879387] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:02:13,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642044480] [2022-01-18 06:02:13,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:02:13,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:13,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:02:13,320 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:02:13,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 06:02:13,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:02:13,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:02:13,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:02:13,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:02:13,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:02:13,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:02:13,841 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 27 treesize of output 13 [2022-01-18 06:02:13,998 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:13,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:02:14,463 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:02:14,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:02:14,516 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:14,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642044480] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:02:14,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:02:14,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:02:14,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923150907] [2022-01-18 06:02:14,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:02:14,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:02:14,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:02:14,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:02:14,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1474, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:02:14,518 INFO L87 Difference]: Start difference. First operand 487 states and 997 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:16,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:02:16,324 INFO L93 Difference]: Finished difference Result 767 states and 1532 transitions. [2022-01-18 06:02:16,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 06:02:16,324 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:02:16,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:02:16,325 INFO L225 Difference]: With dead ends: 767 [2022-01-18 06:02:16,325 INFO L226 Difference]: Without dead ends: 683 [2022-01-18 06:02:16,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 38 SyntacticMatches, 10 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=506, Invalid=5500, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 06:02:16,326 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 195 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 1740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:02:16,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 500 Invalid, 1740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1473 Invalid, 0 Unknown, 216 Unchecked, 0.6s Time] [2022-01-18 06:02:16,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-01-18 06:02:16,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 491. [2022-01-18 06:02:16,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 2.0510204081632653) internal successors, (1005), 490 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:16,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1005 transitions. [2022-01-18 06:02:16,331 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1005 transitions. Word has length 33 [2022-01-18 06:02:16,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:02:16,331 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 1005 transitions. [2022-01-18 06:02:16,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:16,331 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1005 transitions. [2022-01-18 06:02:16,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:02:16,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:02:16,332 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:02:16,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-01-18 06:02:16,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:16,555 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:02:16,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:02:16,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1479962804, now seen corresponding path program 59 times [2022-01-18 06:02:16,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:02:16,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069482295] [2022-01-18 06:02:16,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:02:16,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:02:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:02:16,877 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:16,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:02:16,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069482295] [2022-01-18 06:02:16,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069482295] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:02:16,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59663491] [2022-01-18 06:02:16,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:02:16,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:16,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:02:16,888 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:02:16,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 06:02:16,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:02:16,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:02:16,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 06:02:16,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:02:17,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:02:17,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:02:17,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:02:17,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:02:17,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 06:02:17,476 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:17,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:02:17,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:02:17,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:02:17,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:02:17,961 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:02:17,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 54 [2022-01-18 06:02:18,050 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:18,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59663491] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:02:18,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:02:18,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 45 [2022-01-18 06:02:18,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266600173] [2022-01-18 06:02:18,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:02:18,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 06:02:18,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:02:18,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 06:02:18,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1822, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 06:02:18,052 INFO L87 Difference]: Start difference. First operand 491 states and 1005 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:23,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:02:23,011 INFO L93 Difference]: Finished difference Result 1473 states and 2923 transitions. [2022-01-18 06:02:23,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-18 06:02:23,011 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:02:23,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:02:23,012 INFO L225 Difference]: With dead ends: 1473 [2022-01-18 06:02:23,012 INFO L226 Difference]: Without dead ends: 1313 [2022-01-18 06:02:23,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6704 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2435, Invalid=19321, Unknown=0, NotChecked=0, Total=21756 [2022-01-18 06:02:23,013 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 404 mSDsluCounter, 1331 mSDsCounter, 0 mSdLazyCounter, 2700 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 3438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 2700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 515 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:02:23,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 818 Invalid, 3438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 2700 Invalid, 0 Unknown, 515 Unchecked, 1.1s Time] [2022-01-18 06:02:23,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2022-01-18 06:02:23,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 511. [2022-01-18 06:02:23,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.052941176470588) internal successors, (1047), 510 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:23,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1047 transitions. [2022-01-18 06:02:23,020 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1047 transitions. Word has length 33 [2022-01-18 06:02:23,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:02:23,020 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 1047 transitions. [2022-01-18 06:02:23,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:23,021 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1047 transitions. [2022-01-18 06:02:23,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:02:23,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:02:23,021 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:02:23,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-01-18 06:02:23,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-01-18 06:02:23,222 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:02:23,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:02:23,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1388762126, now seen corresponding path program 60 times [2022-01-18 06:02:23,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:02:23,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617981739] [2022-01-18 06:02:23,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:02:23,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:02:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:02:23,497 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:23,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:02:23,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617981739] [2022-01-18 06:02:23,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617981739] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:02:23,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228486859] [2022-01-18 06:02:23,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:02:23,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:23,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:02:23,498 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:02:23,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 06:02:23,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:02:23,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:02:23,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 06:02:23,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:02:23,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:02:23,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:02:23,816 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 06:02:23,980 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:23,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:02:24,413 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:02:24,414 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 42 treesize of output 60 [2022-01-18 06:02:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:24,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228486859] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:02:24,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:02:24,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:02:24,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991370381] [2022-01-18 06:02:24,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:02:24,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:02:24,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:02:24,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:02:24,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1448, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:02:24,464 INFO L87 Difference]: Start difference. First operand 511 states and 1047 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:27,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:02:27,277 INFO L93 Difference]: Finished difference Result 1016 states and 2049 transitions. [2022-01-18 06:02:27,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 06:02:27,278 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:02:27,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:02:27,279 INFO L225 Difference]: With dead ends: 1016 [2022-01-18 06:02:27,279 INFO L226 Difference]: Without dead ends: 980 [2022-01-18 06:02:27,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3023 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1071, Invalid=9641, Unknown=0, NotChecked=0, Total=10712 [2022-01-18 06:02:27,280 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 292 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 1723 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 1954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:02:27,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 466 Invalid, 1954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1723 Invalid, 0 Unknown, 97 Unchecked, 0.7s Time] [2022-01-18 06:02:27,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2022-01-18 06:02:27,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 506. [2022-01-18 06:02:27,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.0514851485148515) internal successors, (1036), 505 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:27,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1036 transitions. [2022-01-18 06:02:27,287 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1036 transitions. Word has length 33 [2022-01-18 06:02:27,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:02:27,287 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 1036 transitions. [2022-01-18 06:02:27,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:27,287 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1036 transitions. [2022-01-18 06:02:27,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:02:27,287 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:02:27,288 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:02:27,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-01-18 06:02:27,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:27,488 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:02:27,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:02:27,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1493608744, now seen corresponding path program 61 times [2022-01-18 06:02:27,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:02:27,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186674249] [2022-01-18 06:02:27,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:02:27,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:02:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:02:27,778 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:27,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:02:27,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186674249] [2022-01-18 06:02:27,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186674249] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:02:27,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152456765] [2022-01-18 06:02:27,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:02:27,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:27,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:02:27,779 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:02:27,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 06:02:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:02:27,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:02:27,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:02:28,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:02:28,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:02:28,111 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 27 treesize of output 13 [2022-01-18 06:02:28,301 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:28,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:02:28,757 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:02:28,757 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 42 treesize of output 60 [2022-01-18 06:02:28,805 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:28,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152456765] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:02:28,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:02:28,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:02:28,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145348209] [2022-01-18 06:02:28,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:02:28,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:02:28,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:02:28,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:02:28,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:02:28,806 INFO L87 Difference]: Start difference. First operand 506 states and 1036 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:30,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:02:30,575 INFO L93 Difference]: Finished difference Result 935 states and 1895 transitions. [2022-01-18 06:02:30,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 06:02:30,575 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:02:30,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:02:30,576 INFO L225 Difference]: With dead ends: 935 [2022-01-18 06:02:30,576 INFO L226 Difference]: Without dead ends: 907 [2022-01-18 06:02:30,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=545, Invalid=5461, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 06:02:30,577 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 169 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 2061 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 2475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 350 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:02:30,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 599 Invalid, 2475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2061 Invalid, 0 Unknown, 350 Unchecked, 0.7s Time] [2022-01-18 06:02:30,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-01-18 06:02:30,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 498. [2022-01-18 06:02:30,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 2.052313883299799) internal successors, (1020), 497 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:30,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1020 transitions. [2022-01-18 06:02:30,583 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1020 transitions. Word has length 33 [2022-01-18 06:02:30,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:02:30,583 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 1020 transitions. [2022-01-18 06:02:30,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:30,583 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1020 transitions. [2022-01-18 06:02:30,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:02:30,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:02:30,584 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:02:30,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-01-18 06:02:30,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-01-18 06:02:30,787 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:02:30,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:02:30,787 INFO L85 PathProgramCache]: Analyzing trace with hash 983015062, now seen corresponding path program 62 times [2022-01-18 06:02:30,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:02:30,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211826122] [2022-01-18 06:02:30,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:02:30,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:02:30,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:02:31,139 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:31,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:02:31,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211826122] [2022-01-18 06:02:31,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211826122] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:02:31,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934913166] [2022-01-18 06:02:31,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:02:31,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:31,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:02:31,140 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:02:31,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 06:02:31,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:02:31,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:02:31,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:02:31,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:02:31,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:02:31,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:02:31,585 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 27 treesize of output 13 [2022-01-18 06:02:31,740 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:31,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:02:32,163 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:02:32,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:02:32,212 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:32,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934913166] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:02:32,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:02:32,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:02:32,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210697952] [2022-01-18 06:02:32,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:02:32,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:02:32,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:02:32,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:02:32,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:02:32,213 INFO L87 Difference]: Start difference. First operand 498 states and 1020 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:33,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:02:33,919 INFO L93 Difference]: Finished difference Result 711 states and 1434 transitions. [2022-01-18 06:02:33,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 06:02:33,920 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:02:33,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:02:33,920 INFO L225 Difference]: With dead ends: 711 [2022-01-18 06:02:33,921 INFO L226 Difference]: Without dead ends: 669 [2022-01-18 06:02:33,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1813 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=536, Invalid=5470, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 06:02:33,922 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 182 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1407 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 1641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:02:33,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 482 Invalid, 1641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1407 Invalid, 0 Unknown, 175 Unchecked, 0.5s Time] [2022-01-18 06:02:33,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-01-18 06:02:33,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 505. [2022-01-18 06:02:33,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.0456349206349205) internal successors, (1031), 504 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:33,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1031 transitions. [2022-01-18 06:02:33,927 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1031 transitions. Word has length 33 [2022-01-18 06:02:33,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:02:33,927 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 1031 transitions. [2022-01-18 06:02:33,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:33,927 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1031 transitions. [2022-01-18 06:02:33,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:02:33,928 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:02:33,928 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:02:33,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-01-18 06:02:34,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-01-18 06:02:34,128 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:02:34,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:02:34,129 INFO L85 PathProgramCache]: Analyzing trace with hash 206629090, now seen corresponding path program 63 times [2022-01-18 06:02:34,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:02:34,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387572038] [2022-01-18 06:02:34,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:02:34,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:02:34,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:02:34,417 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:34,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:02:34,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387572038] [2022-01-18 06:02:34,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387572038] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:02:34,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751874618] [2022-01-18 06:02:34,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:02:34,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:34,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:02:34,419 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:02:34,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 06:02:34,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:02:34,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:02:34,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:02:34,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:02:34,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:02:34,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:02:34,866 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 27 treesize of output 13 [2022-01-18 06:02:35,018 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:35,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:02:35,431 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:02:35,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:02:35,481 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:35,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751874618] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:02:35,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:02:35,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:02:35,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141274501] [2022-01-18 06:02:35,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:02:35,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:02:35,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:02:35,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:02:35,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:02:35,482 INFO L87 Difference]: Start difference. First operand 505 states and 1031 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:37,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:02:37,182 INFO L93 Difference]: Finished difference Result 771 states and 1553 transitions. [2022-01-18 06:02:37,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 06:02:37,182 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:02:37,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:02:37,183 INFO L225 Difference]: With dead ends: 771 [2022-01-18 06:02:37,183 INFO L226 Difference]: Without dead ends: 754 [2022-01-18 06:02:37,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 39 SyntacticMatches, 11 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1805 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=539, Invalid=5467, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 06:02:37,184 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 173 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:02:37,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 419 Invalid, 1698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1271 Invalid, 0 Unknown, 363 Unchecked, 0.5s Time] [2022-01-18 06:02:37,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-01-18 06:02:37,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 501. [2022-01-18 06:02:37,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 2.05) internal successors, (1025), 500 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:37,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1025 transitions. [2022-01-18 06:02:37,190 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1025 transitions. Word has length 33 [2022-01-18 06:02:37,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:02:37,190 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 1025 transitions. [2022-01-18 06:02:37,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:37,190 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1025 transitions. [2022-01-18 06:02:37,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:02:37,191 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:02:37,191 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:02:37,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-01-18 06:02:37,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-01-18 06:02:37,407 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:02:37,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:02:37,408 INFO L85 PathProgramCache]: Analyzing trace with hash 690032350, now seen corresponding path program 64 times [2022-01-18 06:02:37,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:02:37,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312349794] [2022-01-18 06:02:37,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:02:37,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:02:37,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:02:37,664 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:37,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:02:37,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312349794] [2022-01-18 06:02:37,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312349794] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:02:37,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083933112] [2022-01-18 06:02:37,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:02:37,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:37,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:02:37,665 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:02:37,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 06:02:37,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:02:37,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:02:37,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:02:37,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:02:38,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:02:38,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:02:38,085 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 27 treesize of output 13 [2022-01-18 06:02:38,221 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:38,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:02:38,634 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:02:38,634 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 42 treesize of output 60 [2022-01-18 06:02:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:38,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083933112] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:02:38,688 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:02:38,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:02:38,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125912625] [2022-01-18 06:02:38,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:02:38,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:02:38,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:02:38,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:02:38,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:02:38,689 INFO L87 Difference]: Start difference. First operand 501 states and 1025 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:40,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:02:40,569 INFO L93 Difference]: Finished difference Result 779 states and 1573 transitions. [2022-01-18 06:02:40,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 06:02:40,569 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:02:40,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:02:40,570 INFO L225 Difference]: With dead ends: 779 [2022-01-18 06:02:40,570 INFO L226 Difference]: Without dead ends: 740 [2022-01-18 06:02:40,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 39 SyntacticMatches, 10 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1771 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=539, Invalid=5467, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 06:02:40,571 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 165 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 1900 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 2260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:02:40,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 619 Invalid, 2260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1900 Invalid, 0 Unknown, 299 Unchecked, 0.7s Time] [2022-01-18 06:02:40,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-01-18 06:02:40,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 499. [2022-01-18 06:02:40,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.0522088353413657) internal successors, (1022), 498 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:40,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1022 transitions. [2022-01-18 06:02:40,577 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1022 transitions. Word has length 33 [2022-01-18 06:02:40,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:02:40,577 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 1022 transitions. [2022-01-18 06:02:40,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:40,577 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1022 transitions. [2022-01-18 06:02:40,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:02:40,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:02:40,578 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:02:40,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-01-18 06:02:40,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-01-18 06:02:40,778 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:02:40,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:02:40,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1926329644, now seen corresponding path program 65 times [2022-01-18 06:02:40,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:02:40,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228434173] [2022-01-18 06:02:40,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:02:40,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:02:40,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:02:41,032 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:41,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:02:41,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228434173] [2022-01-18 06:02:41,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228434173] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:02:41,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201850096] [2022-01-18 06:02:41,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:02:41,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:41,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:02:41,033 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:02:41,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 06:02:41,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:02:41,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:02:41,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 06:02:41,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:02:41,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:02:41,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:02:41,421 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 06:02:41,555 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:41,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:02:41,980 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:02:41,981 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 42 treesize of output 60 [2022-01-18 06:02:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:42,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201850096] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:02:42,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:02:42,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:02:42,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034893954] [2022-01-18 06:02:42,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:02:42,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:02:42,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:02:42,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:02:42,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:02:42,040 INFO L87 Difference]: Start difference. First operand 499 states and 1022 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:43,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:02:43,963 INFO L93 Difference]: Finished difference Result 688 states and 1386 transitions. [2022-01-18 06:02:43,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 06:02:43,963 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:02:43,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:02:43,964 INFO L225 Difference]: With dead ends: 688 [2022-01-18 06:02:43,964 INFO L226 Difference]: Without dead ends: 644 [2022-01-18 06:02:43,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 37 SyntacticMatches, 10 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1855 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=569, Invalid=5751, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 06:02:43,965 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 177 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 1427 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 290 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:02:43,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 511 Invalid, 1790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1427 Invalid, 0 Unknown, 290 Unchecked, 0.5s Time] [2022-01-18 06:02:43,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2022-01-18 06:02:43,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 500. [2022-01-18 06:02:43,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 2.0521042084168335) internal successors, (1024), 499 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:43,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1024 transitions. [2022-01-18 06:02:43,970 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1024 transitions. Word has length 33 [2022-01-18 06:02:43,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:02:43,970 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 1024 transitions. [2022-01-18 06:02:43,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:43,971 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1024 transitions. [2022-01-18 06:02:43,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:02:43,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:02:43,971 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:02:43,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-01-18 06:02:44,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:44,172 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:02:44,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:02:44,172 INFO L85 PathProgramCache]: Analyzing trace with hash 951990102, now seen corresponding path program 66 times [2022-01-18 06:02:44,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:02:44,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608695756] [2022-01-18 06:02:44,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:02:44,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:02:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:02:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:44,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:02:44,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608695756] [2022-01-18 06:02:44,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608695756] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:02:44,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738220097] [2022-01-18 06:02:44,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:02:44,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:44,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:02:44,437 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:02:44,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 06:02:44,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:02:44,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:02:44,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:02:44,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:02:44,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:02:44,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:02:44,983 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 06:02:45,123 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:45,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:02:45,631 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:02:45,631 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 47 treesize of output 63 [2022-01-18 06:02:45,676 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:45,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738220097] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:02:45,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:02:45,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-01-18 06:02:45,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829637963] [2022-01-18 06:02:45,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:02:45,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 06:02:45,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:02:45,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 06:02:45,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1766, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 06:02:45,678 INFO L87 Difference]: Start difference. First operand 500 states and 1024 transitions. Second operand has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:47,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:02:47,722 INFO L93 Difference]: Finished difference Result 957 states and 1927 transitions. [2022-01-18 06:02:47,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 06:02:47,722 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:02:47,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:02:47,724 INFO L225 Difference]: With dead ends: 957 [2022-01-18 06:02:47,724 INFO L226 Difference]: Without dead ends: 916 [2022-01-18 06:02:47,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=619, Invalid=5701, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 06:02:47,724 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 228 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 1997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 512 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:02:47,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 504 Invalid, 1997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1392 Invalid, 0 Unknown, 512 Unchecked, 0.6s Time] [2022-01-18 06:02:47,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-01-18 06:02:47,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 502. [2022-01-18 06:02:47,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 2.0518962075848304) internal successors, (1028), 501 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:47,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1028 transitions. [2022-01-18 06:02:47,730 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1028 transitions. Word has length 33 [2022-01-18 06:02:47,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:02:47,730 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 1028 transitions. [2022-01-18 06:02:47,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:47,730 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1028 transitions. [2022-01-18 06:02:47,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:02:47,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:02:47,731 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:02:47,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-01-18 06:02:47,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:47,942 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:02:47,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:02:47,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1727527062, now seen corresponding path program 67 times [2022-01-18 06:02:47,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:02:47,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251410103] [2022-01-18 06:02:47,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:02:47,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:02:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:02:48,206 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:48,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:02:48,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251410103] [2022-01-18 06:02:48,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251410103] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:02:48,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030572843] [2022-01-18 06:02:48,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:02:48,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:48,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:02:48,208 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:02:48,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 06:02:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:02:48,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:02:48,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:02:48,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:02:48,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:02:48,523 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 27 treesize of output 13 [2022-01-18 06:02:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:48,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:02:49,158 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:02:49,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:02:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:49,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030572843] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:02:49,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:02:49,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:02:49,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193161070] [2022-01-18 06:02:49,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:02:49,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:02:49,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:02:49,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:02:49,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1450, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:02:49,214 INFO L87 Difference]: Start difference. First operand 502 states and 1028 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:51,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:02:51,797 INFO L93 Difference]: Finished difference Result 908 states and 1836 transitions. [2022-01-18 06:02:51,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 06:02:51,798 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:02:51,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:02:51,799 INFO L225 Difference]: With dead ends: 908 [2022-01-18 06:02:51,799 INFO L226 Difference]: Without dead ends: 876 [2022-01-18 06:02:51,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2647 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=887, Invalid=7855, Unknown=0, NotChecked=0, Total=8742 [2022-01-18 06:02:51,800 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 240 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1829 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 2440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 480 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:02:51,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 499 Invalid, 2440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1829 Invalid, 0 Unknown, 480 Unchecked, 0.7s Time] [2022-01-18 06:02:51,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-01-18 06:02:51,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 500. [2022-01-18 06:02:51,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 2.0521042084168335) internal successors, (1024), 499 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:51,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1024 transitions. [2022-01-18 06:02:51,806 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1024 transitions. Word has length 33 [2022-01-18 06:02:51,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:02:51,806 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 1024 transitions. [2022-01-18 06:02:51,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:51,806 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1024 transitions. [2022-01-18 06:02:51,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:02:51,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:02:51,806 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:02:51,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-01-18 06:02:52,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:52,008 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:02:52,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:02:52,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1141197868, now seen corresponding path program 68 times [2022-01-18 06:02:52,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:02:52,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805823800] [2022-01-18 06:02:52,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:02:52,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:02:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:02:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:52,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:02:52,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805823800] [2022-01-18 06:02:52,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805823800] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:02:52,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641334577] [2022-01-18 06:02:52,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:02:52,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:52,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:02:52,286 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:02:52,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 06:02:52,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:02:52,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:02:52,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:02:52,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:02:52,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:02:52,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:02:52,628 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 27 treesize of output 13 [2022-01-18 06:02:52,792 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:52,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:02:53,215 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:02:53,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:02:53,260 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:53,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641334577] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:02:53,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:02:53,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:02:53,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979587015] [2022-01-18 06:02:53,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:02:53,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:02:53,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:02:53,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:02:53,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1445, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:02:53,261 INFO L87 Difference]: Start difference. First operand 500 states and 1024 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:57,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:02:57,067 INFO L93 Difference]: Finished difference Result 1088 states and 2173 transitions. [2022-01-18 06:02:57,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-18 06:02:57,067 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:02:57,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:02:57,069 INFO L225 Difference]: With dead ends: 1088 [2022-01-18 06:02:57,069 INFO L226 Difference]: Without dead ends: 995 [2022-01-18 06:02:57,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 39 SyntacticMatches, 11 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4619 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1466, Invalid=12814, Unknown=0, NotChecked=0, Total=14280 [2022-01-18 06:02:57,070 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 386 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 2293 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 3015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 2293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 518 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:02:57,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 579 Invalid, 3015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 2293 Invalid, 0 Unknown, 518 Unchecked, 0.8s Time] [2022-01-18 06:02:57,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-01-18 06:02:57,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 504. [2022-01-18 06:02:57,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 2.0536779324055665) internal successors, (1033), 503 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:57,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1033 transitions. [2022-01-18 06:02:57,076 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1033 transitions. Word has length 33 [2022-01-18 06:02:57,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:02:57,076 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 1033 transitions. [2022-01-18 06:02:57,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:57,076 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1033 transitions. [2022-01-18 06:02:57,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:02:57,077 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:02:57,077 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:02:57,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-01-18 06:02:57,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-01-18 06:02:57,291 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:02:57,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:02:57,292 INFO L85 PathProgramCache]: Analyzing trace with hash 142203974, now seen corresponding path program 69 times [2022-01-18 06:02:57,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:02:57,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948406581] [2022-01-18 06:02:57,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:02:57,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:02:57,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:02:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:57,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:02:57,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948406581] [2022-01-18 06:02:57,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948406581] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:02:57,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833862202] [2022-01-18 06:02:57,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:02:57,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:57,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:02:57,545 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:02:57,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 06:02:57,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:02:57,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:02:57,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:02:57,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:02:57,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:02:57,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:02:57,952 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 27 treesize of output 13 [2022-01-18 06:02:58,089 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:58,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:02:58,498 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:02:58,498 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 42 treesize of output 60 [2022-01-18 06:02:58,572 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:58,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833862202] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:02:58,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:02:58,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:02:58,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313458262] [2022-01-18 06:02:58,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:02:58,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:02:58,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:02:58,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:02:58,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:02:58,584 INFO L87 Difference]: Start difference. First operand 504 states and 1033 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:00,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:03:00,551 INFO L93 Difference]: Finished difference Result 932 states and 1863 transitions. [2022-01-18 06:03:00,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 06:03:00,551 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:03:00,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:03:00,552 INFO L225 Difference]: With dead ends: 932 [2022-01-18 06:03:00,552 INFO L226 Difference]: Without dead ends: 853 [2022-01-18 06:03:00,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 40 SyntacticMatches, 10 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2130 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=654, Invalid=6656, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 06:03:00,553 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 224 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 1894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 340 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:03:00,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 470 Invalid, 1894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1483 Invalid, 0 Unknown, 340 Unchecked, 0.6s Time] [2022-01-18 06:03:00,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-01-18 06:03:00,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 517. [2022-01-18 06:03:00,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 2.0426356589147288) internal successors, (1054), 516 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:00,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1054 transitions. [2022-01-18 06:03:00,559 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1054 transitions. Word has length 33 [2022-01-18 06:03:00,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:03:00,559 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 1054 transitions. [2022-01-18 06:03:00,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:00,559 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1054 transitions. [2022-01-18 06:03:00,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:03:00,560 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:03:00,560 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:03:00,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-01-18 06:03:00,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:00,760 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:03:00,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:03:00,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1348678666, now seen corresponding path program 70 times [2022-01-18 06:03:00,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:03:00,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746280683] [2022-01-18 06:03:00,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:03:00,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:03:00,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:03:01,021 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:01,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:03:01,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746280683] [2022-01-18 06:03:01,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746280683] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:03:01,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62738576] [2022-01-18 06:03:01,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:03:01,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:01,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:03:01,023 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:03:01,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 06:03:01,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:03:01,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:03:01,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:03:01,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:03:01,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:03:01,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:03:01,414 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 27 treesize of output 13 [2022-01-18 06:03:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:01,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:03:01,995 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:03:01,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:03:02,076 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:02,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62738576] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:03:02,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:03:02,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:03:02,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755069637] [2022-01-18 06:03:02,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:03:02,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:03:02,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:03:02,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:03:02,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:03:02,077 INFO L87 Difference]: Start difference. First operand 517 states and 1054 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:03,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:03:03,740 INFO L93 Difference]: Finished difference Result 913 states and 1843 transitions. [2022-01-18 06:03:03,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 06:03:03,740 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:03:03,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:03:03,741 INFO L225 Difference]: With dead ends: 913 [2022-01-18 06:03:03,741 INFO L226 Difference]: Without dead ends: 876 [2022-01-18 06:03:03,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=552, Invalid=5454, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 06:03:03,742 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 192 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 1291 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:03:03,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 326 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1291 Invalid, 0 Unknown, 11 Unchecked, 0.5s Time] [2022-01-18 06:03:03,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-01-18 06:03:03,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 508. [2022-01-18 06:03:03,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 2.04930966469428) internal successors, (1039), 507 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:03,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1039 transitions. [2022-01-18 06:03:03,748 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1039 transitions. Word has length 33 [2022-01-18 06:03:03,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:03:03,748 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 1039 transitions. [2022-01-18 06:03:03,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:03,748 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1039 transitions. [2022-01-18 06:03:03,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:03:03,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:03:03,748 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:03:03,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-01-18 06:03:03,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:03,949 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:03:03,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:03:03,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1950983996, now seen corresponding path program 71 times [2022-01-18 06:03:03,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:03:03,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623789243] [2022-01-18 06:03:03,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:03:03,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:03:03,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:03:04,213 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:04,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:03:04,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623789243] [2022-01-18 06:03:04,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623789243] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:03:04,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855715490] [2022-01-18 06:03:04,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:03:04,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:04,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:03:04,214 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:03:04,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 06:03:04,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:03:04,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:03:04,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 06:03:04,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:03:04,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:03:04,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:03:04,566 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 06:03:04,749 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:04,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:03:05,174 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:03:05,175 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 42 treesize of output 60 [2022-01-18 06:03:05,236 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:05,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855715490] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:03:05,236 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:03:05,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:03:05,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348307877] [2022-01-18 06:03:05,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:03:05,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:03:05,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:03:05,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:03:05,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1446, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:03:05,237 INFO L87 Difference]: Start difference. First operand 508 states and 1039 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:08,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:03:08,045 INFO L93 Difference]: Finished difference Result 903 states and 1824 transitions. [2022-01-18 06:03:08,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 06:03:08,045 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:03:08,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:03:08,046 INFO L225 Difference]: With dead ends: 903 [2022-01-18 06:03:08,047 INFO L226 Difference]: Without dead ends: 871 [2022-01-18 06:03:08,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 40 SyntacticMatches, 12 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2672 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=896, Invalid=7846, Unknown=0, NotChecked=0, Total=8742 [2022-01-18 06:03:08,048 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 270 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1848 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 2063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:03:08,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 392 Invalid, 2063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1848 Invalid, 0 Unknown, 64 Unchecked, 0.8s Time] [2022-01-18 06:03:08,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-01-18 06:03:08,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 497. [2022-01-18 06:03:08,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.0483870967741935) internal successors, (1016), 496 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:08,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1016 transitions. [2022-01-18 06:03:08,054 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1016 transitions. Word has length 33 [2022-01-18 06:03:08,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:03:08,054 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 1016 transitions. [2022-01-18 06:03:08,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:08,054 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1016 transitions. [2022-01-18 06:03:08,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:03:08,055 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:03:08,055 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:03:08,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-01-18 06:03:08,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-01-18 06:03:08,255 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:03:08,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:03:08,256 INFO L85 PathProgramCache]: Analyzing trace with hash -222286980, now seen corresponding path program 72 times [2022-01-18 06:03:08,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:03:08,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467307984] [2022-01-18 06:03:08,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:03:08,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:03:08,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:03:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:08,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:03:08,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467307984] [2022-01-18 06:03:08,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467307984] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:03:08,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765723872] [2022-01-18 06:03:08,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:03:08,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:08,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:03:08,534 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:03:08,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 06:03:08,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:03:08,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:03:08,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 06:03:08,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:03:08,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:03:08,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:03:08,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:03:08,859 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 06:03:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:09,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:03:09,477 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:03:09,477 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 42 treesize of output 60 [2022-01-18 06:03:09,523 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:09,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765723872] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:03:09,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:03:09,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:03:09,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861098800] [2022-01-18 06:03:09,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:03:09,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:03:09,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:03:09,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:03:09,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1463, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:03:09,524 INFO L87 Difference]: Start difference. First operand 497 states and 1016 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:11,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:03:11,391 INFO L93 Difference]: Finished difference Result 831 states and 1671 transitions. [2022-01-18 06:03:11,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 06:03:11,391 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:03:11,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:03:11,393 INFO L225 Difference]: With dead ends: 831 [2022-01-18 06:03:11,393 INFO L226 Difference]: Without dead ends: 799 [2022-01-18 06:03:11,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=637, Invalid=5843, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 06:03:11,394 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 179 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:03:11,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 396 Invalid, 1838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1654 Invalid, 0 Unknown, 95 Unchecked, 0.6s Time] [2022-01-18 06:03:11,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-01-18 06:03:11,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 499. [2022-01-18 06:03:11,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.0481927710843375) internal successors, (1020), 498 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:11,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1020 transitions. [2022-01-18 06:03:11,400 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1020 transitions. Word has length 33 [2022-01-18 06:03:11,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:03:11,400 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 1020 transitions. [2022-01-18 06:03:11,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:11,400 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1020 transitions. [2022-01-18 06:03:11,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:03:11,401 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:03:11,401 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:03:11,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-01-18 06:03:11,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-01-18 06:03:11,601 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:03:11,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:03:11,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1203955386, now seen corresponding path program 73 times [2022-01-18 06:03:11,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:03:11,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514106729] [2022-01-18 06:03:11,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:03:11,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:03:11,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:03:11,862 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:11,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:03:11,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514106729] [2022-01-18 06:03:11,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514106729] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:03:11,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411585728] [2022-01-18 06:03:11,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:03:11,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:11,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:03:11,863 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:03:11,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 06:03:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:03:11,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:03:11,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:03:12,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:03:12,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:03:12,164 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 27 treesize of output 13 [2022-01-18 06:03:12,361 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:12,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:03:12,795 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:03:12,795 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 42 treesize of output 60 [2022-01-18 06:03:12,844 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:12,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411585728] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:03:12,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:03:12,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:03:12,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816920892] [2022-01-18 06:03:12,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:03:12,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:03:12,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:03:12,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:03:12,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:03:12,845 INFO L87 Difference]: Start difference. First operand 499 states and 1020 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:15,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:03:15,632 INFO L93 Difference]: Finished difference Result 823 states and 1654 transitions. [2022-01-18 06:03:15,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 06:03:15,632 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:03:15,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:03:15,633 INFO L225 Difference]: With dead ends: 823 [2022-01-18 06:03:15,633 INFO L226 Difference]: Without dead ends: 795 [2022-01-18 06:03:15,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2358 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=864, Invalid=7692, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 06:03:15,634 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 196 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 2140 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 2320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:03:15,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 437 Invalid, 2320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2140 Invalid, 0 Unknown, 81 Unchecked, 0.9s Time] [2022-01-18 06:03:15,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-01-18 06:03:15,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 494. [2022-01-18 06:03:15,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 2.04868154158215) internal successors, (1010), 493 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:15,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1010 transitions. [2022-01-18 06:03:15,640 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1010 transitions. Word has length 33 [2022-01-18 06:03:15,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:03:15,640 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 1010 transitions. [2022-01-18 06:03:15,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:15,640 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1010 transitions. [2022-01-18 06:03:15,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:03:15,641 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:03:15,641 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:03:15,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-01-18 06:03:15,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:15,855 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:03:15,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:03:15,856 INFO L85 PathProgramCache]: Analyzing trace with hash -2055830614, now seen corresponding path program 74 times [2022-01-18 06:03:15,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:03:15,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086457440] [2022-01-18 06:03:15,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:03:15,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:03:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:03:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:16,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:03:16,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086457440] [2022-01-18 06:03:16,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086457440] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:03:16,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421148601] [2022-01-18 06:03:16,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:03:16,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:16,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:03:16,139 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:03:16,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 06:03:16,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:03:16,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:03:16,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 06:03:16,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:03:16,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:03:16,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:03:16,434 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 27 treesize of output 13 [2022-01-18 06:03:16,621 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:16,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:03:17,114 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:03:17,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:03:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:17,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421148601] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:03:17,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:03:17,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:03:17,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539183754] [2022-01-18 06:03:17,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:03:17,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:03:17,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:03:17,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:03:17,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:03:17,177 INFO L87 Difference]: Start difference. First operand 494 states and 1010 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:20,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:03:20,029 INFO L93 Difference]: Finished difference Result 770 states and 1541 transitions. [2022-01-18 06:03:20,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 06:03:20,030 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:03:20,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:03:20,031 INFO L225 Difference]: With dead ends: 770 [2022-01-18 06:03:20,031 INFO L226 Difference]: Without dead ends: 721 [2022-01-18 06:03:20,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2098 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=803, Invalid=7387, Unknown=0, NotChecked=0, Total=8190 [2022-01-18 06:03:20,032 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 183 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 2579 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 2836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 2579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:03:20,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 613 Invalid, 2836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 2579 Invalid, 0 Unknown, 162 Unchecked, 1.1s Time] [2022-01-18 06:03:20,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-01-18 06:03:20,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 489. [2022-01-18 06:03:20,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.0512295081967213) internal successors, (1001), 488 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:20,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1001 transitions. [2022-01-18 06:03:20,037 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1001 transitions. Word has length 33 [2022-01-18 06:03:20,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:03:20,037 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 1001 transitions. [2022-01-18 06:03:20,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:20,037 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1001 transitions. [2022-01-18 06:03:20,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:03:20,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:03:20,038 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:03:20,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-01-18 06:03:20,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:20,254 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:03:20,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:03:20,254 INFO L85 PathProgramCache]: Analyzing trace with hash -246578804, now seen corresponding path program 75 times [2022-01-18 06:03:20,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:03:20,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933968604] [2022-01-18 06:03:20,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:03:20,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:03:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:03:20,528 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:20,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:03:20,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933968604] [2022-01-18 06:03:20,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933968604] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:03:20,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099601080] [2022-01-18 06:03:20,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:03:20,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:20,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:03:20,530 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:03:20,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 06:03:20,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 06:03:20,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:03:20,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:03:20,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:03:20,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:03:20,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:03:20,926 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 27 treesize of output 13 [2022-01-18 06:03:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:21,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:03:21,495 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:03:21,495 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 42 treesize of output 60 [2022-01-18 06:03:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:21,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099601080] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:03:21,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:03:21,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:03:21,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153555318] [2022-01-18 06:03:21,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:03:21,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:03:21,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:03:21,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:03:21,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:03:21,568 INFO L87 Difference]: Start difference. First operand 489 states and 1001 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:23,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:03:23,189 INFO L93 Difference]: Finished difference Result 876 states and 1750 transitions. [2022-01-18 06:03:23,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 06:03:23,189 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:03:23,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:03:23,190 INFO L225 Difference]: With dead ends: 876 [2022-01-18 06:03:23,190 INFO L226 Difference]: Without dead ends: 828 [2022-01-18 06:03:23,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 40 SyntacticMatches, 13 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1879 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=493, Invalid=5669, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 06:03:23,191 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 217 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 1736 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 2460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 670 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:03:23,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 635 Invalid, 2460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1736 Invalid, 0 Unknown, 670 Unchecked, 0.6s Time] [2022-01-18 06:03:23,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-01-18 06:03:23,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 501. [2022-01-18 06:03:23,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 2.056) internal successors, (1028), 500 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:23,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1028 transitions. [2022-01-18 06:03:23,197 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1028 transitions. Word has length 33 [2022-01-18 06:03:23,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:03:23,197 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 1028 transitions. [2022-01-18 06:03:23,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:23,197 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1028 transitions. [2022-01-18 06:03:23,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:03:23,198 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:03:23,198 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:03:23,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-01-18 06:03:23,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:23,398 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:03:23,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:03:23,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1231585484, now seen corresponding path program 76 times [2022-01-18 06:03:23,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:03:23,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598390846] [2022-01-18 06:03:23,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:03:23,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:03:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:03:23,654 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:23,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:03:23,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598390846] [2022-01-18 06:03:23,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598390846] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:03:23,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604054660] [2022-01-18 06:03:23,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:03:23,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:23,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:03:23,656 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:03:23,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-18 06:03:23,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:03:23,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:03:23,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:03:23,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:03:24,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:03:24,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:03:24,056 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 27 treesize of output 13 [2022-01-18 06:03:24,198 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:24,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:03:24,645 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:03:24,645 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 42 treesize of output 60 [2022-01-18 06:03:24,708 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:24,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604054660] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:03:24,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:03:24,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:03:24,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60319041] [2022-01-18 06:03:24,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:03:24,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:03:24,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:03:24,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:03:24,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:03:24,709 INFO L87 Difference]: Start difference. First operand 501 states and 1028 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:26,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:03:26,222 INFO L93 Difference]: Finished difference Result 885 states and 1753 transitions. [2022-01-18 06:03:26,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 06:03:26,222 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:03:26,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:03:26,223 INFO L225 Difference]: With dead ends: 885 [2022-01-18 06:03:26,223 INFO L226 Difference]: Without dead ends: 837 [2022-01-18 06:03:26,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 39 SyntacticMatches, 13 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=508, Invalid=5812, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 06:03:26,224 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 204 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 1662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 396 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:03:26,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 493 Invalid, 1662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1212 Invalid, 0 Unknown, 396 Unchecked, 0.5s Time] [2022-01-18 06:03:26,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-01-18 06:03:26,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 501. [2022-01-18 06:03:26,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 2.056) internal successors, (1028), 500 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:26,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1028 transitions. [2022-01-18 06:03:26,230 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1028 transitions. Word has length 33 [2022-01-18 06:03:26,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:03:26,230 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 1028 transitions. [2022-01-18 06:03:26,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:26,230 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1028 transitions. [2022-01-18 06:03:26,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:03:26,231 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:03:26,231 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:03:26,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-01-18 06:03:26,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:26,431 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:03:26,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:03:26,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1032792910, now seen corresponding path program 77 times [2022-01-18 06:03:26,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:03:26,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242202908] [2022-01-18 06:03:26,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:03:26,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:03:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:03:26,681 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:26,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:03:26,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242202908] [2022-01-18 06:03:26,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242202908] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:03:26,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158350338] [2022-01-18 06:03:26,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:03:26,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:26,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:03:26,683 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:03:26,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-18 06:03:26,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:03:26,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:03:26,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:03:26,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:03:27,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:03:27,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:03:27,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:03:27,090 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 06:03:27,255 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:27,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:03:27,785 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:03:27,786 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 49 treesize of output 63 [2022-01-18 06:03:27,837 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:27,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158350338] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:03:27,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:03:27,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-01-18 06:03:27,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093609852] [2022-01-18 06:03:27,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:03:27,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 06:03:27,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:03:27,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 06:03:27,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1792, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 06:03:27,839 INFO L87 Difference]: Start difference. First operand 501 states and 1028 transitions. Second operand has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:30,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:03:30,130 INFO L93 Difference]: Finished difference Result 868 states and 1755 transitions. [2022-01-18 06:03:30,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 06:03:30,131 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:03:30,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:03:30,133 INFO L225 Difference]: With dead ends: 868 [2022-01-18 06:03:30,133 INFO L226 Difference]: Without dead ends: 820 [2022-01-18 06:03:30,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 37 SyntacticMatches, 10 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2223 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=569, Invalid=6913, Unknown=0, NotChecked=0, Total=7482 [2022-01-18 06:03:30,134 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 216 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 2057 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 2670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 556 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:03:30,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 613 Invalid, 2670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2057 Invalid, 0 Unknown, 556 Unchecked, 0.9s Time] [2022-01-18 06:03:30,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-01-18 06:03:30,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 504. [2022-01-18 06:03:30,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 2.05765407554672) internal successors, (1035), 503 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 06:03:30,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1035 transitions. [2022-01-18 06:03:30,143 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1035 transitions. Word has length 33 [2022-01-18 06:03:30,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:03:30,143 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 1035 transitions. [2022-01-18 06:03:30,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:30,143 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1035 transitions. [2022-01-18 06:03:30,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:03:30,144 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:03:30,144 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:03:30,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-01-18 06:03:30,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:30,359 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:03:30,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:03:30,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1876551796, now seen corresponding path program 78 times [2022-01-18 06:03:30,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:03:30,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71758641] [2022-01-18 06:03:30,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:03:30,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:03:30,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:03:30,666 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:30,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:03:30,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71758641] [2022-01-18 06:03:30,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71758641] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:03:30,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239271818] [2022-01-18 06:03:30,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:03:30,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:30,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:03:30,669 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:03:30,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-18 06:03:30,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:03:30,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:03:30,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:03:30,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:03:31,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:03:31,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:03:31,153 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 27 treesize of output 13 [2022-01-18 06:03:31,326 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:31,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:03:31,863 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:03:31,863 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 42 treesize of output 60 [2022-01-18 06:03:31,931 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:31,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239271818] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:03:31,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:03:31,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:03:31,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113034582] [2022-01-18 06:03:31,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:03:31,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:03:31,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:03:31,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:03:31,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:03:31,932 INFO L87 Difference]: Start difference. First operand 504 states and 1035 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:34,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:03:34,023 INFO L93 Difference]: Finished difference Result 932 states and 1853 transitions. [2022-01-18 06:03:34,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 06:03:34,023 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:03:34,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:03:34,024 INFO L225 Difference]: With dead ends: 932 [2022-01-18 06:03:34,024 INFO L226 Difference]: Without dead ends: 896 [2022-01-18 06:03:34,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 48 SyntacticMatches, 12 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2547 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=639, Invalid=7733, Unknown=0, NotChecked=0, Total=8372 [2022-01-18 06:03:34,025 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 187 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 429 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:03:34,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 680 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1285 Invalid, 0 Unknown, 429 Unchecked, 0.5s Time] [2022-01-18 06:03:34,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-01-18 06:03:34,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 563. [2022-01-18 06:03:34,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 2.0249110320284696) internal successors, (1138), 562 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:34,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1138 transitions. [2022-01-18 06:03:34,042 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1138 transitions. Word has length 33 [2022-01-18 06:03:34,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:03:34,042 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 1138 transitions. [2022-01-18 06:03:34,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:34,043 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1138 transitions. [2022-01-18 06:03:34,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:03:34,043 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:03:34,043 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:03:34,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-01-18 06:03:34,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-01-18 06:03:34,255 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:03:34,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:03:34,256 INFO L85 PathProgramCache]: Analyzing trace with hash -2145694682, now seen corresponding path program 79 times [2022-01-18 06:03:34,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:03:34,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244499941] [2022-01-18 06:03:34,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:03:34,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:03:34,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:03:34,521 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:34,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:03:34,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244499941] [2022-01-18 06:03:34,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244499941] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:03:34,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161437644] [2022-01-18 06:03:34,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:03:34,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:34,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:03:34,523 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:03:34,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-18 06:03:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:03:34,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:03:34,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:03:34,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:03:34,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:03:34,907 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 27 treesize of output 13 [2022-01-18 06:03:35,058 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:35,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:03:35,478 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:03:35,479 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 42 treesize of output 60 [2022-01-18 06:03:35,539 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:35,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161437644] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:03:35,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:03:35,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:03:35,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839505807] [2022-01-18 06:03:35,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:03:35,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:03:35,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:03:35,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:03:35,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:03:35,540 INFO L87 Difference]: Start difference. First operand 563 states and 1138 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:38,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:03:38,809 INFO L93 Difference]: Finished difference Result 1276 states and 2525 transitions. [2022-01-18 06:03:38,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-18 06:03:38,809 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:03:38,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:03:38,811 INFO L225 Difference]: With dead ends: 1276 [2022-01-18 06:03:38,811 INFO L226 Difference]: Without dead ends: 1127 [2022-01-18 06:03:38,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 39 SyntacticMatches, 10 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4257 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1133, Invalid=12207, Unknown=0, NotChecked=0, Total=13340 [2022-01-18 06:03:38,812 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 294 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 3097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 730 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:03:38,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 778 Invalid, 3097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2261 Invalid, 0 Unknown, 730 Unchecked, 0.8s Time] [2022-01-18 06:03:38,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-01-18 06:03:38,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 509. [2022-01-18 06:03:38,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 2.059055118110236) internal successors, (1046), 508 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:38,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1046 transitions. [2022-01-18 06:03:38,819 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1046 transitions. Word has length 33 [2022-01-18 06:03:38,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:03:38,820 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 1046 transitions. [2022-01-18 06:03:38,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:38,820 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1046 transitions. [2022-01-18 06:03:38,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:03:38,820 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:03:38,820 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:03:38,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-01-18 06:03:39,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:39,032 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:03:39,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:03:39,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1777304910, now seen corresponding path program 80 times [2022-01-18 06:03:39,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:03:39,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74053948] [2022-01-18 06:03:39,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:03:39,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:03:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:03:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:39,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:03:39,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74053948] [2022-01-18 06:03:39,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74053948] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:03:39,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626761479] [2022-01-18 06:03:39,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:03:39,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:39,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:03:39,310 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:03:39,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-18 06:03:39,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:03:39,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:03:39,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:03:39,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:03:39,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:03:39,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:03:39,670 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 27 treesize of output 13 [2022-01-18 06:03:39,892 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:39,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:03:40,308 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:03:40,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:03:40,357 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:40,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626761479] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:03:40,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:03:40,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:03:40,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410275459] [2022-01-18 06:03:40,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:03:40,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:03:40,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:03:40,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:03:40,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1468, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:03:40,358 INFO L87 Difference]: Start difference. First operand 509 states and 1046 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:42,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:03:42,610 INFO L93 Difference]: Finished difference Result 1020 states and 2080 transitions. [2022-01-18 06:03:42,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 06:03:42,610 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:03:42,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:03:42,611 INFO L225 Difference]: With dead ends: 1020 [2022-01-18 06:03:42,611 INFO L226 Difference]: Without dead ends: 988 [2022-01-18 06:03:42,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2435 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=830, Invalid=7542, Unknown=0, NotChecked=0, Total=8372 [2022-01-18 06:03:42,613 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 244 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 1916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 344 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:03:42,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 489 Invalid, 1916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1445 Invalid, 0 Unknown, 344 Unchecked, 0.6s Time] [2022-01-18 06:03:42,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2022-01-18 06:03:42,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 514. [2022-01-18 06:03:42,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 2.060428849902534) internal successors, (1057), 513 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:42,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1057 transitions. [2022-01-18 06:03:42,620 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1057 transitions. Word has length 33 [2022-01-18 06:03:42,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:03:42,620 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 1057 transitions. [2022-01-18 06:03:42,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:42,620 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1057 transitions. [2022-01-18 06:03:42,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:03:42,621 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:03:42,621 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:03:42,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-01-18 06:03:42,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:42,821 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:03:42,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:03:42,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1091420020, now seen corresponding path program 81 times [2022-01-18 06:03:42,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:03:42,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354233039] [2022-01-18 06:03:42,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:03:42,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:03:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:03:43,120 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:43,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:03:43,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354233039] [2022-01-18 06:03:43,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354233039] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:03:43,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516421636] [2022-01-18 06:03:43,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:03:43,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:43,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:03:43,123 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:03:43,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-18 06:03:43,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:03:43,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:03:43,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:03:43,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:03:43,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:03:43,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:03:43,442 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 27 treesize of output 13 [2022-01-18 06:03:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:43,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:03:44,041 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:03:44,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:03:44,094 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:44,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516421636] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:03:44,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:03:44,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:03:44,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192745700] [2022-01-18 06:03:44,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:03:44,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:03:44,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:03:44,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:03:44,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:03:44,096 INFO L87 Difference]: Start difference. First operand 514 states and 1057 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:46,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:03:46,979 INFO L93 Difference]: Finished difference Result 945 states and 1913 transitions. [2022-01-18 06:03:46,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 06:03:46,979 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:03:46,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:03:46,980 INFO L225 Difference]: With dead ends: 945 [2022-01-18 06:03:46,980 INFO L226 Difference]: Without dead ends: 917 [2022-01-18 06:03:46,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2826 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1047, Invalid=8853, Unknown=0, NotChecked=0, Total=9900 [2022-01-18 06:03:46,981 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 285 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:03:46,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 390 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1445 Invalid, 0 Unknown, 143 Unchecked, 0.6s Time] [2022-01-18 06:03:46,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2022-01-18 06:03:46,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 506. [2022-01-18 06:03:46,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.0554455445544555) internal successors, (1038), 505 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:46,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1038 transitions. [2022-01-18 06:03:46,987 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1038 transitions. Word has length 33 [2022-01-18 06:03:46,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:03:46,987 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 1038 transitions. [2022-01-18 06:03:46,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:46,987 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1038 transitions. [2022-01-18 06:03:46,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:03:46,987 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:03:46,988 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:03:47,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-01-18 06:03:47,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:47,188 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:03:47,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:03:47,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1883626412, now seen corresponding path program 82 times [2022-01-18 06:03:47,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:03:47,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502158089] [2022-01-18 06:03:47,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:03:47,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:03:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:03:47,462 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:47,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:03:47,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502158089] [2022-01-18 06:03:47,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502158089] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:03:47,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901720413] [2022-01-18 06:03:47,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:03:47,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:47,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:03:47,463 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:03:47,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-18 06:03:47,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:03:47,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:03:47,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:03:47,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:03:47,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:03:47,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:03:47,890 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 27 treesize of output 13 [2022-01-18 06:03:48,041 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:48,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:03:48,449 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:03:48,450 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 42 treesize of output 60 [2022-01-18 06:03:48,499 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:48,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901720413] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:03:48,499 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:03:48,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:03:48,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969722264] [2022-01-18 06:03:48,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:03:48,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:03:48,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:03:48,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:03:48,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:03:48,500 INFO L87 Difference]: Start difference. First operand 506 states and 1038 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:50,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:03:50,487 INFO L93 Difference]: Finished difference Result 914 states and 1839 transitions. [2022-01-18 06:03:50,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 06:03:50,487 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:03:50,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:03:50,488 INFO L225 Difference]: With dead ends: 914 [2022-01-18 06:03:50,488 INFO L226 Difference]: Without dead ends: 883 [2022-01-18 06:03:50,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 39 SyntacticMatches, 11 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2187 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=608, Invalid=6702, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 06:03:50,489 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 210 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 1838 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 873 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:03:50,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 740 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1838 Invalid, 0 Unknown, 873 Unchecked, 0.7s Time] [2022-01-18 06:03:50,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-01-18 06:03:50,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 530. [2022-01-18 06:03:50,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 2.0396975425330814) internal successors, (1079), 529 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:50,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1079 transitions. [2022-01-18 06:03:50,495 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1079 transitions. Word has length 33 [2022-01-18 06:03:50,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:03:50,495 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 1079 transitions. [2022-01-18 06:03:50,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:50,495 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1079 transitions. [2022-01-18 06:03:50,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:03:50,496 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:03:50,496 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:03:50,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-01-18 06:03:50,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:50,696 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:03:50,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:03:50,697 INFO L85 PathProgramCache]: Analyzing trace with hash 838097554, now seen corresponding path program 83 times [2022-01-18 06:03:50,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:03:50,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886399564] [2022-01-18 06:03:50,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:03:50,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:03:50,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:03:50,960 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:50,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:03:50,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886399564] [2022-01-18 06:03:50,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886399564] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:03:50,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103025668] [2022-01-18 06:03:50,960 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:03:50,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:50,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:03:50,961 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:03:50,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-18 06:03:50,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:03:50,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:03:50,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:03:50,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:03:51,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:03:51,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:03:51,413 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 06:03:51,557 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:51,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:03:52,065 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:03:52,066 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 47 treesize of output 63 [2022-01-18 06:03:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:52,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103025668] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:03:52,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:03:52,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-01-18 06:03:52,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120597902] [2022-01-18 06:03:52,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:03:52,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 06:03:52,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:03:52,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 06:03:52,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 06:03:52,126 INFO L87 Difference]: Start difference. First operand 530 states and 1079 transitions. Second operand has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:54,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:03:54,250 INFO L93 Difference]: Finished difference Result 884 states and 1786 transitions. [2022-01-18 06:03:54,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 06:03:54,250 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:03:54,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:03:54,251 INFO L225 Difference]: With dead ends: 884 [2022-01-18 06:03:54,251 INFO L226 Difference]: Without dead ends: 855 [2022-01-18 06:03:54,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 35 SyntacticMatches, 10 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2297 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=625, Invalid=7031, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 06:03:54,252 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 203 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 2166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 402 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:03:54,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 482 Invalid, 2166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1701 Invalid, 0 Unknown, 402 Unchecked, 0.7s Time] [2022-01-18 06:03:54,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-01-18 06:03:54,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 525. [2022-01-18 06:03:54,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 2.0400763358778624) internal successors, (1069), 524 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:54,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1069 transitions. [2022-01-18 06:03:54,258 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1069 transitions. Word has length 33 [2022-01-18 06:03:54,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:03:54,258 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 1069 transitions. [2022-01-18 06:03:54,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:54,258 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1069 transitions. [2022-01-18 06:03:54,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:03:54,259 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:03:54,259 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:03:54,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-01-18 06:03:54,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:54,459 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:03:54,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:03:54,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1321500814, now seen corresponding path program 84 times [2022-01-18 06:03:54,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:03:54,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496995998] [2022-01-18 06:03:54,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:03:54,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:03:54,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:03:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:54,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:03:54,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496995998] [2022-01-18 06:03:54,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496995998] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:03:54,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805138186] [2022-01-18 06:03:54,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:03:54,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:54,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:03:54,721 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:03:54,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-18 06:03:54,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:03:54,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:03:54,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 06:03:54,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:03:55,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:03:55,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:03:55,131 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 29 treesize of output 13 [2022-01-18 06:03:55,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:55,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:03:55,762 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:03:55,762 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 42 treesize of output 60 [2022-01-18 06:03:55,815 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:55,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805138186] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:03:55,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:03:55,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:03:55,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466110627] [2022-01-18 06:03:55,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:03:55,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:03:55,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:03:55,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:03:55,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:03:55,816 INFO L87 Difference]: Start difference. First operand 525 states and 1069 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:57,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:03:57,621 INFO L93 Difference]: Finished difference Result 888 states and 1792 transitions. [2022-01-18 06:03:57,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 06:03:57,621 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:03:57,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:03:57,622 INFO L225 Difference]: With dead ends: 888 [2022-01-18 06:03:57,622 INFO L226 Difference]: Without dead ends: 859 [2022-01-18 06:03:57,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 40 SyntacticMatches, 10 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2032 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=589, Invalid=6383, Unknown=0, NotChecked=0, Total=6972 [2022-01-18 06:03:57,623 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 216 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 1451 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 2150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 639 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:03:57,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 450 Invalid, 2150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1451 Invalid, 0 Unknown, 639 Unchecked, 0.5s Time] [2022-01-18 06:03:57,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2022-01-18 06:03:57,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 503. [2022-01-18 06:03:57,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.051792828685259) internal successors, (1030), 502 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:57,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1030 transitions. [2022-01-18 06:03:57,628 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1030 transitions. Word has length 33 [2022-01-18 06:03:57,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:03:57,629 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 1030 transitions. [2022-01-18 06:03:57,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:57,629 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1030 transitions. [2022-01-18 06:03:57,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:03:57,629 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:03:57,629 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:03:57,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-01-18 06:03:57,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-01-18 06:03:57,830 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:03:57,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:03:57,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1309709944, now seen corresponding path program 85 times [2022-01-18 06:03:57,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:03:57,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129927475] [2022-01-18 06:03:57,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:03:57,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:03:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:03:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:58,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:03:58,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129927475] [2022-01-18 06:03:58,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129927475] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:03:58,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515113421] [2022-01-18 06:03:58,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:03:58,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:58,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:03:58,095 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:03:58,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-18 06:03:58,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:03:58,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:03:58,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:03:58,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:03:58,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:03:58,519 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 27 treesize of output 13 [2022-01-18 06:03:58,658 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:58,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:03:59,065 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:03:59,065 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 42 treesize of output 60 [2022-01-18 06:03:59,125 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:59,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515113421] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:03:59,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:03:59,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:03:59,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428925300] [2022-01-18 06:03:59,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:03:59,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:03:59,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:03:59,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:03:59,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:03:59,126 INFO L87 Difference]: Start difference. First operand 503 states and 1030 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:00,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:04:00,628 INFO L93 Difference]: Finished difference Result 895 states and 1804 transitions. [2022-01-18 06:04:00,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 06:04:00,628 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:04:00,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:04:00,629 INFO L225 Difference]: With dead ends: 895 [2022-01-18 06:04:00,629 INFO L226 Difference]: Without dead ends: 838 [2022-01-18 06:04:00,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 37 SyntacticMatches, 12 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1837 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=515, Invalid=5647, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 06:04:00,630 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 223 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 1872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 659 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:04:00,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 492 Invalid, 1872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1159 Invalid, 0 Unknown, 659 Unchecked, 0.4s Time] [2022-01-18 06:04:00,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-01-18 06:04:00,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 503. [2022-01-18 06:04:00,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.049800796812749) internal successors, (1029), 502 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:00,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1029 transitions. [2022-01-18 06:04:00,653 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1029 transitions. Word has length 33 [2022-01-18 06:04:00,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:04:00,653 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 1029 transitions. [2022-01-18 06:04:00,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:00,653 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1029 transitions. [2022-01-18 06:04:00,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:04:00,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:04:00,654 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:04:00,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-01-18 06:04:00,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:00,869 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:04:00,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:04:00,870 INFO L85 PathProgramCache]: Analyzing trace with hash 2054221944, now seen corresponding path program 86 times [2022-01-18 06:04:00,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:04:00,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012934113] [2022-01-18 06:04:00,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:04:00,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:04:00,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:04:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:01,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:04:01,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012934113] [2022-01-18 06:04:01,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012934113] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:04:01,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491120667] [2022-01-18 06:04:01,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:04:01,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:01,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:04:01,142 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:04:01,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-18 06:04:01,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:04:01,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:04:01,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:04:01,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:04:01,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:01,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:04:01,489 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 27 treesize of output 13 [2022-01-18 06:04:01,675 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:01,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:04:02,102 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:04:02,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:04:02,168 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:02,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491120667] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:04:02,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:04:02,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:04:02,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517624411] [2022-01-18 06:04:02,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:04:02,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:04:02,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:04:02,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:04:02,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1458, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:04:02,169 INFO L87 Difference]: Start difference. First operand 503 states and 1029 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:04,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:04:04,308 INFO L93 Difference]: Finished difference Result 936 states and 1879 transitions. [2022-01-18 06:04:04,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 06:04:04,308 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:04:04,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:04:04,309 INFO L225 Difference]: With dead ends: 936 [2022-01-18 06:04:04,309 INFO L226 Difference]: Without dead ends: 904 [2022-01-18 06:04:04,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2252 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=786, Invalid=7224, Unknown=0, NotChecked=0, Total=8010 [2022-01-18 06:04:04,310 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 234 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 1520 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 2028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:04:04,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 458 Invalid, 2028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1520 Invalid, 0 Unknown, 388 Unchecked, 0.6s Time] [2022-01-18 06:04:04,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2022-01-18 06:04:04,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 504. [2022-01-18 06:04:04,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 2.0497017892644136) internal successors, (1031), 503 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:04,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1031 transitions. [2022-01-18 06:04:04,315 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1031 transitions. Word has length 33 [2022-01-18 06:04:04,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:04:04,316 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 1031 transitions. [2022-01-18 06:04:04,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:04,316 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1031 transitions. [2022-01-18 06:04:04,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:04:04,316 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:04:04,316 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:04:04,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-01-18 06:04:04,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:04,517 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:04:04,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:04:04,517 INFO L85 PathProgramCache]: Analyzing trace with hash -814502986, now seen corresponding path program 87 times [2022-01-18 06:04:04,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:04:04,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603573821] [2022-01-18 06:04:04,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:04:04,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:04:04,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:04:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:04,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:04:04,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603573821] [2022-01-18 06:04:04,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603573821] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:04:04,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853514064] [2022-01-18 06:04:04,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:04:04,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:04,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:04:04,769 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:04:04,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-18 06:04:04,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:04:04,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:04:04,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:04:04,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:04:05,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:04:05,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:05,102 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 27 treesize of output 13 [2022-01-18 06:04:05,269 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:05,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:04:05,686 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:04:05,686 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 42 treesize of output 60 [2022-01-18 06:04:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:05,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853514064] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:04:05,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:04:05,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:04:05,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129083827] [2022-01-18 06:04:05,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:04:05,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:04:05,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:04:05,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:04:05,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1455, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:04:05,746 INFO L87 Difference]: Start difference. First operand 504 states and 1031 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:08,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:04:08,505 INFO L93 Difference]: Finished difference Result 1183 states and 2371 transitions. [2022-01-18 06:04:08,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-18 06:04:08,505 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:04:08,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:04:08,506 INFO L225 Difference]: With dead ends: 1183 [2022-01-18 06:04:08,507 INFO L226 Difference]: Without dead ends: 1155 [2022-01-18 06:04:08,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 38 SyntacticMatches, 12 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3169 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1076, Invalid=9024, Unknown=0, NotChecked=0, Total=10100 [2022-01-18 06:04:08,508 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 284 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 1999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 351 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:04:08,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 461 Invalid, 1999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1508 Invalid, 0 Unknown, 351 Unchecked, 0.6s Time] [2022-01-18 06:04:08,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2022-01-18 06:04:08,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 499. [2022-01-18 06:04:08,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.0502008032128516) internal successors, (1021), 498 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:08,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1021 transitions. [2022-01-18 06:04:08,514 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1021 transitions. Word has length 33 [2022-01-18 06:04:08,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:04:08,514 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 1021 transitions. [2022-01-18 06:04:08,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:08,514 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1021 transitions. [2022-01-18 06:04:08,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:04:08,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:04:08,515 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:04:08,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-01-18 06:04:08,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:08,715 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:04:08,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:04:08,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1885546406, now seen corresponding path program 88 times [2022-01-18 06:04:08,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:04:08,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868418381] [2022-01-18 06:04:08,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:04:08,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:04:08,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:04:08,970 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:08,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:04:08,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868418381] [2022-01-18 06:04:08,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868418381] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:04:08,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878583519] [2022-01-18 06:04:08,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:04:08,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:08,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:04:08,971 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:04:08,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-18 06:04:08,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:04:08,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:04:08,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:04:08,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:04:09,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:09,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:04:09,370 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 27 treesize of output 13 [2022-01-18 06:04:09,518 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:09,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:04:09,953 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:04:09,953 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 42 treesize of output 60 [2022-01-18 06:04:10,014 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:10,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878583519] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:04:10,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:04:10,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:04:10,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395835411] [2022-01-18 06:04:10,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:04:10,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:04:10,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:04:10,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:04:10,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:04:10,015 INFO L87 Difference]: Start difference. First operand 499 states and 1021 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:11,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:04:11,718 INFO L93 Difference]: Finished difference Result 925 states and 1853 transitions. [2022-01-18 06:04:11,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 06:04:11,719 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:04:11,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:04:11,720 INFO L225 Difference]: With dead ends: 925 [2022-01-18 06:04:11,720 INFO L226 Difference]: Without dead ends: 841 [2022-01-18 06:04:11,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1859 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=558, Invalid=6248, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 06:04:11,721 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 212 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 403 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:04:11,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 440 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1383 Invalid, 0 Unknown, 403 Unchecked, 0.5s Time] [2022-01-18 06:04:11,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-01-18 06:04:11,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 505. [2022-01-18 06:04:11,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.0496031746031744) internal successors, (1033), 504 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:11,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1033 transitions. [2022-01-18 06:04:11,726 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1033 transitions. Word has length 33 [2022-01-18 06:04:11,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:04:11,726 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 1033 transitions. [2022-01-18 06:04:11,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:11,726 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1033 transitions. [2022-01-18 06:04:11,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:04:11,727 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:04:11,727 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:04:11,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-01-18 06:04:11,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:11,928 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:04:11,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:04:11,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1244435816, now seen corresponding path program 89 times [2022-01-18 06:04:11,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:04:11,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513039016] [2022-01-18 06:04:11,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:04:11,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:04:11,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:04:12,186 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:12,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:04:12,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513039016] [2022-01-18 06:04:12,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513039016] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:04:12,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775609724] [2022-01-18 06:04:12,186 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:04:12,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:12,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:04:12,188 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:04:12,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-18 06:04:12,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:04:12,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:04:12,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 06:04:12,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:04:12,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:12,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:04:12,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:04:12,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:12,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 06:04:12,750 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:12,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:04:13,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:13,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:13,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:13,246 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:04:13,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 54 [2022-01-18 06:04:13,337 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:13,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775609724] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:04:13,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:04:13,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 45 [2022-01-18 06:04:13,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519330321] [2022-01-18 06:04:13,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:04:13,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 06:04:13,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:04:13,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 06:04:13,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1827, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 06:04:13,338 INFO L87 Difference]: Start difference. First operand 505 states and 1033 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:19,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:04:19,506 INFO L93 Difference]: Finished difference Result 1648 states and 3268 transitions. [2022-01-18 06:04:19,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-18 06:04:19,506 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:04:19,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:04:19,508 INFO L225 Difference]: With dead ends: 1648 [2022-01-18 06:04:19,508 INFO L226 Difference]: Without dead ends: 1484 [2022-01-18 06:04:19,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9447 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=3160, Invalid=25910, Unknown=0, NotChecked=0, Total=29070 [2022-01-18 06:04:19,509 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 489 mSDsluCounter, 1312 mSDsCounter, 0 mSdLazyCounter, 3107 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 4005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 3107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 611 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:04:19,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 797 Invalid, 4005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 3107 Invalid, 0 Unknown, 611 Unchecked, 1.3s Time] [2022-01-18 06:04:19,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2022-01-18 06:04:19,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 539. [2022-01-18 06:04:19,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 2.0483271375464684) internal successors, (1102), 538 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:19,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1102 transitions. [2022-01-18 06:04:19,517 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1102 transitions. Word has length 33 [2022-01-18 06:04:19,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:04:19,517 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 1102 transitions. [2022-01-18 06:04:19,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:19,518 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1102 transitions. [2022-01-18 06:04:19,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:04:19,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:04:19,518 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:04:19,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-01-18 06:04:19,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:19,719 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:04:19,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:04:19,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1624289114, now seen corresponding path program 90 times [2022-01-18 06:04:19,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:04:19,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687453880] [2022-01-18 06:04:19,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:04:19,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:04:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:04:19,967 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:19,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:04:19,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687453880] [2022-01-18 06:04:19,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687453880] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:04:19,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608456387] [2022-01-18 06:04:19,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:04:19,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:19,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:04:19,968 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:04:19,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-18 06:04:19,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:04:19,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:04:19,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 06:04:19,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:04:20,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:04:20,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:04:20,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:20,299 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 06:04:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:20,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:04:20,933 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:04:20,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:04:20,987 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:20,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608456387] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:04:20,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:04:20,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:04:20,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678433220] [2022-01-18 06:04:20,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:04:20,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:04:20,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:04:20,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:04:20,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1454, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:04:20,991 INFO L87 Difference]: Start difference. First operand 539 states and 1102 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:23,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:04:23,553 INFO L93 Difference]: Finished difference Result 1125 states and 2260 transitions. [2022-01-18 06:04:23,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-18 06:04:23,554 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:04:23,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:04:23,555 INFO L225 Difference]: With dead ends: 1125 [2022-01-18 06:04:23,555 INFO L226 Difference]: Without dead ends: 1097 [2022-01-18 06:04:23,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3075 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1045, Invalid=9461, Unknown=0, NotChecked=0, Total=10506 [2022-01-18 06:04:23,556 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 251 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 1800 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:04:23,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 481 Invalid, 2106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1800 Invalid, 0 Unknown, 170 Unchecked, 0.7s Time] [2022-01-18 06:04:23,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2022-01-18 06:04:23,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 539. [2022-01-18 06:04:23,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 2.0483271375464684) internal successors, (1102), 538 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:23,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1102 transitions. [2022-01-18 06:04:23,562 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1102 transitions. Word has length 33 [2022-01-18 06:04:23,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:04:23,563 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 1102 transitions. [2022-01-18 06:04:23,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:23,563 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1102 transitions. [2022-01-18 06:04:23,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:04:23,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:04:23,563 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:04:23,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-01-18 06:04:23,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-01-18 06:04:23,765 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:04:23,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:04:23,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1677127142, now seen corresponding path program 91 times [2022-01-18 06:04:23,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:04:23,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80193025] [2022-01-18 06:04:23,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:04:23,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:04:23,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:04:24,026 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:24,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:04:24,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80193025] [2022-01-18 06:04:24,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80193025] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:04:24,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433497045] [2022-01-18 06:04:24,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:04:24,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:24,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:04:24,028 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:04:24,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-18 06:04:24,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:04:24,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:04:24,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:04:24,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:24,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:04:24,381 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 27 treesize of output 13 [2022-01-18 06:04:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:24,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:04:24,967 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:04:24,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:04:25,015 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:25,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433497045] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:04:25,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:04:25,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:04:25,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169409520] [2022-01-18 06:04:25,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:04:25,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:04:25,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:04:25,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:04:25,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1462, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:04:25,016 INFO L87 Difference]: Start difference. First operand 539 states and 1102 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:26,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:04:26,905 INFO L93 Difference]: Finished difference Result 1087 states and 2194 transitions. [2022-01-18 06:04:26,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 06:04:26,906 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:04:26,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:04:26,907 INFO L225 Difference]: With dead ends: 1087 [2022-01-18 06:04:26,907 INFO L226 Difference]: Without dead ends: 1055 [2022-01-18 06:04:26,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=678, Invalid=6632, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 06:04:26,908 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 177 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 1846 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 2110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:04:26,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 494 Invalid, 2110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1846 Invalid, 0 Unknown, 197 Unchecked, 0.7s Time] [2022-01-18 06:04:26,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2022-01-18 06:04:26,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 535. [2022-01-18 06:04:26,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 2.048689138576779) internal successors, (1094), 534 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:26,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 1094 transitions. [2022-01-18 06:04:26,914 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 1094 transitions. Word has length 33 [2022-01-18 06:04:26,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:04:26,914 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 1094 transitions. [2022-01-18 06:04:26,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:26,914 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 1094 transitions. [2022-01-18 06:04:26,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:04:26,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:04:26,915 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:04:26,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-01-18 06:04:27,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-01-18 06:04:27,115 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:04:27,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:04:27,116 INFO L85 PathProgramCache]: Analyzing trace with hash -250884776, now seen corresponding path program 92 times [2022-01-18 06:04:27,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:04:27,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909709395] [2022-01-18 06:04:27,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:04:27,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:04:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:04:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:27,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:04:27,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909709395] [2022-01-18 06:04:27,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909709395] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:04:27,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422936270] [2022-01-18 06:04:27,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:04:27,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:27,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:04:27,370 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:04:27,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-18 06:04:27,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:04:27,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:04:27,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:04:27,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:04:27,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:27,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:04:27,726 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 27 treesize of output 13 [2022-01-18 06:04:27,911 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:27,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:04:28,328 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:04:28,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:04:28,379 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:28,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422936270] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:04:28,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:04:28,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:04:28,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694935217] [2022-01-18 06:04:28,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:04:28,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:04:28,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:04:28,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:04:28,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1455, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:04:28,381 INFO L87 Difference]: Start difference. First operand 535 states and 1094 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:31,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:04:31,133 INFO L93 Difference]: Finished difference Result 1177 states and 2374 transitions. [2022-01-18 06:04:31,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-18 06:04:31,134 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:04:31,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:04:31,135 INFO L225 Difference]: With dead ends: 1177 [2022-01-18 06:04:31,135 INFO L226 Difference]: Without dead ends: 1149 [2022-01-18 06:04:31,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3368 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1108, Invalid=10234, Unknown=0, NotChecked=0, Total=11342 [2022-01-18 06:04:31,136 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 251 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 1845 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 2304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 318 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:04:31,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 510 Invalid, 2304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1845 Invalid, 0 Unknown, 318 Unchecked, 0.7s Time] [2022-01-18 06:04:31,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-01-18 06:04:31,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 537. [2022-01-18 06:04:31,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 2.048507462686567) internal successors, (1098), 536 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:31,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1098 transitions. [2022-01-18 06:04:31,143 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1098 transitions. Word has length 33 [2022-01-18 06:04:31,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:04:31,143 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 1098 transitions. [2022-01-18 06:04:31,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:31,143 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1098 transitions. [2022-01-18 06:04:31,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:04:31,144 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:04:31,144 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:04:31,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-01-18 06:04:31,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:31,344 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:04:31,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:04:31,345 INFO L85 PathProgramCache]: Analyzing trace with hash 104407902, now seen corresponding path program 93 times [2022-01-18 06:04:31,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:04:31,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719734161] [2022-01-18 06:04:31,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:04:31,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:04:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:04:31,595 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:31,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:04:31,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719734161] [2022-01-18 06:04:31,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719734161] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:04:31,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998145960] [2022-01-18 06:04:31,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:04:31,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:31,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:04:31,596 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:04:31,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-18 06:04:31,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:04:31,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:04:31,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:04:31,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:04:31,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:31,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:04:31,899 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 27 treesize of output 13 [2022-01-18 06:04:32,109 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:32,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:04:32,508 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:04:32,508 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 42 treesize of output 60 [2022-01-18 06:04:32,567 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:32,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998145960] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:04:32,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:04:32,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:04:32,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927095953] [2022-01-18 06:04:32,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:04:32,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:04:32,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:04:32,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:04:32,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:04:32,568 INFO L87 Difference]: Start difference. First operand 537 states and 1098 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:34,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:04:34,171 INFO L93 Difference]: Finished difference Result 1024 states and 2066 transitions. [2022-01-18 06:04:34,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 06:04:34,172 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:04:34,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:04:34,173 INFO L225 Difference]: With dead ends: 1024 [2022-01-18 06:04:34,173 INFO L226 Difference]: Without dead ends: 992 [2022-01-18 06:04:34,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1661 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=565, Invalid=5755, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 06:04:34,174 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 176 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 1737 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 1954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:04:34,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 450 Invalid, 1954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1737 Invalid, 0 Unknown, 155 Unchecked, 0.6s Time] [2022-01-18 06:04:34,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2022-01-18 06:04:34,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 538. [2022-01-18 06:04:34,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 2.0484171322160147) internal successors, (1100), 537 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:34,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1100 transitions. [2022-01-18 06:04:34,180 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1100 transitions. Word has length 33 [2022-01-18 06:04:34,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:04:34,180 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 1100 transitions. [2022-01-18 06:04:34,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:34,180 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1100 transitions. [2022-01-18 06:04:34,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:04:34,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:04:34,181 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:04:34,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-01-18 06:04:34,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:34,384 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:04:34,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:04:34,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1530650268, now seen corresponding path program 94 times [2022-01-18 06:04:34,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:04:34,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215372228] [2022-01-18 06:04:34,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:04:34,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:04:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:04:34,645 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:34,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:04:34,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215372228] [2022-01-18 06:04:34,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215372228] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:04:34,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107690163] [2022-01-18 06:04:34,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:04:34,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:34,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:04:34,647 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:04:34,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-18 06:04:34,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:04:34,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:04:34,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:04:34,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:04:34,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:34,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:04:34,957 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 27 treesize of output 13 [2022-01-18 06:04:35,162 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:35,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:04:35,594 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:04:35,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:04:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:35,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107690163] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:04:35,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:04:35,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:04:35,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633909980] [2022-01-18 06:04:35,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:04:35,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:04:35,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:04:35,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:04:35,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1461, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:04:35,647 INFO L87 Difference]: Start difference. First operand 538 states and 1100 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:37,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:04:37,816 INFO L93 Difference]: Finished difference Result 1023 states and 2068 transitions. [2022-01-18 06:04:37,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 06:04:37,817 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:04:37,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:04:37,818 INFO L225 Difference]: With dead ends: 1023 [2022-01-18 06:04:37,818 INFO L226 Difference]: Without dead ends: 995 [2022-01-18 06:04:37,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2175 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=792, Invalid=7398, Unknown=0, NotChecked=0, Total=8190 [2022-01-18 06:04:37,819 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 208 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 2093 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 2314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:04:37,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 494 Invalid, 2314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2093 Invalid, 0 Unknown, 139 Unchecked, 0.8s Time] [2022-01-18 06:04:37,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-01-18 06:04:37,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 538. [2022-01-18 06:04:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 2.0484171322160147) internal successors, (1100), 537 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:37,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1100 transitions. [2022-01-18 06:04:37,827 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1100 transitions. Word has length 33 [2022-01-18 06:04:37,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:04:37,827 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 1100 transitions. [2022-01-18 06:04:37,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:37,828 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1100 transitions. [2022-01-18 06:04:37,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:04:37,828 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:04:37,828 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:04:37,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-01-18 06:04:38,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-01-18 06:04:38,033 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:04:38,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:04:38,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1729135732, now seen corresponding path program 95 times [2022-01-18 06:04:38,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:04:38,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688047625] [2022-01-18 06:04:38,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:04:38,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:04:38,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:04:38,318 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:38,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:04:38,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688047625] [2022-01-18 06:04:38,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688047625] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:04:38,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960945366] [2022-01-18 06:04:38,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:04:38,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:38,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:04:38,320 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:04:38,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-01-18 06:04:38,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:04:38,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:04:38,344 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:04:38,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:04:38,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:04:38,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:38,687 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 27 treesize of output 13 [2022-01-18 06:04:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:38,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:04:39,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:39,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:39,542 INFO L353 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2022-01-18 06:04:39,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 55 [2022-01-18 06:04:39,642 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:39,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960945366] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:04:39,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:04:39,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 48 [2022-01-18 06:04:39,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309001203] [2022-01-18 06:04:39,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:04:39,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-18 06:04:39,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:04:39,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-18 06:04:39,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=2093, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 06:04:39,643 INFO L87 Difference]: Start difference. First operand 538 states and 1100 transitions. Second operand has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:44,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:04:44,412 INFO L93 Difference]: Finished difference Result 1283 states and 2509 transitions. [2022-01-18 06:04:44,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-18 06:04:44,412 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:04:44,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:04:44,413 INFO L225 Difference]: With dead ends: 1283 [2022-01-18 06:04:44,413 INFO L226 Difference]: Without dead ends: 1171 [2022-01-18 06:04:44,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5613 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1985, Invalid=17197, Unknown=0, NotChecked=0, Total=19182 [2022-01-18 06:04:44,415 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 359 mSDsluCounter, 1726 mSDsCounter, 0 mSdLazyCounter, 3629 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 4274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 3629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 475 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:04:44,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 987 Invalid, 4274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 3629 Invalid, 0 Unknown, 475 Unchecked, 1.4s Time] [2022-01-18 06:04:44,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2022-01-18 06:04:44,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 542. [2022-01-18 06:04:44,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.048059149722736) internal successors, (1108), 541 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:44,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1108 transitions. [2022-01-18 06:04:44,422 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1108 transitions. Word has length 33 [2022-01-18 06:04:44,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:04:44,422 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 1108 transitions. [2022-01-18 06:04:44,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:44,422 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1108 transitions. [2022-01-18 06:04:44,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:04:44,422 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:04:44,423 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:04:44,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-01-18 06:04:44,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:44,623 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:04:44,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:04:44,623 INFO L85 PathProgramCache]: Analyzing trace with hash 747488074, now seen corresponding path program 96 times [2022-01-18 06:04:44,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:04:44,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856220490] [2022-01-18 06:04:44,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:04:44,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:04:44,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:04:44,878 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:44,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:04:44,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856220490] [2022-01-18 06:04:44,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856220490] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:04:44,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226987029] [2022-01-18 06:04:44,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:04:44,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:44,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:04:44,879 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:04:44,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-01-18 06:04:44,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:04:44,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:04:44,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 06:04:44,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:04:45,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:45,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:04:45,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 06:04:45,409 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:45,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:04:45,836 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:04:45,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:04:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:45,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226987029] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:04:45,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:04:45,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:04:45,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333807581] [2022-01-18 06:04:45,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:04:45,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:04:45,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:04:45,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:04:45,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:04:45,895 INFO L87 Difference]: Start difference. First operand 542 states and 1108 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:47,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:04:47,595 INFO L93 Difference]: Finished difference Result 810 states and 1637 transitions. [2022-01-18 06:04:47,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 06:04:47,595 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:04:47,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:04:47,597 INFO L225 Difference]: With dead ends: 810 [2022-01-18 06:04:47,597 INFO L226 Difference]: Without dead ends: 774 [2022-01-18 06:04:47,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1915 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=547, Invalid=5773, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 06:04:47,598 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 174 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 1441 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 1656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:04:47,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 450 Invalid, 1656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1441 Invalid, 0 Unknown, 154 Unchecked, 0.6s Time] [2022-01-18 06:04:47,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-01-18 06:04:47,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 552. [2022-01-18 06:04:47,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 2.043557168784029) internal successors, (1126), 551 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:47,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1126 transitions. [2022-01-18 06:04:47,605 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1126 transitions. Word has length 33 [2022-01-18 06:04:47,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:04:47,605 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 1126 transitions. [2022-01-18 06:04:47,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:47,605 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1126 transitions. [2022-01-18 06:04:47,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:04:47,606 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:04:47,606 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:04:47,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-01-18 06:04:47,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:47,806 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:04:47,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:04:47,807 INFO L85 PathProgramCache]: Analyzing trace with hash -28897898, now seen corresponding path program 97 times [2022-01-18 06:04:47,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:04:47,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824876691] [2022-01-18 06:04:47,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:04:47,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:04:47,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:04:48,087 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:48,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:04:48,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824876691] [2022-01-18 06:04:48,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824876691] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:04:48,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350709214] [2022-01-18 06:04:48,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:04:48,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:48,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:04:48,088 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:04:48,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-01-18 06:04:48,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:04:48,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:04:48,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:04:48,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:04:48,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:48,476 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 27 treesize of output 13 [2022-01-18 06:04:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:48,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:04:49,016 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:04:49,016 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 42 treesize of output 60 [2022-01-18 06:04:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:49,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350709214] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:04:49,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:04:49,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:04:49,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803599915] [2022-01-18 06:04:49,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:04:49,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:04:49,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:04:49,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:04:49,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:04:49,078 INFO L87 Difference]: Start difference. First operand 552 states and 1126 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:50,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:04:50,051 INFO L93 Difference]: Finished difference Result 685 states and 1377 transitions. [2022-01-18 06:04:50,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 06:04:50,051 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:04:50,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:04:50,052 INFO L225 Difference]: With dead ends: 685 [2022-01-18 06:04:50,052 INFO L226 Difference]: Without dead ends: 636 [2022-01-18 06:04:50,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 38 SyntacticMatches, 12 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=371, Invalid=3411, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 06:04:50,052 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 153 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:04:50,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 492 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1057 Invalid, 0 Unknown, 240 Unchecked, 0.4s Time] [2022-01-18 06:04:50,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-01-18 06:04:50,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 543. [2022-01-18 06:04:50,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 2.047970479704797) internal successors, (1110), 542 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:50,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1110 transitions. [2022-01-18 06:04:50,057 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1110 transitions. Word has length 33 [2022-01-18 06:04:50,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:04:50,057 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 1110 transitions. [2022-01-18 06:04:50,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:50,058 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1110 transitions. [2022-01-18 06:04:50,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:04:50,058 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:04:50,058 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:04:50,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-01-18 06:04:50,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-01-18 06:04:50,258 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:04:50,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:04:50,259 INFO L85 PathProgramCache]: Analyzing trace with hash 2133110664, now seen corresponding path program 98 times [2022-01-18 06:04:50,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:04:50,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428844043] [2022-01-18 06:04:50,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:04:50,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:04:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:04:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:50,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:04:50,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428844043] [2022-01-18 06:04:50,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428844043] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:04:50,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340595814] [2022-01-18 06:04:50,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:04:50,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:50,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:04:50,515 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:04:50,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-01-18 06:04:50,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:04:50,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:04:50,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:04:50,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:04:50,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:50,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:04:50,913 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 27 treesize of output 13 [2022-01-18 06:04:51,053 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:51,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:04:51,462 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:04:51,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:04:51,520 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:51,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340595814] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:04:51,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:04:51,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:04:51,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053711243] [2022-01-18 06:04:51,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:04:51,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:04:51,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:04:51,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:04:51,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:04:51,521 INFO L87 Difference]: Start difference. First operand 543 states and 1110 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:54,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:04:54,258 INFO L93 Difference]: Finished difference Result 1127 states and 2255 transitions. [2022-01-18 06:04:54,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-18 06:04:54,258 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:04:54,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:04:54,259 INFO L225 Difference]: With dead ends: 1127 [2022-01-18 06:04:54,259 INFO L226 Difference]: Without dead ends: 1031 [2022-01-18 06:04:54,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3124 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=930, Invalid=9782, Unknown=0, NotChecked=0, Total=10712 [2022-01-18 06:04:54,261 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 267 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 2361 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 2591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:04:54,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 601 Invalid, 2591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2361 Invalid, 0 Unknown, 121 Unchecked, 0.9s Time] [2022-01-18 06:04:54,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2022-01-18 06:04:54,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 551. [2022-01-18 06:04:54,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 550 states have (on average 2.0490909090909093) internal successors, (1127), 550 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:54,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 1127 transitions. [2022-01-18 06:04:54,266 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 1127 transitions. Word has length 33 [2022-01-18 06:04:54,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:04:54,267 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 1127 transitions. [2022-01-18 06:04:54,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:54,267 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 1127 transitions. [2022-01-18 06:04:54,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:04:54,267 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:04:54,267 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:04:54,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-01-18 06:04:54,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-01-18 06:04:54,468 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:04:54,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:04:54,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1492000074, now seen corresponding path program 99 times [2022-01-18 06:04:54,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:04:54,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313232625] [2022-01-18 06:04:54,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:04:54,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:04:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:04:54,717 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:54,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:04:54,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313232625] [2022-01-18 06:04:54,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313232625] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:04:54,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330245990] [2022-01-18 06:04:54,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:04:54,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:54,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:04:54,719 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:04:54,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-01-18 06:04:54,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:04:54,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:04:54,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:04:54,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:04:55,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:04:55,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:55,045 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 27 treesize of output 13 [2022-01-18 06:04:55,221 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:55,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:04:55,628 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:04:55,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:04:55,675 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:55,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330245990] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:04:55,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:04:55,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:04:55,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803388223] [2022-01-18 06:04:55,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:04:55,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:04:55,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:04:55,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:04:55,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:04:55,676 INFO L87 Difference]: Start difference. First operand 551 states and 1127 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:58,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:04:58,005 INFO L93 Difference]: Finished difference Result 911 states and 1830 transitions. [2022-01-18 06:04:58,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 06:04:58,005 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:04:58,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:04:58,006 INFO L225 Difference]: With dead ends: 911 [2022-01-18 06:04:58,006 INFO L226 Difference]: Without dead ends: 879 [2022-01-18 06:04:58,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2215 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=755, Invalid=6901, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 06:04:58,007 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 197 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 1951 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 2337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:04:58,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 605 Invalid, 2337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1951 Invalid, 0 Unknown, 272 Unchecked, 0.7s Time] [2022-01-18 06:04:58,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-01-18 06:04:58,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 554. [2022-01-18 06:04:58,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 2.0488245931283906) internal successors, (1133), 553 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:58,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1133 transitions. [2022-01-18 06:04:58,012 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1133 transitions. Word has length 33 [2022-01-18 06:04:58,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:04:58,013 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1133 transitions. [2022-01-18 06:04:58,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:58,013 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1133 transitions. [2022-01-18 06:04:58,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:04:58,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:04:58,013 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:04:58,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-01-18 06:04:58,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:58,214 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:04:58,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:04:58,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1376724856, now seen corresponding path program 100 times [2022-01-18 06:04:58,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:04:58,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475268405] [2022-01-18 06:04:58,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:04:58,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:04:58,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:04:58,461 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:58,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:04:58,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475268405] [2022-01-18 06:04:58,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475268405] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:04:58,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276619603] [2022-01-18 06:04:58,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:04:58,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:58,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:04:58,462 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:04:58,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-01-18 06:04:58,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:04:58,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:04:58,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:04:58,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:04:58,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:04:58,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:04:58,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 06:04:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:58,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:04:59,369 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:04:59,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:04:59,430 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:59,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276619603] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:04:59,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:04:59,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:04:59,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129119607] [2022-01-18 06:04:59,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:04:59,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:04:59,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:04:59,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:04:59,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:04:59,431 INFO L87 Difference]: Start difference. First operand 554 states and 1133 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:02,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:05:02,610 INFO L93 Difference]: Finished difference Result 1082 states and 2167 transitions. [2022-01-18 06:05:02,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-18 06:05:02,611 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:05:02,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:05:02,612 INFO L225 Difference]: With dead ends: 1082 [2022-01-18 06:05:02,612 INFO L226 Difference]: Without dead ends: 1026 [2022-01-18 06:05:02,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 39 SyntacticMatches, 11 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3756 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1258, Invalid=10514, Unknown=0, NotChecked=0, Total=11772 [2022-01-18 06:05:02,613 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 338 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 2366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 554 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:05:02,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 416 Invalid, 2366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1626 Invalid, 0 Unknown, 554 Unchecked, 0.6s Time] [2022-01-18 06:05:02,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2022-01-18 06:05:02,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 549. [2022-01-18 06:05:02,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.0492700729927007) internal successors, (1123), 548 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:02,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1123 transitions. [2022-01-18 06:05:02,619 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1123 transitions. Word has length 33 [2022-01-18 06:05:02,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:05:02,619 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 1123 transitions. [2022-01-18 06:05:02,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:02,619 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1123 transitions. [2022-01-18 06:05:02,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:05:02,620 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:05:02,620 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:05:02,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-01-18 06:05:02,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:05:02,820 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:05:02,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:05:02,820 INFO L85 PathProgramCache]: Analyzing trace with hash -93323014, now seen corresponding path program 101 times [2022-01-18 06:05:02,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:05:02,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387401122] [2022-01-18 06:05:02,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:05:02,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:05:02,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:05:03,105 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:03,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:05:03,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387401122] [2022-01-18 06:05:03,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387401122] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:05:03,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377462971] [2022-01-18 06:05:03,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:05:03,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:05:03,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:05:03,113 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:05:03,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-01-18 06:05:03,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:05:03,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:05:03,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:05:03,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:05:03,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:05:03,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:05:03,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:05:03,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 06:05:03,779 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:03,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:05:04,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:05:04,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:05:04,327 INFO L353 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2022-01-18 06:05:04,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 55 [2022-01-18 06:05:04,441 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:04,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377462971] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:05:04,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:05:04,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 48 [2022-01-18 06:05:04,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491678847] [2022-01-18 06:05:04,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:05:04,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-18 06:05:04,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:05:04,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-18 06:05:04,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2101, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 06:05:04,442 INFO L87 Difference]: Start difference. First operand 549 states and 1123 transitions. Second operand has 49 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 48 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:07,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:05:07,021 INFO L93 Difference]: Finished difference Result 971 states and 1955 transitions. [2022-01-18 06:05:07,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 06:05:07,021 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 48 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:05:07,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:05:07,022 INFO L225 Difference]: With dead ends: 971 [2022-01-18 06:05:07,022 INFO L226 Difference]: Without dead ends: 931 [2022-01-18 06:05:07,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 33 SyntacticMatches, 10 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3164 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1012, Invalid=9088, Unknown=0, NotChecked=0, Total=10100 [2022-01-18 06:05:07,023 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 248 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 2100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 340 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:05:07,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 414 Invalid, 2100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1659 Invalid, 0 Unknown, 340 Unchecked, 0.7s Time] [2022-01-18 06:05:07,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-01-18 06:05:07,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 549. [2022-01-18 06:05:07,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.0474452554744524) internal successors, (1122), 548 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:07,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1122 transitions. [2022-01-18 06:05:07,029 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1122 transitions. Word has length 33 [2022-01-18 06:05:07,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:05:07,029 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 1122 transitions. [2022-01-18 06:05:07,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 48 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:07,029 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1122 transitions. [2022-01-18 06:05:07,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:05:07,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:05:07,030 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:05:07,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-01-18 06:05:07,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-01-18 06:05:07,243 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:05:07,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:05:07,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1860860232, now seen corresponding path program 102 times [2022-01-18 06:05:07,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:05:07,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693454355] [2022-01-18 06:05:07,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:05:07,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:05:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:05:07,529 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:07,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:05:07,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693454355] [2022-01-18 06:05:07,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693454355] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:05:07,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249447160] [2022-01-18 06:05:07,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:05:07,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:05:07,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:05:07,530 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:05:07,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-01-18 06:05:07,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:05:07,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:05:07,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 06:05:07,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:05:07,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:05:07,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:05:07,926 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 27 treesize of output 13 [2022-01-18 06:05:08,078 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:08,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:05:08,488 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:05:08,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:05:08,549 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:08,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249447160] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:05:08,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:05:08,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:05:08,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781106214] [2022-01-18 06:05:08,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:05:08,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:05:08,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:05:08,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:05:08,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:05:08,550 INFO L87 Difference]: Start difference. First operand 549 states and 1122 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:10,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:05:10,241 INFO L93 Difference]: Finished difference Result 904 states and 1824 transitions. [2022-01-18 06:05:10,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 06:05:10,242 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:05:10,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:05:10,243 INFO L225 Difference]: With dead ends: 904 [2022-01-18 06:05:10,243 INFO L226 Difference]: Without dead ends: 868 [2022-01-18 06:05:10,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 38 SyntacticMatches, 10 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1848 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=574, Invalid=5906, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 06:05:10,244 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 176 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 1542 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 1953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 347 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:05:10,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 443 Invalid, 1953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1542 Invalid, 0 Unknown, 347 Unchecked, 0.6s Time] [2022-01-18 06:05:10,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-01-18 06:05:10,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 549. [2022-01-18 06:05:10,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.045620437956204) internal successors, (1121), 548 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:10,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1121 transitions. [2022-01-18 06:05:10,250 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1121 transitions. Word has length 33 [2022-01-18 06:05:10,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:05:10,250 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 1121 transitions. [2022-01-18 06:05:10,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:10,250 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1121 transitions. [2022-01-18 06:05:10,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:05:10,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:05:10,251 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:05:10,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-01-18 06:05:10,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-01-18 06:05:10,452 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:05:10,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:05:10,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2108456312, now seen corresponding path program 103 times [2022-01-18 06:05:10,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:05:10,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778589435] [2022-01-18 06:05:10,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:05:10,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:05:10,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:05:10,739 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:10,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:05:10,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778589435] [2022-01-18 06:05:10,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778589435] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:05:10,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240005131] [2022-01-18 06:05:10,740 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:05:10,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:05:10,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:05:10,741 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:05:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:05:10,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:05:10,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:05:10,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-01-18 06:05:11,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:05:11,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:05:11,059 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 27 treesize of output 13 [2022-01-18 06:05:11,223 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:11,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:05:11,631 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:05:11,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:05:11,687 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:11,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240005131] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:05:11,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:05:11,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:05:11,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32416929] [2022-01-18 06:05:11,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:05:11,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:05:11,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:05:11,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:05:11,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1452, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:05:11,688 INFO L87 Difference]: Start difference. First operand 549 states and 1121 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:14,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:05:14,905 INFO L93 Difference]: Finished difference Result 1146 states and 2299 transitions. [2022-01-18 06:05:14,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-18 06:05:14,906 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:05:14,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:05:14,907 INFO L225 Difference]: With dead ends: 1146 [2022-01-18 06:05:14,907 INFO L226 Difference]: Without dead ends: 1118 [2022-01-18 06:05:14,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4453 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1493, Invalid=12549, Unknown=0, NotChecked=0, Total=14042 [2022-01-18 06:05:14,908 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 241 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 1932 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 2445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 392 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:05:14,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 418 Invalid, 2445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1932 Invalid, 0 Unknown, 392 Unchecked, 0.7s Time] [2022-01-18 06:05:14,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-01-18 06:05:14,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 548. [2022-01-18 06:05:14,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 2.045703839122486) internal successors, (1119), 547 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:14,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1119 transitions. [2022-01-18 06:05:14,914 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1119 transitions. Word has length 33 [2022-01-18 06:05:14,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:05:14,915 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 1119 transitions. [2022-01-18 06:05:14,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:14,915 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1119 transitions. [2022-01-18 06:05:14,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:05:14,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:05:14,915 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:05:14,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-01-18 06:05:15,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:05:15,116 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:05:15,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:05:15,116 INFO L85 PathProgramCache]: Analyzing trace with hash -457813968, now seen corresponding path program 104 times [2022-01-18 06:05:15,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:05:15,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449710564] [2022-01-18 06:05:15,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:05:15,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:05:15,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:05:15,365 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:15,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:05:15,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449710564] [2022-01-18 06:05:15,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449710564] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:05:15,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640996762] [2022-01-18 06:05:15,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:05:15,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:05:15,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:05:15,366 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:05:15,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-01-18 06:05:15,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:05:15,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:05:15,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:05:15,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:05:15,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:05:15,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:05:15,646 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 27 treesize of output 13 [2022-01-18 06:05:15,847 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:15,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:05:16,256 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:05:16,256 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 42 treesize of output 60 [2022-01-18 06:05:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:16,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640996762] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:05:16,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:05:16,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:05:16,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316892481] [2022-01-18 06:05:16,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:05:16,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:05:16,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:05:16,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:05:16,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1465, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:05:16,304 INFO L87 Difference]: Start difference. First operand 548 states and 1119 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:18,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:05:18,127 INFO L93 Difference]: Finished difference Result 873 states and 1752 transitions. [2022-01-18 06:05:18,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 06:05:18,128 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:05:18,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:05:18,129 INFO L225 Difference]: With dead ends: 873 [2022-01-18 06:05:18,129 INFO L226 Difference]: Without dead ends: 841 [2022-01-18 06:05:18,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1820 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=630, Invalid=6012, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 06:05:18,130 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 182 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:05:18,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 431 Invalid, 1997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1775 Invalid, 0 Unknown, 143 Unchecked, 0.7s Time] [2022-01-18 06:05:18,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-01-18 06:05:18,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 549. [2022-01-18 06:05:18,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.045620437956204) internal successors, (1121), 548 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:18,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1121 transitions. [2022-01-18 06:05:18,135 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1121 transitions. Word has length 33 [2022-01-18 06:05:18,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:05:18,136 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 1121 transitions. [2022-01-18 06:05:18,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:18,136 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1121 transitions. [2022-01-18 06:05:18,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:05:18,136 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:05:18,136 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:05:18,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-01-18 06:05:18,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:05:18,337 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:05:18,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:05:18,338 INFO L85 PathProgramCache]: Analyzing trace with hash 968428398, now seen corresponding path program 105 times [2022-01-18 06:05:18,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:05:18,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432638794] [2022-01-18 06:05:18,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:05:18,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:05:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:05:18,585 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:18,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:05:18,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432638794] [2022-01-18 06:05:18,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432638794] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:05:18,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658075540] [2022-01-18 06:05:18,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:05:18,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:05:18,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:05:18,587 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:05:18,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-01-18 06:05:18,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:05:18,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:05:18,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 06:05:18,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:05:18,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:05:18,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:05:18,889 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 27 treesize of output 13 [2022-01-18 06:05:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:19,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:05:19,620 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:05:19,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 63 [2022-01-18 06:05:19,675 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:19,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658075540] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:05:19,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:05:19,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-01-18 06:05:19,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026743626] [2022-01-18 06:05:19,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:05:19,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 06:05:19,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:05:19,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 06:05:19,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1763, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 06:05:19,676 INFO L87 Difference]: Start difference. First operand 549 states and 1121 transitions. Second operand has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:23,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:05:23,022 INFO L93 Difference]: Finished difference Result 1055 states and 2099 transitions. [2022-01-18 06:05:23,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-18 06:05:23,022 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:05:23,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:05:23,024 INFO L225 Difference]: With dead ends: 1055 [2022-01-18 06:05:23,024 INFO L226 Difference]: Without dead ends: 985 [2022-01-18 06:05:23,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4171 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1429, Invalid=12377, Unknown=0, NotChecked=0, Total=13806 [2022-01-18 06:05:23,025 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 325 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 2559 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 2839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 2559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:05:23,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 423 Invalid, 2839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 2559 Invalid, 0 Unknown, 102 Unchecked, 1.0s Time] [2022-01-18 06:05:23,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2022-01-18 06:05:23,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 557. [2022-01-18 06:05:23,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 2.0449640287769784) internal successors, (1137), 556 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:23,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 1137 transitions. [2022-01-18 06:05:23,031 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 1137 transitions. Word has length 33 [2022-01-18 06:05:23,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:05:23,031 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 1137 transitions. [2022-01-18 06:05:23,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:23,032 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 1137 transitions. [2022-01-18 06:05:23,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:05:23,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:05:23,032 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:05:23,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-01-18 06:05:23,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2022-01-18 06:05:23,233 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:05:23,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:05:23,233 INFO L85 PathProgramCache]: Analyzing trace with hash 420173180, now seen corresponding path program 106 times [2022-01-18 06:05:23,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:05:23,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552917968] [2022-01-18 06:05:23,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:05:23,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:05:23,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:05:23,483 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:23,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:05:23,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552917968] [2022-01-18 06:05:23,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552917968] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:05:23,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848329524] [2022-01-18 06:05:23,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:05:23,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:05:23,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:05:23,484 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:05:23,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-01-18 06:05:23,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:05:23,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:05:23,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:05:23,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:05:23,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:05:23,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:05:23,886 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 27 treesize of output 13 [2022-01-18 06:05:24,029 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:24,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:05:24,438 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:05:24,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:05:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:24,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848329524] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:05:24,505 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:05:24,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:05:24,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312665383] [2022-01-18 06:05:24,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:05:24,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:05:24,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:05:24,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:05:24,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:05:24,506 INFO L87 Difference]: Start difference. First operand 557 states and 1137 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:26,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:05:26,235 INFO L93 Difference]: Finished difference Result 903 states and 1811 transitions. [2022-01-18 06:05:26,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 06:05:26,236 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:05:26,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:05:26,237 INFO L225 Difference]: With dead ends: 903 [2022-01-18 06:05:26,237 INFO L226 Difference]: Without dead ends: 855 [2022-01-18 06:05:26,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2219 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=629, Invalid=6681, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 06:05:26,238 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 208 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1629 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 1886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:05:26,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 394 Invalid, 1886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1629 Invalid, 0 Unknown, 178 Unchecked, 0.6s Time] [2022-01-18 06:05:26,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-01-18 06:05:26,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 561. [2022-01-18 06:05:26,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 2.044642857142857) internal successors, (1145), 560 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:26,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 1145 transitions. [2022-01-18 06:05:26,244 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 1145 transitions. Word has length 33 [2022-01-18 06:05:26,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:05:26,244 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 1145 transitions. [2022-01-18 06:05:26,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:26,244 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 1145 transitions. [2022-01-18 06:05:26,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:05:26,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:05:26,244 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:05:26,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-01-18 06:05:26,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-01-18 06:05:26,445 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:05:26,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:05:26,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1805795770, now seen corresponding path program 107 times [2022-01-18 06:05:26,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:05:26,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912313683] [2022-01-18 06:05:26,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:05:26,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:05:26,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:05:26,724 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:26,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:05:26,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912313683] [2022-01-18 06:05:26,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912313683] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:05:26,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017486420] [2022-01-18 06:05:26,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:05:26,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:05:26,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:05:26,725 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:05:26,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-01-18 06:05:26,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:05:26,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:05:26,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 06:05:26,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:05:27,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:05:27,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:05:27,125 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 06:05:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:27,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:05:27,660 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:05:27,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:05:27,712 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:27,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017486420] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:05:27,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:05:27,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:05:27,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613821712] [2022-01-18 06:05:27,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:05:27,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:05:27,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:05:27,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:05:27,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:05:27,713 INFO L87 Difference]: Start difference. First operand 561 states and 1145 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:30,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:05:30,296 INFO L93 Difference]: Finished difference Result 1060 states and 2131 transitions. [2022-01-18 06:05:30,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 06:05:30,296 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:05:30,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:05:30,297 INFO L225 Difference]: With dead ends: 1060 [2022-01-18 06:05:30,298 INFO L226 Difference]: Without dead ends: 1006 [2022-01-18 06:05:30,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 37 SyntacticMatches, 14 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3380 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=875, Invalid=9025, Unknown=0, NotChecked=0, Total=9900 [2022-01-18 06:05:30,298 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 244 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 2026 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 2864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 754 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:05:30,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 621 Invalid, 2864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2026 Invalid, 0 Unknown, 754 Unchecked, 0.8s Time] [2022-01-18 06:05:30,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2022-01-18 06:05:30,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 561. [2022-01-18 06:05:30,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 2.044642857142857) internal successors, (1145), 560 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:30,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 1145 transitions. [2022-01-18 06:05:30,304 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 1145 transitions. Word has length 33 [2022-01-18 06:05:30,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:05:30,304 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 1145 transitions. [2022-01-18 06:05:30,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:30,304 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 1145 transitions. [2022-01-18 06:05:30,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:05:30,305 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:05:30,305 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:05:30,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-01-18 06:05:30,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-01-18 06:05:30,505 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:05:30,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:05:30,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1164685180, now seen corresponding path program 108 times [2022-01-18 06:05:30,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:05:30,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628226481] [2022-01-18 06:05:30,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:05:30,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:05:30,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:05:30,763 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:30,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:05:30,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628226481] [2022-01-18 06:05:30,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628226481] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:05:30,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229867865] [2022-01-18 06:05:30,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:05:30,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:05:30,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:05:30,765 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:05:30,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-01-18 06:05:30,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:05:30,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:05:30,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 06:05:30,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:05:31,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:05:31,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:05:31,116 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 06:05:31,299 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:31,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:05:31,697 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:05:31,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:05:31,753 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:31,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229867865] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:05:31,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:05:31,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:05:31,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386490528] [2022-01-18 06:05:31,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:05:31,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:05:31,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:05:31,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:05:31,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1461, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:05:31,755 INFO L87 Difference]: Start difference. First operand 561 states and 1145 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:35,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:05:35,684 INFO L93 Difference]: Finished difference Result 1152 states and 2296 transitions. [2022-01-18 06:05:35,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-18 06:05:35,684 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:05:35,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:05:35,685 INFO L225 Difference]: With dead ends: 1152 [2022-01-18 06:05:35,685 INFO L226 Difference]: Without dead ends: 1039 [2022-01-18 06:05:35,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5010 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1471, Invalid=14029, Unknown=0, NotChecked=0, Total=15500 [2022-01-18 06:05:35,687 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 337 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 2672 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 2989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 2672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:05:35,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 623 Invalid, 2989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 2672 Invalid, 0 Unknown, 68 Unchecked, 1.1s Time] [2022-01-18 06:05:35,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2022-01-18 06:05:35,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 575. [2022-01-18 06:05:35,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 2.043554006968641) internal successors, (1173), 574 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:35,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1173 transitions. [2022-01-18 06:05:35,693 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1173 transitions. Word has length 33 [2022-01-18 06:05:35,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:05:35,694 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 1173 transitions. [2022-01-18 06:05:35,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:35,694 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1173 transitions. [2022-01-18 06:05:35,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:05:35,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:05:35,694 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:05:35,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-01-18 06:05:35,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-01-18 06:05:35,895 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:05:35,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:05:35,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1704039750, now seen corresponding path program 109 times [2022-01-18 06:05:35,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:05:35,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696685478] [2022-01-18 06:05:35,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:05:35,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:05:35,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:05:36,142 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:36,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:05:36,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696685478] [2022-01-18 06:05:36,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696685478] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:05:36,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946615211] [2022-01-18 06:05:36,142 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:05:36,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:05:36,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:05:36,143 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:05:36,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-01-18 06:05:36,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:05:36,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:05:36,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:05:36,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:05:36,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:05:36,461 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 27 treesize of output 13 [2022-01-18 06:05:36,624 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:36,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:05:37,033 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:05:37,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:05:37,090 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:37,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946615211] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:05:37,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:05:37,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:05:37,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101088678] [2022-01-18 06:05:37,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:05:37,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:05:37,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:05:37,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:05:37,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1460, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:05:37,091 INFO L87 Difference]: Start difference. First operand 575 states and 1173 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:39,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:05:39,904 INFO L93 Difference]: Finished difference Result 1057 states and 2120 transitions. [2022-01-18 06:05:39,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 06:05:39,905 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:05:39,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:05:39,906 INFO L225 Difference]: With dead ends: 1057 [2022-01-18 06:05:39,906 INFO L226 Difference]: Without dead ends: 1029 [2022-01-18 06:05:39,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3217 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1101, Invalid=9405, Unknown=0, NotChecked=0, Total=10506 [2022-01-18 06:05:39,906 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 272 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:05:39,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 384 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1517 Invalid, 0 Unknown, 73 Unchecked, 0.6s Time] [2022-01-18 06:05:39,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2022-01-18 06:05:39,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 574. [2022-01-18 06:05:39,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 2.043630017452007) internal successors, (1171), 573 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:39,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1171 transitions. [2022-01-18 06:05:39,912 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1171 transitions. Word has length 33 [2022-01-18 06:05:39,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:05:39,912 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 1171 transitions. [2022-01-18 06:05:39,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:39,912 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1171 transitions. [2022-01-18 06:05:39,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:05:39,913 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:05:39,913 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:05:39,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-01-18 06:05:40,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:05:40,115 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:05:40,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:05:40,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1781141418, now seen corresponding path program 110 times [2022-01-18 06:05:40,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:05:40,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568588099] [2022-01-18 06:05:40,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:05:40,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:05:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:05:40,366 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:40,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:05:40,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568588099] [2022-01-18 06:05:40,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568588099] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:05:40,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379244547] [2022-01-18 06:05:40,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:05:40,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:05:40,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:05:40,367 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:05:40,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-01-18 06:05:40,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:05:40,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:05:40,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:05:40,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:05:40,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:05:40,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:05:40,672 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 27 treesize of output 13 [2022-01-18 06:05:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:40,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:05:41,283 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:05:41,283 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 42 treesize of output 60 [2022-01-18 06:05:41,340 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:41,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379244547] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:05:41,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:05:41,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:05:41,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339956137] [2022-01-18 06:05:41,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:05:41,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:05:41,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:05:41,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:05:41,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1457, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:05:41,341 INFO L87 Difference]: Start difference. First operand 574 states and 1171 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:44,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:05:44,307 INFO L93 Difference]: Finished difference Result 1188 states and 2369 transitions. [2022-01-18 06:05:44,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 06:05:44,308 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:05:44,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:05:44,309 INFO L225 Difference]: With dead ends: 1188 [2022-01-18 06:05:44,309 INFO L226 Difference]: Without dead ends: 1132 [2022-01-18 06:05:44,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3921 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1268, Invalid=11388, Unknown=0, NotChecked=0, Total=12656 [2022-01-18 06:05:44,310 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 318 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 1895 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 2247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:05:44,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 484 Invalid, 2247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1895 Invalid, 0 Unknown, 175 Unchecked, 0.7s Time] [2022-01-18 06:05:44,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2022-01-18 06:05:44,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 579. [2022-01-18 06:05:44,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 2.046712802768166) internal successors, (1183), 578 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:44,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 1183 transitions. [2022-01-18 06:05:44,317 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 1183 transitions. Word has length 33 [2022-01-18 06:05:44,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:05:44,317 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 1183 transitions. [2022-01-18 06:05:44,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:44,317 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 1183 transitions. [2022-01-18 06:05:44,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:05:44,317 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:05:44,317 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:05:44,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-01-18 06:05:44,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:05:44,518 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:05:44,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:05:44,519 INFO L85 PathProgramCache]: Analyzing trace with hash -785128862, now seen corresponding path program 111 times [2022-01-18 06:05:44,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:05:44,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130220303] [2022-01-18 06:05:44,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:05:44,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:05:44,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:05:44,789 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:44,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:05:44,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130220303] [2022-01-18 06:05:44,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130220303] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:05:44,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862476180] [2022-01-18 06:05:44,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:05:44,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:05:44,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:05:44,790 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:05:44,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-01-18 06:05:44,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:05:44,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:05:44,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:05:44,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:05:45,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:05:45,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:05:45,085 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 27 treesize of output 13 [2022-01-18 06:05:45,287 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:45,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:05:45,671 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:05:45,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:05:45,716 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:45,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862476180] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:05:45,717 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:05:45,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:05:45,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705501353] [2022-01-18 06:05:45,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:05:45,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:05:45,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:05:45,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:05:45,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:05:45,718 INFO L87 Difference]: Start difference. First operand 579 states and 1183 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:48,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:05:48,412 INFO L93 Difference]: Finished difference Result 1103 states and 2209 transitions. [2022-01-18 06:05:48,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-18 06:05:48,413 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:05:48,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:05:48,414 INFO L225 Difference]: With dead ends: 1103 [2022-01-18 06:05:48,414 INFO L226 Difference]: Without dead ends: 1039 [2022-01-18 06:05:48,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3254 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1048, Invalid=9872, Unknown=0, NotChecked=0, Total=10920 [2022-01-18 06:05:48,414 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 259 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 2419 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 2797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 2419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:05:48,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 493 Invalid, 2797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 2419 Invalid, 0 Unknown, 192 Unchecked, 0.9s Time] [2022-01-18 06:05:48,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2022-01-18 06:05:48,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 601. [2022-01-18 06:05:48,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 600 states have (on average 2.0433333333333334) internal successors, (1226), 600 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:48,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 1226 transitions. [2022-01-18 06:05:48,421 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 1226 transitions. Word has length 33 [2022-01-18 06:05:48,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:05:48,421 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 1226 transitions. [2022-01-18 06:05:48,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:48,421 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 1226 transitions. [2022-01-18 06:05:48,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:05:48,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:05:48,421 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:05:48,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-01-18 06:05:48,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-01-18 06:05:48,639 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:05:48,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:05:48,640 INFO L85 PathProgramCache]: Analyzing trace with hash 641113504, now seen corresponding path program 112 times [2022-01-18 06:05:48,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:05:48,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792845011] [2022-01-18 06:05:48,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:05:48,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:05:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:05:48,905 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:48,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:05:48,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792845011] [2022-01-18 06:05:48,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792845011] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:05:48,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814149758] [2022-01-18 06:05:48,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:05:48,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:05:48,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:05:48,906 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:05:48,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-01-18 06:05:48,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:05:48,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:05:48,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:05:48,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:05:49,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:05:49,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:05:49,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 06:05:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:49,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:05:49,772 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:05:49,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:05:49,819 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:49,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814149758] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:05:49,819 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:05:49,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:05:49,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72510993] [2022-01-18 06:05:49,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:05:49,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:05:49,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:05:49,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:05:49,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1458, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:05:49,820 INFO L87 Difference]: Start difference. First operand 601 states and 1226 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:53,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:05:53,472 INFO L93 Difference]: Finished difference Result 1153 states and 2288 transitions. [2022-01-18 06:05:53,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-18 06:05:53,472 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:05:53,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:05:53,474 INFO L225 Difference]: With dead ends: 1153 [2022-01-18 06:05:53,474 INFO L226 Difference]: Without dead ends: 1069 [2022-01-18 06:05:53,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5495 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1663, Invalid=15629, Unknown=0, NotChecked=0, Total=17292 [2022-01-18 06:05:53,475 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 376 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 2331 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 2695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 2331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:05:53,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 402 Invalid, 2695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 2331 Invalid, 0 Unknown, 134 Unchecked, 0.9s Time] [2022-01-18 06:05:53,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2022-01-18 06:05:53,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 611. [2022-01-18 06:05:53,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 610 states have (on average 2.040983606557377) internal successors, (1245), 610 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:53,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 1245 transitions. [2022-01-18 06:05:53,482 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 1245 transitions. Word has length 33 [2022-01-18 06:05:53,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:05:53,482 INFO L470 AbstractCegarLoop]: Abstraction has 611 states and 1245 transitions. [2022-01-18 06:05:53,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:53,482 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1245 transitions. [2022-01-18 06:05:53,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:05:53,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:05:53,482 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:05:53,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-01-18 06:05:53,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:05:53,683 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:05:53,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:05:53,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1676294800, now seen corresponding path program 113 times [2022-01-18 06:05:53,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:05:53,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235839463] [2022-01-18 06:05:53,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:05:53,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:05:53,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:05:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:53,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:05:53,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235839463] [2022-01-18 06:05:53,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235839463] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:05:53,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661360952] [2022-01-18 06:05:53,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:05:53,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:05:53,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:05:53,953 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:05:53,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-01-18 06:05:53,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:05:53,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:05:53,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 06:05:53,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:05:54,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:05:54,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:05:54,234 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 06:05:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:54,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:05:54,834 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:05:54,834 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 42 treesize of output 60 [2022-01-18 06:05:54,878 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:54,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661360952] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:05:54,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:05:54,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:05:54,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394032476] [2022-01-18 06:05:54,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:05:54,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:05:54,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:05:54,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:05:54,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:05:54,879 INFO L87 Difference]: Start difference. First operand 611 states and 1245 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:58,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:05:58,093 INFO L93 Difference]: Finished difference Result 1094 states and 2178 transitions. [2022-01-18 06:05:58,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-18 06:05:58,093 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:05:58,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:05:58,094 INFO L225 Difference]: With dead ends: 1094 [2022-01-18 06:05:58,094 INFO L226 Difference]: Without dead ends: 1010 [2022-01-18 06:05:58,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3969 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1266, Invalid=12306, Unknown=0, NotChecked=0, Total=13572 [2022-01-18 06:05:58,095 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 334 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 2389 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 2704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 2389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:05:58,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 450 Invalid, 2704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 2389 Invalid, 0 Unknown, 146 Unchecked, 0.9s Time] [2022-01-18 06:05:58,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2022-01-18 06:05:58,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 619. [2022-01-18 06:05:58,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 2.0388349514563107) internal successors, (1260), 618 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:58,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1260 transitions. [2022-01-18 06:05:58,101 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1260 transitions. Word has length 33 [2022-01-18 06:05:58,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:05:58,101 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 1260 transitions. [2022-01-18 06:05:58,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:58,101 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1260 transitions. [2022-01-18 06:05:58,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:05:58,102 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:05:58,102 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:05:58,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-01-18 06:05:58,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:05:58,303 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:05:58,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:05:58,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1392173570, now seen corresponding path program 114 times [2022-01-18 06:05:58,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:05:58,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661151617] [2022-01-18 06:05:58,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:05:58,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:05:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:05:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:58,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:05:58,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661151617] [2022-01-18 06:05:58,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661151617] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:05:58,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035771461] [2022-01-18 06:05:58,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:05:58,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:05:58,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:05:58,586 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:05:58,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-01-18 06:05:58,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:05:58,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:05:58,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:05:58,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:05:59,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:05:59,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:05:59,050 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 06:05:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:59,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:05:59,661 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:05:59,661 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 47 treesize of output 63 [2022-01-18 06:05:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:59,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035771461] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:05:59,714 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:05:59,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-01-18 06:05:59,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755668986] [2022-01-18 06:05:59,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:05:59,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 06:05:59,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:05:59,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 06:05:59,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1763, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 06:05:59,715 INFO L87 Difference]: Start difference. First operand 619 states and 1260 transitions. Second operand has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:01,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:06:01,882 INFO L93 Difference]: Finished difference Result 968 states and 1927 transitions. [2022-01-18 06:06:01,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 06:06:01,882 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:06:01,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:06:01,883 INFO L225 Difference]: With dead ends: 968 [2022-01-18 06:06:01,883 INFO L226 Difference]: Without dead ends: 935 [2022-01-18 06:06:01,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 36 SyntacticMatches, 11 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2907 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=774, Invalid=7968, Unknown=0, NotChecked=0, Total=8742 [2022-01-18 06:06:01,885 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 186 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 1953 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:06:01,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 488 Invalid, 2211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1953 Invalid, 0 Unknown, 176 Unchecked, 0.7s Time] [2022-01-18 06:06:01,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2022-01-18 06:06:01,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 638. [2022-01-18 06:06:01,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 2.0313971742543173) internal successors, (1294), 637 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:01,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1294 transitions. [2022-01-18 06:06:01,893 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1294 transitions. Word has length 33 [2022-01-18 06:06:01,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:06:01,893 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1294 transitions. [2022-01-18 06:06:01,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:01,893 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1294 transitions. [2022-01-18 06:06:01,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:06:01,894 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:06:01,894 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:06:01,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-01-18 06:06:02,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-01-18 06:06:02,094 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:06:02,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:06:02,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1427176148, now seen corresponding path program 115 times [2022-01-18 06:06:02,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:06:02,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733310930] [2022-01-18 06:06:02,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:06:02,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:06:02,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:06:02,349 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:02,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:06:02,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733310930] [2022-01-18 06:06:02,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733310930] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:06:02,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483212111] [2022-01-18 06:06:02,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:06:02,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:06:02,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:06:02,351 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:06:02,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-01-18 06:06:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:06:02,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:06:02,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:06:02,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:02,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:06:02,728 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 27 treesize of output 13 [2022-01-18 06:06:02,872 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:02,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:06:03,290 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:06:03,290 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 42 treesize of output 60 [2022-01-18 06:06:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:03,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483212111] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:06:03,335 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:06:03,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:06:03,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878907033] [2022-01-18 06:06:03,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:06:03,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:06:03,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:06:03,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:06:03,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:06:03,336 INFO L87 Difference]: Start difference. First operand 638 states and 1294 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:05,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:06:05,412 INFO L93 Difference]: Finished difference Result 995 states and 1973 transitions. [2022-01-18 06:06:05,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 06:06:05,412 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:06:05,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:06:05,413 INFO L225 Difference]: With dead ends: 995 [2022-01-18 06:06:05,414 INFO L226 Difference]: Without dead ends: 897 [2022-01-18 06:06:05,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 40 SyntacticMatches, 10 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2457 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=698, Invalid=7492, Unknown=0, NotChecked=0, Total=8190 [2022-01-18 06:06:05,415 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 199 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1869 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 2344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 394 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:06:05,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 485 Invalid, 2344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1869 Invalid, 0 Unknown, 394 Unchecked, 0.7s Time] [2022-01-18 06:06:05,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-01-18 06:06:05,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 623. [2022-01-18 06:06:05,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 622 states have (on average 2.036977491961415) internal successors, (1267), 622 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:05,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 1267 transitions. [2022-01-18 06:06:05,421 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 1267 transitions. Word has length 33 [2022-01-18 06:06:05,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:06:05,421 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 1267 transitions. [2022-01-18 06:06:05,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:05,421 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 1267 transitions. [2022-01-18 06:06:05,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:06:05,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:06:05,422 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:06:05,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-01-18 06:06:05,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:06:05,623 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:06:05,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:06:05,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1435416782, now seen corresponding path program 116 times [2022-01-18 06:06:05,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:06:05,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437852137] [2022-01-18 06:06:05,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:06:05,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:06:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:06:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:05,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:06:05,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437852137] [2022-01-18 06:06:05,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437852137] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:06:05,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177855234] [2022-01-18 06:06:05,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:06:05,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:06:05,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:06:05,873 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:06:05,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-01-18 06:06:05,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:06:05,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:06:05,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:06:05,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:06:06,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:06,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:06:06,255 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 27 treesize of output 13 [2022-01-18 06:06:06,387 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:06,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:06:06,772 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:06:06,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:06:06,833 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:06,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177855234] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:06:06,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:06:06,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:06:06,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65460605] [2022-01-18 06:06:06,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:06:06,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:06:06,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:06:06,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:06:06,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1473, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:06:06,834 INFO L87 Difference]: Start difference. First operand 623 states and 1267 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:08,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:06:08,664 INFO L93 Difference]: Finished difference Result 1006 states and 2022 transitions. [2022-01-18 06:06:08,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 06:06:08,666 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:06:08,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:06:08,667 INFO L225 Difference]: With dead ends: 1006 [2022-01-18 06:06:08,667 INFO L226 Difference]: Without dead ends: 970 [2022-01-18 06:06:08,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 39 SyntacticMatches, 9 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2402 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=685, Invalid=7147, Unknown=0, NotChecked=0, Total=7832 [2022-01-18 06:06:08,668 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 199 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1364 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 1889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 440 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:06:08,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 370 Invalid, 1889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1364 Invalid, 0 Unknown, 440 Unchecked, 0.5s Time] [2022-01-18 06:06:08,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2022-01-18 06:06:08,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 619. [2022-01-18 06:06:08,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 2.033980582524272) internal successors, (1257), 618 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:08,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1257 transitions. [2022-01-18 06:06:08,675 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1257 transitions. Word has length 33 [2022-01-18 06:06:08,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:06:08,675 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 1257 transitions. [2022-01-18 06:06:08,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:08,675 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1257 transitions. [2022-01-18 06:06:08,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:06:08,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:06:08,676 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:06:08,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-01-18 06:06:08,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:06:08,876 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:06:08,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:06:08,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1679711078, now seen corresponding path program 117 times [2022-01-18 06:06:08,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:06:08,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396187054] [2022-01-18 06:06:08,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:06:08,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:06:08,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:06:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:09,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:06:09,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396187054] [2022-01-18 06:06:09,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396187054] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:06:09,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587630295] [2022-01-18 06:06:09,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:06:09,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:06:09,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:06:09,136 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:06:09,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-01-18 06:06:09,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:06:09,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:06:09,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:06:09,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:06:09,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:09,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:06:09,515 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 27 treesize of output 13 [2022-01-18 06:06:09,654 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:09,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:06:10,066 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:06:10,066 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 42 treesize of output 60 [2022-01-18 06:06:10,117 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:10,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587630295] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:06:10,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:06:10,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:06:10,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610676998] [2022-01-18 06:06:10,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:06:10,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:06:10,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:06:10,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:06:10,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:06:10,118 INFO L87 Difference]: Start difference. First operand 619 states and 1257 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:14,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:06:14,070 INFO L93 Difference]: Finished difference Result 1196 states and 2379 transitions. [2022-01-18 06:06:14,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-18 06:06:14,070 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:06:14,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:06:14,071 INFO L225 Difference]: With dead ends: 1196 [2022-01-18 06:06:14,071 INFO L226 Difference]: Without dead ends: 1129 [2022-01-18 06:06:14,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 44 SyntacticMatches, 14 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6916 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1387, Invalid=17795, Unknown=0, NotChecked=0, Total=19182 [2022-01-18 06:06:14,073 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 295 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 2375 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 2984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 2375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 460 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:06:14,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 490 Invalid, 2984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 2375 Invalid, 0 Unknown, 460 Unchecked, 0.9s Time] [2022-01-18 06:06:14,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2022-01-18 06:06:14,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 671. [2022-01-18 06:06:14,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 2.0283582089552237) internal successors, (1359), 670 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:14,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1359 transitions. [2022-01-18 06:06:14,079 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1359 transitions. Word has length 33 [2022-01-18 06:06:14,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:06:14,080 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 1359 transitions. [2022-01-18 06:06:14,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:14,080 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1359 transitions. [2022-01-18 06:06:14,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:06:14,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:06:14,080 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:06:14,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-01-18 06:06:14,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-01-18 06:06:14,281 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:06:14,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:06:14,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1410568192, now seen corresponding path program 118 times [2022-01-18 06:06:14,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:06:14,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599301611] [2022-01-18 06:06:14,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:06:14,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:06:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:06:14,534 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:14,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:06:14,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599301611] [2022-01-18 06:06:14,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599301611] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:06:14,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104061213] [2022-01-18 06:06:14,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:06:14,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:06:14,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:06:14,535 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:06:14,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-01-18 06:06:14,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:06:14,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:06:14,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:06:14,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:06:14,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:14,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:06:14,891 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 27 treesize of output 13 [2022-01-18 06:06:15,049 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:15,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:06:15,465 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:06:15,465 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 42 treesize of output 60 [2022-01-18 06:06:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:15,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104061213] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:06:15,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:06:15,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:06:15,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154676281] [2022-01-18 06:06:15,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:06:15,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:06:15,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:06:15,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:06:15,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:06:15,517 INFO L87 Difference]: Start difference. First operand 671 states and 1359 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:20,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:06:20,524 INFO L93 Difference]: Finished difference Result 1327 states and 2613 transitions. [2022-01-18 06:06:20,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-18 06:06:20,524 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:06:20,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:06:20,526 INFO L225 Difference]: With dead ends: 1327 [2022-01-18 06:06:20,526 INFO L226 Difference]: Without dead ends: 1200 [2022-01-18 06:06:20,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8265 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1775, Invalid=22095, Unknown=0, NotChecked=0, Total=23870 [2022-01-18 06:06:20,528 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 349 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 3518 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 3896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 3518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:06:20,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 734 Invalid, 3896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 3518 Invalid, 0 Unknown, 197 Unchecked, 1.4s Time] [2022-01-18 06:06:20,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2022-01-18 06:06:20,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 663. [2022-01-18 06:06:20,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 2.027190332326284) internal successors, (1342), 662 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:20,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1342 transitions. [2022-01-18 06:06:20,536 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1342 transitions. Word has length 33 [2022-01-18 06:06:20,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:06:20,536 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 1342 transitions. [2022-01-18 06:06:20,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:20,536 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1342 transitions. [2022-01-18 06:06:20,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:06:20,537 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:06:20,537 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:06:20,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-01-18 06:06:20,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:06:20,737 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:06:20,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:06:20,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1038600488, now seen corresponding path program 119 times [2022-01-18 06:06:20,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:06:20,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309157292] [2022-01-18 06:06:20,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:06:20,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:06:20,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:06:20,999 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:20,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:06:20,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309157292] [2022-01-18 06:06:20,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309157292] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:06:20,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377249877] [2022-01-18 06:06:21,000 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:06:21,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:06:21,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:06:21,001 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:06:21,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-01-18 06:06:21,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:06:21,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:06:21,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 06:06:21,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:06:21,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:06:21,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:21,313 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 27 treesize of output 13 [2022-01-18 06:06:21,509 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:21,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:06:22,050 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:06:22,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 63 [2022-01-18 06:06:22,106 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:22,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377249877] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:06:22,106 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:06:22,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-01-18 06:06:22,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099105069] [2022-01-18 06:06:22,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:06:22,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 06:06:22,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:06:22,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 06:06:22,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 06:06:22,107 INFO L87 Difference]: Start difference. First operand 663 states and 1342 transitions. Second operand has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:29,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:06:29,157 INFO L93 Difference]: Finished difference Result 1281 states and 2543 transitions. [2022-01-18 06:06:29,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-18 06:06:29,157 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:06:29,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:06:29,159 INFO L225 Difference]: With dead ends: 1281 [2022-01-18 06:06:29,159 INFO L226 Difference]: Without dead ends: 1217 [2022-01-18 06:06:29,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9595 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1969, Invalid=24763, Unknown=0, NotChecked=0, Total=26732 [2022-01-18 06:06:29,161 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 340 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 3772 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 4360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 3772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 398 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:06:29,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 601 Invalid, 4360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 3772 Invalid, 0 Unknown, 398 Unchecked, 1.6s Time] [2022-01-18 06:06:29,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2022-01-18 06:06:29,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 668. [2022-01-18 06:06:29,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 2.028485757121439) internal successors, (1353), 667 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:29,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1353 transitions. [2022-01-18 06:06:29,169 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1353 transitions. Word has length 33 [2022-01-18 06:06:29,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:06:29,169 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 1353 transitions. [2022-01-18 06:06:29,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:29,169 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1353 transitions. [2022-01-18 06:06:29,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:06:29,169 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:06:29,170 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:06:29,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-01-18 06:06:29,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-01-18 06:06:29,385 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:06:29,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:06:29,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1830124442, now seen corresponding path program 120 times [2022-01-18 06:06:29,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:06:29,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420175445] [2022-01-18 06:06:29,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:06:29,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:06:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:06:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:29,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:06:29,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420175445] [2022-01-18 06:06:29,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420175445] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:06:29,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318031077] [2022-01-18 06:06:29,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:06:29,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:06:29,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:06:29,650 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:06:29,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-01-18 06:06:29,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:06:29,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:06:29,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 06:06:29,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:06:29,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:06:29,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:06:29,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:29,972 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 06:06:30,153 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:30,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:06:30,559 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:06:30,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:06:30,607 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:30,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318031077] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:06:30,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:06:30,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:06:30,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993489216] [2022-01-18 06:06:30,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:06:30,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:06:30,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:06:30,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:06:30,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:06:30,609 INFO L87 Difference]: Start difference. First operand 668 states and 1353 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:37,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:06:37,261 INFO L93 Difference]: Finished difference Result 1461 states and 2885 transitions. [2022-01-18 06:06:37,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-01-18 06:06:37,261 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:06:37,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:06:37,263 INFO L225 Difference]: With dead ends: 1461 [2022-01-18 06:06:37,263 INFO L226 Difference]: Without dead ends: 1361 [2022-01-18 06:06:37,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10672 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2766, Invalid=26646, Unknown=0, NotChecked=0, Total=29412 [2022-01-18 06:06:37,266 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 421 mSDsluCounter, 1534 mSDsCounter, 0 mSdLazyCounter, 4097 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 4936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 4097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 538 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:06:37,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 928 Invalid, 4936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 4097 Invalid, 0 Unknown, 538 Unchecked, 1.6s Time] [2022-01-18 06:06:37,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2022-01-18 06:06:37,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 730. [2022-01-18 06:06:37,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 2.0205761316872426) internal successors, (1473), 729 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:37,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1473 transitions. [2022-01-18 06:06:37,275 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1473 transitions. Word has length 33 [2022-01-18 06:06:37,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:06:37,296 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 1473 transitions. [2022-01-18 06:06:37,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:37,297 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1473 transitions. [2022-01-18 06:06:37,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:06:37,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:06:37,297 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:06:37,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-01-18 06:06:37,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-01-18 06:06:37,498 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:06:37,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:06:37,498 INFO L85 PathProgramCache]: Analyzing trace with hash -456720104, now seen corresponding path program 121 times [2022-01-18 06:06:37,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:06:37,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048914581] [2022-01-18 06:06:37,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:06:37,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:06:37,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:06:37,771 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:37,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:06:37,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048914581] [2022-01-18 06:06:37,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048914581] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:06:37,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292339635] [2022-01-18 06:06:37,772 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:06:37,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:06:37,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:06:37,773 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:06:37,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-01-18 06:06:37,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:06:37,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:06:37,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:06:38,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:06:38,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:38,104 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 27 treesize of output 13 [2022-01-18 06:06:38,284 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:38,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:06:38,734 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:06:38,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:06:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:38,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292339635] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:06:38,794 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:06:38,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:06:38,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288427986] [2022-01-18 06:06:38,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:06:38,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:06:38,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:06:38,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:06:38,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:06:38,795 INFO L87 Difference]: Start difference. First operand 730 states and 1473 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:43,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:06:43,990 INFO L93 Difference]: Finished difference Result 1337 states and 2659 transitions. [2022-01-18 06:06:43,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-18 06:06:43,990 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:06:43,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:06:43,992 INFO L225 Difference]: With dead ends: 1337 [2022-01-18 06:06:43,992 INFO L226 Difference]: Without dead ends: 1281 [2022-01-18 06:06:43,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7430 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2074, Invalid=19388, Unknown=0, NotChecked=0, Total=21462 [2022-01-18 06:06:43,993 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 363 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 2788 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 3680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 2788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 597 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:06:43,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 566 Invalid, 3680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 2788 Invalid, 0 Unknown, 597 Unchecked, 1.2s Time] [2022-01-18 06:06:43,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2022-01-18 06:06:43,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 694. [2022-01-18 06:06:44,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 693 states have (on average 2.0274170274170276) internal successors, (1405), 693 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:44,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1405 transitions. [2022-01-18 06:06:44,001 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1405 transitions. Word has length 33 [2022-01-18 06:06:44,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:06:44,001 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 1405 transitions. [2022-01-18 06:06:44,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:44,001 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1405 transitions. [2022-01-18 06:06:44,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:06:44,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:06:44,002 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:06:44,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-01-18 06:06:44,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-01-18 06:06:44,220 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:06:44,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:06:44,220 INFO L85 PathProgramCache]: Analyzing trace with hash -101427426, now seen corresponding path program 122 times [2022-01-18 06:06:44,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:06:44,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275589392] [2022-01-18 06:06:44,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:06:44,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:06:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:06:44,486 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:44,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:06:44,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275589392] [2022-01-18 06:06:44,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275589392] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:06:44,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776397166] [2022-01-18 06:06:44,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:06:44,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:06:44,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:06:44,488 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:06:44,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-01-18 06:06:44,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:06:44,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:06:44,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:06:44,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:06:44,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:44,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:06:44,774 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 27 treesize of output 13 [2022-01-18 06:06:44,965 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:44,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:06:45,356 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:06:45,356 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 42 treesize of output 60 [2022-01-18 06:06:45,401 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:45,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776397166] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:06:45,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:06:45,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:06:45,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593141487] [2022-01-18 06:06:45,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:06:45,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:06:45,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:06:45,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:06:45,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:06:45,402 INFO L87 Difference]: Start difference. First operand 694 states and 1405 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:50,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:06:50,085 INFO L93 Difference]: Finished difference Result 1283 states and 2512 transitions. [2022-01-18 06:06:50,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-18 06:06:50,086 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:06:50,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:06:50,087 INFO L225 Difference]: With dead ends: 1283 [2022-01-18 06:06:50,087 INFO L226 Difference]: Without dead ends: 1178 [2022-01-18 06:06:50,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7471 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1728, Invalid=20028, Unknown=0, NotChecked=0, Total=21756 [2022-01-18 06:06:50,088 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 349 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 3496 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 3701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 3496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:06:50,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 603 Invalid, 3701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 3496 Invalid, 0 Unknown, 11 Unchecked, 1.4s Time] [2022-01-18 06:06:50,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2022-01-18 06:06:50,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 706. [2022-01-18 06:06:50,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 2.022695035460993) internal successors, (1426), 705 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:50,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1426 transitions. [2022-01-18 06:06:50,096 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1426 transitions. Word has length 33 [2022-01-18 06:06:50,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:06:50,096 INFO L470 AbstractCegarLoop]: Abstraction has 706 states and 1426 transitions. [2022-01-18 06:06:50,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:50,096 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1426 transitions. [2022-01-18 06:06:50,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:06:50,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:06:50,097 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:06:50,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-01-18 06:06:50,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:06:50,303 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:06:50,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:06:50,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1324814940, now seen corresponding path program 123 times [2022-01-18 06:06:50,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:06:50,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397178251] [2022-01-18 06:06:50,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:06:50,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:06:50,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:06:50,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:50,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:06:50,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397178251] [2022-01-18 06:06:50,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397178251] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:06:50,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893298222] [2022-01-18 06:06:50,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:06:50,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:06:50,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:06:50,576 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:06:50,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-01-18 06:06:50,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:06:50,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:06:50,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:06:50,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:06:50,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:06:50,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:50,867 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 27 treesize of output 13 [2022-01-18 06:06:51,057 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:51,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:06:51,484 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:06:51,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:06:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:51,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893298222] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:06:51,543 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:06:51,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:06:51,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210969544] [2022-01-18 06:06:51,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:06:51,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:06:51,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:06:51,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:06:51,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:06:51,544 INFO L87 Difference]: Start difference. First operand 706 states and 1426 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:57,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:06:57,605 INFO L93 Difference]: Finished difference Result 1306 states and 2578 transitions. [2022-01-18 06:06:57,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-01-18 06:06:57,605 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:06:57,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:06:57,607 INFO L225 Difference]: With dead ends: 1306 [2022-01-18 06:06:57,607 INFO L226 Difference]: Without dead ends: 1238 [2022-01-18 06:06:57,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10719 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2619, Invalid=27483, Unknown=0, NotChecked=0, Total=30102 [2022-01-18 06:06:57,608 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 405 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 3158 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 3513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 3158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:06:57,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 453 Invalid, 3513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 3158 Invalid, 0 Unknown, 89 Unchecked, 1.3s Time] [2022-01-18 06:06:57,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2022-01-18 06:06:57,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 716. [2022-01-18 06:06:57,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.018181818181818) internal successors, (1443), 715 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:57,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1443 transitions. [2022-01-18 06:06:57,616 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1443 transitions. Word has length 33 [2022-01-18 06:06:57,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:06:57,616 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 1443 transitions. [2022-01-18 06:06:57,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:57,616 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1443 transitions. [2022-01-18 06:06:57,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:06:57,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:06:57,617 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:06:57,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-01-18 06:06:57,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:06:57,819 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:06:57,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:06:57,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1934971060, now seen corresponding path program 124 times [2022-01-18 06:06:57,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:06:57,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688905585] [2022-01-18 06:06:57,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:06:57,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:06:57,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:06:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:58,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:06:58,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688905585] [2022-01-18 06:06:58,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688905585] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:06:58,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32692683] [2022-01-18 06:06:58,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:06:58,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:06:58,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:06:58,080 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:06:58,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-01-18 06:06:58,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:06:58,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:06:58,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:06:58,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:06:58,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:06:58,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:06:58,369 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 27 treesize of output 13 [2022-01-18 06:06:58,559 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:58,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:06:58,979 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:06:58,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:06:59,033 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:59,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32692683] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:06:59,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:06:59,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 06:06:59,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388710582] [2022-01-18 06:06:59,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:06:59,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:06:59,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:06:59,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:06:59,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:06:59,034 INFO L87 Difference]: Start difference. First operand 716 states and 1443 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:03,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:07:03,552 INFO L93 Difference]: Finished difference Result 1257 states and 2482 transitions. [2022-01-18 06:07:03,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-18 06:07:03,553 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:07:03,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:07:03,554 INFO L225 Difference]: With dead ends: 1257 [2022-01-18 06:07:03,554 INFO L226 Difference]: Without dead ends: 1189 [2022-01-18 06:07:03,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7412 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1859, Invalid=20491, Unknown=0, NotChecked=0, Total=22350 [2022-01-18 06:07:03,555 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 328 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 2509 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 2924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 2509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:07:03,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 427 Invalid, 2924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 2509 Invalid, 0 Unknown, 233 Unchecked, 1.0s Time] [2022-01-18 06:07:03,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2022-01-18 06:07:03,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 723. [2022-01-18 06:07:03,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 2.0166204986149583) internal successors, (1456), 722 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:03,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1456 transitions. [2022-01-18 06:07:03,562 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1456 transitions. Word has length 33 [2022-01-18 06:07:03,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:07:03,562 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 1456 transitions. [2022-01-18 06:07:03,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:03,562 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1456 transitions. [2022-01-18 06:07:03,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:07:03,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:07:03,563 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:07:03,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-01-18 06:07:03,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-01-18 06:07:03,764 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:07:03,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:07:03,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1614609616, now seen corresponding path program 125 times [2022-01-18 06:07:03,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:07:03,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810020900] [2022-01-18 06:07:03,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:07:03,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:07:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:07:04,027 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:04,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:07:04,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810020900] [2022-01-18 06:07:04,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810020900] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:07:04,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114874550] [2022-01-18 06:07:04,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:07:04,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:07:04,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:07:04,028 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:07:04,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-01-18 06:07:04,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 06:07:04,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:07:04,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 06:07:04,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:07:04,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:07:04,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:07:04,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:07:04,448 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 06:07:04,592 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:04,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:07:04,994 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:07:04,994 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 42 treesize of output 60 [2022-01-18 06:07:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:05,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114874550] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:07:05,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:07:05,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:07:05,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621999114] [2022-01-18 06:07:05,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:07:05,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:07:05,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:07:05,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:07:05,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1561, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:07:05,050 INFO L87 Difference]: Start difference. First operand 723 states and 1456 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:06,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:07:06,421 INFO L93 Difference]: Finished difference Result 1091 states and 2133 transitions. [2022-01-18 06:07:06,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 06:07:06,421 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:07:06,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:07:06,422 INFO L225 Difference]: With dead ends: 1091 [2022-01-18 06:07:06,422 INFO L226 Difference]: Without dead ends: 1027 [2022-01-18 06:07:06,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 12 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1517 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=396, Invalid=4716, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 06:07:06,423 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 147 mSDsluCounter, 1200 mSDsCounter, 0 mSdLazyCounter, 1632 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:07:06,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 850 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1632 Invalid, 0 Unknown, 208 Unchecked, 0.6s Time] [2022-01-18 06:07:06,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2022-01-18 06:07:06,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 738. [2022-01-18 06:07:06,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 2.020352781546811) internal successors, (1489), 737 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:06,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1489 transitions. [2022-01-18 06:07:06,430 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1489 transitions. Word has length 33 [2022-01-18 06:07:06,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:07:06,430 INFO L470 AbstractCegarLoop]: Abstraction has 738 states and 1489 transitions. [2022-01-18 06:07:06,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:06,430 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1489 transitions. [2022-01-18 06:07:06,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:07:06,430 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:07:06,430 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:07:06,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-01-18 06:07:06,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable130 [2022-01-18 06:07:06,631 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:07:06,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:07:06,631 INFO L85 PathProgramCache]: Analyzing trace with hash -60860770, now seen corresponding path program 126 times [2022-01-18 06:07:06,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:07:06,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475523129] [2022-01-18 06:07:06,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:07:06,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:07:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:07:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:06,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:07:06,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475523129] [2022-01-18 06:07:06,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475523129] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:07:06,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999239630] [2022-01-18 06:07:06,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:07:06,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:07:06,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:07:06,890 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:07:06,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-01-18 06:07:06,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 06:07:06,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:07:06,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 06:07:06,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:07:07,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:07:07,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:07:07,311 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 06:07:07,454 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:07,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:07:07,850 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:07:07,851 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 42 treesize of output 60 [2022-01-18 06:07:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:07,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999239630] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:07:07,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:07:07,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:07:07,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505592416] [2022-01-18 06:07:07,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:07:07,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:07:07,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:07:07,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:07:07,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1561, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:07:07,910 INFO L87 Difference]: Start difference. First operand 738 states and 1489 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:09,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:07:09,164 INFO L93 Difference]: Finished difference Result 1131 states and 2245 transitions. [2022-01-18 06:07:09,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 06:07:09,164 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:07:09,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:07:09,166 INFO L225 Difference]: With dead ends: 1131 [2022-01-18 06:07:09,166 INFO L226 Difference]: Without dead ends: 1124 [2022-01-18 06:07:09,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 38 SyntacticMatches, 12 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=424, Invalid=4832, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 06:07:09,167 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 177 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 394 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:07:09,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 520 Invalid, 1555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1117 Invalid, 0 Unknown, 394 Unchecked, 0.4s Time] [2022-01-18 06:07:09,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2022-01-18 06:07:09,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 754. [2022-01-18 06:07:09,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 2.0212483399734396) internal successors, (1522), 753 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:09,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1522 transitions. [2022-01-18 06:07:09,178 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1522 transitions. Word has length 33 [2022-01-18 06:07:09,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:07:09,178 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1522 transitions. [2022-01-18 06:07:09,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:09,178 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1522 transitions. [2022-01-18 06:07:09,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:07:09,179 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:07:09,179 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:07:09,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-01-18 06:07:09,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:07:09,380 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:07:09,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:07:09,380 INFO L85 PathProgramCache]: Analyzing trace with hash -837246742, now seen corresponding path program 127 times [2022-01-18 06:07:09,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:07:09,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773056802] [2022-01-18 06:07:09,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:07:09,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:07:09,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:07:09,715 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:09,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:07:09,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773056802] [2022-01-18 06:07:09,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773056802] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:07:09,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905869453] [2022-01-18 06:07:09,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:07:09,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:07:09,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:07:09,720 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:07:09,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-01-18 06:07:09,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:07:09,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:07:09,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:07:10,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:07:10,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:07:10,152 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 27 treesize of output 13 [2022-01-18 06:07:10,294 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:10,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:07:10,696 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:07:10,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:07:10,742 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:10,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905869453] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:07:10,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:07:10,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:07:10,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986813292] [2022-01-18 06:07:10,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:07:10,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:07:10,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:07:10,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:07:10,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1561, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:07:10,743 INFO L87 Difference]: Start difference. First operand 754 states and 1522 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:11,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:07:11,934 INFO L93 Difference]: Finished difference Result 1118 states and 2216 transitions. [2022-01-18 06:07:11,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 06:07:11,934 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:07:11,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:07:11,936 INFO L225 Difference]: With dead ends: 1118 [2022-01-18 06:07:11,936 INFO L226 Difference]: Without dead ends: 1086 [2022-01-18 06:07:11,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 39 SyntacticMatches, 12 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=409, Invalid=4703, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 06:07:11,937 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 167 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:07:11,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 437 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1074 Invalid, 0 Unknown, 216 Unchecked, 0.4s Time] [2022-01-18 06:07:11,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2022-01-18 06:07:11,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 761. [2022-01-18 06:07:11,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 2.011842105263158) internal successors, (1529), 760 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:11,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1529 transitions. [2022-01-18 06:07:11,945 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1529 transitions. Word has length 33 [2022-01-18 06:07:11,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:07:11,945 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 1529 transitions. [2022-01-18 06:07:11,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:11,946 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1529 transitions. [2022-01-18 06:07:11,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:07:11,946 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:07:11,946 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:07:11,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-01-18 06:07:12,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:07:12,147 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:07:12,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:07:12,147 INFO L85 PathProgramCache]: Analyzing trace with hash -461564830, now seen corresponding path program 128 times [2022-01-18 06:07:12,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:07:12,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539206314] [2022-01-18 06:07:12,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:07:12,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:07:12,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:07:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:12,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:07:12,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539206314] [2022-01-18 06:07:12,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539206314] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:07:12,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282331573] [2022-01-18 06:07:12,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:07:12,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:07:12,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:07:12,404 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:07:12,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-01-18 06:07:12,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:07:12,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:07:12,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:07:12,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:07:12,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:07:12,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:07:12,816 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 27 treesize of output 13 [2022-01-18 06:07:12,961 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:12,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:07:13,378 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:07:13,379 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 42 treesize of output 60 [2022-01-18 06:07:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:13,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282331573] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:07:13,435 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:07:13,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:07:13,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077450053] [2022-01-18 06:07:13,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:07:13,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:07:13,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:07:13,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:07:13,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1561, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:07:13,436 INFO L87 Difference]: Start difference. First operand 761 states and 1529 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:14,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:07:14,843 INFO L93 Difference]: Finished difference Result 1236 states and 2406 transitions. [2022-01-18 06:07:14,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 06:07:14,844 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:07:14,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:07:14,845 INFO L225 Difference]: With dead ends: 1236 [2022-01-18 06:07:14,845 INFO L226 Difference]: Without dead ends: 1140 [2022-01-18 06:07:14,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 39 SyntacticMatches, 12 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1742 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=449, Invalid=5403, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 06:07:14,846 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 214 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:07:14,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 487 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1253 Invalid, 0 Unknown, 380 Unchecked, 0.5s Time] [2022-01-18 06:07:14,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2022-01-18 06:07:14,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 757. [2022-01-18 06:07:14,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 2.009259259259259) internal successors, (1519), 756 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:14,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1519 transitions. [2022-01-18 06:07:14,853 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1519 transitions. Word has length 33 [2022-01-18 06:07:14,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:07:14,853 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 1519 transitions. [2022-01-18 06:07:14,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:14,853 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1519 transitions. [2022-01-18 06:07:14,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:07:14,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:07:14,853 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:07:14,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-01-18 06:07:15,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-01-18 06:07:15,054 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:07:15,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:07:15,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1803233456, now seen corresponding path program 129 times [2022-01-18 06:07:15,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:07:15,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37848772] [2022-01-18 06:07:15,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:07:15,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:07:15,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:07:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:15,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:07:15,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37848772] [2022-01-18 06:07:15,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37848772] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:07:15,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659817591] [2022-01-18 06:07:15,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:07:15,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:07:15,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:07:15,303 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:07:15,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-01-18 06:07:15,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:07:15,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:07:15,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 06:07:15,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:07:15,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:07:15,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:07:15,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:07:15,707 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 06:07:15,846 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:15,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:07:16,259 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:07:16,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:07:16,319 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:16,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659817591] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:07:16,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:07:16,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:07:16,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863690109] [2022-01-18 06:07:16,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:07:16,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:07:16,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:07:16,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:07:16,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1561, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:07:16,321 INFO L87 Difference]: Start difference. First operand 757 states and 1519 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:17,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:07:17,751 INFO L93 Difference]: Finished difference Result 1127 states and 2221 transitions. [2022-01-18 06:07:17,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 06:07:17,751 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:07:17,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:07:17,753 INFO L225 Difference]: With dead ends: 1127 [2022-01-18 06:07:17,753 INFO L226 Difference]: Without dead ends: 1097 [2022-01-18 06:07:17,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 37 SyntacticMatches, 13 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=435, Invalid=4967, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 06:07:17,753 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 158 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 1313 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 1992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 635 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:07:17,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 592 Invalid, 1992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1313 Invalid, 0 Unknown, 635 Unchecked, 0.5s Time] [2022-01-18 06:07:17,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2022-01-18 06:07:17,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 738. [2022-01-18 06:07:17,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 2.020352781546811) internal successors, (1489), 737 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:17,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1489 transitions. [2022-01-18 06:07:17,760 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1489 transitions. Word has length 33 [2022-01-18 06:07:17,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:07:17,760 INFO L470 AbstractCegarLoop]: Abstraction has 738 states and 1489 transitions. [2022-01-18 06:07:17,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:17,760 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1489 transitions. [2022-01-18 06:07:17,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:07:17,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:07:17,761 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:07:17,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-01-18 06:07:17,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-01-18 06:07:17,961 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:07:17,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:07:17,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1400985966, now seen corresponding path program 130 times [2022-01-18 06:07:17,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:07:17,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962988699] [2022-01-18 06:07:17,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:07:17,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:07:17,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:07:18,237 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:18,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:07:18,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962988699] [2022-01-18 06:07:18,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962988699] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:07:18,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561234567] [2022-01-18 06:07:18,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:07:18,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:07:18,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:07:18,239 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:07:18,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-01-18 06:07:18,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:07:18,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:07:18,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:07:18,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:07:18,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:07:18,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:07:18,683 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 27 treesize of output 13 [2022-01-18 06:07:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:18,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:07:19,248 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:07:19,248 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 42 treesize of output 60 [2022-01-18 06:07:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:19,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561234567] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:07:19,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:07:19,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:07:19,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159225047] [2022-01-18 06:07:19,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:07:19,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:07:19,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:07:19,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:07:19,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1561, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:07:19,295 INFO L87 Difference]: Start difference. First operand 738 states and 1489 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:20,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:07:20,609 INFO L93 Difference]: Finished difference Result 1037 states and 2053 transitions. [2022-01-18 06:07:20,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 06:07:20,609 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:07:20,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:07:20,611 INFO L225 Difference]: With dead ends: 1037 [2022-01-18 06:07:20,611 INFO L226 Difference]: Without dead ends: 1004 [2022-01-18 06:07:20,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 12 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=403, Invalid=4567, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 06:07:20,611 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 131 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 1862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 420 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:07:20,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 647 Invalid, 1862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1405 Invalid, 0 Unknown, 420 Unchecked, 0.5s Time] [2022-01-18 06:07:20,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2022-01-18 06:07:20,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 754. [2022-01-18 06:07:20,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 2.0119521912350598) internal successors, (1515), 753 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:20,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1515 transitions. [2022-01-18 06:07:20,618 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1515 transitions. Word has length 33 [2022-01-18 06:07:20,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:07:20,619 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1515 transitions. [2022-01-18 06:07:20,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:20,619 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1515 transitions. [2022-01-18 06:07:20,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:07:20,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:07:20,619 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:07:20,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-01-18 06:07:20,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-01-18 06:07:20,820 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:07:20,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:07:20,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1848452472, now seen corresponding path program 131 times [2022-01-18 06:07:20,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:07:20,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679261582] [2022-01-18 06:07:20,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:07:20,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:07:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:07:21,087 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:21,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:07:21,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679261582] [2022-01-18 06:07:21,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679261582] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:07:21,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353935462] [2022-01-18 06:07:21,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:07:21,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:07:21,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:07:21,089 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:07:21,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-01-18 06:07:21,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:07:21,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:07:21,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:07:21,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:07:21,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:07:21,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:07:21,544 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 06:07:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:21,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:07:22,191 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:07:22,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 63 [2022-01-18 06:07:22,252 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:22,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353935462] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:07:22,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:07:22,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-01-18 06:07:22,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011693931] [2022-01-18 06:07:22,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:07:22,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 06:07:22,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:07:22,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 06:07:22,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1876, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 06:07:22,253 INFO L87 Difference]: Start difference. First operand 754 states and 1515 transitions. Second operand has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:24,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:07:24,112 INFO L93 Difference]: Finished difference Result 1164 states and 2305 transitions. [2022-01-18 06:07:24,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 06:07:24,112 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:07:24,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:07:24,114 INFO L225 Difference]: With dead ends: 1164 [2022-01-18 06:07:24,114 INFO L226 Difference]: Without dead ends: 1144 [2022-01-18 06:07:24,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 35 SyntacticMatches, 11 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2202 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=561, Invalid=6579, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 06:07:24,115 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 144 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 1796 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 2346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 502 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:07:24,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 681 Invalid, 2346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1796 Invalid, 0 Unknown, 502 Unchecked, 0.6s Time] [2022-01-18 06:07:24,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2022-01-18 06:07:24,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 758. [2022-01-18 06:07:24,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 2.0132100396301187) internal successors, (1524), 757 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:24,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 1524 transitions. [2022-01-18 06:07:24,122 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 1524 transitions. Word has length 33 [2022-01-18 06:07:24,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:07:24,122 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 1524 transitions. [2022-01-18 06:07:24,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:24,122 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 1524 transitions. [2022-01-18 06:07:24,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:07:24,123 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:07:24,123 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:07:24,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-01-18 06:07:24,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-01-18 06:07:24,328 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:07:24,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:07:24,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1963111564, now seen corresponding path program 132 times [2022-01-18 06:07:24,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:07:24,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282217889] [2022-01-18 06:07:24,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:07:24,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:07:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:07:24,610 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:24,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:07:24,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282217889] [2022-01-18 06:07:24,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282217889] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:07:24,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016086735] [2022-01-18 06:07:24,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:07:24,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:07:24,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:07:24,612 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:07:24,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-01-18 06:07:24,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:07:24,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:07:24,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 06:07:24,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:07:25,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:07:25,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:07:25,030 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 29 treesize of output 13 [2022-01-18 06:07:25,181 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:25,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:07:25,586 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:07:25,586 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 42 treesize of output 60 [2022-01-18 06:07:25,632 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:25,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016086735] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:07:25,632 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:07:25,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:07:25,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48120185] [2022-01-18 06:07:25,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:07:25,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:07:25,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:07:25,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:07:25,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1561, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:07:25,633 INFO L87 Difference]: Start difference. First operand 758 states and 1524 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:27,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:07:27,145 INFO L93 Difference]: Finished difference Result 1176 states and 2344 transitions. [2022-01-18 06:07:27,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 06:07:27,146 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:07:27,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:07:27,147 INFO L225 Difference]: With dead ends: 1176 [2022-01-18 06:07:27,147 INFO L226 Difference]: Without dead ends: 1132 [2022-01-18 06:07:27,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 40 SyntacticMatches, 11 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1716 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=488, Invalid=5364, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 06:07:27,148 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 161 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 2022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 563 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:07:27,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 578 Invalid, 2022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1413 Invalid, 0 Unknown, 563 Unchecked, 0.5s Time] [2022-01-18 06:07:27,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2022-01-18 06:07:27,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 739. [2022-01-18 06:07:27,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 2.0203252032520327) internal successors, (1491), 738 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:27,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1491 transitions. [2022-01-18 06:07:27,155 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1491 transitions. Word has length 33 [2022-01-18 06:07:27,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:07:27,155 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 1491 transitions. [2022-01-18 06:07:27,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:27,155 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1491 transitions. [2022-01-18 06:07:27,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:07:27,156 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:07:27,156 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:07:27,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-01-18 06:07:27,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:07:27,356 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:07:27,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:07:27,357 INFO L85 PathProgramCache]: Analyzing trace with hash -15363376, now seen corresponding path program 133 times [2022-01-18 06:07:27,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:07:27,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490554928] [2022-01-18 06:07:27,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:07:27,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:07:27,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:07:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:27,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:07:27,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490554928] [2022-01-18 06:07:27,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490554928] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:07:27,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064615552] [2022-01-18 06:07:27,633 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:07:27,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:07:27,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:07:27,634 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:07:27,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-01-18 06:07:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:07:27,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:07:27,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:07:28,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:07:28,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:07:28,074 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 27 treesize of output 13 [2022-01-18 06:07:28,225 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:28,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:07:28,655 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:07:28,656 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 42 treesize of output 60 [2022-01-18 06:07:28,712 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:28,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064615552] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:07:28,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:07:28,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:07:28,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493683466] [2022-01-18 06:07:28,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:07:28,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:07:28,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:07:28,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:07:28,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1558, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:07:28,713 INFO L87 Difference]: Start difference. First operand 739 states and 1491 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:31,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:07:31,007 INFO L93 Difference]: Finished difference Result 1419 states and 2829 transitions. [2022-01-18 06:07:31,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-18 06:07:31,007 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:07:31,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:07:31,009 INFO L225 Difference]: With dead ends: 1419 [2022-01-18 06:07:31,009 INFO L226 Difference]: Without dead ends: 1375 [2022-01-18 06:07:31,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2560 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=738, Invalid=8192, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 06:07:31,010 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 203 mSDsluCounter, 1081 mSDsCounter, 0 mSdLazyCounter, 2113 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 2856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 674 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:07:31,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 716 Invalid, 2856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2113 Invalid, 0 Unknown, 674 Unchecked, 0.7s Time] [2022-01-18 06:07:31,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2022-01-18 06:07:31,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 742. [2022-01-18 06:07:31,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.020242914979757) internal successors, (1497), 741 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:31,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1497 transitions. [2022-01-18 06:07:31,019 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1497 transitions. Word has length 33 [2022-01-18 06:07:31,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:07:31,025 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 1497 transitions. [2022-01-18 06:07:31,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:31,025 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1497 transitions. [2022-01-18 06:07:31,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:07:31,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:07:31,025 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:07:31,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-01-18 06:07:31,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-01-18 06:07:31,226 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:07:31,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:07:31,227 INFO L85 PathProgramCache]: Analyzing trace with hash -656473966, now seen corresponding path program 134 times [2022-01-18 06:07:31,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:07:31,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260646143] [2022-01-18 06:07:31,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:07:31,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:07:31,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:07:31,499 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:31,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:07:31,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260646143] [2022-01-18 06:07:31,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260646143] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:07:31,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417527577] [2022-01-18 06:07:31,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:07:31,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:07:31,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:07:31,500 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:07:31,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-01-18 06:07:31,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:07:31,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:07:31,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:07:31,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:07:31,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:07:31,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:07:31,936 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 27 treesize of output 13 [2022-01-18 06:07:32,154 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:32,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:07:32,614 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:07:32,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:07:32,676 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:32,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417527577] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:07:32,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:07:32,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:07:32,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393445132] [2022-01-18 06:07:32,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:07:32,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:07:32,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:07:32,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:07:32,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1549, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:07:32,678 INFO L87 Difference]: Start difference. First operand 742 states and 1497 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:35,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:07:35,302 INFO L93 Difference]: Finished difference Result 1369 states and 2749 transitions. [2022-01-18 06:07:35,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 06:07:35,302 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:07:35,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:07:35,304 INFO L225 Difference]: With dead ends: 1369 [2022-01-18 06:07:35,304 INFO L226 Difference]: Without dead ends: 1337 [2022-01-18 06:07:35,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 40 SyntacticMatches, 11 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2565 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=841, Invalid=7531, Unknown=0, NotChecked=0, Total=8372 [2022-01-18 06:07:35,304 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 225 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 2466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 895 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:07:35,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 666 Invalid, 2466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1476 Invalid, 0 Unknown, 895 Unchecked, 0.6s Time] [2022-01-18 06:07:35,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2022-01-18 06:07:35,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 739. [2022-01-18 06:07:35,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 2.0203252032520327) internal successors, (1491), 738 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:35,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1491 transitions. [2022-01-18 06:07:35,313 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1491 transitions. Word has length 33 [2022-01-18 06:07:35,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:07:35,313 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 1491 transitions. [2022-01-18 06:07:35,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:35,313 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1491 transitions. [2022-01-18 06:07:35,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:07:35,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:07:35,314 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:07:35,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-01-18 06:07:35,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-01-18 06:07:35,515 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:07:35,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:07:35,515 INFO L85 PathProgramCache]: Analyzing trace with hash 769768400, now seen corresponding path program 135 times [2022-01-18 06:07:35,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:07:35,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97796340] [2022-01-18 06:07:35,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:07:35,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:07:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:07:35,791 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:35,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:07:35,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97796340] [2022-01-18 06:07:35,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97796340] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:07:35,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941570737] [2022-01-18 06:07:35,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:07:35,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:07:35,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:07:35,793 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:07:35,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-01-18 06:07:35,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:07:35,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:07:35,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:07:35,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:07:36,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:07:36,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:07:36,170 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 27 treesize of output 13 [2022-01-18 06:07:36,361 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:36,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:07:36,827 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:07:36,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:07:36,891 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:36,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941570737] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:07:36,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:07:36,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:07:36,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737666398] [2022-01-18 06:07:36,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:07:36,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:07:36,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:07:36,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:07:36,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:07:36,893 INFO L87 Difference]: Start difference. First operand 739 states and 1491 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:40,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:07:40,170 INFO L93 Difference]: Finished difference Result 1452 states and 2890 transitions. [2022-01-18 06:07:40,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-18 06:07:40,171 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:07:40,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:07:40,172 INFO L225 Difference]: With dead ends: 1452 [2022-01-18 06:07:40,172 INFO L226 Difference]: Without dead ends: 1424 [2022-01-18 06:07:40,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 39 SyntacticMatches, 11 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3386 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1182, Invalid=9738, Unknown=0, NotChecked=0, Total=10920 [2022-01-18 06:07:40,174 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 287 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 2607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 721 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:07:40,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 717 Invalid, 2607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1775 Invalid, 0 Unknown, 721 Unchecked, 0.7s Time] [2022-01-18 06:07:40,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2022-01-18 06:07:40,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 735. [2022-01-18 06:07:40,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 2.016348773841962) internal successors, (1480), 734 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:40,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1480 transitions. [2022-01-18 06:07:40,182 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1480 transitions. Word has length 33 [2022-01-18 06:07:40,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:07:40,182 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 1480 transitions. [2022-01-18 06:07:40,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:40,182 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1480 transitions. [2022-01-18 06:07:40,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:07:40,183 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:07:40,183 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:07:40,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-01-18 06:07:40,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:07:40,383 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:07:40,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:07:40,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1124068932, now seen corresponding path program 136 times [2022-01-18 06:07:40,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:07:40,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983134667] [2022-01-18 06:07:40,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:07:40,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:07:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:07:40,636 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:40,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:07:40,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983134667] [2022-01-18 06:07:40,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983134667] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:07:40,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218941989] [2022-01-18 06:07:40,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:07:40,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:07:40,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:07:40,637 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:07:40,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-01-18 06:07:40,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:07:40,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:07:40,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:07:40,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:07:41,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:07:41,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:07:41,069 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 27 treesize of output 13 [2022-01-18 06:07:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:41,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:07:41,632 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:07:41,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:07:41,692 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:41,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218941989] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:07:41,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:07:41,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:07:41,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503815962] [2022-01-18 06:07:41,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:07:41,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:07:41,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:07:41,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:07:41,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1558, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:07:41,693 INFO L87 Difference]: Start difference. First operand 735 states and 1480 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:43,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:07:43,019 INFO L93 Difference]: Finished difference Result 1011 states and 2010 transitions. [2022-01-18 06:07:43,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 06:07:43,020 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:07:43,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:07:43,021 INFO L225 Difference]: With dead ends: 1011 [2022-01-18 06:07:43,021 INFO L226 Difference]: Without dead ends: 975 [2022-01-18 06:07:43,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=422, Invalid=4690, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 06:07:43,022 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 122 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:07:43,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 551 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1481 Invalid, 0 Unknown, 183 Unchecked, 0.5s Time] [2022-01-18 06:07:43,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-01-18 06:07:43,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 746. [2022-01-18 06:07:43,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 2.0134228187919465) internal successors, (1500), 745 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:43,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1500 transitions. [2022-01-18 06:07:43,029 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1500 transitions. Word has length 33 [2022-01-18 06:07:43,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:07:43,029 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 1500 transitions. [2022-01-18 06:07:43,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:43,029 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1500 transitions. [2022-01-18 06:07:43,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:07:43,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:07:43,030 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:07:43,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-01-18 06:07:43,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:07:43,230 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:07:43,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:07:43,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1900454904, now seen corresponding path program 137 times [2022-01-18 06:07:43,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:07:43,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143525693] [2022-01-18 06:07:43,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:07:43,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:07:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:07:43,518 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:43,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:07:43,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143525693] [2022-01-18 06:07:43,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143525693] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:07:43,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804091572] [2022-01-18 06:07:43,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:07:43,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:07:43,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:07:43,525 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:07:43,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-01-18 06:07:43,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:07:43,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:07:43,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:07:43,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:07:43,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:07:43,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:07:43,994 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 06:07:44,162 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:44,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:07:44,676 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:07:44,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 63 [2022-01-18 06:07:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:44,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804091572] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:07:44,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:07:44,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-01-18 06:07:44,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455388688] [2022-01-18 06:07:44,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:07:44,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 06:07:44,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:07:44,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 06:07:44,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1878, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 06:07:44,724 INFO L87 Difference]: Start difference. First operand 746 states and 1500 transitions. Second operand has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:46,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:07:46,249 INFO L93 Difference]: Finished difference Result 1092 states and 2189 transitions. [2022-01-18 06:07:46,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 06:07:46,250 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:07:46,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:07:46,251 INFO L225 Difference]: With dead ends: 1092 [2022-01-18 06:07:46,251 INFO L226 Difference]: Without dead ends: 1043 [2022-01-18 06:07:46,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 35 SyntacticMatches, 10 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1797 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=495, Invalid=5667, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 06:07:46,251 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 156 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 359 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:07:46,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 524 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1631 Invalid, 0 Unknown, 359 Unchecked, 0.6s Time] [2022-01-18 06:07:46,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2022-01-18 06:07:46,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 737. [2022-01-18 06:07:46,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.016304347826087) internal successors, (1484), 736 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:46,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1484 transitions. [2022-01-18 06:07:46,260 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1484 transitions. Word has length 33 [2022-01-18 06:07:46,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:07:46,260 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 1484 transitions. [2022-01-18 06:07:46,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:46,261 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1484 transitions. [2022-01-18 06:07:46,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:07:46,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:07:46,261 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:07:46,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-01-18 06:07:46,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:07:46,462 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:07:46,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:07:46,462 INFO L85 PathProgramCache]: Analyzing trace with hash 261553658, now seen corresponding path program 138 times [2022-01-18 06:07:46,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:07:46,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944259486] [2022-01-18 06:07:46,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:07:46,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:07:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:07:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:46,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:07:46,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944259486] [2022-01-18 06:07:46,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944259486] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:07:46,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42743008] [2022-01-18 06:07:46,754 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:07:46,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:07:46,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:07:46,755 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:07:46,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-01-18 06:07:46,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:07:46,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:07:46,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:07:46,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:07:47,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:07:47,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:07:47,217 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 27 treesize of output 13 [2022-01-18 06:07:47,370 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:47,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:07:47,825 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:07:47,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:07:47,882 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:47,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42743008] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:07:47,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:07:47,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:07:47,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324653781] [2022-01-18 06:07:47,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:07:47,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:07:47,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:07:47,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:07:47,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:07:47,883 INFO L87 Difference]: Start difference. First operand 737 states and 1484 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:49,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:07:49,323 INFO L93 Difference]: Finished difference Result 1001 states and 1990 transitions. [2022-01-18 06:07:49,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 06:07:49,324 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:07:49,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:07:49,325 INFO L225 Difference]: With dead ends: 1001 [2022-01-18 06:07:49,325 INFO L226 Difference]: Without dead ends: 969 [2022-01-18 06:07:49,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=490, Invalid=5210, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 06:07:49,325 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 201 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 670 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:07:49,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 380 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 994 Invalid, 0 Unknown, 670 Unchecked, 0.4s Time] [2022-01-18 06:07:49,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2022-01-18 06:07:49,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 752. [2022-01-18 06:07:49,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 2.0119840213049267) internal successors, (1511), 751 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:49,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1511 transitions. [2022-01-18 06:07:49,332 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1511 transitions. Word has length 33 [2022-01-18 06:07:49,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:07:49,332 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 1511 transitions. [2022-01-18 06:07:49,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:49,332 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1511 transitions. [2022-01-18 06:07:49,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:07:49,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:07:49,332 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:07:49,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-01-18 06:07:49,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2022-01-18 06:07:49,533 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:07:49,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:07:49,533 INFO L85 PathProgramCache]: Analyzing trace with hash -7589228, now seen corresponding path program 139 times [2022-01-18 06:07:49,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:07:49,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543322424] [2022-01-18 06:07:49,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:07:49,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:07:49,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:07:49,785 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:49,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:07:49,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543322424] [2022-01-18 06:07:49,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543322424] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:07:49,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251539698] [2022-01-18 06:07:49,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:07:49,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:07:49,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:07:49,787 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:07:49,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-01-18 06:07:49,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:07:49,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:07:49,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:07:50,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:07:50,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:07:50,193 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 27 treesize of output 13 [2022-01-18 06:07:50,341 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:50,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:07:50,801 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:07:50,801 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 42 treesize of output 60 [2022-01-18 06:07:50,847 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:50,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251539698] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:07:50,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:07:50,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:07:50,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273239020] [2022-01-18 06:07:50,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:07:50,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:07:50,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:07:50,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:07:50,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:07:50,850 INFO L87 Difference]: Start difference. First operand 752 states and 1511 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:52,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:07:52,421 INFO L93 Difference]: Finished difference Result 1049 states and 2068 transitions. [2022-01-18 06:07:52,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 06:07:52,422 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:07:52,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:07:52,423 INFO L225 Difference]: With dead ends: 1049 [2022-01-18 06:07:52,423 INFO L226 Difference]: Without dead ends: 972 [2022-01-18 06:07:52,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 39 SyntacticMatches, 10 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1812 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=523, Invalid=5797, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 06:07:52,423 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 170 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 1653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:07:52,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 493 Invalid, 1653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1404 Invalid, 0 Unknown, 200 Unchecked, 0.5s Time] [2022-01-18 06:07:52,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2022-01-18 06:07:52,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 740. [2022-01-18 06:07:52,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.016238159675237) internal successors, (1490), 739 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:52,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1490 transitions. [2022-01-18 06:07:52,430 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1490 transitions. Word has length 33 [2022-01-18 06:07:52,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:07:52,430 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 1490 transitions. [2022-01-18 06:07:52,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:52,430 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1490 transitions. [2022-01-18 06:07:52,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:07:52,431 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:07:52,431 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:07:52,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-01-18 06:07:52,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-01-18 06:07:52,631 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:07:52,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:07:52,632 INFO L85 PathProgramCache]: Analyzing trace with hash -379556932, now seen corresponding path program 140 times [2022-01-18 06:07:52,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:07:52,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449440466] [2022-01-18 06:07:52,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:07:52,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:07:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:07:52,884 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:52,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:07:52,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449440466] [2022-01-18 06:07:52,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449440466] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:07:52,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112657099] [2022-01-18 06:07:52,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:07:52,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:07:52,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:07:52,886 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:07:52,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-01-18 06:07:52,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:07:52,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:07:52,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:07:52,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:07:53,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:07:53,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:07:53,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 06:07:53,404 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:53,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:07:53,813 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:07:53,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:07:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:53,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112657099] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:07:53,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:07:53,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:07:53,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501132003] [2022-01-18 06:07:53,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:07:53,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:07:53,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:07:53,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:07:53,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1539, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:07:53,867 INFO L87 Difference]: Start difference. First operand 740 states and 1490 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:55,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:07:55,773 INFO L93 Difference]: Finished difference Result 1168 states and 2313 transitions. [2022-01-18 06:07:55,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 06:07:55,774 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:07:55,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:07:55,775 INFO L225 Difference]: With dead ends: 1168 [2022-01-18 06:07:55,775 INFO L226 Difference]: Without dead ends: 1136 [2022-01-18 06:07:55,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2260 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=756, Invalid=7076, Unknown=0, NotChecked=0, Total=7832 [2022-01-18 06:07:55,776 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 174 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 278 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:07:55,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 459 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1263 Invalid, 0 Unknown, 278 Unchecked, 0.5s Time] [2022-01-18 06:07:55,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-01-18 06:07:55,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 737. [2022-01-18 06:07:55,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.016304347826087) internal successors, (1484), 736 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:55,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1484 transitions. [2022-01-18 06:07:55,783 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1484 transitions. Word has length 33 [2022-01-18 06:07:55,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:07:55,783 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 1484 transitions. [2022-01-18 06:07:55,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:55,783 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1484 transitions. [2022-01-18 06:07:55,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:07:55,783 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:07:55,784 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:07:55,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-01-18 06:07:55,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-01-18 06:07:55,984 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:07:55,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:07:55,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1046685434, now seen corresponding path program 141 times [2022-01-18 06:07:55,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:07:55,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633482142] [2022-01-18 06:07:55,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:07:55,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:07:55,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:07:56,289 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:56,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:07:56,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633482142] [2022-01-18 06:07:56,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633482142] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:07:56,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786306886] [2022-01-18 06:07:56,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:07:56,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:07:56,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:07:56,290 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:07:56,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-01-18 06:07:56,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:07:56,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:07:56,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:07:56,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:07:56,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:07:56,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:07:56,631 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 27 treesize of output 13 [2022-01-18 06:07:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:56,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:07:57,249 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:07:57,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:07:57,299 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:57,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786306886] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:07:57,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:07:57,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:07:57,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158612985] [2022-01-18 06:07:57,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:07:57,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:07:57,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:07:57,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:07:57,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1536, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:07:57,300 INFO L87 Difference]: Start difference. First operand 737 states and 1484 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:59,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:07:59,848 INFO L93 Difference]: Finished difference Result 1265 states and 2518 transitions. [2022-01-18 06:07:59,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 06:07:59,849 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:07:59,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:07:59,850 INFO L225 Difference]: With dead ends: 1265 [2022-01-18 06:07:59,850 INFO L226 Difference]: Without dead ends: 1237 [2022-01-18 06:07:59,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2694 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1006, Invalid=8306, Unknown=0, NotChecked=0, Total=9312 [2022-01-18 06:07:59,851 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 226 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 1433 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 415 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:07:59,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 439 Invalid, 1951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1433 Invalid, 0 Unknown, 415 Unchecked, 0.5s Time] [2022-01-18 06:07:59,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2022-01-18 06:07:59,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 736. [2022-01-18 06:07:59,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 2.016326530612245) internal successors, (1482), 735 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:59,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1482 transitions. [2022-01-18 06:07:59,859 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1482 transitions. Word has length 33 [2022-01-18 06:07:59,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:07:59,859 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 1482 transitions. [2022-01-18 06:07:59,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:59,859 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1482 transitions. [2022-01-18 06:07:59,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:07:59,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:07:59,860 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:07:59,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-01-18 06:08:00,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:08:00,060 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:08:00,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:08:00,061 INFO L85 PathProgramCache]: Analyzing trace with hash -548232470, now seen corresponding path program 142 times [2022-01-18 06:08:00,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:08:00,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292532890] [2022-01-18 06:08:00,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:08:00,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:08:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:08:00,317 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:00,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:08:00,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292532890] [2022-01-18 06:08:00,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292532890] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:08:00,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423735637] [2022-01-18 06:08:00,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:08:00,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:08:00,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:08:00,318 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:08:00,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-01-18 06:08:00,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:08:00,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:08:00,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:08:00,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:08:00,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:08:00,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:08:00,742 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 27 treesize of output 13 [2022-01-18 06:08:00,897 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:00,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:08:01,333 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:08:01,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:08:01,376 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:01,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423735637] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:08:01,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:08:01,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:08:01,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018259487] [2022-01-18 06:08:01,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:08:01,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:08:01,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:08:01,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:08:01,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1557, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:08:01,377 INFO L87 Difference]: Start difference. First operand 736 states and 1482 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:02,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:08:02,870 INFO L93 Difference]: Finished difference Result 1163 states and 2303 transitions. [2022-01-18 06:08:02,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 06:08:02,870 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:08:02,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:08:02,872 INFO L225 Difference]: With dead ends: 1163 [2022-01-18 06:08:02,872 INFO L226 Difference]: Without dead ends: 1091 [2022-01-18 06:08:02,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1610 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=516, Invalid=5490, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 06:08:02,873 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 182 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 1850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 584 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:08:02,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 478 Invalid, 1850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1223 Invalid, 0 Unknown, 584 Unchecked, 0.5s Time] [2022-01-18 06:08:02,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2022-01-18 06:08:02,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 756. [2022-01-18 06:08:02,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.0119205298013245) internal successors, (1519), 755 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:02,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1519 transitions. [2022-01-18 06:08:02,880 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1519 transitions. Word has length 33 [2022-01-18 06:08:02,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:08:02,880 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 1519 transitions. [2022-01-18 06:08:02,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:02,880 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1519 transitions. [2022-01-18 06:08:02,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:08:02,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:08:02,881 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:08:02,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-01-18 06:08:03,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-01-18 06:08:03,087 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:08:03,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:08:03,088 INFO L85 PathProgramCache]: Analyzing trace with hash -817375356, now seen corresponding path program 143 times [2022-01-18 06:08:03,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:08:03,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247525628] [2022-01-18 06:08:03,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:08:03,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:08:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:08:03,373 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:03,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:08:03,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247525628] [2022-01-18 06:08:03,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247525628] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:08:03,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883029552] [2022-01-18 06:08:03,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:08:03,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:08:03,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:08:03,374 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:08:03,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-01-18 06:08:03,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:08:03,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:08:03,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:08:03,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:08:03,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:08:03,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:08:03,856 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 06:08:04,008 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:04,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:08:04,511 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:08:04,512 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 47 treesize of output 63 [2022-01-18 06:08:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:04,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883029552] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:08:04,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:08:04,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-01-18 06:08:04,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997028153] [2022-01-18 06:08:04,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:08:04,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 06:08:04,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:08:04,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 06:08:04,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1861, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 06:08:04,572 INFO L87 Difference]: Start difference. First operand 756 states and 1519 transitions. Second operand has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:05,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:08:05,838 INFO L93 Difference]: Finished difference Result 1039 states and 2065 transitions. [2022-01-18 06:08:05,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 06:08:05,838 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:08:05,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:08:05,839 INFO L225 Difference]: With dead ends: 1039 [2022-01-18 06:08:05,839 INFO L226 Difference]: Without dead ends: 1021 [2022-01-18 06:08:05,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 33 SyntacticMatches, 10 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=467, Invalid=4935, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 06:08:05,840 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 135 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 1396 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:08:05,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 440 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1396 Invalid, 0 Unknown, 250 Unchecked, 0.5s Time] [2022-01-18 06:08:05,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2022-01-18 06:08:05,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 756. [2022-01-18 06:08:05,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.009271523178808) internal successors, (1517), 755 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:05,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1517 transitions. [2022-01-18 06:08:05,847 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1517 transitions. Word has length 33 [2022-01-18 06:08:05,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:08:05,847 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 1517 transitions. [2022-01-18 06:08:05,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:05,847 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1517 transitions. [2022-01-18 06:08:05,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:08:05,848 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:08:05,848 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:08:05,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-01-18 06:08:06,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-01-18 06:08:06,048 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:08:06,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:08:06,049 INFO L85 PathProgramCache]: Analyzing trace with hash 2066337224, now seen corresponding path program 144 times [2022-01-18 06:08:06,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:08:06,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093688757] [2022-01-18 06:08:06,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:08:06,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:08:06,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:08:06,306 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:06,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:08:06,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093688757] [2022-01-18 06:08:06,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093688757] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:08:06,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503573782] [2022-01-18 06:08:06,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:08:06,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:08:06,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:08:06,307 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:08:06,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-01-18 06:08:06,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:08:06,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:08:06,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 06:08:06,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:08:06,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:08:06,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:08:06,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:08:06,712 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 06:08:06,912 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:06,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:08:07,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:08:07,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:08:07,565 INFO L353 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2022-01-18 06:08:07,566 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 47 treesize of output 55 [2022-01-18 06:08:07,681 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:07,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503573782] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:08:07,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:08:07,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 48 [2022-01-18 06:08:07,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958748267] [2022-01-18 06:08:07,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:08:07,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-18 06:08:07,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:08:07,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-18 06:08:07,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=2104, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 06:08:07,682 INFO L87 Difference]: Start difference. First operand 756 states and 1517 transitions. Second operand has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:13,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:08:13,187 INFO L93 Difference]: Finished difference Result 1602 states and 3115 transitions. [2022-01-18 06:08:13,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-18 06:08:13,187 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:08:13,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:08:13,189 INFO L225 Difference]: With dead ends: 1602 [2022-01-18 06:08:13,189 INFO L226 Difference]: Without dead ends: 1445 [2022-01-18 06:08:13,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 34 SyntacticMatches, 13 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5934 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1958, Invalid=18064, Unknown=0, NotChecked=0, Total=20022 [2022-01-18 06:08:13,190 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 390 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 2807 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 3846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 2807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 831 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:08:13,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 732 Invalid, 3846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 2807 Invalid, 0 Unknown, 831 Unchecked, 1.2s Time] [2022-01-18 06:08:13,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2022-01-18 06:08:13,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 821. [2022-01-18 06:08:13,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 2.0134146341463413) internal successors, (1651), 820 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:13,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1651 transitions. [2022-01-18 06:08:13,201 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1651 transitions. Word has length 33 [2022-01-18 06:08:13,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:08:13,201 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 1651 transitions. [2022-01-18 06:08:13,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:13,201 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1651 transitions. [2022-01-18 06:08:13,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:08:13,202 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:08:13,202 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:08:13,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-01-18 06:08:13,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:08:13,402 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:08:13,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:08:13,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1189343060, now seen corresponding path program 145 times [2022-01-18 06:08:13,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:08:13,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562294438] [2022-01-18 06:08:13,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:08:13,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:08:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:08:13,656 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:13,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:08:13,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562294438] [2022-01-18 06:08:13,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562294438] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:08:13,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653821926] [2022-01-18 06:08:13,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:08:13,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:08:13,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:08:13,658 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:08:13,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-01-18 06:08:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:08:13,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:08:13,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:08:14,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:08:14,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:08:14,008 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 27 treesize of output 13 [2022-01-18 06:08:14,188 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:14,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:08:14,604 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:08:14,604 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 42 treesize of output 60 [2022-01-18 06:08:14,663 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:14,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653821926] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:08:14,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:08:14,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:08:14,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255053770] [2022-01-18 06:08:14,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:08:14,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:08:14,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:08:14,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:08:14,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1541, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:08:14,665 INFO L87 Difference]: Start difference. First operand 821 states and 1651 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:16,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:08:16,351 INFO L93 Difference]: Finished difference Result 1211 states and 2412 transitions. [2022-01-18 06:08:16,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 06:08:16,352 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:08:16,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:08:16,353 INFO L225 Difference]: With dead ends: 1211 [2022-01-18 06:08:16,353 INFO L226 Difference]: Without dead ends: 1179 [2022-01-18 06:08:16,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1908 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=659, Invalid=5983, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 06:08:16,354 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 172 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:08:16,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 411 Invalid, 1680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1367 Invalid, 0 Unknown, 262 Unchecked, 0.5s Time] [2022-01-18 06:08:16,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2022-01-18 06:08:16,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 821. [2022-01-18 06:08:16,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 2.0134146341463413) internal successors, (1651), 820 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:16,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1651 transitions. [2022-01-18 06:08:16,362 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1651 transitions. Word has length 33 [2022-01-18 06:08:16,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:08:16,362 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 1651 transitions. [2022-01-18 06:08:16,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:16,363 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1651 transitions. [2022-01-18 06:08:16,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:08:16,363 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:08:16,363 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:08:16,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-01-18 06:08:16,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2022-01-18 06:08:16,564 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:08:16,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:08:16,564 INFO L85 PathProgramCache]: Analyzing trace with hash 236899306, now seen corresponding path program 146 times [2022-01-18 06:08:16,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:08:16,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220226646] [2022-01-18 06:08:16,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:08:16,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:08:16,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:08:16,849 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:16,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:08:16,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220226646] [2022-01-18 06:08:16,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220226646] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:08:16,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128771559] [2022-01-18 06:08:16,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:08:16,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:08:16,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:08:16,851 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:08:16,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-01-18 06:08:16,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:08:16,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:08:16,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:08:16,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:08:17,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:08:17,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:08:17,220 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 27 treesize of output 13 [2022-01-18 06:08:17,408 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:17,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:08:17,866 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:08:17,866 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 42 treesize of output 60 [2022-01-18 06:08:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:17,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128771559] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:08:17,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:08:17,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:08:17,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376100364] [2022-01-18 06:08:17,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:08:17,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:08:17,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:08:17,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:08:17,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:08:17,920 INFO L87 Difference]: Start difference. First operand 821 states and 1651 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:20,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:08:20,301 INFO L93 Difference]: Finished difference Result 1384 states and 2754 transitions. [2022-01-18 06:08:20,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 06:08:20,301 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:08:20,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:08:20,303 INFO L225 Difference]: With dead ends: 1384 [2022-01-18 06:08:20,303 INFO L226 Difference]: Without dead ends: 1356 [2022-01-18 06:08:20,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2676 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=976, Invalid=8336, Unknown=0, NotChecked=0, Total=9312 [2022-01-18 06:08:20,304 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 199 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 1698 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 2382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 592 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:08:20,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 555 Invalid, 2382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1698 Invalid, 0 Unknown, 592 Unchecked, 0.6s Time] [2022-01-18 06:08:20,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2022-01-18 06:08:20,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 821. [2022-01-18 06:08:20,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 2.0134146341463413) internal successors, (1651), 820 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:20,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1651 transitions. [2022-01-18 06:08:20,312 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1651 transitions. Word has length 33 [2022-01-18 06:08:20,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:08:20,312 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 1651 transitions. [2022-01-18 06:08:20,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:20,312 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1651 transitions. [2022-01-18 06:08:20,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:08:20,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:08:20,313 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:08:20,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-01-18 06:08:20,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:08:20,514 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:08:20,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:08:20,514 INFO L85 PathProgramCache]: Analyzing trace with hash 614999010, now seen corresponding path program 147 times [2022-01-18 06:08:20,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:08:20,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105683775] [2022-01-18 06:08:20,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:08:20,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:08:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:08:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:20,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:08:20,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105683775] [2022-01-18 06:08:20,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105683775] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:08:20,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688186848] [2022-01-18 06:08:20,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:08:20,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:08:20,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:08:20,777 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:08:20,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-01-18 06:08:20,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:08:20,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:08:20,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 06:08:20,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:08:21,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:08:21,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:08:21,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 06:08:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:21,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:08:21,754 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:08:21,754 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 42 treesize of output 60 [2022-01-18 06:08:21,801 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:21,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688186848] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:08:21,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:08:21,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:08:21,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896659969] [2022-01-18 06:08:21,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:08:21,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:08:21,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:08:21,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:08:21,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:08:21,802 INFO L87 Difference]: Start difference. First operand 821 states and 1651 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:23,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:08:23,082 INFO L93 Difference]: Finished difference Result 1152 states and 2297 transitions. [2022-01-18 06:08:23,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 06:08:23,082 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:08:23,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:08:23,083 INFO L225 Difference]: With dead ends: 1152 [2022-01-18 06:08:23,083 INFO L226 Difference]: Without dead ends: 1110 [2022-01-18 06:08:23,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1462 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=456, Invalid=4946, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 06:08:23,084 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 153 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 1784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 482 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:08:23,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 513 Invalid, 1784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1262 Invalid, 0 Unknown, 482 Unchecked, 0.5s Time] [2022-01-18 06:08:23,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2022-01-18 06:08:23,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 802. [2022-01-18 06:08:23,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 2.0187265917602994) internal successors, (1617), 801 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:23,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 1617 transitions. [2022-01-18 06:08:23,091 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 1617 transitions. Word has length 33 [2022-01-18 06:08:23,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:08:23,091 INFO L470 AbstractCegarLoop]: Abstraction has 802 states and 1617 transitions. [2022-01-18 06:08:23,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:23,091 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 1617 transitions. [2022-01-18 06:08:23,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:08:23,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:08:23,092 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:08:23,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-01-18 06:08:23,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:08:23,292 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:08:23,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:08:23,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1965596322, now seen corresponding path program 148 times [2022-01-18 06:08:23,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:08:23,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731843283] [2022-01-18 06:08:23,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:08:23,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:08:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:08:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:23,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:08:23,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731843283] [2022-01-18 06:08:23,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731843283] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:08:23,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298736212] [2022-01-18 06:08:23,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:08:23,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:08:23,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:08:23,559 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:08:23,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-01-18 06:08:23,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:08:23,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:08:23,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:08:23,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:08:23,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:08:23,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:08:23,902 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 27 treesize of output 13 [2022-01-18 06:08:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:24,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:08:24,540 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:08:24,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:08:24,613 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:24,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298736212] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:08:24,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:08:24,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:08:24,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548116437] [2022-01-18 06:08:24,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:08:24,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:08:24,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:08:24,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:08:24,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:08:24,615 INFO L87 Difference]: Start difference. First operand 802 states and 1617 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:25,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:08:25,902 INFO L93 Difference]: Finished difference Result 1320 states and 2641 transitions. [2022-01-18 06:08:25,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 06:08:25,902 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:08:25,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:08:25,904 INFO L225 Difference]: With dead ends: 1320 [2022-01-18 06:08:25,904 INFO L226 Difference]: Without dead ends: 1288 [2022-01-18 06:08:25,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=494, Invalid=4908, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 06:08:25,905 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 162 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 275 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:08:25,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 404 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1420 Invalid, 0 Unknown, 275 Unchecked, 0.5s Time] [2022-01-18 06:08:25,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2022-01-18 06:08:25,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 803. [2022-01-18 06:08:25,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 2.018703241895262) internal successors, (1619), 802 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:25,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1619 transitions. [2022-01-18 06:08:25,913 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1619 transitions. Word has length 33 [2022-01-18 06:08:25,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:08:25,913 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 1619 transitions. [2022-01-18 06:08:25,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:25,913 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1619 transitions. [2022-01-18 06:08:25,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:08:25,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:08:25,914 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:08:25,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-01-18 06:08:26,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:08:26,114 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:08:26,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:08:26,114 INFO L85 PathProgramCache]: Analyzing trace with hash -903128608, now seen corresponding path program 149 times [2022-01-18 06:08:26,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:08:26,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669348867] [2022-01-18 06:08:26,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:08:26,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:08:26,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:08:26,361 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:26,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:08:26,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669348867] [2022-01-18 06:08:26,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669348867] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:08:26,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487518896] [2022-01-18 06:08:26,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:08:26,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:08:26,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:08:26,362 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:08:26,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-01-18 06:08:26,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:08:26,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:08:26,386 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:08:26,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:08:26,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:08:26,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:08:26,684 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 27 treesize of output 13 [2022-01-18 06:08:26,999 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:26,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:08:27,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:08:27,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:08:27,599 INFO L353 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2022-01-18 06:08:27,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 55 [2022-01-18 06:08:27,716 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:27,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487518896] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:08:27,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:08:27,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 48 [2022-01-18 06:08:27,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792616835] [2022-01-18 06:08:27,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:08:27,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-18 06:08:27,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:08:27,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-18 06:08:27,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=2092, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 06:08:27,717 INFO L87 Difference]: Start difference. First operand 803 states and 1619 transitions. Second operand has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:33,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:08:33,954 INFO L93 Difference]: Finished difference Result 1721 states and 3359 transitions. [2022-01-18 06:08:33,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-18 06:08:33,954 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:08:33,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:08:33,956 INFO L225 Difference]: With dead ends: 1721 [2022-01-18 06:08:33,956 INFO L226 Difference]: Without dead ends: 1597 [2022-01-18 06:08:33,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8048 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2641, Invalid=23119, Unknown=0, NotChecked=0, Total=25760 [2022-01-18 06:08:33,958 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 474 mSDsluCounter, 1371 mSDsCounter, 0 mSdLazyCounter, 3554 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 4026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 3554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:08:33,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 812 Invalid, 4026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 3554 Invalid, 0 Unknown, 225 Unchecked, 1.5s Time] [2022-01-18 06:08:33,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2022-01-18 06:08:33,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 842. [2022-01-18 06:08:33,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 2.023781212841855) internal successors, (1702), 841 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:33,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1702 transitions. [2022-01-18 06:08:33,970 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1702 transitions. Word has length 33 [2022-01-18 06:08:33,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:08:33,970 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1702 transitions. [2022-01-18 06:08:33,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:33,971 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1702 transitions. [2022-01-18 06:08:33,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:08:33,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:08:33,971 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:08:33,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-01-18 06:08:34,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:08:34,172 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:08:34,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:08:34,172 INFO L85 PathProgramCache]: Analyzing trace with hash 132052688, now seen corresponding path program 150 times [2022-01-18 06:08:34,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:08:34,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988393687] [2022-01-18 06:08:34,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:08:34,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:08:34,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:08:34,423 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:34,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:08:34,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988393687] [2022-01-18 06:08:34,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988393687] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:08:34,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532482040] [2022-01-18 06:08:34,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:08:34,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:08:34,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:08:34,424 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:08:34,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-01-18 06:08:34,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:08:34,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:08:34,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 06:08:34,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:08:34,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:08:34,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:08:34,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:08:34,739 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 06:08:34,925 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:34,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:08:35,355 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:08:35,356 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 42 treesize of output 60 [2022-01-18 06:08:35,406 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:35,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532482040] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:08:35,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:08:35,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:08:35,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327686508] [2022-01-18 06:08:35,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:08:35,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:08:35,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:08:35,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:08:35,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:08:35,407 INFO L87 Difference]: Start difference. First operand 842 states and 1702 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:36,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:08:36,794 INFO L93 Difference]: Finished difference Result 1155 states and 2310 transitions. [2022-01-18 06:08:36,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 06:08:36,794 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:08:36,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:08:36,796 INFO L225 Difference]: With dead ends: 1155 [2022-01-18 06:08:36,796 INFO L226 Difference]: Without dead ends: 1127 [2022-01-18 06:08:36,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=519, Invalid=5181, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 06:08:36,796 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 150 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:08:36,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 436 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1502 Invalid, 0 Unknown, 151 Unchecked, 0.5s Time] [2022-01-18 06:08:36,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-01-18 06:08:36,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 841. [2022-01-18 06:08:36,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 2.0238095238095237) internal successors, (1700), 840 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:36,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1700 transitions. [2022-01-18 06:08:36,804 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1700 transitions. Word has length 33 [2022-01-18 06:08:36,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:08:36,804 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1700 transitions. [2022-01-18 06:08:36,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:36,804 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1700 transitions. [2022-01-18 06:08:36,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:08:36,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:08:36,805 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:08:36,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-01-18 06:08:37,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:08:37,006 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:08:37,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:08:37,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1686290802, now seen corresponding path program 151 times [2022-01-18 06:08:37,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:08:37,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465753177] [2022-01-18 06:08:37,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:08:37,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:08:37,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:08:37,260 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:37,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:08:37,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465753177] [2022-01-18 06:08:37,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465753177] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:08:37,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538008447] [2022-01-18 06:08:37,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:08:37,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:08:37,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:08:37,261 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:08:37,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-01-18 06:08:37,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:08:37,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:08:37,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:08:37,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:08:37,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:08:37,670 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 27 treesize of output 13 [2022-01-18 06:08:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:37,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:08:38,232 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:08:38,232 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 42 treesize of output 60 [2022-01-18 06:08:38,289 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:38,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538008447] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:08:38,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:08:38,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:08:38,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903719995] [2022-01-18 06:08:38,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:08:38,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:08:38,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:08:38,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:08:38,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1552, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:08:38,290 INFO L87 Difference]: Start difference. First operand 841 states and 1700 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:39,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:08:39,997 INFO L93 Difference]: Finished difference Result 1266 states and 2512 transitions. [2022-01-18 06:08:39,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 06:08:39,997 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:08:39,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:08:39,999 INFO L225 Difference]: With dead ends: 1266 [2022-01-18 06:08:39,999 INFO L226 Difference]: Without dead ends: 1202 [2022-01-18 06:08:39,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 38 SyntacticMatches, 12 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2014 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=554, Invalid=5926, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 06:08:39,999 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 186 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 2018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 335 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:08:40,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 566 Invalid, 2018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1626 Invalid, 0 Unknown, 335 Unchecked, 0.6s Time] [2022-01-18 06:08:40,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2022-01-18 06:08:40,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 863. [2022-01-18 06:08:40,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 2.01508120649652) internal successors, (1737), 862 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:40,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1737 transitions. [2022-01-18 06:08:40,008 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1737 transitions. Word has length 33 [2022-01-18 06:08:40,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:08:40,008 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 1737 transitions. [2022-01-18 06:08:40,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:40,008 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1737 transitions. [2022-01-18 06:08:40,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:08:40,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:08:40,009 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:08:40,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-01-18 06:08:40,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-01-18 06:08:40,209 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:08:40,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:08:40,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1816738172, now seen corresponding path program 152 times [2022-01-18 06:08:40,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:08:40,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255172231] [2022-01-18 06:08:40,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:08:40,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:08:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:08:40,464 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:40,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:08:40,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255172231] [2022-01-18 06:08:40,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255172231] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:08:40,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991586256] [2022-01-18 06:08:40,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:08:40,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:08:40,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:08:40,466 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:08:40,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-01-18 06:08:40,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:08:40,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:08:40,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:08:40,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:08:40,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:08:40,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:08:40,882 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 27 treesize of output 13 [2022-01-18 06:08:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:41,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:08:41,426 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:08:41,427 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 42 treesize of output 60 [2022-01-18 06:08:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:41,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991586256] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:08:41,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:08:41,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:08:41,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77077000] [2022-01-18 06:08:41,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:08:41,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:08:41,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:08:41,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:08:41,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1552, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:08:41,486 INFO L87 Difference]: Start difference. First operand 863 states and 1737 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:42,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:08:42,925 INFO L93 Difference]: Finished difference Result 1119 states and 2223 transitions. [2022-01-18 06:08:42,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 06:08:42,926 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:08:42,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:08:42,927 INFO L225 Difference]: With dead ends: 1119 [2022-01-18 06:08:42,927 INFO L226 Difference]: Without dead ends: 1070 [2022-01-18 06:08:42,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 36 SyntacticMatches, 11 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1577 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=449, Invalid=4807, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 06:08:42,928 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 127 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 1670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:08:42,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 547 Invalid, 1670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1382 Invalid, 0 Unknown, 247 Unchecked, 0.5s Time] [2022-01-18 06:08:42,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-01-18 06:08:42,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 850. [2022-01-18 06:08:42,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 2.0200235571260308) internal successors, (1715), 849 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:42,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1715 transitions. [2022-01-18 06:08:42,940 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1715 transitions. Word has length 33 [2022-01-18 06:08:42,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:08:42,940 INFO L470 AbstractCegarLoop]: Abstraction has 850 states and 1715 transitions. [2022-01-18 06:08:42,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:42,940 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1715 transitions. [2022-01-18 06:08:42,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:08:42,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:08:42,941 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:08:42,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-01-18 06:08:43,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-01-18 06:08:43,155 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:08:43,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:08:43,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1979273514, now seen corresponding path program 153 times [2022-01-18 06:08:43,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:08:43,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344976629] [2022-01-18 06:08:43,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:08:43,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:08:43,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:08:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:43,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:08:43,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344976629] [2022-01-18 06:08:43,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344976629] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:08:43,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804245377] [2022-01-18 06:08:43,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:08:43,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:08:43,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:08:43,445 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:08:43,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-01-18 06:08:43,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:08:43,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:08:43,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:08:43,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:08:43,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:08:43,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:08:43,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 06:08:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:44,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:08:44,573 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:08:44,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:08:44,638 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:44,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804245377] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:08:44,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:08:44,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:08:44,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410833323] [2022-01-18 06:08:44,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:08:44,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:08:44,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:08:44,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:08:44,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1552, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:08:44,639 INFO L87 Difference]: Start difference. First operand 850 states and 1715 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:46,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:08:46,165 INFO L93 Difference]: Finished difference Result 1134 states and 2262 transitions. [2022-01-18 06:08:46,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 06:08:46,166 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:08:46,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:08:46,167 INFO L225 Difference]: With dead ends: 1134 [2022-01-18 06:08:46,167 INFO L226 Difference]: Without dead ends: 1113 [2022-01-18 06:08:46,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=486, Invalid=5064, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 06:08:46,168 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 121 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:08:46,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 300 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1109 Invalid, 0 Unknown, 213 Unchecked, 0.5s Time] [2022-01-18 06:08:46,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2022-01-18 06:08:46,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 842. [2022-01-18 06:08:46,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 2.023781212841855) internal successors, (1702), 841 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:46,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1702 transitions. [2022-01-18 06:08:46,176 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1702 transitions. Word has length 33 [2022-01-18 06:08:46,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:08:46,176 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1702 transitions. [2022-01-18 06:08:46,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:46,176 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1702 transitions. [2022-01-18 06:08:46,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:08:46,191 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:08:46,192 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:08:46,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-01-18 06:08:46,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-01-18 06:08:46,392 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:08:46,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:08:46,392 INFO L85 PathProgramCache]: Analyzing trace with hash -300668212, now seen corresponding path program 154 times [2022-01-18 06:08:46,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:08:46,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422030422] [2022-01-18 06:08:46,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:08:46,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:08:46,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:08:46,694 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:46,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:08:46,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422030422] [2022-01-18 06:08:46,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422030422] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:08:46,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959947282] [2022-01-18 06:08:46,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:08:46,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:08:46,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:08:46,696 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:08:46,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-01-18 06:08:46,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:08:46,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:08:46,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:08:46,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:08:47,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:08:47,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:08:47,198 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 27 treesize of output 13 [2022-01-18 06:08:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:47,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:08:47,887 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:08:47,888 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 42 treesize of output 60 [2022-01-18 06:08:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:47,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959947282] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:08:47,941 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:08:47,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:08:47,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238859519] [2022-01-18 06:08:47,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:08:47,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:08:47,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:08:47,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:08:47,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1551, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:08:47,942 INFO L87 Difference]: Start difference. First operand 842 states and 1702 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:49,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:08:49,928 INFO L93 Difference]: Finished difference Result 1142 states and 2281 transitions. [2022-01-18 06:08:49,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 06:08:49,929 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:08:49,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:08:49,930 INFO L225 Difference]: With dead ends: 1142 [2022-01-18 06:08:49,930 INFO L226 Difference]: Without dead ends: 1098 [2022-01-18 06:08:49,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1846 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=539, Invalid=5623, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 06:08:49,931 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 172 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 2149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 391 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:08:49,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 515 Invalid, 2149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1701 Invalid, 0 Unknown, 391 Unchecked, 0.7s Time] [2022-01-18 06:08:49,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2022-01-18 06:08:49,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 843. [2022-01-18 06:08:49,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 2.02375296912114) internal successors, (1704), 842 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:49,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1704 transitions. [2022-01-18 06:08:49,939 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1704 transitions. Word has length 33 [2022-01-18 06:08:49,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:08:49,939 INFO L470 AbstractCegarLoop]: Abstraction has 843 states and 1704 transitions. [2022-01-18 06:08:49,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:49,939 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1704 transitions. [2022-01-18 06:08:49,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:08:49,940 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:08:49,940 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:08:49,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-01-18 06:08:50,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:08:50,152 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:08:50,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:08:50,152 INFO L85 PathProgramCache]: Analyzing trace with hash -941778802, now seen corresponding path program 155 times [2022-01-18 06:08:50,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:08:50,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983311603] [2022-01-18 06:08:50,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:08:50,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:08:50,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:08:50,434 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:50,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:08:50,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983311603] [2022-01-18 06:08:50,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983311603] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:08:50,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121895171] [2022-01-18 06:08:50,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:08:50,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:08:50,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:08:50,436 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:08:50,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-01-18 06:08:50,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:08:50,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:08:50,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 06:08:50,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:08:50,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:08:50,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:08:50,824 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 27 treesize of output 13 [2022-01-18 06:08:51,042 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:51,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:08:51,627 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:08:51,627 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 49 treesize of output 63 [2022-01-18 06:08:51,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:51,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121895171] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:08:51,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:08:51,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-01-18 06:08:51,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556194471] [2022-01-18 06:08:51,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:08:51,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 06:08:51,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:08:51,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 06:08:51,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1856, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 06:08:51,686 INFO L87 Difference]: Start difference. First operand 843 states and 1704 transitions. Second operand has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:54,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:08:54,767 INFO L93 Difference]: Finished difference Result 1518 states and 3033 transitions. [2022-01-18 06:08:54,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 06:08:54,768 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:08:54,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:08:54,770 INFO L225 Difference]: With dead ends: 1518 [2022-01-18 06:08:54,770 INFO L226 Difference]: Without dead ends: 1486 [2022-01-18 06:08:54,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3220 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=980, Invalid=9732, Unknown=0, NotChecked=0, Total=10712 [2022-01-18 06:08:54,771 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 204 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 1997 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 2438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 356 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:08:54,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 579 Invalid, 2438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1997 Invalid, 0 Unknown, 356 Unchecked, 0.8s Time] [2022-01-18 06:08:54,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2022-01-18 06:08:54,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 842. [2022-01-18 06:08:54,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 2.023781212841855) internal successors, (1702), 841 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:54,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1702 transitions. [2022-01-18 06:08:54,782 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1702 transitions. Word has length 33 [2022-01-18 06:08:54,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:08:54,782 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1702 transitions. [2022-01-18 06:08:54,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:54,782 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1702 transitions. [2022-01-18 06:08:54,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:08:54,783 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:08:54,783 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:08:54,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-01-18 06:08:54,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:08:54,984 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:08:54,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:08:54,984 INFO L85 PathProgramCache]: Analyzing trace with hash 484463564, now seen corresponding path program 156 times [2022-01-18 06:08:54,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:08:54,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325168350] [2022-01-18 06:08:54,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:08:54,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:08:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:08:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:55,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:08:55,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325168350] [2022-01-18 06:08:55,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325168350] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:08:55,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442950255] [2022-01-18 06:08:55,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:08:55,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:08:55,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:08:55,290 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:08:55,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-01-18 06:08:55,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:08:55,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:08:55,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 06:08:55,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:08:55,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:08:55,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:08:55,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:08:55,666 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 06:08:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:55,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:08:56,329 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:08:56,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:08:56,402 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:56,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442950255] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:08:56,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:08:56,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:08:56,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568785654] [2022-01-18 06:08:56,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:08:56,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:08:56,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:08:56,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:08:56,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1533, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:08:56,403 INFO L87 Difference]: Start difference. First operand 842 states and 1702 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:59,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:08:59,686 INFO L93 Difference]: Finished difference Result 1471 states and 2936 transitions. [2022-01-18 06:08:59,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-18 06:08:59,686 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:08:59,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:08:59,688 INFO L225 Difference]: With dead ends: 1471 [2022-01-18 06:08:59,688 INFO L226 Difference]: Without dead ends: 1428 [2022-01-18 06:08:59,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3670 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1268, Invalid=10288, Unknown=0, NotChecked=0, Total=11556 [2022-01-18 06:08:59,689 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 260 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 1878 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 2557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 534 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:08:59,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 506 Invalid, 2557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1878 Invalid, 0 Unknown, 534 Unchecked, 0.8s Time] [2022-01-18 06:08:59,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2022-01-18 06:08:59,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 847. [2022-01-18 06:08:59,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 2.023640661938534) internal successors, (1712), 846 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:59,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1712 transitions. [2022-01-18 06:08:59,699 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1712 transitions. Word has length 33 [2022-01-18 06:08:59,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:08:59,699 INFO L470 AbstractCegarLoop]: Abstraction has 847 states and 1712 transitions. [2022-01-18 06:08:59,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:59,699 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1712 transitions. [2022-01-18 06:08:59,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:08:59,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:08:59,700 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:08:59,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-01-18 06:08:59,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:08:59,901 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:08:59,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:08:59,901 INFO L85 PathProgramCache]: Analyzing trace with hash -430169182, now seen corresponding path program 157 times [2022-01-18 06:08:59,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:08:59,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31682930] [2022-01-18 06:08:59,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:08:59,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:08:59,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:00,182 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:00,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:00,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31682930] [2022-01-18 06:09:00,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31682930] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:09:00,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278207487] [2022-01-18 06:09:00,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:09:00,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:00,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:09:00,184 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:09:00,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-01-18 06:09:00,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:00,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:09:00,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:09:00,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:09:00,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:09:00,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 06:09:00,699 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:00,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:09:01,166 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:09:01,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:09:01,221 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:01,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278207487] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:09:01,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:09:01,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:09:01,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602259366] [2022-01-18 06:09:01,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:09:01,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:09:01,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:01,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:09:01,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1551, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:09:01,222 INFO L87 Difference]: Start difference. First operand 847 states and 1712 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:03,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:09:03,951 INFO L93 Difference]: Finished difference Result 1328 states and 2640 transitions. [2022-01-18 06:09:03,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 06:09:03,951 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:09:03,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:09:03,953 INFO L225 Difference]: With dead ends: 1328 [2022-01-18 06:09:03,953 INFO L226 Difference]: Without dead ends: 1251 [2022-01-18 06:09:03,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2593 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=926, Invalid=8776, Unknown=0, NotChecked=0, Total=9702 [2022-01-18 06:09:03,955 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 209 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 2357 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 2594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:09:03,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 526 Invalid, 2594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2357 Invalid, 0 Unknown, 108 Unchecked, 1.0s Time] [2022-01-18 06:09:03,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2022-01-18 06:09:03,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 861. [2022-01-18 06:09:03,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 2.0232558139534884) internal successors, (1740), 860 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:03,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1740 transitions. [2022-01-18 06:09:03,964 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1740 transitions. Word has length 33 [2022-01-18 06:09:03,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:09:03,965 INFO L470 AbstractCegarLoop]: Abstraction has 861 states and 1740 transitions. [2022-01-18 06:09:03,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:03,965 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1740 transitions. [2022-01-18 06:09:03,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:09:03,966 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:03,966 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:09:03,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2022-01-18 06:09:04,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:04,166 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:09:04,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:04,167 INFO L85 PathProgramCache]: Analyzing trace with hash -2013605696, now seen corresponding path program 158 times [2022-01-18 06:09:04,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:04,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798996051] [2022-01-18 06:09:04,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:04,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:04,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:04,433 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:04,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:04,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798996051] [2022-01-18 06:09:04,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798996051] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:09:04,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55691618] [2022-01-18 06:09:04,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:09:04,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:04,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:09:04,434 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:09:04,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-01-18 06:09:04,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:09:04,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:09:04,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:09:04,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:09:04,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:09:04,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:09:04,898 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 27 treesize of output 13 [2022-01-18 06:09:05,044 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:05,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:09:05,446 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:09:05,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:09:05,496 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:05,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55691618] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:09:05,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:09:05,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:09:05,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895137897] [2022-01-18 06:09:05,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:09:05,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:09:05,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:05,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:09:05,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1549, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:09:05,497 INFO L87 Difference]: Start difference. First operand 861 states and 1740 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:07,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:09:07,392 INFO L93 Difference]: Finished difference Result 1304 states and 2583 transitions. [2022-01-18 06:09:07,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 06:09:07,392 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:09:07,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:09:07,394 INFO L225 Difference]: With dead ends: 1304 [2022-01-18 06:09:07,394 INFO L226 Difference]: Without dead ends: 1274 [2022-01-18 06:09:07,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2642 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=634, Invalid=7556, Unknown=0, NotChecked=0, Total=8190 [2022-01-18 06:09:07,395 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 187 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 1594 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 2129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 467 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:09:07,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 480 Invalid, 2129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1594 Invalid, 0 Unknown, 467 Unchecked, 0.6s Time] [2022-01-18 06:09:07,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2022-01-18 06:09:07,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 934. [2022-01-18 06:09:07,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 2.0182207931404075) internal successors, (1883), 933 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:07,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1883 transitions. [2022-01-18 06:09:07,403 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1883 transitions. Word has length 33 [2022-01-18 06:09:07,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:09:07,404 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 1883 transitions. [2022-01-18 06:09:07,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:07,404 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1883 transitions. [2022-01-18 06:09:07,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:09:07,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:07,405 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:09:07,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-01-18 06:09:07,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:07,605 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:09:07,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:07,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1235832742, now seen corresponding path program 159 times [2022-01-18 06:09:07,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:07,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359268536] [2022-01-18 06:09:07,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:07,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:07,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:07,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:07,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359268536] [2022-01-18 06:09:07,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359268536] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:09:07,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466685336] [2022-01-18 06:09:07,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:09:07,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:07,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:09:07,868 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:09:07,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-01-18 06:09:07,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:09:07,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:09:07,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:09:07,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:09:08,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:09:08,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:09:08,279 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 27 treesize of output 13 [2022-01-18 06:09:08,423 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:08,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:09:08,825 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:09:08,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:09:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:08,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466685336] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:09:08,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:09:08,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:09:08,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74200153] [2022-01-18 06:09:08,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:09:08,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:09:08,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:08,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:09:08,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1549, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:09:08,885 INFO L87 Difference]: Start difference. First operand 934 states and 1883 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:11,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:09:11,137 INFO L93 Difference]: Finished difference Result 1308 states and 2605 transitions. [2022-01-18 06:09:11,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 06:09:11,138 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:09:11,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:09:11,139 INFO L225 Difference]: With dead ends: 1308 [2022-01-18 06:09:11,139 INFO L226 Difference]: Without dead ends: 1183 [2022-01-18 06:09:11,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 38 SyntacticMatches, 12 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2757 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=655, Invalid=7717, Unknown=0, NotChecked=0, Total=8372 [2022-01-18 06:09:11,140 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 195 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 1849 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 2193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:09:11,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 471 Invalid, 2193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1849 Invalid, 0 Unknown, 286 Unchecked, 0.8s Time] [2022-01-18 06:09:11,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2022-01-18 06:09:11,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 875. [2022-01-18 06:09:11,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.0274599542334095) internal successors, (1772), 874 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:11,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1772 transitions. [2022-01-18 06:09:11,148 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1772 transitions. Word has length 33 [2022-01-18 06:09:11,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:09:11,148 INFO L470 AbstractCegarLoop]: Abstraction has 875 states and 1772 transitions. [2022-01-18 06:09:11,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:11,148 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1772 transitions. [2022-01-18 06:09:11,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:09:11,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:11,149 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:09:11,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-01-18 06:09:11,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:11,349 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:09:11,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:11,350 INFO L85 PathProgramCache]: Analyzing trace with hash -627983106, now seen corresponding path program 160 times [2022-01-18 06:09:11,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:11,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163940194] [2022-01-18 06:09:11,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:11,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:11,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:11,624 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:11,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:11,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163940194] [2022-01-18 06:09:11,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163940194] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:09:11,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419896262] [2022-01-18 06:09:11,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:09:11,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:11,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:09:11,625 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:09:11,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-01-18 06:09:11,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:09:11,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:09:11,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:09:11,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:09:12,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:09:12,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:09:12,079 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 27 treesize of output 13 [2022-01-18 06:09:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:12,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:09:12,632 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:09:12,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:09:12,688 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:12,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419896262] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:09:12,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:09:12,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:09:12,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077133457] [2022-01-18 06:09:12,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:09:12,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:09:12,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:12,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:09:12,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:09:12,689 INFO L87 Difference]: Start difference. First operand 875 states and 1772 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:15,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:09:15,590 INFO L93 Difference]: Finished difference Result 1382 states and 2756 transitions. [2022-01-18 06:09:15,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 06:09:15,590 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:09:15,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:09:15,592 INFO L225 Difference]: With dead ends: 1382 [2022-01-18 06:09:15,592 INFO L226 Difference]: Without dead ends: 1294 [2022-01-18 06:09:15,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 36 SyntacticMatches, 14 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3387 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=808, Invalid=9092, Unknown=0, NotChecked=0, Total=9900 [2022-01-18 06:09:15,593 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 188 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 2252 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 3118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 793 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:09:15,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 540 Invalid, 3118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2252 Invalid, 0 Unknown, 793 Unchecked, 0.9s Time] [2022-01-18 06:09:15,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2022-01-18 06:09:15,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 876. [2022-01-18 06:09:15,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.0274285714285716) internal successors, (1774), 875 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:15,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1774 transitions. [2022-01-18 06:09:15,602 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1774 transitions. Word has length 33 [2022-01-18 06:09:15,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:09:15,603 INFO L470 AbstractCegarLoop]: Abstraction has 876 states and 1774 transitions. [2022-01-18 06:09:15,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:15,603 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1774 transitions. [2022-01-18 06:09:15,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:09:15,604 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:15,604 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:09:15,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-01-18 06:09:15,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2022-01-18 06:09:15,804 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:09:15,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:15,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1269093696, now seen corresponding path program 161 times [2022-01-18 06:09:15,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:15,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936997589] [2022-01-18 06:09:15,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:15,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:16,109 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:16,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:16,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936997589] [2022-01-18 06:09:16,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936997589] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:09:16,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439371556] [2022-01-18 06:09:16,109 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:09:16,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:16,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:09:16,111 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:09:16,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-01-18 06:09:16,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:09:16,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:09:16,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 06:09:16,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:09:16,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:09:16,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:09:16,505 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 27 treesize of output 13 [2022-01-18 06:09:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:16,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:09:17,361 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:09:17,361 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 49 treesize of output 63 [2022-01-18 06:09:17,432 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:17,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439371556] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:09:17,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:09:17,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-01-18 06:09:17,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246967491] [2022-01-18 06:09:17,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:09:17,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 06:09:17,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:17,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 06:09:17,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 06:09:17,434 INFO L87 Difference]: Start difference. First operand 876 states and 1774 transitions. Second operand has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:22,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:09:22,736 INFO L93 Difference]: Finished difference Result 1697 states and 3376 transitions. [2022-01-18 06:09:22,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-18 06:09:22,737 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:09:22,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:09:22,739 INFO L225 Difference]: With dead ends: 1697 [2022-01-18 06:09:22,739 INFO L226 Difference]: Without dead ends: 1621 [2022-01-18 06:09:22,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 34 SyntacticMatches, 9 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6161 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1618, Invalid=16742, Unknown=0, NotChecked=0, Total=18360 [2022-01-18 06:09:22,741 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 312 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 2970 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 3497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 2970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 352 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:09:22,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 609 Invalid, 3497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 2970 Invalid, 0 Unknown, 352 Unchecked, 1.4s Time] [2022-01-18 06:09:22,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2022-01-18 06:09:22,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 887. [2022-01-18 06:09:22,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 2.0316027088036117) internal successors, (1800), 886 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:22,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1800 transitions. [2022-01-18 06:09:22,751 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1800 transitions. Word has length 33 [2022-01-18 06:09:22,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:09:22,751 INFO L470 AbstractCegarLoop]: Abstraction has 887 states and 1800 transitions. [2022-01-18 06:09:22,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:22,752 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1800 transitions. [2022-01-18 06:09:22,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:09:22,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:22,752 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:09:22,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-01-18 06:09:22,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-01-18 06:09:22,953 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:09:22,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:22,953 INFO L85 PathProgramCache]: Analyzing trace with hash 157148670, now seen corresponding path program 162 times [2022-01-18 06:09:22,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:22,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110604383] [2022-01-18 06:09:22,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:22,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:22,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:23,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:23,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110604383] [2022-01-18 06:09:23,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110604383] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:09:23,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760784379] [2022-01-18 06:09:23,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:09:23,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:23,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:09:23,237 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:09:23,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-01-18 06:09:23,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:09:23,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:09:23,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 06:09:23,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:09:23,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:09:23,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:09:23,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 06:09:23,806 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:23,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:09:24,300 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:09:24,300 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 42 treesize of output 60 [2022-01-18 06:09:24,356 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:24,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760784379] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:09:24,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:09:24,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:09:24,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940496338] [2022-01-18 06:09:24,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:09:24,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:09:24,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:24,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:09:24,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1538, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:09:24,357 INFO L87 Difference]: Start difference. First operand 887 states and 1800 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:27,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:09:27,866 INFO L93 Difference]: Finished difference Result 1477 states and 2950 transitions. [2022-01-18 06:09:27,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 06:09:27,867 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:09:27,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:09:27,869 INFO L225 Difference]: With dead ends: 1477 [2022-01-18 06:09:27,869 INFO L226 Difference]: Without dead ends: 1449 [2022-01-18 06:09:27,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 37 SyntacticMatches, 13 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3771 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1231, Invalid=10111, Unknown=0, NotChecked=0, Total=11342 [2022-01-18 06:09:27,870 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 222 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 1516 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 2036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 387 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:09:27,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 408 Invalid, 2036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1516 Invalid, 0 Unknown, 387 Unchecked, 0.7s Time] [2022-01-18 06:09:27,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2022-01-18 06:09:27,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 887. [2022-01-18 06:09:27,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 2.0316027088036117) internal successors, (1800), 886 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:27,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1800 transitions. [2022-01-18 06:09:27,882 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1800 transitions. Word has length 33 [2022-01-18 06:09:27,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:09:27,882 INFO L470 AbstractCegarLoop]: Abstraction has 887 states and 1800 transitions. [2022-01-18 06:09:27,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:27,882 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1800 transitions. [2022-01-18 06:09:27,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:09:27,883 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:27,883 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:09:27,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-01-18 06:09:28,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-01-18 06:09:28,097 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:09:28,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:28,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1437769234, now seen corresponding path program 163 times [2022-01-18 06:09:28,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:28,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284655063] [2022-01-18 06:09:28,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:28,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:28,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:28,380 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:28,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:28,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284655063] [2022-01-18 06:09:28,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284655063] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:09:28,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887390710] [2022-01-18 06:09:28,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:09:28,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:28,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:09:28,382 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:09:28,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-01-18 06:09:28,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:28,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:09:28,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:09:28,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:09:28,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:09:28,823 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 27 treesize of output 13 [2022-01-18 06:09:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:28,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:09:29,449 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:09:29,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:09:29,510 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:29,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887390710] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:09:29,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:09:29,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:09:29,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001976886] [2022-01-18 06:09:29,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:09:29,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:09:29,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:29,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:09:29,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1551, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:09:29,511 INFO L87 Difference]: Start difference. First operand 887 states and 1800 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:32,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:09:32,026 INFO L93 Difference]: Finished difference Result 1299 states and 2591 transitions. [2022-01-18 06:09:32,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 06:09:32,026 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:09:32,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:09:32,027 INFO L225 Difference]: With dead ends: 1299 [2022-01-18 06:09:32,028 INFO L226 Difference]: Without dead ends: 1221 [2022-01-18 06:09:32,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 40 SyntacticMatches, 11 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2781 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=734, Invalid=8386, Unknown=0, NotChecked=0, Total=9120 [2022-01-18 06:09:32,028 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 189 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 1755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 278 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:09:32,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 397 Invalid, 1755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1418 Invalid, 0 Unknown, 278 Unchecked, 0.6s Time] [2022-01-18 06:09:32,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2022-01-18 06:09:32,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 903. [2022-01-18 06:09:32,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 2.0277161862527717) internal successors, (1829), 902 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:32,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1829 transitions. [2022-01-18 06:09:32,038 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1829 transitions. Word has length 33 [2022-01-18 06:09:32,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:09:32,038 INFO L470 AbstractCegarLoop]: Abstraction has 903 states and 1829 transitions. [2022-01-18 06:09:32,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:32,039 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1829 transitions. [2022-01-18 06:09:32,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:09:32,040 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:32,040 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:09:32,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2022-01-18 06:09:32,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-01-18 06:09:32,259 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:09:32,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:32,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1706912120, now seen corresponding path program 164 times [2022-01-18 06:09:32,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:32,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259177698] [2022-01-18 06:09:32,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:32,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:32,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:32,577 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:32,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:32,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259177698] [2022-01-18 06:09:32,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259177698] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:09:32,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848831360] [2022-01-18 06:09:32,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:09:32,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:32,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:09:32,579 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:09:32,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-01-18 06:09:32,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:09:32,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:09:32,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:09:32,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:09:33,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:09:33,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:09:33,075 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 27 treesize of output 13 [2022-01-18 06:09:33,241 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:33,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:09:33,700 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:09:33,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:09:33,752 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:33,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848831360] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:09:33,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:09:33,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:09:33,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191650217] [2022-01-18 06:09:33,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:09:33,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:09:33,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:33,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:09:33,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1551, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:09:33,753 INFO L87 Difference]: Start difference. First operand 903 states and 1829 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:36,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:09:36,507 INFO L93 Difference]: Finished difference Result 1326 states and 2635 transitions. [2022-01-18 06:09:36,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 06:09:36,507 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:09:36,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:09:36,509 INFO L225 Difference]: With dead ends: 1326 [2022-01-18 06:09:36,509 INFO L226 Difference]: Without dead ends: 1263 [2022-01-18 06:09:36,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2598 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=674, Invalid=7882, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 06:09:36,510 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 142 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 2512 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 3166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 594 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:09:36,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 653 Invalid, 3166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2512 Invalid, 0 Unknown, 594 Unchecked, 1.0s Time] [2022-01-18 06:09:36,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2022-01-18 06:09:36,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 897. [2022-01-18 06:09:36,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 2.0301339285714284) internal successors, (1819), 896 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:36,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1819 transitions. [2022-01-18 06:09:36,521 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1819 transitions. Word has length 33 [2022-01-18 06:09:36,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:09:36,521 INFO L470 AbstractCegarLoop]: Abstraction has 897 states and 1819 transitions. [2022-01-18 06:09:36,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:36,521 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1819 transitions. [2022-01-18 06:09:36,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:09:36,522 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:36,522 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:09:36,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-01-18 06:09:36,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-01-18 06:09:36,731 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:09:36,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:36,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1176800460, now seen corresponding path program 165 times [2022-01-18 06:09:36,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:36,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120925839] [2022-01-18 06:09:36,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:36,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:37,006 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:37,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:37,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120925839] [2022-01-18 06:09:37,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120925839] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:09:37,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642779318] [2022-01-18 06:09:37,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:09:37,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:37,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:09:37,008 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:09:37,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-01-18 06:09:37,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:09:37,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:09:37,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:09:37,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:09:37,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:09:37,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:09:37,442 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 27 treesize of output 13 [2022-01-18 06:09:37,605 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:37,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:09:38,009 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:09:38,010 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 42 treesize of output 60 [2022-01-18 06:09:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:38,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642779318] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:09:38,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:09:38,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:09:38,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921340738] [2022-01-18 06:09:38,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:09:38,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:09:38,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:38,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:09:38,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1551, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:09:38,060 INFO L87 Difference]: Start difference. First operand 897 states and 1819 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:40,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:09:40,406 INFO L93 Difference]: Finished difference Result 1298 states and 2587 transitions. [2022-01-18 06:09:40,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 06:09:40,406 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:09:40,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:09:40,408 INFO L225 Difference]: With dead ends: 1298 [2022-01-18 06:09:40,408 INFO L226 Difference]: Without dead ends: 1234 [2022-01-18 06:09:40,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2473 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=695, Invalid=7861, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 06:09:40,408 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 171 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 1695 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 2333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 580 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:09:40,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 462 Invalid, 2333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1695 Invalid, 0 Unknown, 580 Unchecked, 0.7s Time] [2022-01-18 06:09:40,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2022-01-18 06:09:40,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 893. [2022-01-18 06:09:40,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 2.0280269058295963) internal successors, (1809), 892 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:40,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1809 transitions. [2022-01-18 06:09:40,417 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1809 transitions. Word has length 33 [2022-01-18 06:09:40,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:09:40,417 INFO L470 AbstractCegarLoop]: Abstraction has 893 states and 1809 transitions. [2022-01-18 06:09:40,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:40,417 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1809 transitions. [2022-01-18 06:09:40,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:09:40,418 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:40,418 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:09:40,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2022-01-18 06:09:40,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:40,634 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:09:40,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:40,635 INFO L85 PathProgramCache]: Analyzing trace with hash -2078879824, now seen corresponding path program 166 times [2022-01-18 06:09:40,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:40,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155905480] [2022-01-18 06:09:40,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:40,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:40,907 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:40,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:40,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155905480] [2022-01-18 06:09:40,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155905480] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:09:40,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258018595] [2022-01-18 06:09:40,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:09:40,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:40,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:09:40,908 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:09:40,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-01-18 06:09:40,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:09:40,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:09:40,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:09:40,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:09:41,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:09:41,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:09:41,249 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 27 treesize of output 13 [2022-01-18 06:09:41,424 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:41,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:09:41,824 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:09:41,824 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 42 treesize of output 60 [2022-01-18 06:09:41,877 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:41,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258018595] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:09:41,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:09:41,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:09:41,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594407043] [2022-01-18 06:09:41,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:09:41,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:09:41,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:41,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:09:41,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1539, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:09:41,878 INFO L87 Difference]: Start difference. First operand 893 states and 1809 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:45,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:09:45,670 INFO L93 Difference]: Finished difference Result 1570 states and 3126 transitions. [2022-01-18 06:09:45,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-18 06:09:45,671 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:09:45,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:09:45,672 INFO L225 Difference]: With dead ends: 1570 [2022-01-18 06:09:45,672 INFO L226 Difference]: Without dead ends: 1466 [2022-01-18 06:09:45,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 40 SyntacticMatches, 10 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4895 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1536, Invalid=13716, Unknown=0, NotChecked=0, Total=15252 [2022-01-18 06:09:45,674 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 282 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 2057 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 2456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 2057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:09:45,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 375 Invalid, 2456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 2057 Invalid, 0 Unknown, 222 Unchecked, 0.9s Time] [2022-01-18 06:09:45,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2022-01-18 06:09:45,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 898. [2022-01-18 06:09:45,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 2.0267558528428093) internal successors, (1818), 897 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:45,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1818 transitions. [2022-01-18 06:09:45,684 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1818 transitions. Word has length 33 [2022-01-18 06:09:45,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:09:45,684 INFO L470 AbstractCegarLoop]: Abstraction has 898 states and 1818 transitions. [2022-01-18 06:09:45,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:45,684 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1818 transitions. [2022-01-18 06:09:45,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:09:45,685 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:45,685 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:09:45,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-01-18 06:09:45,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:45,885 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:09:45,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:45,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1076059558, now seen corresponding path program 167 times [2022-01-18 06:09:45,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:45,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845668488] [2022-01-18 06:09:45,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:45,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:45,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:46,141 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:46,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:46,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845668488] [2022-01-18 06:09:46,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845668488] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:09:46,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721125739] [2022-01-18 06:09:46,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:09:46,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:46,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:09:46,142 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:09:46,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-01-18 06:09:46,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:09:46,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:09:46,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 06:09:46,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:09:46,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:09:46,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:09:46,449 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 27 treesize of output 13 [2022-01-18 06:09:46,701 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:46,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:09:47,289 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:09:47,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 63 [2022-01-18 06:09:47,363 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:47,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721125739] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:09:47,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:09:47,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-01-18 06:09:47,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248258482] [2022-01-18 06:09:47,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:09:47,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 06:09:47,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:47,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 06:09:47,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1862, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 06:09:47,364 INFO L87 Difference]: Start difference. First operand 898 states and 1818 transitions. Second operand has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:52,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:09:52,303 INFO L93 Difference]: Finished difference Result 1643 states and 3255 transitions. [2022-01-18 06:09:52,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-18 06:09:52,303 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:09:52,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:09:52,305 INFO L225 Difference]: With dead ends: 1643 [2022-01-18 06:09:52,305 INFO L226 Difference]: Without dead ends: 1513 [2022-01-18 06:09:52,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5872 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1665, Invalid=16695, Unknown=0, NotChecked=0, Total=18360 [2022-01-18 06:09:52,307 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 355 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 2796 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 3118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 2796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:09:52,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 444 Invalid, 3118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 2796 Invalid, 0 Unknown, 35 Unchecked, 1.3s Time] [2022-01-18 06:09:52,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2022-01-18 06:09:52,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 957. [2022-01-18 06:09:52,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 2.032426778242678) internal successors, (1943), 956 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:52,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1943 transitions. [2022-01-18 06:09:52,317 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1943 transitions. Word has length 33 [2022-01-18 06:09:52,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:09:52,317 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 1943 transitions. [2022-01-18 06:09:52,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:52,317 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1943 transitions. [2022-01-18 06:09:52,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:09:52,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:52,318 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:09:52,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2022-01-18 06:09:52,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2022-01-18 06:09:52,518 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:09:52,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:52,519 INFO L85 PathProgramCache]: Analyzing trace with hash -757484076, now seen corresponding path program 168 times [2022-01-18 06:09:52,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:52,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740131078] [2022-01-18 06:09:52,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:52,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:52,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:52,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:52,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740131078] [2022-01-18 06:09:52,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740131078] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:09:52,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590259790] [2022-01-18 06:09:52,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:09:52,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:52,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:09:52,797 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:09:52,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-01-18 06:09:52,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:09:52,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:09:52,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 06:09:52,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:09:53,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:09:53,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:09:53,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:09:53,115 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 06:09:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:53,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:09:53,737 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:09:53,737 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 42 treesize of output 60 [2022-01-18 06:09:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:53,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590259790] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:09:53,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:09:53,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:09:53,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033621139] [2022-01-18 06:09:53,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:09:53,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:09:53,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:53,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:09:53,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:09:53,795 INFO L87 Difference]: Start difference. First operand 957 states and 1943 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:57,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:09:57,599 INFO L93 Difference]: Finished difference Result 1620 states and 3221 transitions. [2022-01-18 06:09:57,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-18 06:09:57,600 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:09:57,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:09:57,601 INFO L225 Difference]: With dead ends: 1620 [2022-01-18 06:09:57,601 INFO L226 Difference]: Without dead ends: 1503 [2022-01-18 06:09:57,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4764 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1406, Invalid=14344, Unknown=0, NotChecked=0, Total=15750 [2022-01-18 06:09:57,603 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 242 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 3361 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 3694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 3361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:09:57,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 643 Invalid, 3694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 3361 Invalid, 0 Unknown, 180 Unchecked, 1.2s Time] [2022-01-18 06:09:57,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1503 states. [2022-01-18 06:09:57,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1503 to 982. [2022-01-18 06:09:57,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 2.0336391437308867) internal successors, (1995), 981 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:57,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1995 transitions. [2022-01-18 06:09:57,613 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1995 transitions. Word has length 33 [2022-01-18 06:09:57,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:09:57,613 INFO L470 AbstractCegarLoop]: Abstraction has 982 states and 1995 transitions. [2022-01-18 06:09:57,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:57,613 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1995 transitions. [2022-01-18 06:09:57,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:09:57,614 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:57,614 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:09:57,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2022-01-18 06:09:57,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:57,814 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:09:57,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:57,815 INFO L85 PathProgramCache]: Analyzing trace with hash 469014850, now seen corresponding path program 169 times [2022-01-18 06:09:57,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:57,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913810445] [2022-01-18 06:09:57,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:57,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:58,094 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:58,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:58,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913810445] [2022-01-18 06:09:58,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913810445] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:09:58,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525150943] [2022-01-18 06:09:58,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:09:58,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:58,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:09:58,095 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:09:58,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-01-18 06:09:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:58,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:09:58,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:09:58,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:09:58,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:09:58,517 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 27 treesize of output 13 [2022-01-18 06:09:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:58,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:09:59,085 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:09:59,086 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 42 treesize of output 60 [2022-01-18 06:09:59,146 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:59,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525150943] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:09:59,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:09:59,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:09:59,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744756206] [2022-01-18 06:09:59,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:09:59,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:09:59,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:59,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:09:59,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:09:59,147 INFO L87 Difference]: Start difference. First operand 982 states and 1995 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:02,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:10:02,666 INFO L93 Difference]: Finished difference Result 1688 states and 3361 transitions. [2022-01-18 06:10:02,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-18 06:10:02,666 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:10:02,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:10:02,668 INFO L225 Difference]: With dead ends: 1688 [2022-01-18 06:10:02,668 INFO L226 Difference]: Without dead ends: 1550 [2022-01-18 06:10:02,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 41 SyntacticMatches, 14 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4190 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1119, Invalid=11537, Unknown=0, NotChecked=0, Total=12656 [2022-01-18 06:10:02,669 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 214 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 2388 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 2980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 488 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:10:02,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 485 Invalid, 2980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2388 Invalid, 0 Unknown, 488 Unchecked, 1.0s Time] [2022-01-18 06:10:02,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2022-01-18 06:10:02,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 1057. [2022-01-18 06:10:02,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1056 states have (on average 2.034090909090909) internal successors, (2148), 1056 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:02,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 2148 transitions. [2022-01-18 06:10:02,683 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 2148 transitions. Word has length 33 [2022-01-18 06:10:02,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:10:02,683 INFO L470 AbstractCegarLoop]: Abstraction has 1057 states and 2148 transitions. [2022-01-18 06:10:02,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:02,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 2148 transitions. [2022-01-18 06:10:02,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:10:02,685 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:10:02,685 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:10:02,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2022-01-18 06:10:02,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:02,886 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:10:02,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:10:02,886 INFO L85 PathProgramCache]: Analyzing trace with hash -21774050, now seen corresponding path program 170 times [2022-01-18 06:10:02,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:10:02,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729910455] [2022-01-18 06:10:02,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:10:02,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:10:02,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:10:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:03,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:10:03,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729910455] [2022-01-18 06:10:03,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729910455] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:10:03,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28602842] [2022-01-18 06:10:03,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:10:03,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:03,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:10:03,172 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:10:03,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-01-18 06:10:03,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:10:03,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:10:03,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:10:03,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:10:03,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:03,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:03,517 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 27 treesize of output 13 [2022-01-18 06:10:03,706 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:03,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:10:04,114 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:10:04,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:10:04,171 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:04,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28602842] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:10:04,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:10:04,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:10:04,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956139522] [2022-01-18 06:10:04,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:10:04,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:10:04,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:10:04,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:10:04,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:10:04,172 INFO L87 Difference]: Start difference. First operand 1057 states and 2148 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:08,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:10:08,544 INFO L93 Difference]: Finished difference Result 1804 states and 3584 transitions. [2022-01-18 06:10:08,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-18 06:10:08,544 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:10:08,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:10:08,546 INFO L225 Difference]: With dead ends: 1804 [2022-01-18 06:10:08,546 INFO L226 Difference]: Without dead ends: 1674 [2022-01-18 06:10:08,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6527 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1679, Invalid=17781, Unknown=0, NotChecked=0, Total=19460 [2022-01-18 06:10:08,548 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 372 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 3362 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 4003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 3362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 446 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:10:08,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 833 Invalid, 4003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 3362 Invalid, 0 Unknown, 446 Unchecked, 1.3s Time] [2022-01-18 06:10:08,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2022-01-18 06:10:08,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1152. [2022-01-18 06:10:08,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 2.0321459600347525) internal successors, (2339), 1151 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:08,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 2339 transitions. [2022-01-18 06:10:08,567 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 2339 transitions. Word has length 33 [2022-01-18 06:10:08,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:10:08,567 INFO L470 AbstractCegarLoop]: Abstraction has 1152 states and 2339 transitions. [2022-01-18 06:10:08,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:08,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 2339 transitions. [2022-01-18 06:10:08,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:10:08,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:10:08,568 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:10:08,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2022-01-18 06:10:08,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2022-01-18 06:10:08,769 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:10:08,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:10:08,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1284545878, now seen corresponding path program 171 times [2022-01-18 06:10:08,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:10:08,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267418272] [2022-01-18 06:10:08,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:10:08,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:10:08,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:10:09,047 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:09,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:10:09,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267418272] [2022-01-18 06:10:09,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267418272] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:10:09,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730187575] [2022-01-18 06:10:09,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:10:09,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:09,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:10:09,048 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:10:09,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-01-18 06:10:09,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:10:09,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:10:09,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:10:09,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:10:09,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:09,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:09,478 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 27 treesize of output 13 [2022-01-18 06:10:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:09,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:10:10,028 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:10:10,028 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 42 treesize of output 60 [2022-01-18 06:10:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:10,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730187575] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:10:10,077 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:10:10,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:10:10,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62051166] [2022-01-18 06:10:10,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:10:10,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:10:10,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:10:10,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:10:10,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1544, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:10:10,078 INFO L87 Difference]: Start difference. First operand 1152 states and 2339 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:12,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:10:12,099 INFO L93 Difference]: Finished difference Result 1609 states and 3210 transitions. [2022-01-18 06:10:12,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 06:10:12,099 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:10:12,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:10:12,101 INFO L225 Difference]: With dead ends: 1609 [2022-01-18 06:10:12,101 INFO L226 Difference]: Without dead ends: 1580 [2022-01-18 06:10:12,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 39 SyntacticMatches, 11 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2798 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=750, Invalid=7806, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 06:10:12,102 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 175 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1570 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 1824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:10:12,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 555 Invalid, 1824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1570 Invalid, 0 Unknown, 163 Unchecked, 0.6s Time] [2022-01-18 06:10:12,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2022-01-18 06:10:12,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1230. [2022-01-18 06:10:12,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 2.0268510984540278) internal successors, (2491), 1229 states have internal predecessors, (2491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:12,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 2491 transitions. [2022-01-18 06:10:12,113 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 2491 transitions. Word has length 33 [2022-01-18 06:10:12,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:10:12,113 INFO L470 AbstractCegarLoop]: Abstraction has 1230 states and 2491 transitions. [2022-01-18 06:10:12,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:12,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 2491 transitions. [2022-01-18 06:10:12,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:10:12,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:10:12,115 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:10:12,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2022-01-18 06:10:12,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:12,315 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:10:12,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:10:12,315 INFO L85 PathProgramCache]: Analyzing trace with hash 508159906, now seen corresponding path program 172 times [2022-01-18 06:10:12,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:10:12,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884903534] [2022-01-18 06:10:12,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:10:12,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:10:12,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:10:12,584 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:12,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:10:12,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884903534] [2022-01-18 06:10:12,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884903534] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:10:12,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053532252] [2022-01-18 06:10:12,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:10:12,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:12,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:10:12,585 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:10:12,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-01-18 06:10:12,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:10:12,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:10:12,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:10:12,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:10:13,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:13,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:13,015 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 27 treesize of output 13 [2022-01-18 06:10:13,156 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:13,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:10:13,556 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:10:13,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:10:13,623 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:13,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053532252] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:10:13,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:10:13,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:10:13,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577985429] [2022-01-18 06:10:13,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:10:13,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:10:13,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:10:13,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:10:13,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1544, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:10:13,624 INFO L87 Difference]: Start difference. First operand 1230 states and 2491 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:15,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:10:15,649 INFO L93 Difference]: Finished difference Result 1609 states and 3206 transitions. [2022-01-18 06:10:15,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 06:10:15,650 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:10:15,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:10:15,652 INFO L225 Difference]: With dead ends: 1609 [2022-01-18 06:10:15,652 INFO L226 Difference]: Without dead ends: 1540 [2022-01-18 06:10:15,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 41 SyntacticMatches, 12 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3056 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=776, Invalid=8344, Unknown=0, NotChecked=0, Total=9120 [2022-01-18 06:10:15,653 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 218 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 1571 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:10:15,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 480 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1571 Invalid, 0 Unknown, 207 Unchecked, 0.6s Time] [2022-01-18 06:10:15,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2022-01-18 06:10:15,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 1229. [2022-01-18 06:10:15,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 1228 states have (on average 2.022801302931596) internal successors, (2484), 1228 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:15,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 2484 transitions. [2022-01-18 06:10:15,664 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 2484 transitions. Word has length 33 [2022-01-18 06:10:15,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:10:15,664 INFO L470 AbstractCegarLoop]: Abstraction has 1229 states and 2484 transitions. [2022-01-18 06:10:15,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:15,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 2484 transitions. [2022-01-18 06:10:15,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:10:15,665 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:10:15,665 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:10:15,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2022-01-18 06:10:15,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:15,865 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:10:15,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:10:15,866 INFO L85 PathProgramCache]: Analyzing trace with hash 239017020, now seen corresponding path program 173 times [2022-01-18 06:10:15,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:10:15,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70227181] [2022-01-18 06:10:15,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:10:15,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:10:15,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:10:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:16,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:10:16,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70227181] [2022-01-18 06:10:16,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70227181] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:10:16,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572286653] [2022-01-18 06:10:16,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:10:16,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:16,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:10:16,136 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:10:16,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-01-18 06:10:16,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:10:16,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:10:16,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 06:10:16,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:10:16,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:16,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:16,553 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 06:10:16,701 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:16,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:10:17,130 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:10:17,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:10:17,199 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:17,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572286653] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:10:17,199 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:10:17,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:10:17,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267028519] [2022-01-18 06:10:17,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:10:17,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:10:17,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:10:17,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:10:17,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1544, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:10:17,200 INFO L87 Difference]: Start difference. First operand 1229 states and 2484 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:19,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:10:19,229 INFO L93 Difference]: Finished difference Result 1709 states and 3406 transitions. [2022-01-18 06:10:19,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 06:10:19,230 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:10:19,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:10:19,231 INFO L225 Difference]: With dead ends: 1709 [2022-01-18 06:10:19,232 INFO L226 Difference]: Without dead ends: 1577 [2022-01-18 06:10:19,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2681 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=771, Invalid=7785, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 06:10:19,233 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 230 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 1757 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 2154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:10:19,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 448 Invalid, 2154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1757 Invalid, 0 Unknown, 310 Unchecked, 0.7s Time] [2022-01-18 06:10:19,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1577 states. [2022-01-18 06:10:19,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1577 to 1200. [2022-01-18 06:10:19,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 2.029190992493745) internal successors, (2433), 1199 states have internal predecessors, (2433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:19,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 2433 transitions. [2022-01-18 06:10:19,244 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 2433 transitions. Word has length 33 [2022-01-18 06:10:19,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:10:19,245 INFO L470 AbstractCegarLoop]: Abstraction has 1200 states and 2433 transitions. [2022-01-18 06:10:19,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:19,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 2433 transitions. [2022-01-18 06:10:19,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:10:19,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:10:19,246 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:10:19,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-01-18 06:10:19,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:19,462 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:10:19,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:10:19,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1624798828, now seen corresponding path program 174 times [2022-01-18 06:10:19,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:10:19,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124279221] [2022-01-18 06:10:19,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:10:19,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:10:19,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:10:19,708 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:19,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:10:19,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124279221] [2022-01-18 06:10:19,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124279221] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:10:19,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75626936] [2022-01-18 06:10:19,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:10:19,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:19,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:10:19,710 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:10:19,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-01-18 06:10:19,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:10:19,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:10:19,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:10:19,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:10:20,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:20,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:20,191 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 06:10:20,328 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:20,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:10:20,831 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:10:20,831 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 47 treesize of output 63 [2022-01-18 06:10:20,896 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:20,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75626936] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:10:20,897 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:10:20,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-01-18 06:10:20,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496443405] [2022-01-18 06:10:20,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:10:20,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 06:10:20,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:10:20,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 06:10:20,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1855, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 06:10:20,897 INFO L87 Difference]: Start difference. First operand 1200 states and 2433 transitions. Second operand has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:24,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:10:24,284 INFO L93 Difference]: Finished difference Result 1764 states and 3518 transitions. [2022-01-18 06:10:24,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-18 06:10:24,285 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:10:24,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:10:24,287 INFO L225 Difference]: With dead ends: 1764 [2022-01-18 06:10:24,287 INFO L226 Difference]: Without dead ends: 1664 [2022-01-18 06:10:24,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 33 SyntacticMatches, 13 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4677 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1122, Invalid=12218, Unknown=0, NotChecked=0, Total=13340 [2022-01-18 06:10:24,288 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 356 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 2981 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 3407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 2981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:10:24,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 662 Invalid, 3407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 2981 Invalid, 0 Unknown, 268 Unchecked, 1.1s Time] [2022-01-18 06:10:24,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2022-01-18 06:10:24,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1206. [2022-01-18 06:10:24,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 2.029045643153527) internal successors, (2445), 1205 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:24,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 2445 transitions. [2022-01-18 06:10:24,300 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 2445 transitions. Word has length 33 [2022-01-18 06:10:24,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:10:24,300 INFO L470 AbstractCegarLoop]: Abstraction has 1206 states and 2445 transitions. [2022-01-18 06:10:24,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:24,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 2445 transitions. [2022-01-18 06:10:24,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:10:24,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:10:24,301 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:10:24,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2022-01-18 06:10:24,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-01-18 06:10:24,502 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:10:24,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:10:24,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1253520918, now seen corresponding path program 175 times [2022-01-18 06:10:24,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:10:24,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886468802] [2022-01-18 06:10:24,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:10:24,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:10:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:10:24,761 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:24,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:10:24,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886468802] [2022-01-18 06:10:24,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886468802] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:10:24,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579735956] [2022-01-18 06:10:24,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:10:24,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:24,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:10:24,762 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:10:24,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-01-18 06:10:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:10:24,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:10:24,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:10:25,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:25,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:25,189 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 27 treesize of output 13 [2022-01-18 06:10:25,325 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:25,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:10:25,726 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:10:25,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:10:25,773 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:25,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579735956] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:10:25,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:10:25,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:10:25,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963250748] [2022-01-18 06:10:25,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:10:25,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:10:25,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:10:25,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:10:25,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1546, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:10:25,774 INFO L87 Difference]: Start difference. First operand 1206 states and 2445 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:28,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:10:28,130 INFO L93 Difference]: Finished difference Result 1801 states and 3617 transitions. [2022-01-18 06:10:28,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 06:10:28,131 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:10:28,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:10:28,133 INFO L225 Difference]: With dead ends: 1801 [2022-01-18 06:10:28,133 INFO L226 Difference]: Without dead ends: 1725 [2022-01-18 06:10:28,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3871 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1015, Invalid=10757, Unknown=0, NotChecked=0, Total=11772 [2022-01-18 06:10:28,135 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 229 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 1429 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:10:28,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 419 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1429 Invalid, 0 Unknown, 205 Unchecked, 0.6s Time] [2022-01-18 06:10:28,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2022-01-18 06:10:28,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1204. [2022-01-18 06:10:28,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 1203 states have (on average 2.0290939318370738) internal successors, (2441), 1203 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:28,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 2441 transitions. [2022-01-18 06:10:28,148 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 2441 transitions. Word has length 33 [2022-01-18 06:10:28,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:10:28,148 INFO L470 AbstractCegarLoop]: Abstraction has 1204 states and 2441 transitions. [2022-01-18 06:10:28,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:28,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 2441 transitions. [2022-01-18 06:10:28,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:10:28,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:10:28,149 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:10:28,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2022-01-18 06:10:28,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:28,350 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:10:28,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:10:28,350 INFO L85 PathProgramCache]: Analyzing trace with hash 2029057878, now seen corresponding path program 176 times [2022-01-18 06:10:28,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:10:28,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78090680] [2022-01-18 06:10:28,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:10:28,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:10:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:10:28,605 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:28,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:10:28,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78090680] [2022-01-18 06:10:28,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78090680] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:10:28,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558658892] [2022-01-18 06:10:28,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:10:28,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:28,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:10:28,607 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:10:28,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-01-18 06:10:28,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:10:28,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:10:28,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:10:28,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:10:28,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:28,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:28,963 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 27 treesize of output 13 [2022-01-18 06:10:29,134 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:29,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:10:29,537 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:10:29,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:10:29,600 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:29,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558658892] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:10:29,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:10:29,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:10:29,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444559849] [2022-01-18 06:10:29,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:10:29,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:10:29,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:10:29,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:10:29,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1534, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:10:29,601 INFO L87 Difference]: Start difference. First operand 1204 states and 2441 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:33,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:10:33,613 INFO L93 Difference]: Finished difference Result 1974 states and 3932 transitions. [2022-01-18 06:10:33,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-18 06:10:33,614 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:10:33,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:10:33,616 INFO L225 Difference]: With dead ends: 1974 [2022-01-18 06:10:33,616 INFO L226 Difference]: Without dead ends: 1835 [2022-01-18 06:10:33,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5706 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1652, Invalid=15378, Unknown=0, NotChecked=0, Total=17030 [2022-01-18 06:10:33,617 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 308 mSDsluCounter, 1134 mSDsCounter, 0 mSdLazyCounter, 2572 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 3529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 2572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 770 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:10:33,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 682 Invalid, 3529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 2572 Invalid, 0 Unknown, 770 Unchecked, 1.1s Time] [2022-01-18 06:10:33,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1835 states. [2022-01-18 06:10:33,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1835 to 1183. [2022-01-18 06:10:33,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 2.029610829103215) internal successors, (2399), 1182 states have internal predecessors, (2399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:33,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 2399 transitions. [2022-01-18 06:10:33,630 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 2399 transitions. Word has length 33 [2022-01-18 06:10:33,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:10:33,630 INFO L470 AbstractCegarLoop]: Abstraction has 1183 states and 2399 transitions. [2022-01-18 06:10:33,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:33,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 2399 transitions. [2022-01-18 06:10:33,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:10:33,631 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:10:33,631 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:10:33,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2022-01-18 06:10:33,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:33,831 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:10:33,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:10:33,831 INFO L85 PathProgramCache]: Analyzing trace with hash -839667052, now seen corresponding path program 177 times [2022-01-18 06:10:33,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:10:33,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436754459] [2022-01-18 06:10:33,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:10:33,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:10:33,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:10:34,099 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:34,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:10:34,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436754459] [2022-01-18 06:10:34,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436754459] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:10:34,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958172403] [2022-01-18 06:10:34,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:10:34,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:34,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:10:34,101 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:10:34,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-01-18 06:10:34,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:10:34,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:10:34,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 06:10:34,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:10:34,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:34,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:34,441 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 27 treesize of output 13 [2022-01-18 06:10:34,642 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:34,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:10:35,174 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:10:35,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 63 [2022-01-18 06:10:35,223 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:35,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958172403] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:10:35,223 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:10:35,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-01-18 06:10:35,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505204183] [2022-01-18 06:10:35,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:10:35,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 06:10:35,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:10:35,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 06:10:35,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1847, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 06:10:35,224 INFO L87 Difference]: Start difference. First operand 1183 states and 2399 transitions. Second operand has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:40,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:10:40,544 INFO L93 Difference]: Finished difference Result 2048 states and 4049 transitions. [2022-01-18 06:10:40,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-18 06:10:40,545 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:10:40,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:10:40,547 INFO L225 Difference]: With dead ends: 2048 [2022-01-18 06:10:40,547 INFO L226 Difference]: Without dead ends: 1950 [2022-01-18 06:10:40,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8031 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2163, Invalid=20789, Unknown=0, NotChecked=0, Total=22952 [2022-01-18 06:10:40,549 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 396 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 3352 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 4080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 3352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 509 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:10:40,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 645 Invalid, 4080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 3352 Invalid, 0 Unknown, 509 Unchecked, 1.3s Time] [2022-01-18 06:10:40,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2022-01-18 06:10:40,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1187. [2022-01-18 06:10:40,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1186 states have (on average 2.026981450252951) internal successors, (2404), 1186 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:40,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 2404 transitions. [2022-01-18 06:10:40,562 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 2404 transitions. Word has length 33 [2022-01-18 06:10:40,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:10:40,562 INFO L470 AbstractCegarLoop]: Abstraction has 1187 states and 2404 transitions. [2022-01-18 06:10:40,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:40,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 2404 transitions. [2022-01-18 06:10:40,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:10:40,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:10:40,564 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:10:40,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2022-01-18 06:10:40,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2022-01-18 06:10:40,780 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:10:40,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:10:40,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1860382340, now seen corresponding path program 178 times [2022-01-18 06:10:40,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:10:40,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49284416] [2022-01-18 06:10:40,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:10:40,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:10:40,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:10:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:41,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:10:41,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49284416] [2022-01-18 06:10:41,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49284416] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:10:41,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84505425] [2022-01-18 06:10:41,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:10:41,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:41,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:10:41,064 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:10:41,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-01-18 06:10:41,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:10:41,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:10:41,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:10:41,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:10:41,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:41,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:41,528 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 27 treesize of output 13 [2022-01-18 06:10:41,680 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:41,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:10:42,132 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:10:42,132 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 42 treesize of output 60 [2022-01-18 06:10:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:42,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84505425] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:10:42,197 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:10:42,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:10:42,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856943461] [2022-01-18 06:10:42,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:10:42,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:10:42,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:10:42,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:10:42,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1546, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:10:42,198 INFO L87 Difference]: Start difference. First operand 1187 states and 2404 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:45,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:10:45,113 INFO L93 Difference]: Finished difference Result 1796 states and 3592 transitions. [2022-01-18 06:10:45,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-18 06:10:45,113 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:10:45,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:10:45,115 INFO L225 Difference]: With dead ends: 1796 [2022-01-18 06:10:45,115 INFO L226 Difference]: Without dead ends: 1672 [2022-01-18 06:10:45,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 42 SyntacticMatches, 13 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3421 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=937, Invalid=9569, Unknown=0, NotChecked=0, Total=10506 [2022-01-18 06:10:45,117 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 220 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 1966 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 2647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 588 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:10:45,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 585 Invalid, 2647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1966 Invalid, 0 Unknown, 588 Unchecked, 0.8s Time] [2022-01-18 06:10:45,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2022-01-18 06:10:45,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1193. [2022-01-18 06:10:45,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1192 states have (on average 2.0268456375838926) internal successors, (2416), 1192 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:45,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 2416 transitions. [2022-01-18 06:10:45,129 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 2416 transitions. Word has length 33 [2022-01-18 06:10:45,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:10:45,129 INFO L470 AbstractCegarLoop]: Abstraction has 1193 states and 2416 transitions. [2022-01-18 06:10:45,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:45,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 2416 transitions. [2022-01-18 06:10:45,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:10:45,130 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:10:45,131 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:10:45,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-01-18 06:10:45,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:45,331 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:10:45,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:10:45,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1219271750, now seen corresponding path program 179 times [2022-01-18 06:10:45,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:10:45,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701959910] [2022-01-18 06:10:45,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:10:45,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:10:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:10:45,608 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:45,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:10:45,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701959910] [2022-01-18 06:10:45,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701959910] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:10:45,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849524575] [2022-01-18 06:10:45,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:10:45,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:45,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:10:45,610 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:10:45,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-01-18 06:10:45,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:10:45,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:10:45,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 06:10:45,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:10:46,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:46,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:46,001 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 27 treesize of output 13 [2022-01-18 06:10:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:46,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:10:46,784 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:10:46,785 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 49 treesize of output 63 [2022-01-18 06:10:46,846 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:46,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849524575] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:10:46,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:10:46,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-01-18 06:10:46,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892165008] [2022-01-18 06:10:46,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:10:46,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 06:10:46,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:10:46,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 06:10:46,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1854, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 06:10:46,847 INFO L87 Difference]: Start difference. First operand 1193 states and 2416 transitions. Second operand has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:50,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:10:50,119 INFO L93 Difference]: Finished difference Result 1777 states and 3563 transitions. [2022-01-18 06:10:50,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-18 06:10:50,119 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:10:50,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:10:50,121 INFO L225 Difference]: With dead ends: 1777 [2022-01-18 06:10:50,121 INFO L226 Difference]: Without dead ends: 1713 [2022-01-18 06:10:50,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4212 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1268, Invalid=12072, Unknown=0, NotChecked=0, Total=13340 [2022-01-18 06:10:50,123 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 247 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 2407 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 2800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 2407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:10:50,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 549 Invalid, 2800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 2407 Invalid, 0 Unknown, 225 Unchecked, 0.9s Time] [2022-01-18 06:10:50,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2022-01-18 06:10:50,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 1198. [2022-01-18 06:10:50,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 2.026733500417711) internal successors, (2426), 1197 states have internal predecessors, (2426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:50,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 2426 transitions. [2022-01-18 06:10:50,135 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 2426 transitions. Word has length 33 [2022-01-18 06:10:50,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:10:50,135 INFO L470 AbstractCegarLoop]: Abstraction has 1198 states and 2426 transitions. [2022-01-18 06:10:50,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:50,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 2426 transitions. [2022-01-18 06:10:50,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:10:50,136 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:10:50,137 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:10:50,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2022-01-18 06:10:50,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:50,337 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:10:50,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:10:50,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1781082480, now seen corresponding path program 180 times [2022-01-18 06:10:50,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:10:50,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266369121] [2022-01-18 06:10:50,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:10:50,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:10:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:10:50,591 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:50,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:10:50,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266369121] [2022-01-18 06:10:50,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266369121] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:10:50,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851393687] [2022-01-18 06:10:50,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:10:50,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:50,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:10:50,599 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:10:50,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-01-18 06:10:50,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:10:50,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:10:50,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 06:10:50,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:10:50,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:50,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:50,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:50,958 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 06:10:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:51,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:10:51,530 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:10:51,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:10:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:51,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851393687] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:10:51,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:10:51,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:10:51,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579167543] [2022-01-18 06:10:51,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:10:51,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:10:51,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:10:51,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:10:51,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1536, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:10:51,584 INFO L87 Difference]: Start difference. First operand 1198 states and 2426 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:54,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:10:54,741 INFO L93 Difference]: Finished difference Result 1769 states and 3565 transitions. [2022-01-18 06:10:54,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-18 06:10:54,742 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:10:54,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:10:54,744 INFO L225 Difference]: With dead ends: 1769 [2022-01-18 06:10:54,744 INFO L226 Difference]: Without dead ends: 1737 [2022-01-18 06:10:54,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3482 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1159, Invalid=10183, Unknown=0, NotChecked=0, Total=11342 [2022-01-18 06:10:54,745 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 217 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 1930 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 2699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 619 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:10:54,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 492 Invalid, 2699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1930 Invalid, 0 Unknown, 619 Unchecked, 0.8s Time] [2022-01-18 06:10:54,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2022-01-18 06:10:54,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1193. [2022-01-18 06:10:54,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1192 states have (on average 2.0268456375838926) internal successors, (2416), 1192 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:54,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 2416 transitions. [2022-01-18 06:10:54,758 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 2416 transitions. Word has length 33 [2022-01-18 06:10:54,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:10:54,758 INFO L470 AbstractCegarLoop]: Abstraction has 1193 states and 2416 transitions. [2022-01-18 06:10:54,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:54,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 2416 transitions. [2022-01-18 06:10:54,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:10:54,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:10:54,759 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:10:54,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2022-01-18 06:10:54,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:54,960 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:10:54,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:10:54,960 INFO L85 PathProgramCache]: Analyzing trace with hash 79243836, now seen corresponding path program 181 times [2022-01-18 06:10:54,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:10:54,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552439963] [2022-01-18 06:10:54,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:10:54,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:10:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:10:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:55,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:10:55,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552439963] [2022-01-18 06:10:55,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552439963] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:10:55,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287047180] [2022-01-18 06:10:55,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:10:55,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:55,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:10:55,246 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:10:55,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-01-18 06:10:55,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:10:55,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:10:55,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:10:55,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:55,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:55,589 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 27 treesize of output 13 [2022-01-18 06:10:55,794 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:55,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:10:56,196 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:10:56,196 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 42 treesize of output 60 [2022-01-18 06:10:56,244 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:56,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287047180] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:10:56,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:10:56,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:10:56,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002274149] [2022-01-18 06:10:56,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:10:56,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:10:56,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:10:56,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:10:56,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:10:56,245 INFO L87 Difference]: Start difference. First operand 1193 states and 2416 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:58,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:10:58,853 INFO L93 Difference]: Finished difference Result 1679 states and 3360 transitions. [2022-01-18 06:10:58,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-18 06:10:58,853 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:10:58,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:10:58,856 INFO L225 Difference]: With dead ends: 1679 [2022-01-18 06:10:58,856 INFO L226 Difference]: Without dead ends: 1615 [2022-01-18 06:10:58,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3169 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1087, Invalid=9419, Unknown=0, NotChecked=0, Total=10506 [2022-01-18 06:10:58,857 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 212 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1889 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 2136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:10:58,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 385 Invalid, 2136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1889 Invalid, 0 Unknown, 120 Unchecked, 0.8s Time] [2022-01-18 06:10:58,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2022-01-18 06:10:58,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1187. [2022-01-18 06:10:58,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1186 states have (on average 2.026981450252951) internal successors, (2404), 1186 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:58,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 2404 transitions. [2022-01-18 06:10:58,869 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 2404 transitions. Word has length 33 [2022-01-18 06:10:58,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:10:58,869 INFO L470 AbstractCegarLoop]: Abstraction has 1187 states and 2404 transitions. [2022-01-18 06:10:58,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:58,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 2404 transitions. [2022-01-18 06:10:58,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:10:58,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:10:58,870 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:10:58,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2022-01-18 06:10:59,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:59,071 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:10:59,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:10:59,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1754299798, now seen corresponding path program 182 times [2022-01-18 06:10:59,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:10:59,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161803257] [2022-01-18 06:10:59,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:10:59,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:10:59,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:10:59,359 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:59,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:10:59,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161803257] [2022-01-18 06:10:59,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161803257] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:10:59,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712168809] [2022-01-18 06:10:59,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:10:59,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:59,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:10:59,360 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:10:59,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-01-18 06:10:59,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:10:59,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:10:59,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 06:10:59,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:10:59,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:59,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:59,710 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 27 treesize of output 13 [2022-01-18 06:10:59,913 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:59,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:11:00,370 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:11:00,371 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 42 treesize of output 60 [2022-01-18 06:11:00,452 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:00,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712168809] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:11:00,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:11:00,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:11:00,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60759874] [2022-01-18 06:11:00,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:11:00,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:11:00,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:11:00,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:11:00,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1543, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:11:00,453 INFO L87 Difference]: Start difference. First operand 1187 states and 2404 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:03,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:11:03,644 INFO L93 Difference]: Finished difference Result 1726 states and 3436 transitions. [2022-01-18 06:11:03,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-18 06:11:03,644 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:11:03,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:11:03,646 INFO L225 Difference]: With dead ends: 1726 [2022-01-18 06:11:03,646 INFO L226 Difference]: Without dead ends: 1621 [2022-01-18 06:11:03,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4143 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1334, Invalid=12472, Unknown=0, NotChecked=0, Total=13806 [2022-01-18 06:11:03,647 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 316 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 2297 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 2524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 2297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:11:03,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 467 Invalid, 2524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 2297 Invalid, 0 Unknown, 68 Unchecked, 0.9s Time] [2022-01-18 06:11:03,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2022-01-18 06:11:03,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1209. [2022-01-18 06:11:03,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1208 states have (on average 2.0264900662251657) internal successors, (2448), 1208 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:03,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 2448 transitions. [2022-01-18 06:11:03,659 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 2448 transitions. Word has length 33 [2022-01-18 06:11:03,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:11:03,659 INFO L470 AbstractCegarLoop]: Abstraction has 1209 states and 2448 transitions. [2022-01-18 06:11:03,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:03,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 2448 transitions. [2022-01-18 06:11:03,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:11:03,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:11:03,660 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:11:03,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2022-01-18 06:11:03,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:11:03,860 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:11:03,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:11:03,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1258121136, now seen corresponding path program 183 times [2022-01-18 06:11:03,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:11:03,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695569738] [2022-01-18 06:11:03,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:11:03,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:11:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:11:04,108 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:04,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:11:04,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695569738] [2022-01-18 06:11:04,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695569738] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:11:04,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597619650] [2022-01-18 06:11:04,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:11:04,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:11:04,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:11:04,110 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:11:04,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-01-18 06:11:04,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:11:04,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:11:04,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:11:04,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:11:04,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:11:04,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:11:04,502 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 27 treesize of output 13 [2022-01-18 06:11:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:04,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:11:05,039 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:11:05,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:11:05,088 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:05,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597619650] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:11:05,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:11:05,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 40 [2022-01-18 06:11:05,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027348978] [2022-01-18 06:11:05,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:11:05,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:11:05,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:11:05,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:11:05,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:11:05,089 INFO L87 Difference]: Start difference. First operand 1209 states and 2448 transitions. Second operand has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:07,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:11:07,563 INFO L93 Difference]: Finished difference Result 1732 states and 3449 transitions. [2022-01-18 06:11:07,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 06:11:07,563 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:11:07,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:11:07,565 INFO L225 Difference]: With dead ends: 1732 [2022-01-18 06:11:07,565 INFO L226 Difference]: Without dead ends: 1612 [2022-01-18 06:11:07,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 43 SyntacticMatches, 14 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2929 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=896, Invalid=8416, Unknown=0, NotChecked=0, Total=9312 [2022-01-18 06:11:07,566 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 273 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 2083 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 2513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 352 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:11:07,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 471 Invalid, 2513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2083 Invalid, 0 Unknown, 352 Unchecked, 0.8s Time] [2022-01-18 06:11:07,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2022-01-18 06:11:07,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1229. [2022-01-18 06:11:07,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 1228 states have (on average 2.02442996742671) internal successors, (2486), 1228 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:07,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 2486 transitions. [2022-01-18 06:11:07,577 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 2486 transitions. Word has length 33 [2022-01-18 06:11:07,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:11:07,577 INFO L470 AbstractCegarLoop]: Abstraction has 1229 states and 2486 transitions. [2022-01-18 06:11:07,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:07,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 2486 transitions. [2022-01-18 06:11:07,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:11:07,578 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:11:07,578 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:11:07,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2022-01-18 06:11:07,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-01-18 06:11:07,779 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:11:07,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:11:07,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1899231726, now seen corresponding path program 184 times [2022-01-18 06:11:07,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:11:07,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369333939] [2022-01-18 06:11:07,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:11:07,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:11:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:11:08,018 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:08,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:11:08,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369333939] [2022-01-18 06:11:08,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369333939] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:11:08,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505618465] [2022-01-18 06:11:08,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:11:08,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:11:08,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:11:08,020 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:11:08,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-01-18 06:11:08,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:11:08,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:11:08,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:11:08,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:11:08,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:11:08,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:11:08,345 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 27 treesize of output 13 [2022-01-18 06:11:08,513 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:08,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:11:08,906 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:11:08,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 06:11:08,955 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:08,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505618465] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:11:08,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:11:08,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 40 [2022-01-18 06:11:08,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188653546] [2022-01-18 06:11:08,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:11:08,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:11:08,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:11:08,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:11:08,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1468, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:11:08,956 INFO L87 Difference]: Start difference. First operand 1229 states and 2486 transitions. Second operand has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:11,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:11:11,520 INFO L93 Difference]: Finished difference Result 1886 states and 3776 transitions. [2022-01-18 06:11:11,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-18 06:11:11,520 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:11:11,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:11:11,522 INFO L225 Difference]: With dead ends: 1886 [2022-01-18 06:11:11,522 INFO L226 Difference]: Without dead ends: 1822 [2022-01-18 06:11:11,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1064, Invalid=9238, Unknown=0, NotChecked=0, Total=10302 [2022-01-18 06:11:11,524 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 264 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 1999 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 2429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 309 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:11:11,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 432 Invalid, 2429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1999 Invalid, 0 Unknown, 309 Unchecked, 0.7s Time] [2022-01-18 06:11:11,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2022-01-18 06:11:11,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1244. [2022-01-18 06:11:11,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1243 states have (on average 2.0265486725663715) internal successors, (2519), 1243 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:11,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 2519 transitions. [2022-01-18 06:11:11,536 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 2519 transitions. Word has length 33 [2022-01-18 06:11:11,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:11:11,536 INFO L470 AbstractCegarLoop]: Abstraction has 1244 states and 2519 transitions. [2022-01-18 06:11:11,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:11,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 2519 transitions. [2022-01-18 06:11:11,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:11:11,537 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:11:11,537 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:11:11,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-01-18 06:11:11,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-01-18 06:11:11,737 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:11:11,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:11:11,738 INFO L85 PathProgramCache]: Analyzing trace with hash -472989360, now seen corresponding path program 185 times [2022-01-18 06:11:11,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:11:11,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265241793] [2022-01-18 06:11:11,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:11:11,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:11:11,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:11:11,989 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:11,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:11:11,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265241793] [2022-01-18 06:11:11,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265241793] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:11:11,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974282691] [2022-01-18 06:11:11,989 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:11:11,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:11:11,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:11:11,990 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:11:11,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-01-18 06:11:12,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:11:12,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:11:12,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 06:11:12,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:11:12,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:11:12,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:11:12,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 06:11:12,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:12,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:11:13,061 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:11:13,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 63 [2022-01-18 06:11:13,122 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:13,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974282691] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:11:13,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:11:13,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 44 [2022-01-18 06:11:13,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955873955] [2022-01-18 06:11:13,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:11:13,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 06:11:13,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:11:13,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 06:11:13,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1771, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 06:11:13,123 INFO L87 Difference]: Start difference. First operand 1244 states and 2519 transitions. Second operand has 45 states, 45 states have (on average 1.8) internal successors, (81), 44 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:18,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:11:18,193 INFO L93 Difference]: Finished difference Result 2122 states and 4200 transitions. [2022-01-18 06:11:18,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-18 06:11:18,193 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.8) internal successors, (81), 44 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:11:18,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:11:18,195 INFO L225 Difference]: With dead ends: 2122 [2022-01-18 06:11:18,195 INFO L226 Difference]: Without dead ends: 1989 [2022-01-18 06:11:18,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 34 SyntacticMatches, 9 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7265 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2152, Invalid=19604, Unknown=0, NotChecked=0, Total=21756 [2022-01-18 06:11:18,196 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 468 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 3106 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 3718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 3106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 397 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:11:18,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 610 Invalid, 3718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 3106 Invalid, 0 Unknown, 397 Unchecked, 1.2s Time] [2022-01-18 06:11:18,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1989 states. [2022-01-18 06:11:18,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1989 to 1238. [2022-01-18 06:11:18,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 2.0234438156831045) internal successors, (2503), 1237 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:18,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 2503 transitions. [2022-01-18 06:11:18,208 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 2503 transitions. Word has length 33 [2022-01-18 06:11:18,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:11:18,208 INFO L470 AbstractCegarLoop]: Abstraction has 1238 states and 2503 transitions. [2022-01-18 06:11:18,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.8) internal successors, (81), 44 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:18,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 2503 transitions. [2022-01-18 06:11:18,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:11:18,209 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:11:18,209 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:11:18,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2022-01-18 06:11:18,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2022-01-18 06:11:18,410 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:11:18,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:11:18,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1301364348, now seen corresponding path program 186 times [2022-01-18 06:11:18,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:11:18,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636062730] [2022-01-18 06:11:18,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:11:18,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:11:18,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:11:18,686 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:18,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:11:18,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636062730] [2022-01-18 06:11:18,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636062730] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:11:18,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924996461] [2022-01-18 06:11:18,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:11:18,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:11:18,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:11:18,688 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:11:18,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-01-18 06:11:18,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:11:18,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:11:18,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:11:18,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:11:19,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:11:19,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:11:19,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:11:19,170 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 06:11:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:19,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:11:19,776 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:11:19,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 63 [2022-01-18 06:11:19,824 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:19,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924996461] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:11:19,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:11:19,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 44 [2022-01-18 06:11:19,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566371340] [2022-01-18 06:11:19,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:11:19,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 06:11:19,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:11:19,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 06:11:19,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1760, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 06:11:19,825 INFO L87 Difference]: Start difference. First operand 1238 states and 2503 transitions. Second operand has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:22,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:11:22,344 INFO L93 Difference]: Finished difference Result 2004 states and 3972 transitions. [2022-01-18 06:11:22,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 06:11:22,344 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:11:22,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:11:22,347 INFO L225 Difference]: With dead ends: 2004 [2022-01-18 06:11:22,347 INFO L226 Difference]: Without dead ends: 1896 [2022-01-18 06:11:22,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3425 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=946, Invalid=9560, Unknown=0, NotChecked=0, Total=10506 [2022-01-18 06:11:22,348 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 301 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 2133 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 2630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 389 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:11:22,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 406 Invalid, 2630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2133 Invalid, 0 Unknown, 389 Unchecked, 0.8s Time] [2022-01-18 06:11:22,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2022-01-18 06:11:22,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1286. [2022-01-18 06:11:22,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 1285 states have (on average 2.0155642023346303) internal successors, (2590), 1285 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:22,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 2590 transitions. [2022-01-18 06:11:22,361 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 2590 transitions. Word has length 33 [2022-01-18 06:11:22,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:11:22,361 INFO L470 AbstractCegarLoop]: Abstraction has 1286 states and 2590 transitions. [2022-01-18 06:11:22,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:22,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 2590 transitions. [2022-01-18 06:11:22,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:11:22,362 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:11:22,362 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:11:22,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2022-01-18 06:11:22,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:11:22,563 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:11:22,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:11:22,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1044174664, now seen corresponding path program 187 times [2022-01-18 06:11:22,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:11:22,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497800058] [2022-01-18 06:11:22,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:11:22,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:11:22,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:11:22,810 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:22,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:11:22,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497800058] [2022-01-18 06:11:22,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497800058] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:11:22,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712393353] [2022-01-18 06:11:22,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:11:22,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:11:22,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:11:22,811 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:11:22,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-01-18 06:11:22,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:11:22,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:11:22,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:11:23,159 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 06:11:23,159 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 29 treesize of output 13 [2022-01-18 06:11:23,301 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:23,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:11:23,673 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:11:23,673 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 44 treesize of output 62 [2022-01-18 06:11:23,738 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:23,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712393353] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:11:23,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:11:23,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:11:23,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85431475] [2022-01-18 06:11:23,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:11:23,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:11:23,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:11:23,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:11:23,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1560, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:11:23,740 INFO L87 Difference]: Start difference. First operand 1286 states and 2590 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:25,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:11:25,093 INFO L93 Difference]: Finished difference Result 1760 states and 3517 transitions. [2022-01-18 06:11:25,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 06:11:25,093 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:11:25,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:11:25,095 INFO L225 Difference]: With dead ends: 1760 [2022-01-18 06:11:25,095 INFO L226 Difference]: Without dead ends: 1712 [2022-01-18 06:11:25,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=455, Invalid=5095, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 06:11:25,096 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 204 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 1532 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:11:25,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 430 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1532 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 06:11:25,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2022-01-18 06:11:25,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1292. [2022-01-18 06:11:25,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 2.017815646785438) internal successors, (2605), 1291 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:25,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 2605 transitions. [2022-01-18 06:11:25,109 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 2605 transitions. Word has length 33 [2022-01-18 06:11:25,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:11:25,109 INFO L470 AbstractCegarLoop]: Abstraction has 1292 states and 2605 transitions. [2022-01-18 06:11:25,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:25,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 2605 transitions. [2022-01-18 06:11:25,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:11:25,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:11:25,110 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:11:25,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2022-01-18 06:11:25,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:11:25,310 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:11:25,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:11:25,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1971420918, now seen corresponding path program 188 times [2022-01-18 06:11:25,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:11:25,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484432563] [2022-01-18 06:11:25,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:11:25,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:11:25,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:11:25,572 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:25,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:11:25,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484432563] [2022-01-18 06:11:25,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484432563] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:11:25,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904571930] [2022-01-18 06:11:25,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:11:25,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:11:25,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:11:25,574 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:11:25,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-01-18 06:11:25,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:11:25,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:11:25,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:11:25,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:11:25,948 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 06:11:25,948 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 29 treesize of output 13 [2022-01-18 06:11:26,095 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:26,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:11:26,467 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:11:26,467 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 44 treesize of output 62 [2022-01-18 06:11:26,523 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:26,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904571930] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:11:26,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:11:26,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:11:26,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433426545] [2022-01-18 06:11:26,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:11:26,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:11:26,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:11:26,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:11:26,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1560, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:11:26,524 INFO L87 Difference]: Start difference. First operand 1292 states and 2605 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:28,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:11:28,366 INFO L93 Difference]: Finished difference Result 1826 states and 3642 transitions. [2022-01-18 06:11:28,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 06:11:28,366 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:11:28,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:11:28,368 INFO L225 Difference]: With dead ends: 1826 [2022-01-18 06:11:28,368 INFO L226 Difference]: Without dead ends: 1778 [2022-01-18 06:11:28,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1935 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=577, Invalid=6229, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 06:11:28,369 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 191 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 2179 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 2244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:11:28,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 560 Invalid, 2244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2179 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 06:11:28,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2022-01-18 06:11:28,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1293. [2022-01-18 06:11:28,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 2.0178018575851393) internal successors, (2607), 1292 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:28,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 2607 transitions. [2022-01-18 06:11:28,381 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 2607 transitions. Word has length 33 [2022-01-18 06:11:28,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:11:28,381 INFO L470 AbstractCegarLoop]: Abstraction has 1293 states and 2607 transitions. [2022-01-18 06:11:28,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:28,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 2607 transitions. [2022-01-18 06:11:28,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:11:28,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:11:28,382 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:11:28,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2022-01-18 06:11:28,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:11:28,583 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:11:28,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:11:28,583 INFO L85 PathProgramCache]: Analyzing trace with hash -585798328, now seen corresponding path program 189 times [2022-01-18 06:11:28,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:11:28,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671699000] [2022-01-18 06:11:28,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:11:28,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:11:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:11:28,833 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:28,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:11:28,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671699000] [2022-01-18 06:11:28,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671699000] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:11:28,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718004309] [2022-01-18 06:11:28,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:11:28,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:11:28,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:11:28,834 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:11:28,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-01-18 06:11:28,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:11:28,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:11:28,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 06:11:28,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:11:29,211 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:11:29,211 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 06:11:29,369 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:29,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:11:29,781 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:11:29,781 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 44 treesize of output 62 [2022-01-18 06:11:29,849 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:29,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718004309] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:11:29,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:11:29,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:11:29,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037633857] [2022-01-18 06:11:29,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:11:29,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:11:29,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:11:29,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:11:29,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1557, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:11:29,850 INFO L87 Difference]: Start difference. First operand 1293 states and 2607 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:32,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:11:32,340 INFO L93 Difference]: Finished difference Result 2066 states and 4115 transitions. [2022-01-18 06:11:32,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 06:11:32,340 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:11:32,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:11:32,343 INFO L225 Difference]: With dead ends: 2066 [2022-01-18 06:11:32,343 INFO L226 Difference]: Without dead ends: 2018 [2022-01-18 06:11:32,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2419 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=768, Invalid=7604, Unknown=0, NotChecked=0, Total=8372 [2022-01-18 06:11:32,344 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 244 mSDsluCounter, 1173 mSDsCounter, 0 mSdLazyCounter, 2623 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 2720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 2623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:11:32,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 805 Invalid, 2720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 2623 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 06:11:32,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2022-01-18 06:11:32,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1294. [2022-01-18 06:11:32,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1293 states have (on average 2.017788089713844) internal successors, (2609), 1293 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:32,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 2609 transitions. [2022-01-18 06:11:32,359 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 2609 transitions. Word has length 33 [2022-01-18 06:11:32,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:11:32,359 INFO L470 AbstractCegarLoop]: Abstraction has 1294 states and 2609 transitions. [2022-01-18 06:11:32,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:32,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 2609 transitions. [2022-01-18 06:11:32,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:11:32,360 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:11:32,360 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:11:32,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-01-18 06:11:32,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2022-01-18 06:11:32,561 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:11:32,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:11:32,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1226908918, now seen corresponding path program 190 times [2022-01-18 06:11:32,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:11:32,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420539051] [2022-01-18 06:11:32,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:11:32,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:11:32,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:11:32,846 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:32,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:11:32,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420539051] [2022-01-18 06:11:32,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420539051] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:11:32,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481362783] [2022-01-18 06:11:32,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:11:32,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:11:32,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:11:32,848 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:11:32,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-01-18 06:11:32,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:11:32,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:11:32,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:11:32,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:11:33,197 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:11:33,198 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 06:11:33,416 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:33,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:11:33,845 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:11:33,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-01-18 06:11:33,916 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:33,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481362783] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:11:33,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:11:33,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:11:33,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392914768] [2022-01-18 06:11:33,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:11:33,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:11:33,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:11:33,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:11:33,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:11:33,917 INFO L87 Difference]: Start difference. First operand 1294 states and 2609 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:36,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:11:36,751 INFO L93 Difference]: Finished difference Result 1996 states and 3980 transitions. [2022-01-18 06:11:36,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-18 06:11:36,751 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:11:36,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:11:36,753 INFO L225 Difference]: With dead ends: 1996 [2022-01-18 06:11:36,753 INFO L226 Difference]: Without dead ends: 1964 [2022-01-18 06:11:36,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2713 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=892, Invalid=8228, Unknown=0, NotChecked=0, Total=9120 [2022-01-18 06:11:36,754 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 245 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 2293 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 2401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:11:36,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 626 Invalid, 2401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2293 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 06:11:36,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2022-01-18 06:11:36,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1294. [2022-01-18 06:11:36,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1293 states have (on average 2.017788089713844) internal successors, (2609), 1293 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:36,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 2609 transitions. [2022-01-18 06:11:36,767 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 2609 transitions. Word has length 33 [2022-01-18 06:11:36,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:11:36,768 INFO L470 AbstractCegarLoop]: Abstraction has 1294 states and 2609 transitions. [2022-01-18 06:11:36,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:36,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 2609 transitions. [2022-01-18 06:11:36,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:11:36,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:11:36,769 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:11:36,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2022-01-18 06:11:36,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:11:36,969 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:11:36,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:11:36,970 INFO L85 PathProgramCache]: Analyzing trace with hash 199333448, now seen corresponding path program 191 times [2022-01-18 06:11:36,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:11:36,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588533637] [2022-01-18 06:11:36,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:11:36,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:11:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:11:37,242 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:37,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:11:37,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588533637] [2022-01-18 06:11:37,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588533637] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:11:37,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992865538] [2022-01-18 06:11:37,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:11:37,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:11:37,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:11:37,243 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:11:37,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-01-18 06:11:37,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:11:37,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:11:37,267 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 06:11:37,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:11:37,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:11:37,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:11:37,629 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 27 treesize of output 13 [2022-01-18 06:11:37,870 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:37,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:11:38,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:11:38,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:11:38,507 INFO L353 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2022-01-18 06:11:38,507 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 49 treesize of output 57 [2022-01-18 06:11:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:38,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992865538] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:11:38,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:11:38,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 48 [2022-01-18 06:11:38,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297498494] [2022-01-18 06:11:38,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:11:38,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-18 06:11:38,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:11:38,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-18 06:11:38,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=2072, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 06:11:38,656 INFO L87 Difference]: Start difference. First operand 1294 states and 2609 transitions. Second operand has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:45,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:11:45,742 INFO L93 Difference]: Finished difference Result 2365 states and 4672 transitions. [2022-01-18 06:11:45,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-18 06:11:45,742 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:11:45,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:11:45,745 INFO L225 Difference]: With dead ends: 2365 [2022-01-18 06:11:45,745 INFO L226 Difference]: Without dead ends: 2222 [2022-01-18 06:11:45,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9432 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=2867, Invalid=24855, Unknown=0, NotChecked=0, Total=27722 [2022-01-18 06:11:45,747 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 494 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 3095 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 4252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 3095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 922 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:11:45,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 742 Invalid, 4252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 3095 Invalid, 0 Unknown, 922 Unchecked, 1.4s Time] [2022-01-18 06:11:45,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2022-01-18 06:11:45,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 1308. [2022-01-18 06:11:45,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1308 states, 1307 states have (on average 2.0153022188217293) internal successors, (2634), 1307 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:45,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 2634 transitions. [2022-01-18 06:11:45,767 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 2634 transitions. Word has length 33 [2022-01-18 06:11:45,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:11:45,767 INFO L470 AbstractCegarLoop]: Abstraction has 1308 states and 2634 transitions. [2022-01-18 06:11:45,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:45,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 2634 transitions. [2022-01-18 06:11:45,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:11:45,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:11:45,769 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:11:45,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2022-01-18 06:11:45,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:11:45,969 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:11:45,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:11:45,969 INFO L85 PathProgramCache]: Analyzing trace with hash 476250482, now seen corresponding path program 192 times [2022-01-18 06:11:45,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:11:45,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777571295] [2022-01-18 06:11:45,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:11:45,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:11:45,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:11:46,239 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:46,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:11:46,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777571295] [2022-01-18 06:11:46,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777571295] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:11:46,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696206348] [2022-01-18 06:11:46,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:11:46,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:11:46,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:11:46,241 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:11:46,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-01-18 06:11:46,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:11:46,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:11:46,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 06:11:46,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:11:46,558 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:11:46,558 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 06:11:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:46,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:11:47,163 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:11:47,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-01-18 06:11:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:47,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696206348] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:11:47,228 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:11:47,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 06:11:47,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904966354] [2022-01-18 06:11:47,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:11:47,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:11:47,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:11:47,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:11:47,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:11:47,229 INFO L87 Difference]: Start difference. First operand 1308 states and 2634 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-01-18 06:11:47,382 WARN L244 SmtUtils]: Removed 5 from assertion stack [2022-01-18 06:11:47,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 06:11:47,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 06:11:47,383 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:11:47,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 8 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:11:47,384 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-01-18 06:11:47,393 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 06:11:47,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2022-01-18 06:11:47,429 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 06:11:47,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:11:47,584 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (1308states) and FLOYD_HOARE automaton (currently 5 states, 42 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 28 for 20ms.. [2022-01-18 06:11:47,586 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-18 06:11:47,586 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-18 06:11:47,588 INFO L732 BasicCegarLoop]: Path program histogram: [192, 5, 1] [2022-01-18 06:11:47,589 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 06:11:47,589 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 06:11:47,591 INFO L202 PluginConnector]: Adding new model queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 06:11:47 BasicIcfg [2022-01-18 06:11:47,591 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 06:11:47,591 INFO L158 Benchmark]: Toolchain (without parser) took 751219.08ms. Allocated memory was 341.8MB in the beginning and 553.6MB in the end (delta: 211.8MB). Free memory was 300.4MB in the beginning and 409.2MB in the end (delta: -108.8MB). Peak memory consumption was 104.5MB. Max. memory is 16.0GB. [2022-01-18 06:11:47,591 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.09ms. Allocated memory is still 341.8MB. Free memory is still 301.5MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 06:11:47,591 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.28ms. Allocated memory is still 341.8MB. Free memory was 300.4MB in the beginning and 298.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 06:11:47,591 INFO L158 Benchmark]: Boogie Preprocessor took 13.28ms. Allocated memory is still 341.8MB. Free memory was 298.8MB in the beginning and 297.9MB in the end (delta: 975.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 06:11:47,591 INFO L158 Benchmark]: RCFGBuilder took 233.16ms. Allocated memory is still 341.8MB. Free memory was 297.8MB in the beginning and 288.7MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2022-01-18 06:11:47,591 INFO L158 Benchmark]: TraceAbstraction took 750943.77ms. Allocated memory was 341.8MB in the beginning and 553.6MB in the end (delta: 211.8MB). Free memory was 288.2MB in the beginning and 409.2MB in the end (delta: -121.1MB). Peak memory consumption was 91.9MB. Max. memory is 16.0GB. [2022-01-18 06:11:47,591 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 0.09ms. Allocated memory is still 341.8MB. Free memory is still 301.5MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 18.28ms. Allocated memory is still 341.8MB. Free memory was 300.4MB in the beginning and 298.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 13.28ms. Allocated memory is still 341.8MB. Free memory was 298.8MB in the beginning and 297.9MB in the end (delta: 975.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 233.16ms. Allocated memory is still 341.8MB. Free memory was 297.8MB in the beginning and 288.7MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * TraceAbstraction took 750943.77ms. Allocated memory was 341.8MB in the beginning and 553.6MB in the end (delta: 211.8MB). Free memory was 288.2MB in the beginning and 409.2MB in the end (delta: -121.1MB). Peak memory consumption was 91.9MB. 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: 60]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1308states) and FLOYD_HOARE automaton (currently 5 states, 42 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 28 for 20ms.. - TimeoutResultAtElement [Line: 55]: 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 (1308states) and FLOYD_HOARE automaton (currently 5 states, 42 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 28 for 20ms.. - TimeoutResultAtElement [Line: 55]: 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 (1308states) and FLOYD_HOARE automaton (currently 5 states, 42 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 28 for 20ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 42 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 750.9s, OverallIterations: 198, TraceHistogramMax: 3, PathProgramHistogramMax: 192, EmptinessCheckTime: 0.2s, AutomataDifference: 463.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 44850 SdHoareTripleChecker+Valid, 133.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 44850 mSDsluCounter, 100006 SdHoareTripleChecker+Invalid, 113.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 63358 IncrementalHoareTripleChecker+Unchecked, 157178 mSDsCounter, 18817 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 341677 IncrementalHoareTripleChecker+Invalid, 423852 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18817 mSolverCounterUnsat, 6858 mSDtfsCounter, 341677 mSolverCounterSat, 0.9s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 26496 GetRequests, 7326 SyntacticMatches, 1743 SemanticMatches, 17426 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547676 ImplicationChecksByTransitivity, 450.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1308occurred in iteration=197, InterpolantAutomatonStates: 12790, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.6s AutomataMinimizationTime, 197 MinimizatonAttempts, 77774 StatesRemovedByMinimization, 195 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 239.5s InterpolantComputationTime, 12592 NumberOfCodeBlocks, 12592 NumberOfCodeBlocksAsserted, 621 NumberOfCheckSat, 18259 ConstructedInterpolants, 1375 QuantifiedInterpolants, 300049 SizeOfPredicates, 2263 NumberOfNonLiveVariables, 13876 ConjunctsInSsa, 6272 ConjunctsInUnsatCore, 589 InterpolantComputations, 3 PerfectInterpolantSequences, 57/10786 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