/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 21:30:49,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 21:30:49,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 21:30:50,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-15 21:30:50,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-15 21:30:50,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-15 21:30:50,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-15 21:30:50,014 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-15 21:30:50,015 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-15 21:30:50,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-15 21:30:50,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-15 21:30:50,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-15 21:30:50,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-15 21:30:50,021 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-15 21:30:50,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-15 21:30:50,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-15 21:30:50,025 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-15 21:30:50,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-15 21:30:50,027 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-15 21:30:50,030 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-15 21:30:50,031 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-15 21:30:50,032 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-15 21:30:50,033 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-15 21:30:50,034 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-15 21:30:50,038 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-15 21:30:50,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 21:30:50,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 21:30:50,045 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 21:30:50,046 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2022-03-15 21:30:50,067 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 21:30:50,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 21:30:50,068 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 21:30:50,068 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 21:30:50,068 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 21:30:50,068 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 21:30:50,068 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 21:30:50,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 21:30:50,069 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 21:30:50,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 21:30:50,069 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 21:30:50,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 21:30:50,069 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 21:30:50,069 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 21:30:50,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 21:30:50,070 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 21:30:50,070 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 21:30:50,070 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 21:30:50,070 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 21:30:50,070 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 21:30:50,070 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 21:30:50,070 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 21:30:50,070 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 21:30:50,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 21:30:50,070 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 21:30:50,070 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-15 21:30:50,071 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 21:30:50,071 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 21:30:50,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 21:30:50,072 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2022-03-15 21:30:50,072 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2022-03-15 21:30:50,072 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 21:30:50,072 INFO L138 SettingsManager]: * Interpolant automaton=MCR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 21:30:50,239 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 21:30:50,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 21:30:50,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 21:30:50,255 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 21:30:50,256 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 21:30:50,257 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc.wvr.bpl [2022-03-15 21:30:50,257 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc.wvr.bpl' [2022-03-15 21:30:50,278 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 21:30:50,279 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 21:30:50,279 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 21:30:50,279 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 21:30:50,279 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 21:30:50,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:30:50" (1/1) ... [2022-03-15 21:30:50,292 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:30:50" (1/1) ... [2022-03-15 21:30:50,297 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 21:30:50,298 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 21:30:50,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 21:30:50,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 21:30:50,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 21:30:50,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:30:50" (1/1) ... [2022-03-15 21:30:50,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:30:50" (1/1) ... [2022-03-15 21:30:50,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:30:50" (1/1) ... [2022-03-15 21:30:50,306 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:30:50" (1/1) ... [2022-03-15 21:30:50,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:30:50" (1/1) ... [2022-03-15 21:30:50,310 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:30:50" (1/1) ... [2022-03-15 21:30:50,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:30:50" (1/1) ... [2022-03-15 21:30:50,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 21:30:50,317 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 21:30:50,317 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 21:30:50,317 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 21:30:50,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:30:50" (1/1) ... [2022-03-15 21:30:50,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 21:30:50,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:50,340 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-15 21:30:50,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-15 21:30:50,368 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 21:30:50,368 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 21:30:50,368 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 21:30:50,369 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 21:30:50,369 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 21:30:50,369 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 21:30:50,369 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 21:30:50,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 21:30:50,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 21:30:50,369 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-15 21:30:50,369 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-15 21:30:50,369 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-15 21:30:50,369 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-03-15 21:30:50,370 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-03-15 21:30:50,370 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-03-15 21:30:50,371 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 21:30:50,411 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 21:30:50,412 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 21:30:50,484 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 21:30:50,494 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 21:30:50,494 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 21:30:50,495 INFO L202 PluginConnector]: Adding new model min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 09:30:50 BoogieIcfgContainer [2022-03-15 21:30:50,496 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 21:30:50,497 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 21:30:50,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 21:30:50,499 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 21:30:50,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:30:50" (1/2) ... [2022-03-15 21:30:50,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bce02c and model type min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 09:30:50, skipping insertion in model container [2022-03-15 21:30:50,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 09:30:50" (2/2) ... [2022-03-15 21:30:50,500 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-inc.wvr.bpl [2022-03-15 21:30:50,503 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 21:30:50,503 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-15 21:30:50,503 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 21:30:50,503 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 21:30:50,545 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-03-15 21:30:50,597 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 21:30:50,604 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=MCR, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=true, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 21:30:50,604 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-03-15 21:30:50,611 INFO L126 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-03-15 21:30:50,621 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 45 places, 35 transitions, 102 flow [2022-03-15 21:30:50,623 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 45 places, 35 transitions, 102 flow [2022-03-15 21:30:50,624 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 45 places, 35 transitions, 102 flow [2022-03-15 21:30:50,641 INFO L129 PetriNetUnfolder]: 3/31 cut-off events. [2022-03-15 21:30:50,641 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-03-15 21:30:50,644 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 31 events. 3/31 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 59 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2022-03-15 21:30:50,645 INFO L116 LiptonReduction]: Number of co-enabled transitions 340 [2022-03-15 21:30:50,877 INFO L131 LiptonReduction]: Checked pairs total: 413 [2022-03-15 21:30:50,877 INFO L133 LiptonReduction]: Total number of compositions: 10 [2022-03-15 21:30:50,898 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 26 transitions, 84 flow [2022-03-15 21:30:50,936 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 142 states, 141 states have (on average 3.4113475177304964) internal successors, (481), 141 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:50,938 INFO L276 IsEmpty]: Start isEmpty. Operand has 142 states, 141 states have (on average 3.4113475177304964) internal successors, (481), 141 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:50,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:30:50,951 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:50,952 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:50,952 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 21:30:50,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:50,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1224725199, now seen corresponding path program 1 times [2022-03-15 21:30:50,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:50,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044685917] [2022-03-15 21:30:50,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:50,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:51,113 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:51,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044685917] [2022-03-15 21:30:51,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044685917] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:30:51,114 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:30:51,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 21:30:51,115 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [535842809] [2022-03-15 21:30:51,116 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:51,121 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:51,182 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 84 transitions. [2022-03-15 21:30:51,183 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:51,522 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:30:51,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 21:30:51,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:51,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 21:30:51,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 21:30:51,544 INFO L87 Difference]: Start difference. First operand has 142 states, 141 states have (on average 3.4113475177304964) internal successors, (481), 141 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:51,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:51,603 INFO L93 Difference]: Finished difference Result 170 states and 559 transitions. [2022-03-15 21:30:51,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 21:30:51,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 21:30:51,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:51,613 INFO L225 Difference]: With dead ends: 170 [2022-03-15 21:30:51,613 INFO L226 Difference]: Without dead ends: 126 [2022-03-15 21:30:51,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 21:30:51,616 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:51,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 17 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:30:51,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-03-15 21:30:51,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-03-15 21:30:51,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 3.336) internal successors, (417), 125 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:51,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 417 transitions. [2022-03-15 21:30:51,647 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 417 transitions. Word has length 18 [2022-03-15 21:30:51,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:51,647 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 417 transitions. [2022-03-15 21:30:51,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:51,648 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 417 transitions. [2022-03-15 21:30:51,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:30:51,649 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:51,649 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:51,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 21:30:51,649 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 21:30:51,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:51,650 INFO L85 PathProgramCache]: Analyzing trace with hash -2079428537, now seen corresponding path program 2 times [2022-03-15 21:30:51,650 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:51,651 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098209637] [2022-03-15 21:30:51,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:51,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:51,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:51,684 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:51,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098209637] [2022-03-15 21:30:51,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098209637] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:30:51,684 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:30:51,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 21:30:51,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [879335345] [2022-03-15 21:30:51,685 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:51,686 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:51,694 INFO L252 McrAutomatonBuilder]: Finished intersection with 114 states and 272 transitions. [2022-03-15 21:30:51,694 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:52,478 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [766#(<= min (+ (select A 0) 1)), 765#(<= min (+ max 1)), 767#(= (select A 0) min)] [2022-03-15 21:30:52,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 21:30:52,480 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:52,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 21:30:52,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-03-15 21:30:52,480 INFO L87 Difference]: Start difference. First operand 126 states and 417 transitions. Second operand has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:52,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:52,750 INFO L93 Difference]: Finished difference Result 682 states and 2221 transitions. [2022-03-15 21:30:52,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 21:30:52,751 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 21:30:52,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:52,753 INFO L225 Difference]: With dead ends: 682 [2022-03-15 21:30:52,754 INFO L226 Difference]: Without dead ends: 340 [2022-03-15 21:30:52,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 61 SyntacticMatches, 42 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-03-15 21:30:52,755 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 146 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:52,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 39 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:30:52,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-03-15 21:30:52,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 135. [2022-03-15 21:30:52,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 3.126865671641791) internal successors, (419), 134 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:52,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 419 transitions. [2022-03-15 21:30:52,768 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 419 transitions. Word has length 18 [2022-03-15 21:30:52,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:52,768 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 419 transitions. [2022-03-15 21:30:52,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:52,769 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 419 transitions. [2022-03-15 21:30:52,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:30:52,769 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:52,770 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:52,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 21:30:52,770 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 21:30:52,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:52,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1783214531, now seen corresponding path program 3 times [2022-03-15 21:30:52,773 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:52,773 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066653011] [2022-03-15 21:30:52,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:52,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:52,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:52,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:52,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:52,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066653011] [2022-03-15 21:30:52,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066653011] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:30:52,794 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:30:52,794 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 21:30:52,794 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [695945642] [2022-03-15 21:30:52,794 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:52,795 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:52,799 INFO L252 McrAutomatonBuilder]: Finished intersection with 57 states and 105 transitions. [2022-03-15 21:30:52,799 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:53,008 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:30:53,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 21:30:53,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:53,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 21:30:53,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 21:30:53,011 INFO L87 Difference]: Start difference. First operand 135 states and 419 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:53,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:53,048 INFO L93 Difference]: Finished difference Result 151 states and 461 transitions. [2022-03-15 21:30:53,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 21:30:53,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 21:30:53,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:53,050 INFO L225 Difference]: With dead ends: 151 [2022-03-15 21:30:53,050 INFO L226 Difference]: Without dead ends: 103 [2022-03-15 21:30:53,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 21:30:53,052 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:53,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 13 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:30:53,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-15 21:30:53,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-15 21:30:53,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 3.127450980392157) internal successors, (319), 102 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:53,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 319 transitions. [2022-03-15 21:30:53,063 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 319 transitions. Word has length 18 [2022-03-15 21:30:53,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:53,063 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 319 transitions. [2022-03-15 21:30:53,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:53,063 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 319 transitions. [2022-03-15 21:30:53,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:30:53,064 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:53,064 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:53,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-15 21:30:53,064 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 21:30:53,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:53,065 INFO L85 PathProgramCache]: Analyzing trace with hash 420278864, now seen corresponding path program 1 times [2022-03-15 21:30:53,066 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:53,066 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532315846] [2022-03-15 21:30:53,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:53,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:53,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:53,159 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:53,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532315846] [2022-03-15 21:30:53,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532315846] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:53,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762436851] [2022-03-15 21:30:53,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:53,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:53,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:53,165 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:30:53,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 21:30:53,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:53,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 21:30:53,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:53,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-15 21:30:53,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762436851] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:30:53,268 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-15 21:30:53,268 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2022-03-15 21:30:53,268 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [687804687] [2022-03-15 21:30:53,268 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:53,269 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:53,277 INFO L252 McrAutomatonBuilder]: Finished intersection with 89 states and 200 transitions. [2022-03-15 21:30:53,277 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:53,703 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [2176#(< k N), 2177#(or (< k N) (< j N)), 2178#(<= N k), 2179#(or (<= N k) (< j N))] [2022-03-15 21:30:53,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 21:30:53,703 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:53,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 21:30:53,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-03-15 21:30:53,704 INFO L87 Difference]: Start difference. First operand 103 states and 319 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:53,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:53,808 INFO L93 Difference]: Finished difference Result 169 states and 503 transitions. [2022-03-15 21:30:53,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 21:30:53,808 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 21:30:53,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:53,809 INFO L225 Difference]: With dead ends: 169 [2022-03-15 21:30:53,809 INFO L226 Difference]: Without dead ends: 166 [2022-03-15 21:30:53,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-15 21:30:53,810 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 48 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:53,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 53 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:53,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-03-15 21:30:53,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 124. [2022-03-15 21:30:53,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 3.2357723577235773) internal successors, (398), 123 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:53,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 398 transitions. [2022-03-15 21:30:53,816 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 398 transitions. Word has length 19 [2022-03-15 21:30:53,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:53,816 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 398 transitions. [2022-03-15 21:30:53,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:53,816 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 398 transitions. [2022-03-15 21:30:53,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:30:53,817 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:53,817 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:53,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-15 21:30:54,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:54,029 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 21:30:54,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:54,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1841760, now seen corresponding path program 1 times [2022-03-15 21:30:54,031 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:54,031 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812571542] [2022-03-15 21:30:54,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:54,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:54,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:54,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:54,059 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:54,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812571542] [2022-03-15 21:30:54,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812571542] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:54,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369880849] [2022-03-15 21:30:54,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:54,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:54,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:54,066 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:30:54,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 21:30:54,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:54,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 21:30:54,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:54,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:54,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:54,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369880849] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:54,158 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:54,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2022-03-15 21:30:54,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [85708154] [2022-03-15 21:30:54,158 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:54,159 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:54,171 INFO L252 McrAutomatonBuilder]: Finished intersection with 136 states and 332 transitions. [2022-03-15 21:30:54,171 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:55,204 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [2719#(or (<= N j) (<= (+ k 1) N) (< (+ j 1) N)), 2717#(or (<= N j) (< (+ j 1) N)), 2718#(or (<= (+ k 1) N) (< j N)), 2716#(< j N)] [2022-03-15 21:30:55,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 21:30:55,204 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:55,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 21:30:55,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-15 21:30:55,205 INFO L87 Difference]: Start difference. First operand 124 states and 398 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:55,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:55,320 INFO L93 Difference]: Finished difference Result 204 states and 620 transitions. [2022-03-15 21:30:55,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 21:30:55,320 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 21:30:55,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:55,322 INFO L225 Difference]: With dead ends: 204 [2022-03-15 21:30:55,322 INFO L226 Difference]: Without dead ends: 204 [2022-03-15 21:30:55,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 138 SyntacticMatches, 10 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-03-15 21:30:55,322 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 46 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:55,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 49 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:55,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-03-15 21:30:55,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 162. [2022-03-15 21:30:55,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 3.2236024844720497) internal successors, (519), 161 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:55,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 519 transitions. [2022-03-15 21:30:55,328 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 519 transitions. Word has length 19 [2022-03-15 21:30:55,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:55,328 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 519 transitions. [2022-03-15 21:30:55,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:55,328 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 519 transitions. [2022-03-15 21:30:55,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:30:55,329 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:55,329 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:55,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-15 21:30:55,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:55,543 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 21:30:55,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:55,544 INFO L85 PathProgramCache]: Analyzing trace with hash 179676343, now seen corresponding path program 1 times [2022-03-15 21:30:55,545 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:55,545 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994168163] [2022-03-15 21:30:55,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:55,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:55,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:55,581 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:55,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994168163] [2022-03-15 21:30:55,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994168163] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:55,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984771048] [2022-03-15 21:30:55,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:55,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:55,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:55,592 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:30:55,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 21:30:55,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:55,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-15 21:30:55,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:30:55,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:55,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:30:55,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984771048] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:55,681 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:55,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-03-15 21:30:55,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2091943817] [2022-03-15 21:30:55,681 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:55,683 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:55,697 INFO L252 McrAutomatonBuilder]: Finished intersection with 104 states and 242 transitions. [2022-03-15 21:30:55,697 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:56,640 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [3376#(or (<= N j) (< (+ j 1) N)), 3374#(< k N), 3378#(or (<= N j) (< k N) (< (+ j 1) N)), 3379#(or (<= (+ i 1) N) (< j N)), 3377#(or (< k N) (< j N)), 3380#(or (<= N j) (<= (+ i 1) N) (< (+ j 1) N)), 3383#(or (<= N j) (< k N) (<= (+ i 1) N) (< (+ j 1) N)), 3384#(and (or (= (+ j (* (- 1) i)) 0) (<= N k)) (or (<= N k) (= j 0)) (or (<= N k) (<= 1 N))), 3375#(< j N), 3382#(or (< k N) (<= (+ i 1) N) (< j N)), 3381#(or (< k N) (< i N))] [2022-03-15 21:30:56,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:30:56,640 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:56,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:30:56,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-03-15 21:30:56,641 INFO L87 Difference]: Start difference. First operand 162 states and 519 transitions. Second operand has 16 states, 16 states have (on average 5.3125) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:56,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:56,972 INFO L93 Difference]: Finished difference Result 292 states and 871 transitions. [2022-03-15 21:30:56,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 21:30:56,972 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:30:56,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:56,973 INFO L225 Difference]: With dead ends: 292 [2022-03-15 21:30:56,973 INFO L226 Difference]: Without dead ends: 292 [2022-03-15 21:30:56,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:30:56,974 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 126 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:56,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 98 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:30:56,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-03-15 21:30:56,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 192. [2022-03-15 21:30:56,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 3.282722513089005) internal successors, (627), 191 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:56,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 627 transitions. [2022-03-15 21:30:56,994 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 627 transitions. Word has length 20 [2022-03-15 21:30:56,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:56,994 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 627 transitions. [2022-03-15 21:30:56,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:56,994 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 627 transitions. [2022-03-15 21:30:56,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:56,995 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:56,995 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:57,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 21:30:57,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:57,207 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 21:30:57,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:57,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1854262835, now seen corresponding path program 1 times [2022-03-15 21:30:57,209 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:57,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112182484] [2022-03-15 21:30:57,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:57,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:57,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:57,295 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:57,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112182484] [2022-03-15 21:30:57,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112182484] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:57,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405302245] [2022-03-15 21:30:57,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:57,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:57,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:57,297 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:30:57,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 21:30:57,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:57,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:57,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:57,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2022-03-15 21:30:57,461 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 [2022-03-15 21:30:57,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:57,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:57,792 INFO L353 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2022-03-15 21:30:57,792 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 171 treesize of output 1 [2022-03-15 21:30:57,801 INFO L353 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2022-03-15 21:30:57,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 234 treesize of output 1 [2022-03-15 21:30:57,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:57,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405302245] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:57,805 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:57,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-03-15 21:30:57,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [52300858] [2022-03-15 21:30:57,805 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:57,806 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:57,816 INFO L252 McrAutomatonBuilder]: Finished intersection with 120 states and 286 transitions. [2022-03-15 21:30:57,816 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:59,964 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [4173#(<= min (+ max 1)), 4223#(and (or (= (select A j) (select A 0)) (< (select A j) max)) (or (not (< (select A j) max)) (= (select A 0) max)) (= (select A i) (select A 0))), 4224#(and (or (and (<= max (select A k)) (= k 0)) (<= (+ max 1) (select A 0))) (= j 0) (or (and (or (and (= k i) (= (select A 0) (+ (select A k) 1))) (and (not (= k i)) (= (select A i) (select A 0)))) (not (= k 0))) (and (= k 0) (or (= k i) (= (select A i) (+ (select A k) 1)))))), 4221#(and (or (<= min (select A j)) (< (select A j) max)) (or (<= min max) (not (< (select A j) max)))), 4220#(and (or (<= min (+ (select A j) 1)) (< (select A j) max)) (or (<= max (select A j)) (<= min (+ max 1)))), 4225#(and (= k 0) (= j 0) (or (= k i) (= (select A i) (+ (select A k) 1)))), 4222#(and (or (= (select A j) min) (< (select A j) max)) (= (select A 0) min) (or (not (< (select A j) max)) (= min max)) (= (select A i) (select A 0)))] [2022-03-15 21:30:59,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:30:59,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:59,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:30:59,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:30:59,965 INFO L87 Difference]: Start difference. First operand 192 states and 627 transitions. Second operand has 16 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:00,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:31:00,324 INFO L93 Difference]: Finished difference Result 513 states and 1714 transitions. [2022-03-15 21:31:00,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:31:00,324 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 21:31:00,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:31:00,326 INFO L225 Difference]: With dead ends: 513 [2022-03-15 21:31:00,326 INFO L226 Difference]: Without dead ends: 349 [2022-03-15 21:31:00,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 117 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=730, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:31:00,327 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 90 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:31:00,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 52 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:31:00,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-03-15 21:31:00,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 248. [2022-03-15 21:31:00,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 3.279352226720648) internal successors, (810), 247 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:00,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 810 transitions. [2022-03-15 21:31:00,333 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 810 transitions. Word has length 21 [2022-03-15 21:31:00,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:31:00,333 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 810 transitions. [2022-03-15 21:31:00,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:00,333 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 810 transitions. [2022-03-15 21:31:00,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:31:00,334 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:31:00,334 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:31:00,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-15 21:31:00,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:00,550 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 21:31:00,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:31:00,550 INFO L85 PathProgramCache]: Analyzing trace with hash -160927057, now seen corresponding path program 2 times [2022-03-15 21:31:00,551 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:31:00,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31107059] [2022-03-15 21:31:00,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:31:00,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:31:00,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:00,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:31:00,615 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:31:00,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31107059] [2022-03-15 21:31:00,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31107059] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:31:00,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529769304] [2022-03-15 21:31:00,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:31:00,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:00,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:31:00,616 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:31:00,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 21:31:00,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:31:00,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:31:00,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 21:31:00,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:31:00,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2022-03-15 21:31:00,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-15 21:31:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:31:00,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:31:00,952 INFO L353 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-03-15 21:31:00,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 143 treesize of output 1 [2022-03-15 21:31:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:31:00,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529769304] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:31:00,955 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:31:00,955 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-03-15 21:31:00,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1146329625] [2022-03-15 21:31:00,956 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:31:00,957 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:31:00,964 INFO L252 McrAutomatonBuilder]: Finished intersection with 79 states and 164 transitions. [2022-03-15 21:31:00,964 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:31:01,686 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [5385#(and (or (and (not (= k i)) (<= (select A i) (+ max 1))) (and (= k i) (<= (select A k) max))) (or (and (or (and (= k i) (= (select A 0) (+ (select A k) 1))) (and (not (= k i)) (= (select A i) (select A 0)))) (not (= k 0))) (and (= k 0) (or (= k i) (= (select A i) (+ (select A k) 1)))))), 5386#(and (or (not (= k i)) (= k 0) (= (select A 0) (+ (select A k) 1))) (or (= k i) (= (select A i) (+ (select A k) 1)) (not (= k 0))) (or (= k i) (= k 0) (= (select A i) (select A 0))))] [2022-03-15 21:31:01,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:31:01,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:31:01,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:31:01,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-03-15 21:31:01,687 INFO L87 Difference]: Start difference. First operand 248 states and 810 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:02,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:31:02,216 INFO L93 Difference]: Finished difference Result 595 states and 1966 transitions. [2022-03-15 21:31:02,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:31:02,216 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 21:31:02,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:31:02,218 INFO L225 Difference]: With dead ends: 595 [2022-03-15 21:31:02,218 INFO L226 Difference]: Without dead ends: 194 [2022-03-15 21:31:02,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 75 SyntacticMatches, 15 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=254, Invalid=616, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:31:02,219 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 77 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:31:02,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 33 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:31:02,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-03-15 21:31:02,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 168. [2022-03-15 21:31:02,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 3.161676646706587) internal successors, (528), 167 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:02,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 528 transitions. [2022-03-15 21:31:02,226 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 528 transitions. Word has length 21 [2022-03-15 21:31:02,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:31:02,226 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 528 transitions. [2022-03-15 21:31:02,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:02,226 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 528 transitions. [2022-03-15 21:31:02,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:31:02,226 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:31:02,226 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:31:02,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 21:31:02,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:02,439 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 21:31:02,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:31:02,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1755521274, now seen corresponding path program 3 times [2022-03-15 21:31:02,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:31:02,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308093849] [2022-03-15 21:31:02,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:31:02,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:31:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:02,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:31:02,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:31:02,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308093849] [2022-03-15 21:31:02,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308093849] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:31:02,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377471399] [2022-03-15 21:31:02,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:31:02,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:02,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:31:02,484 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:31:02,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 21:31:02,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 21:31:02,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:31:02,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 21:31:02,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:31:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:31:02,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:31:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:31:02,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377471399] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:31:02,600 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:31:02,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-15 21:31:02,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [511709966] [2022-03-15 21:31:02,600 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:31:02,601 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:31:02,620 INFO L252 McrAutomatonBuilder]: Finished intersection with 138 states and 338 transitions. [2022-03-15 21:31:02,621 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:31:03,755 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [6488#(and (or (<= N (+ k 1)) (= j 0)) (or (<= N (+ k 1)) (<= 2 N))), 6483#(or (<= N j) (<= (+ 2 j) N)), 6485#(or (< k N) (< j N)), 6484#(< k N), 6486#(or (<= N j) (<= (+ 2 j) N) (< k N)), 6487#(and (or (<= N k) (= j 0)) (or (<= N k) (<= 2 N)))] [2022-03-15 21:31:03,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:31:03,756 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:31:03,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:31:03,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-15 21:31:03,756 INFO L87 Difference]: Start difference. First operand 168 states and 528 transitions. Second operand has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 11 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:03,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:31:03,903 INFO L93 Difference]: Finished difference Result 251 states and 766 transitions. [2022-03-15 21:31:03,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 21:31:03,903 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 11 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 21:31:03,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:31:03,905 INFO L225 Difference]: With dead ends: 251 [2022-03-15 21:31:03,905 INFO L226 Difference]: Without dead ends: 251 [2022-03-15 21:31:03,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 144 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:31:03,905 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 101 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:31:03,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 65 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:31:03,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-03-15 21:31:03,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 200. [2022-03-15 21:31:03,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 3.221105527638191) internal successors, (641), 199 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:03,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 641 transitions. [2022-03-15 21:31:03,910 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 641 transitions. Word has length 22 [2022-03-15 21:31:03,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:31:03,910 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 641 transitions. [2022-03-15 21:31:03,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 11 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:03,910 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 641 transitions. [2022-03-15 21:31:03,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:31:03,910 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:31:03,911 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:31:03,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-15 21:31:04,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:04,118 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 21:31:04,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:31:04,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1133140115, now seen corresponding path program 4 times [2022-03-15 21:31:04,119 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:31:04,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208417419] [2022-03-15 21:31:04,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:31:04,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:31:04,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:31:04,156 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:31:04,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208417419] [2022-03-15 21:31:04,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208417419] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:31:04,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466444507] [2022-03-15 21:31:04,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:31:04,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:04,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:31:04,157 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:31:04,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 21:31:04,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:31:04,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:31:04,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 21:31:04,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:31:04,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:31:04,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:31:04,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:31:04,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466444507] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:31:04,291 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:31:04,291 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 8 [2022-03-15 21:31:04,292 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1560777851] [2022-03-15 21:31:04,292 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:31:04,294 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:31:04,301 INFO L252 McrAutomatonBuilder]: Finished intersection with 88 states and 186 transitions. [2022-03-15 21:31:04,302 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:31:04,713 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [7295#(<= N (+ k 1)), 7291#(< k N), 7294#(<= N k), 7293#(and (or (<= N k) (= j 0)) (or (<= N k) (<= 0 k))), 7259#(< j N), 7292#(or (< k N) (< j N))] [2022-03-15 21:31:04,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:31:04,713 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:31:04,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:31:04,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-15 21:31:04,714 INFO L87 Difference]: Start difference. First operand 200 states and 641 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:04,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:31:04,934 INFO L93 Difference]: Finished difference Result 398 states and 1338 transitions. [2022-03-15 21:31:04,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 21:31:04,934 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 21:31:04,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:31:04,936 INFO L225 Difference]: With dead ends: 398 [2022-03-15 21:31:04,936 INFO L226 Difference]: Without dead ends: 394 [2022-03-15 21:31:04,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:31:04,937 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 142 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:31:04,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 101 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:31:04,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-03-15 21:31:04,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 249. [2022-03-15 21:31:04,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 3.399193548387097) internal successors, (843), 248 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:04,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 843 transitions. [2022-03-15 21:31:04,946 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 843 transitions. Word has length 23 [2022-03-15 21:31:04,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:31:04,946 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 843 transitions. [2022-03-15 21:31:04,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:04,946 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 843 transitions. [2022-03-15 21:31:04,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:31:04,947 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:31:04,947 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:31:04,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 21:31:05,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:05,159 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 21:31:05,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:31:05,160 INFO L85 PathProgramCache]: Analyzing trace with hash -936972221, now seen corresponding path program 5 times [2022-03-15 21:31:05,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:31:05,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564326312] [2022-03-15 21:31:05,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:31:05,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:31:05,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:31:05,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:31:05,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564326312] [2022-03-15 21:31:05,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564326312] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:31:05,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91918115] [2022-03-15 21:31:05,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:31:05,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:05,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:31:05,192 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:31:05,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 21:31:05,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 21:31:05,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:31:05,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 21:31:05,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:31:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:31:05,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:31:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:31:05,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91918115] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:31:05,290 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:31:05,291 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2022-03-15 21:31:05,291 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [4938935] [2022-03-15 21:31:05,291 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:31:05,292 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:31:05,300 INFO L252 McrAutomatonBuilder]: Finished intersection with 90 states and 190 transitions. [2022-03-15 21:31:05,300 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:31:05,671 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [8319#(< j N), 8355#(<= N (+ 2 k)), 8354#(<= N (+ k 1)), 8352#(or (< k N) (< j N)), 8353#(<= N k), 8351#(< k N)] [2022-03-15 21:31:05,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:31:05,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:31:05,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:31:05,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-15 21:31:05,671 INFO L87 Difference]: Start difference. First operand 249 states and 843 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:05,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:31:05,906 INFO L93 Difference]: Finished difference Result 488 states and 1638 transitions. [2022-03-15 21:31:05,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:31:05,906 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 21:31:05,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:31:05,909 INFO L225 Difference]: With dead ends: 488 [2022-03-15 21:31:05,909 INFO L226 Difference]: Without dead ends: 479 [2022-03-15 21:31:05,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2022-03-15 21:31:05,909 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 194 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:31:05,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 95 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:31:05,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-03-15 21:31:05,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 290. [2022-03-15 21:31:05,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.4948096885813147) internal successors, (1010), 289 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) [2022-03-15 21:31:05,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 1010 transitions. [2022-03-15 21:31:05,916 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 1010 transitions. Word has length 23 [2022-03-15 21:31:05,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:31:05,916 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 1010 transitions. [2022-03-15 21:31:05,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:05,916 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 1010 transitions. [2022-03-15 21:31:05,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:31:05,917 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:31:05,917 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:31:05,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-15 21:31:06,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-15 21:31:06,127 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 21:31:06,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:31:06,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1915936859, now seen corresponding path program 6 times [2022-03-15 21:31:06,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:31:06,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542975837] [2022-03-15 21:31:06,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:31:06,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:31:06,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:06,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:31:06,190 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:31:06,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542975837] [2022-03-15 21:31:06,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542975837] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:31:06,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728069049] [2022-03-15 21:31:06,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:31:06,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:06,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:31:06,191 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:31:06,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 21:31:06,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 21:31:06,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:31:06,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 21:31:06,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:31:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:31:06,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:31:06,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:31:06,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728069049] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:31:06,289 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:31:06,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2022-03-15 21:31:06,289 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2098031431] [2022-03-15 21:31:06,289 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:31:06,290 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:31:06,305 INFO L252 McrAutomatonBuilder]: Finished intersection with 160 states and 399 transitions. [2022-03-15 21:31:06,306 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:31:08,087 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 23 new interpolants: [9598#(or (<= N j) (<= (+ 2 i) N) (< (+ j 1) N)), 9596#(or (<= N j) (< k N) (< (+ j 1) N)), 9591#(or (< k N) (< j N)), 9603#(or (< (+ 2 j) N) (<= N (+ j 1)) (<= (+ 2 i) N)), 9601#(or (< (+ 2 j) N) (< k N) (<= N (+ j 1))), 9592#(or (< k N) (<= (+ i 1) N) (< j N)), 9594#(or (<= N j) (< (+ j 1) N)), 9589#(or (< k N) (< i N)), 9590#(or (< k N) (<= (+ 2 i) N)), 9587#(or (< j N) (<= (+ 2 i) N)), 9604#(or (< (+ 2 j) N) (< k N) (<= N (+ j 1)) (< i N)), 9599#(or (<= N j) (< k N) (<= (+ 2 i) N) (< (+ j 1) N)), 9588#(< k N), 9605#(or (< (+ 2 j) N) (< k N) (<= N (+ j 1)) (<= (+ 2 i) N)), 9600#(or (< (+ 2 j) N) (<= N (+ j 1))), 9602#(or (< (+ 2 j) N) (<= N (+ j 1)) (< i N)), 9586#(or (<= (+ i 1) N) (< j N)), 9607#(and (or (<= N (+ k 1)) (= j 0)) (or (<= N (+ k 1)) (<= 2 N)) (or (<= N (+ k 1)) (= (+ j (* (- 1) i)) 0))), 9595#(or (<= N j) (<= (+ i 1) N) (< (+ j 1) N)), 9597#(or (<= N j) (< k N) (<= (+ i 1) N) (< (+ j 1) N)), 9585#(< j N), 9606#(and (or (= (+ j (* (- 1) i)) 0) (<= N k)) (or (<= N k) (= j 0)) (or (<= N k) (<= 2 N))), 9593#(or (< k N) (< j N) (<= (+ 2 i) N))] [2022-03-15 21:31:08,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 21:31:08,087 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:31:08,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 21:31:08,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:31:08,088 INFO L87 Difference]: Start difference. First operand 290 states and 1010 transitions. Second operand has 30 states, 30 states have (on average 4.633333333333334) internal successors, (139), 29 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:09,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:31:09,241 INFO L93 Difference]: Finished difference Result 1019 states and 3617 transitions. [2022-03-15 21:31:09,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 21:31:09,241 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.633333333333334) internal successors, (139), 29 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have 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 [2022-03-15 21:31:09,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:31:09,246 INFO L225 Difference]: With dead ends: 1019 [2022-03-15 21:31:09,246 INFO L226 Difference]: Without dead ends: 1019 [2022-03-15 21:31:09,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 151 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1102, Invalid=3728, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 21:31:09,247 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 478 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:31:09,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 140 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:31:09,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2022-03-15 21:31:09,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 554. [2022-03-15 21:31:09,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 3.7757685352622063) internal successors, (2088), 553 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:09,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 2088 transitions. [2022-03-15 21:31:09,263 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 2088 transitions. Word has length 23 [2022-03-15 21:31:09,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:31:09,263 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 2088 transitions. [2022-03-15 21:31:09,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.633333333333334) internal successors, (139), 29 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:09,263 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 2088 transitions. [2022-03-15 21:31:09,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:31:09,265 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:31:09,265 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:31:09,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-15 21:31:09,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:09,479 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 21:31:09,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:31:09,480 INFO L85 PathProgramCache]: Analyzing trace with hash 430205609, now seen corresponding path program 7 times [2022-03-15 21:31:09,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:31:09,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502671803] [2022-03-15 21:31:09,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:31:09,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:31:09,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:09,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:31:09,577 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:31:09,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502671803] [2022-03-15 21:31:09,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502671803] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:31:09,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583079094] [2022-03-15 21:31:09,577 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:31:09,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:09,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:31:09,578 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:31:09,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 21:31:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:09,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:31:09,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:31:09,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 33 [2022-03-15 21:31:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:31:09,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:31:10,716 INFO L353 Elim1Store]: treesize reduction 96, result has 1.0 percent of original size [2022-03-15 21:31:10,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 146 treesize of output 1 [2022-03-15 21:31:10,721 INFO L353 Elim1Store]: treesize reduction 96, result has 1.0 percent of original size [2022-03-15 21:31:10,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 224 treesize of output 1 [2022-03-15 21:31:10,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:31:10,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583079094] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-15 21:31:10,726 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-15 21:31:10,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 8] total 19 [2022-03-15 21:31:10,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1281594207] [2022-03-15 21:31:10,726 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:31:10,728 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:31:10,746 INFO L252 McrAutomatonBuilder]: Finished intersection with 184 states and 467 transitions. [2022-03-15 21:31:10,746 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:31:32,985 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [11975#(and (or (<= (select A 0) (select A (+ j 1))) (<= min (+ (select A 0) 1)) (<= (select A 0) (select A j))) (or (< (select A (+ j 1)) (select A 0)) (not (< (select A j) (select A 0))) (<= min (+ (select A (+ j 1)) 1))) (or (< (select A (+ j 1)) (select A j)) (< (select A j) (select A 0)) (<= min (+ (select A (+ j 1)) 1))) (or (<= (select A j) (select A (+ j 1))) (<= min (+ (select A j) 1)) (< (select A j) (select A 0)))), 11976#(and (or (< (select A (+ j 1)) (select A 0)) (not (< (select A j) (select A 0))) (<= (select A i) (+ (select A (+ j 1)) 1)) (< min (select A i))) (or (< (select A (+ j 1)) (select A j)) (< (select A j) (select A 0)) (not (< min (select A i))) (<= min (+ (select A (+ j 1)) 1))) (or (< (select A (+ j 1)) (select A 0)) (not (< min (select A i))) (not (< (select A j) (select A 0))) (<= min (+ (select A (+ j 1)) 1))) (or (< (select A (+ j 1)) (select A j)) (< (select A j) (select A 0)) (<= (select A i) (+ (select A (+ j 1)) 1)) (< min (select A i))) (or (< (select A j) (select A 0)) (not (< (select A (+ j 1)) (select A j))) (<= (select A i) (+ (select A j) 1)) (< min (select A i))) (or (<= (select A 0) (select A (+ j 1))) (<= min (+ (select A 0) 1)) (<= (select A i) min) (<= (select A 0) (select A j))) (or (not (< (select A (+ j 1)) (select A 0))) (<= (select A i) (+ (select A 0) 1)) (not (< (select A j) (select A 0))) (< min (select A i))) (or (<= (select A j) (select A (+ j 1))) (<= min (+ (select A j) 1)) (< (select A j) (select A 0)) (not (< min (select A i))))), 11972#(and (or (< (select A j) max) (not (< (select A (+ j 1)) (select A j))) (<= (select A i) (+ (select A j) 1)) (< min (select A i))) (or (< (select A (+ j 1)) (select A j)) (not (< min (select A i))) (< (select A j) max) (<= min (+ (select A (+ j 1)) 1))) (or (not (< (select A j) max)) (<= (select A i) (+ (select A (+ j 1)) 1)) (< (select A (+ j 1)) max) (< min (select A i))) (or (not (< (select A j) max)) (not (< min (select A i))) (<= min (+ (select A (+ j 1)) 1)) (< (select A (+ j 1)) max)) (or (<= (select A j) (select A (+ j 1))) (<= min (+ (select A j) 1)) (not (< min (select A i))) (< (select A j) max)) (or (not (< (select A j) max)) (<= (select A i) (+ max 1)) (< min (select A i)) (not (< (select A (+ j 1)) max))) (or (< (select A (+ j 1)) (select A j)) (< (select A j) max) (<= (select A i) (+ (select A (+ j 1)) 1)) (< min (select A i))) (or (<= max (select A j)) (<= max (select A (+ j 1))) (<= (select A i) min) (<= min (+ max 1)))), 11971#(and (or (<= (select A j) (select A (+ j 1))) (<= min (+ (select A j) 1)) (< (select A j) max)) (or (not (< (select A j) max)) (<= min (+ (select A (+ j 1)) 1)) (< (select A (+ j 1)) max)) (or (< (select A (+ j 1)) (select A j)) (< (select A j) max) (<= min (+ (select A (+ j 1)) 1))) (or (<= max (select A j)) (<= max (select A (+ j 1))) (<= min (+ max 1)))), 11977#(and (or (< (select A (+ j 1)) (select A 0)) (< min (select A (+ i 1))) (<= (select A (+ i 1)) (+ (select A (+ j 1)) 1)) (not (< min (select A i))) (not (< (select A j) (select A 0)))) (or (< (select A (+ j 1)) (select A 0)) (not (< (select A i) (select A (+ i 1)))) (not (< (select A j) (select A 0))) (<= (select A i) (+ (select A (+ j 1)) 1)) (< min (select A i))) (or (not (< (select A (+ j 1)) (select A 0))) (<= (select A i) (+ (select A 0) 1)) (not (< (select A i) (select A (+ i 1)))) (not (< (select A j) (select A 0))) (< min (select A i))) (or (< min (select A (+ i 1))) (<= (select A (+ i 1)) (+ (select A 0) 1)) (<= (select A 0) (select A (+ j 1))) (<= (select A i) min) (<= (select A 0) (select A j))) (or (< (select A (+ j 1)) (select A j)) (< (select A j) (select A 0)) (< (select A i) (select A (+ i 1))) (<= (select A (+ i 1)) (+ (select A (+ j 1)) 1)) (< min (select A i))) (or (< min (select A (+ i 1))) (<= (select A (+ i 1)) (+ (select A j) 1)) (< (select A j) (select A 0)) (not (< min (select A i))) (not (< (select A (+ j 1)) (select A j)))) (or (< min (select A (+ i 1))) (< (select A (+ j 1)) (select A j)) (< (select A j) (select A 0)) (<= (select A (+ i 1)) (+ (select A (+ j 1)) 1)) (not (< min (select A i)))) (or (< (select A (+ j 1)) (select A 0)) (< (select A i) (select A (+ i 1))) (<= (select A (+ i 1)) (+ (select A (+ j 1)) 1)) (not (< (select A j) (select A 0))) (< min (select A i))) (or (<= (select A (+ i 1)) (+ (select A j) 1)) (< (select A j) (select A 0)) (< (select A i) (select A (+ i 1))) (not (< (select A (+ j 1)) (select A j))) (< min (select A i))) (or (< (select A (+ j 1)) (select A 0)) (not (< min (select A i))) (not (< (select A j) (select A 0))) (<= min (+ (select A (+ j 1)) 1)) (not (< min (select A (+ i 1))))) (or (< (select A (+ j 1)) (select A j)) (< (select A j) (select A 0)) (not (< (select A i) (select A (+ i 1)))) (<= (select A i) (+ (select A (+ j 1)) 1)) (< min (select A i))) (or (not (< (select A (+ j 1)) (select A 0))) (<= (select A (+ i 1)) (+ (select A 0) 1)) (< (select A i) (select A (+ i 1))) (not (< (select A j) (select A 0))) (< min (select A i))) (or (<= (select A j) (select A (+ j 1))) (< (select A j) (select A 0)) (not (< (select A i) (select A (+ i 1)))) (<= (select A i) (+ (select A j) 1)) (< min (select A i))) (or (<= (select A j) (select A (+ j 1))) (<= min (+ (select A j) 1)) (< (select A j) (select A 0)) (not (< min (select A i))) (not (< min (select A (+ i 1))))) (or (<= (select A (+ i 1)) min) (<= (select A 0) (select A (+ j 1))) (not (< min (select A i))) (<= min (+ (select A 0) 1)) (<= (select A 0) (select A j))) (or (< (select A (+ j 1)) (select A j)) (< (select A j) (select A 0)) (not (< min (select A i))) (<= min (+ (select A (+ j 1)) 1)) (not (< min (select A (+ i 1)))))), 11969#(and (or (<= min (+ (select A j) 1)) (< (select A j) max)) (or (<= max (select A j)) (<= min (+ max 1)))), 11973#(and (or (<= (select A (+ i 1)) (+ (select A j) 1)) (< (select A i) (select A (+ i 1))) (< (select A j) max) (< min (select A i))) (or (<= (select A (+ i 1)) (+ max 1)) (< (select A i) (select A (+ i 1))) (not (< (select A j) max)) (< min (select A i))) (or (not (< (select A j) max)) (not (< (select A i) (select A (+ i 1)))) (<= (select A i) (+ max 1)) (< min (select A i))) (or (not (< (select A i) (select A (+ i 1)))) (< (select A j) max) (<= (select A i) (+ (select A j) 1)) (< min (select A i))) (or (<= max (select A j)) (not (< min (select A i))) (<= min (+ max 1)) (not (< min (select A (+ i 1))))) (or (<= min (+ (select A j) 1)) (not (< min (select A i))) (< (select A j) max) (not (< min (select A (+ i 1))))) (or (<= (select A (+ i 1)) (+ max 1)) (< min (select A (+ i 1))) (not (< (select A j) max)) (not (< min (select A i)))) (or (< min (select A (+ i 1))) (<= (select A (+ i 1)) (+ (select A j) 1)) (not (< min (select A i))) (< (select A j) max))), 11974#(and (or (< (select A (+ j 1)) (select A j)) (< (select A i) (select A (+ i 1))) (<= (select A (+ i 1)) (+ (select A (+ j 1)) 1)) (< (select A j) max) (< min (select A i))) (or (<= (select A j) (select A (+ j 1))) (<= min (+ (select A j) 1)) (not (< min (select A i))) (< (select A j) max) (not (< min (select A (+ i 1))))) (or (not (< (select A j) max)) (not (< (select A i) (select A (+ i 1)))) (<= (select A i) (+ (select A (+ j 1)) 1)) (< (select A (+ j 1)) max) (< min (select A i))) (or (< (select A (+ j 1)) (select A j)) (not (< (select A i) (select A (+ i 1)))) (< (select A j) max) (<= (select A i) (+ (select A (+ j 1)) 1)) (< min (select A i))) (or (< min (select A (+ i 1))) (< (select A (+ j 1)) (select A j)) (<= (select A (+ i 1)) (+ (select A (+ j 1)) 1)) (not (< min (select A i))) (< (select A j) max)) (or (< (select A (+ j 1)) (select A j)) (not (< min (select A i))) (< (select A j) max) (<= min (+ (select A (+ j 1)) 1)) (not (< min (select A (+ i 1))))) (or (not (< (select A j) max)) (not (< (select A i) (select A (+ i 1)))) (<= (select A i) (+ max 1)) (< min (select A i)) (not (< (select A (+ j 1)) max))) (or (< (select A i) (select A (+ i 1))) (<= (select A (+ i 1)) (+ (select A (+ j 1)) 1)) (not (< (select A j) max)) (< (select A (+ j 1)) max) (< min (select A i))) (or (<= max (select A j)) (<= (select A (+ i 1)) min) (<= max (select A (+ j 1))) (not (< min (select A i))) (<= min (+ max 1))) (or (not (< (select A j) max)) (not (< min (select A i))) (<= min (+ (select A (+ j 1)) 1)) (not (< min (select A (+ i 1)))) (< (select A (+ j 1)) max)) (or (<= (select A (+ i 1)) (+ max 1)) (< min (select A (+ i 1))) (<= max (select A j)) (<= max (select A (+ j 1))) (<= (select A i) min)) (or (<= (select A j) (select A (+ j 1))) (not (< (select A i) (select A (+ i 1)))) (< (select A j) max) (<= (select A i) (+ (select A j) 1)) (< min (select A i))) (or (< min (select A (+ i 1))) (<= (select A (+ i 1)) (+ (select A j) 1)) (not (< min (select A i))) (< (select A j) max) (not (< (select A (+ j 1)) (select A j)))) (or (<= (select A (+ i 1)) (+ max 1)) (< (select A i) (select A (+ i 1))) (not (< (select A j) max)) (< min (select A i)) (not (< (select A (+ j 1)) max))) (or (<= (select A (+ i 1)) (+ (select A j) 1)) (< (select A i) (select A (+ i 1))) (< (select A j) max) (not (< (select A (+ j 1)) (select A j))) (< min (select A i))) (or (< min (select A (+ i 1))) (<= (select A (+ i 1)) (+ (select A (+ j 1)) 1)) (not (< (select A j) max)) (not (< min (select A i))) (< (select A (+ j 1)) max))), 11970#(and (or (<= min (+ (select A j) 1)) (not (< min (select A i))) (< (select A j) max)) (or (not (< (select A j) max)) (<= (select A i) (+ max 1)) (< min (select A i))) (or (< (select A j) max) (<= (select A i) (+ (select A j) 1)) (< min (select A i))) (or (<= max (select A j)) (not (< min (select A i))) (<= min (+ max 1))))] [2022-03-15 21:31:32,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:31:32,986 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:31:32,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:31:32,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-03-15 21:31:32,986 INFO L87 Difference]: Start difference. First operand 554 states and 2088 transitions. Second operand has 18 states, 17 states have (on average 5.411764705882353) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:34,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:31:34,054 INFO L93 Difference]: Finished difference Result 1337 states and 5062 transitions. [2022-03-15 21:31:34,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:31:34,055 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 5.411764705882353) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:31:34,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:31:34,060 INFO L225 Difference]: With dead ends: 1337 [2022-03-15 21:31:34,060 INFO L226 Difference]: Without dead ends: 1107 [2022-03-15 21:31:34,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 168 SyntacticMatches, 28 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=389, Invalid=1093, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:31:34,060 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 129 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:31:34,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 47 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:31:34,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2022-03-15 21:31:34,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 618. [2022-03-15 21:31:34,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 3.773095623987034) internal successors, (2328), 617 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:34,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 2328 transitions. [2022-03-15 21:31:34,074 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 2328 transitions. Word has length 24 [2022-03-15 21:31:34,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:31:34,075 INFO L470 AbstractCegarLoop]: Abstraction has 618 states and 2328 transitions. [2022-03-15 21:31:34,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 5.411764705882353) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:34,075 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 2328 transitions. [2022-03-15 21:31:34,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:31:34,076 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:31:34,076 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:31:34,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-15 21:31:34,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-15 21:31:34,292 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 21:31:34,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:31:34,293 INFO L85 PathProgramCache]: Analyzing trace with hash -432831443, now seen corresponding path program 8 times [2022-03-15 21:31:34,293 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:31:34,293 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752680192] [2022-03-15 21:31:34,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:31:34,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:31:34,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:34,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:31:34,414 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:31:34,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752680192] [2022-03-15 21:31:34,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752680192] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:31:34,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337140366] [2022-03-15 21:31:34,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:31:34,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:34,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:31:34,416 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:31:34,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 21:31:34,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:31:34,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:31:34,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:31:34,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:31:34,566 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 [2022-03-15 21:31:34,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:31:34,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:31:35,025 INFO L353 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2022-03-15 21:31:35,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 1 [2022-03-15 21:31:35,029 INFO L353 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2022-03-15 21:31:35,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 1 [2022-03-15 21:31:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:31:35,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337140366] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:31:35,036 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:31:35,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 16 [2022-03-15 21:31:35,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [646812180] [2022-03-15 21:31:35,037 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:31:35,038 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:31:35,052 INFO L252 McrAutomatonBuilder]: Finished intersection with 125 states and 296 transitions. [2022-03-15 21:31:35,052 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:31:38,595 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [14740#(and (<= (select A i) min) (= (select A i) (select A 0))), 14741#(and (or (<= (select A 0) max) (not (< (select A j) max))) (or (< (select A j) max) (<= (select A 0) (select A j))) (= (select A i) (select A 0))), 14735#(and (or (<= min (select A j)) (< (select A j) max)) (or (<= min max) (<= max (select A j)))), 14743#(= (select A i) (select A 0)), 14736#(and (or (<= min max) (not (< (select A j) max)) (<= max (select A (+ j 1)))) (or (<= min (select A (+ j 1))) (not (< (select A j) max)) (< (select A (+ j 1)) max)) (or (<= min (select A (+ j 1))) (< (select A (+ j 1)) (select A j)) (< (select A j) max)) (or (<= (select A j) (select A (+ j 1))) (<= min (select A j)) (< (select A j) max))), 14738#(and (or (< (select A j) max) (not (< (select A (+ j 1)) (select A j))) (<= (select A 0) (select A j))) (or (not (< (select A j) max)) (<= (select A 0) (select A (+ j 1))) (< (select A (+ j 1)) max)) (or (< (select A (+ j 1)) (select A j)) (<= (select A 0) (select A (+ j 1))) (< (select A j) max)) (or (<= (select A 0) max) (not (< (select A j) max)) (not (< (select A (+ j 1)) max))) (<= (select A i) min) (= (select A i) (select A 0))), 14742#(and (or (< (select A j) max) (not (< (select A (+ j 1)) (select A j))) (<= (select A 0) (select A j))) (or (not (< (select A j) max)) (<= (select A 0) (select A (+ j 1))) (< (select A (+ j 1)) max)) (or (< (select A (+ j 1)) (select A j)) (<= (select A 0) (select A (+ j 1))) (< (select A j) max)) (or (<= (select A 0) max) (not (< (select A j) max)) (not (< (select A (+ j 1)) max))) (= (select A i) (select A 0))), 14739#(and (or (<= (select A j) (select A (+ j 1))) (<= min (select A j)) (< (select A j) (select A 0))) (or (< (select A (+ j 1)) (select A 0)) (<= min (select A (+ j 1))) (not (< (select A j) (select A 0)))) (or (<= min (select A 0)) (<= (select A 0) (select A (+ j 1))) (not (< (select A j) (select A 0)))) (or (<= min (select A (+ j 1))) (< (select A (+ j 1)) (select A j)) (< (select A j) (select A 0)))), 14737#(and (<= (select A i) min) (or (<= (select A 0) max) (not (< (select A j) max))) (or (< (select A j) max) (<= (select A 0) (select A j))) (= (select A i) (select A 0)))] [2022-03-15 21:31:38,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:31:38,596 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:31:38,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:31:38,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:31:38,596 INFO L87 Difference]: Start difference. First operand 618 states and 2328 transitions. Second operand has 18 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:39,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:31:39,205 INFO L93 Difference]: Finished difference Result 1745 states and 6570 transitions. [2022-03-15 21:31:39,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 21:31:39,206 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:31:39,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:31:39,211 INFO L225 Difference]: With dead ends: 1745 [2022-03-15 21:31:39,211 INFO L226 Difference]: Without dead ends: 1110 [2022-03-15 21:31:39,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 121 SyntacticMatches, 9 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=383, Invalid=1177, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:31:39,212 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 122 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:31:39,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 42 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:31:39,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2022-03-15 21:31:39,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 570. [2022-03-15 21:31:39,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 3.759226713532513) internal successors, (2139), 569 states have internal predecessors, (2139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:39,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 2139 transitions. [2022-03-15 21:31:39,228 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 2139 transitions. Word has length 24 [2022-03-15 21:31:39,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:31:39,228 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 2139 transitions. [2022-03-15 21:31:39,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:39,228 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 2139 transitions. [2022-03-15 21:31:39,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:31:39,230 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:31:39,230 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:31:39,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 21:31:39,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-15 21:31:39,434 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 21:31:39,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:31:39,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1390488548, now seen corresponding path program 9 times [2022-03-15 21:31:39,435 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:31:39,435 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376708162] [2022-03-15 21:31:39,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:31:39,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:31:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:31:39,500 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:31:39,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376708162] [2022-03-15 21:31:39,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376708162] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:31:39,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652758864] [2022-03-15 21:31:39,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:31:39,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:39,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:31:39,501 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:31:39,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 21:31:39,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 21:31:39,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:31:39,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 21:31:39,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:31:39,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:31:39,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:31:39,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:31:39,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652758864] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:31:39,647 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:31:39,647 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 21:31:39,647 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [666954061] [2022-03-15 21:31:39,648 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:31:39,649 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:31:39,660 INFO L252 McrAutomatonBuilder]: Finished intersection with 101 states and 213 transitions. [2022-03-15 21:31:39,660 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:31:40,366 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [17817#(or (< k N) (< i N)), 17822#(and (or (<= 3 N) (<= N (+ 2 k))) (or (<= N (+ 2 k)) (= i 0))), 17820#(and (or (< k N) (= i 0)) (or (<= 3 N) (< k N))), 17819#(and (or (<= 3 N) (<= N k)) (or (<= N k) (= i 0))), 17816#(< k N), 17818#(or (< k N) (<= (+ 2 i) N)), 17821#(and (or (<= N (+ k 1)) (= i 0)) (or (<= N (+ k 1)) (<= 3 N)))] [2022-03-15 21:31:40,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:31:40,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:31:40,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:31:40,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:31:40,367 INFO L87 Difference]: Start difference. First operand 570 states and 2139 transitions. Second operand has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:40,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:31:40,506 INFO L93 Difference]: Finished difference Result 785 states and 2793 transitions. [2022-03-15 21:31:40,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:31:40,506 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 21:31:40,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:31:40,518 INFO L225 Difference]: With dead ends: 785 [2022-03-15 21:31:40,518 INFO L226 Difference]: Without dead ends: 785 [2022-03-15 21:31:40,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 107 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:31:40,519 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 110 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:31:40,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 46 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:31:40,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-03-15 21:31:40,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 398. [2022-03-15 21:31:40,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 3.566750629722922) internal successors, (1416), 397 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:40,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1416 transitions. [2022-03-15 21:31:40,528 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1416 transitions. Word has length 25 [2022-03-15 21:31:40,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:31:40,528 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1416 transitions. [2022-03-15 21:31:40,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:40,528 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1416 transitions. [2022-03-15 21:31:40,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:31:40,532 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:31:40,532 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:31:40,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 21:31:40,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-15 21:31:40,747 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 21:31:40,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:31:40,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1469779860, now seen corresponding path program 10 times [2022-03-15 21:31:40,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:31:40,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487772417] [2022-03-15 21:31:40,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:31:40,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:31:40,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:31:40,815 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:31:40,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487772417] [2022-03-15 21:31:40,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487772417] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:31:40,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188843878] [2022-03-15 21:31:40,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:31:40,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:40,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:31:40,816 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:31:40,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 21:31:40,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:31:40,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:31:40,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 21:31:40,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:31:40,906 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 21:31:40,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:31:40,960 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 21:31:40,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188843878] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:31:40,960 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:31:40,960 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 11 [2022-03-15 21:31:40,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1122607087] [2022-03-15 21:31:40,961 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:31:40,962 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:31:40,976 INFO L252 McrAutomatonBuilder]: Finished intersection with 109 states and 233 transitions. [2022-03-15 21:31:40,976 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:31:42,035 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 16 new interpolants: [19587#(or (<= (+ 3 j) N) (< k N) (< i N)), 19591#(and (or (<= 3 N) (<= N (+ 2 k))) (or (= (+ i (* (- 1) j)) 0) (<= N (+ 2 k))) (or (<= N (+ 2 k)) (= i 0))), 19588#(and (or (= (+ i (* (- 1) j)) 0) (< k N)) (or (< k N) (= i 0)) (or (<= 3 N) (< k N))), 19590#(and (or (<= N (+ k 1)) (= i 0)) (or (<= N (+ k 1)) (<= 3 N)) (or (<= N (+ k 1)) (= (+ i (* (- 1) j)) 0))), 19581#(or (< k N) (< j N)), 19578#(or (<= (+ 2 j) N) (< i N)), 19583#(or (<= (+ j 1) N) (< k N) (< i N)), 19586#(or (<= (+ 3 j) N) (< k N)), 19580#(< k N), 19579#(or (<= (+ 3 j) N) (< i N)), 19582#(or (< k N) (< i N)), 19576#(< i N), 19584#(or (<= (+ 2 j) N) (< k N)), 19589#(and (or (<= 3 N) (<= N k)) (or (= (+ i (* (- 1) j)) 0) (<= N k)) (or (<= N k) (= i 0))), 19577#(or (<= (+ j 1) N) (< i N)), 19585#(or (<= (+ 2 j) N) (< k N) (< i N))] [2022-03-15 21:31:42,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:31:42,035 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:31:42,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:31:42,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:31:42,036 INFO L87 Difference]: Start difference. First operand 398 states and 1416 transitions. Second operand has 25 states, 25 states have (on average 3.44) internal successors, (86), 24 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) [2022-03-15 21:31:42,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:31:42,437 INFO L93 Difference]: Finished difference Result 888 states and 2967 transitions. [2022-03-15 21:31:42,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 21:31:42,437 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.44) internal successors, (86), 24 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 26 [2022-03-15 21:31:42,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:31:42,441 INFO L225 Difference]: With dead ends: 888 [2022-03-15 21:31:42,441 INFO L226 Difference]: Without dead ends: 888 [2022-03-15 21:31:42,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 102 SyntacticMatches, 12 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=1285, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:31:42,442 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 309 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:31:42,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 96 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:31:42,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2022-03-15 21:31:42,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 432. [2022-03-15 21:31:42,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.5382830626450117) internal successors, (1525), 431 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:42,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1525 transitions. [2022-03-15 21:31:42,453 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1525 transitions. Word has length 26 [2022-03-15 21:31:42,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:31:42,453 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1525 transitions. [2022-03-15 21:31:42,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.44) internal successors, (86), 24 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) [2022-03-15 21:31:42,453 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1525 transitions. [2022-03-15 21:31:42,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:31:42,455 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:31:42,456 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:31:42,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 21:31:42,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-15 21:31:42,667 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 21:31:42,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:31:42,668 INFO L85 PathProgramCache]: Analyzing trace with hash 2061682942, now seen corresponding path program 11 times [2022-03-15 21:31:42,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:31:42,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785154882] [2022-03-15 21:31:42,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:31:42,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:31:42,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:42,719 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 21:31:42,719 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:31:42,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785154882] [2022-03-15 21:31:42,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785154882] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:31:42,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42015346] [2022-03-15 21:31:42,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:31:42,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:42,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:31:42,721 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:31:42,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 21:31:42,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 21:31:42,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:31:42,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 21:31:42,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:31:42,818 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:31:42,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:31:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:31:42,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42015346] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:31:42,858 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:31:42,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 21:31:42,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [689467219] [2022-03-15 21:31:42,858 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:31:42,860 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:31:42,875 INFO L252 McrAutomatonBuilder]: Finished intersection with 132 states and 306 transitions. [2022-03-15 21:31:42,875 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:31:43,865 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [21541#(and (or (<= N (+ k 1)) (= j 0)) (or (<= N (+ k 1)) (<= 0 k))), 21539#(or (<= N j) (<= (+ 2 j) N) (< k N)), 21540#(and (or (<= N k) (<= 1 k)) (or (<= N k) (= j 0))), 21538#(or (<= N j) (<= (+ 2 j) N)), 21537#(or (< k N) (< j N)), 21536#(< k N)] [2022-03-15 21:31:43,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:31:43,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:31:43,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:31:43,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-03-15 21:31:43,866 INFO L87 Difference]: Start difference. First operand 432 states and 1525 transitions. Second operand has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 13 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:44,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:31:44,087 INFO L93 Difference]: Finished difference Result 782 states and 2682 transitions. [2022-03-15 21:31:44,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 21:31:44,088 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 13 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 21:31:44,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:31:44,091 INFO L225 Difference]: With dead ends: 782 [2022-03-15 21:31:44,091 INFO L226 Difference]: Without dead ends: 782 [2022-03-15 21:31:44,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 137 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:31:44,092 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 141 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:31:44,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 77 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:31:44,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-03-15 21:31:44,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 434. [2022-03-15 21:31:44,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.533487297921478) internal successors, (1530), 433 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:44,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1530 transitions. [2022-03-15 21:31:44,101 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1530 transitions. Word has length 26 [2022-03-15 21:31:44,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:31:44,101 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1530 transitions. [2022-03-15 21:31:44,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 13 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:44,101 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1530 transitions. [2022-03-15 21:31:44,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:31:44,102 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:31:44,102 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:31:44,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-15 21:31:44,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:44,316 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 21:31:44,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:31:44,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1285296970, now seen corresponding path program 12 times [2022-03-15 21:31:44,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:31:44,317 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49558519] [2022-03-15 21:31:44,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:31:44,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:31:44,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:44,361 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 21:31:44,361 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:31:44,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49558519] [2022-03-15 21:31:44,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49558519] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:31:44,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186766918] [2022-03-15 21:31:44,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:31:44,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:44,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:31:44,362 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:31:44,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 21:31:44,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 21:31:44,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:31:44,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 21:31:44,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:31:44,468 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:31:44,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:31:44,512 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:31:44,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186766918] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:31:44,513 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:31:44,513 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 21:31:44,513 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1453268913] [2022-03-15 21:31:44,513 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:31:44,515 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:31:44,527 INFO L252 McrAutomatonBuilder]: Finished intersection with 106 states and 229 transitions. [2022-03-15 21:31:44,527 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:31:45,062 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [23372#(< k N), 23376#(<= N k), 23374#(and (or (<= N k) (<= 1 k)) (or (<= N k) (= j 0))), 23375#(and (or (<= N (+ k 1)) (= j 0)) (or (<= N (+ k 1)) (<= 0 k))), 23373#(or (< k N) (< j N))] [2022-03-15 21:31:45,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:31:45,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:31:45,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:31:45,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-03-15 21:31:45,063 INFO L87 Difference]: Start difference. First operand 434 states and 1530 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:45,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:31:45,241 INFO L93 Difference]: Finished difference Result 775 states and 2744 transitions. [2022-03-15 21:31:45,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:31:45,241 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 21:31:45,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:31:45,244 INFO L225 Difference]: With dead ends: 775 [2022-03-15 21:31:45,244 INFO L226 Difference]: Without dead ends: 773 [2022-03-15 21:31:45,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 112 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:31:45,245 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 97 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:31:45,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 82 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:31:45,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-03-15 21:31:45,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 468. [2022-03-15 21:31:45,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.6937901498929335) internal successors, (1725), 467 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:45,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1725 transitions. [2022-03-15 21:31:45,254 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1725 transitions. Word has length 26 [2022-03-15 21:31:45,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:31:45,254 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 1725 transitions. [2022-03-15 21:31:45,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:45,254 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1725 transitions. [2022-03-15 21:31:45,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:31:45,255 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:31:45,255 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:31:45,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 21:31:45,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-15 21:31:45,471 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 21:31:45,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:31:45,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1964415862, now seen corresponding path program 13 times [2022-03-15 21:31:45,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:31:45,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397046410] [2022-03-15 21:31:45,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:31:45,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:31:45,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:45,508 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 21:31:45,508 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:31:45,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397046410] [2022-03-15 21:31:45,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397046410] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:31:45,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758027680] [2022-03-15 21:31:45,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:31:45,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:45,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:31:45,510 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:31:45,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 21:31:45,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:45,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 21:31:45,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:31:45,572 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 21:31:45,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:31:45,619 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 21:31:45,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758027680] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:31:45,620 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:31:45,620 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-15 21:31:45,620 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [760696208] [2022-03-15 21:31:45,620 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:31:45,622 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:31:45,642 INFO L252 McrAutomatonBuilder]: Finished intersection with 109 states and 235 transitions. [2022-03-15 21:31:45,642 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:31:46,119 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [25262#(<= N (+ k 1)), 25259#(< k N), 25263#(<= N (+ 2 k)), 25260#(or (< k N) (< j N)), 25261#(<= N k)] [2022-03-15 21:31:46,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:31:46,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:31:46,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:31:46,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-03-15 21:31:46,120 INFO L87 Difference]: Start difference. First operand 468 states and 1725 transitions. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:46,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:31:46,322 INFO L93 Difference]: Finished difference Result 1052 states and 3725 transitions. [2022-03-15 21:31:46,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 21:31:46,322 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 21:31:46,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:31:46,326 INFO L225 Difference]: With dead ends: 1052 [2022-03-15 21:31:46,326 INFO L226 Difference]: Without dead ends: 1045 [2022-03-15 21:31:46,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 117 SyntacticMatches, 12 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2022-03-15 21:31:46,327 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 216 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:31:46,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 66 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:31:46,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2022-03-15 21:31:46,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 642. [2022-03-15 21:31:46,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 3.995319812792512) internal successors, (2561), 641 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:46,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 2561 transitions. [2022-03-15 21:31:46,339 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 2561 transitions. Word has length 26 [2022-03-15 21:31:46,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:31:46,340 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 2561 transitions. [2022-03-15 21:31:46,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:46,340 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 2561 transitions. [2022-03-15 21:31:46,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:31:46,341 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:31:46,341 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:31:46,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-15 21:31:46,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:46,556 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 21:31:46,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:31:46,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1656498735, now seen corresponding path program 14 times [2022-03-15 21:31:46,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:31:46,557 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313392170] [2022-03-15 21:31:46,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:31:46,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:31:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:46,667 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-15 21:31:46,667 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:31:46,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313392170] [2022-03-15 21:31:46,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313392170] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:31:46,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232118880] [2022-03-15 21:31:46,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:31:46,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:46,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:31:46,669 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:31:46,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 21:31:46,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:31:46,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:31:46,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:31:46,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:31:46,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2022-03-15 21:31:46,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:31:46,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-03-15 21:31:46,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:31:46,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-03-15 21:31:46,853 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:31:46,854 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 35 treesize of output 33 [2022-03-15 21:31:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-15 21:31:46,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:31:55,476 INFO L353 Elim1Store]: treesize reduction 5, result has 89.8 percent of original size [2022-03-15 21:31:55,477 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 16294 treesize of output 15555 [2022-03-15 21:31:55,643 WARN L325 FreeRefinementEngine]: Global settings require throwing the following exception [2022-03-15 21:31:55,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-15 21:31:55,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:55,852 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.ArithmeticException: BigInteger out of long range at java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.computeDerApplicabilityScore(QuantifierPusher.java:685) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.selectBestEliminatee(QuantifierPusher.java:668) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.doit(QuantifierPusher.java:604) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:446) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:261) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:247) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:145) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:93) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-03-15 21:31:55,853 INFO L158 Benchmark]: Toolchain (without parser) took 65574.52ms. Allocated memory was 200.3MB in the beginning and 513.8MB in the end (delta: 313.5MB). Free memory was 165.0MB in the beginning and 327.7MB in the end (delta: -162.7MB). Peak memory consumption was 313.0MB. Max. memory is 8.0GB. [2022-03-15 21:31:55,853 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.09ms. Allocated memory is still 200.3MB. Free memory was 166.3MB in the beginning and 166.2MB in the end (delta: 84.7kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 21:31:55,853 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.35ms. Allocated memory is still 200.3MB. Free memory was 165.0MB in the beginning and 163.5MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-03-15 21:31:55,854 INFO L158 Benchmark]: Boogie Preprocessor took 16.12ms. Allocated memory is still 200.3MB. Free memory was 163.4MB in the beginning and 162.5MB in the end (delta: 948.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 21:31:55,854 INFO L158 Benchmark]: RCFGBuilder took 179.02ms. Allocated memory is still 200.3MB. Free memory was 162.4MB in the beginning and 152.5MB in the end (delta: 9.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-15 21:31:55,854 INFO L158 Benchmark]: TraceAbstraction took 65356.20ms. Allocated memory was 200.3MB in the beginning and 513.8MB in the end (delta: 313.5MB). Free memory was 152.0MB in the beginning and 327.7MB in the end (delta: -175.7MB). Peak memory consumption was 298.3MB. Max. memory is 8.0GB. [2022-03-15 21:31:55,855 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 200.3MB. Free memory was 166.3MB in the beginning and 166.2MB in the end (delta: 84.7kB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 19.35ms. Allocated memory is still 200.3MB. Free memory was 165.0MB in the beginning and 163.5MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 16.12ms. Allocated memory is still 200.3MB. Free memory was 163.4MB in the beginning and 162.5MB in the end (delta: 948.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 179.02ms. Allocated memory is still 200.3MB. Free memory was 162.4MB in the beginning and 152.5MB in the end (delta: 9.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 65356.20ms. Allocated memory was 200.3MB in the beginning and 513.8MB in the end (delta: 313.5MB). Free memory was 152.0MB in the beginning and 327.7MB in the end (delta: -175.7MB). Peak memory consumption was 298.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.3s, 45 PlacesBefore, 36 PlacesAfterwards, 35 TransitionsBefore, 26 TransitionsAfterwards, 340 CoEnabledTransitionPairs, 2 FixpointIterations, 3 TrivialSequentialCompositions, 7 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 10 TotalNumberOfCompositions, 413 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 358, positive: 343, positive conditional: 0, positive unconditional: 343, negative: 15, negative conditional: 0, negative unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 166, positive: 156, positive conditional: 0, positive unconditional: 156, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 358, positive: 187, positive conditional: 0, positive unconditional: 187, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 166, unknown conditional: 0, unknown unconditional: 166] , Statistics on independence cache: Total cache size (in pairs): 59, Positive cache size: 54, Positive conditional cache size: 0, Positive unconditional cache size: 54, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5 - ExceptionOrErrorResult: ArithmeticException: BigInteger out of long range de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: ArithmeticException: BigInteger out of long range: java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-03-15 21:31:55,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...