/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/two-queue.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 21:45:05,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 21:45:05,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 21:45:05,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-15 21:45:05,661 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-15 21:45:05,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-15 21:45:05,663 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-15 21:45:05,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-15 21:45:05,665 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-15 21:45:05,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-15 21:45:05,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-15 21:45:05,667 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-03-15 21:45:05,687 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 21:45:05,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 21:45:05,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 21:45:05,704 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 21:45:05,717 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 21:45:05,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 21:45:05,718 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 21:45:05,718 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 21:45:05,718 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 21:45:05,718 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 21:45:05,718 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 21:45:05,719 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 21:45:05,719 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 21:45:05,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 21:45:05,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 21:45:05,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 21:45:05,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 21:45:05,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 21:45:05,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 21:45:05,719 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 21:45:05,719 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 21:45:05,719 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 21:45:05,719 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 21:45:05,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 21:45:05,720 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 21:45:05,720 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 21:45:05,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 21:45:05,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 21:45:05,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 21:45:05,720 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-15 21:45:05,720 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 21:45:05,720 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 21:45:05,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 21:45:05,720 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2022-03-15 21:45:05,720 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2022-03-15 21:45:05,721 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 21:45:05,721 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 21:45:05,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 21:45:05,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 21:45:05,946 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 21:45:05,947 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 21:45:05,948 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 21:45:05,949 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/two-queue.wvr.bpl [2022-03-15 21:45:05,949 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/two-queue.wvr.bpl' [2022-03-15 21:45:05,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 21:45:05,970 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 21:45:05,971 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 21:45:05,971 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 21:45:05,971 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 21:45:05,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:45:05" (1/1) ... [2022-03-15 21:45:05,985 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:45:05" (1/1) ... [2022-03-15 21:45:05,990 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 21:45:05,991 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 21:45:05,992 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 21:45:05,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 21:45:05,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 21:45:05,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:45:05" (1/1) ... [2022-03-15 21:45:05,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:45:05" (1/1) ... [2022-03-15 21:45:05,998 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:45:05" (1/1) ... [2022-03-15 21:45:05,998 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:45:05" (1/1) ... [2022-03-15 21:45:06,000 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:45:05" (1/1) ... [2022-03-15 21:45:06,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:45:05" (1/1) ... [2022-03-15 21:45:06,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:45:05" (1/1) ... [2022-03-15 21:45:06,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 21:45:06,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 21:45:06,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 21:45:06,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 21:45:06,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:45:05" (1/1) ... [2022-03-15 21:45:06,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 21:45:06,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:45:06,026 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 21:45:06,054 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 21:45:06,071 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 21:45:06,071 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 21:45:06,071 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 21:45:06,072 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 21:45:06,072 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 21:45:06,072 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 21:45:06,072 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 21:45:06,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 21:45:06,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 21:45:06,073 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 21:45:06,107 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 21:45:06,108 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 21:45:06,177 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 21:45:06,192 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 21:45:06,192 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 21:45:06,194 INFO L202 PluginConnector]: Adding new model two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 09:45:06 BoogieIcfgContainer [2022-03-15 21:45:06,194 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 21:45:06,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 21:45:06,196 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 21:45:06,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 21:45:06,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:45:05" (1/2) ... [2022-03-15 21:45:06,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75aa9b4f and model type two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 09:45:06, skipping insertion in model container [2022-03-15 21:45:06,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 09:45:06" (2/2) ... [2022-03-15 21:45:06,203 INFO L111 eAbstractionObserver]: Analyzing ICFG two-queue.wvr.bpl [2022-03-15 21:45:06,207 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 21:45:06,207 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-15 21:45:06,207 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 21:45:06,207 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 21:45:06,255 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 21:45:06,297 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 21:45:06,304 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 21:45:06,305 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 21:45:06,315 INFO L126 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-03-15 21:45:06,325 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 28 places, 23 transitions, 62 flow [2022-03-15 21:45:06,328 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 28 places, 23 transitions, 62 flow [2022-03-15 21:45:06,329 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 28 places, 23 transitions, 62 flow [2022-03-15 21:45:06,351 INFO L129 PetriNetUnfolder]: 2/21 cut-off events. [2022-03-15 21:45:06,351 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-03-15 21:45:06,355 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 21 events. 2/21 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2022-03-15 21:45:06,358 INFO L116 LiptonReduction]: Number of co-enabled transitions 96 [2022-03-15 21:45:06,576 INFO L131 LiptonReduction]: Checked pairs total: 118 [2022-03-15 21:45:06,576 INFO L133 LiptonReduction]: Total number of compositions: 9 [2022-03-15 21:45:06,581 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2022-03-15 21:45:06,592 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:06,593 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:06,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-03-15 21:45:06,598 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:45:06,598 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:45:06,598 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:45:06,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:45:06,602 INFO L85 PathProgramCache]: Analyzing trace with hash 282651639, now seen corresponding path program 1 times [2022-03-15 21:45:06,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:45:06,626 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411727253] [2022-03-15 21:45:06,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:45:06,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:45:06,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:06,724 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 21:45:06,725 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:45:06,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411727253] [2022-03-15 21:45:06,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411727253] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:45:06,725 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:45:06,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-03-15 21:45:06,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [465009807] [2022-03-15 21:45:06,727 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:45:06,730 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:45:06,766 INFO L252 McrAutomatonBuilder]: Finished intersection with 12 states and 14 transitions. [2022-03-15 21:45:06,766 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:45:06,831 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:45:06,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 21:45:06,833 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:45:06,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 21:45:06,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 21:45:06,848 INFO L87 Difference]: Start difference. First operand has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states 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 21:45:06,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:45:06,870 INFO L93 Difference]: Finished difference Result 35 states and 65 transitions. [2022-03-15 21:45:06,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 21:45:06,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-03-15 21:45:06,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:45:06,884 INFO L225 Difference]: With dead ends: 35 [2022-03-15 21:45:06,884 INFO L226 Difference]: Without dead ends: 32 [2022-03-15 21:45:06,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 21:45:06,888 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:45:06,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:45:06,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-15 21:45:06,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2022-03-15 21:45:06,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:06,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 46 transitions. [2022-03-15 21:45:06,911 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 46 transitions. Word has length 8 [2022-03-15 21:45:06,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:45:06,911 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 46 transitions. [2022-03-15 21:45:06,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states 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 21:45:06,912 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 46 transitions. [2022-03-15 21:45:06,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-15 21:45:06,912 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:45:06,912 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:45:06,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 21:45:06,913 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:45:06,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:45:06,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1628937291, now seen corresponding path program 1 times [2022-03-15 21:45:06,914 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:45:06,914 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461421584] [2022-03-15 21:45:06,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:45:06,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:45:06,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:06,944 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 21:45:06,945 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:45:06,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461421584] [2022-03-15 21:45:06,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461421584] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:45:06,945 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:45:06,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 21:45:06,945 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2076041254] [2022-03-15 21:45:06,945 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:45:06,946 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:45:06,949 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 24 transitions. [2022-03-15 21:45:06,949 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:45:07,020 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:45:07,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 21:45:07,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:45:07,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 21:45:07,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 21:45:07,022 INFO L87 Difference]: Start difference. First operand 25 states and 46 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 21:45:07,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:45:07,044 INFO L93 Difference]: Finished difference Result 25 states and 43 transitions. [2022-03-15 21:45:07,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 21:45:07,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-03-15 21:45:07,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:45:07,045 INFO L225 Difference]: With dead ends: 25 [2022-03-15 21:45:07,045 INFO L226 Difference]: Without dead ends: 23 [2022-03-15 21:45:07,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 21:45:07,046 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:45:07,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:45:07,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-15 21:45:07,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-15 21:45:07,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:07,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 40 transitions. [2022-03-15 21:45:07,049 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 40 transitions. Word has length 10 [2022-03-15 21:45:07,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:45:07,050 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 40 transitions. [2022-03-15 21:45:07,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 21:45:07,050 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 40 transitions. [2022-03-15 21:45:07,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-15 21:45:07,050 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:45:07,050 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:45:07,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 21:45:07,051 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:45:07,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:45:07,051 INFO L85 PathProgramCache]: Analyzing trace with hash 930832801, now seen corresponding path program 1 times [2022-03-15 21:45:07,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:45:07,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678127435] [2022-03-15 21:45:07,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:45:07,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:45:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:07,070 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 21:45:07,070 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:45:07,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678127435] [2022-03-15 21:45:07,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678127435] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:45:07,071 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:45:07,071 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 21:45:07,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2131574698] [2022-03-15 21:45:07,071 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:45:07,072 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:45:07,074 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 24 transitions. [2022-03-15 21:45:07,075 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:45:07,179 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:45:07,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 21:45:07,179 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:45:07,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 21:45:07,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 21:45:07,180 INFO L87 Difference]: Start difference. First operand 23 states and 40 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 21:45:07,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:45:07,199 INFO L93 Difference]: Finished difference Result 26 states and 43 transitions. [2022-03-15 21:45:07,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 21:45:07,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-03-15 21:45:07,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:45:07,200 INFO L225 Difference]: With dead ends: 26 [2022-03-15 21:45:07,200 INFO L226 Difference]: Without dead ends: 21 [2022-03-15 21:45:07,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 21:45:07,201 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:45:07,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:45:07,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-15 21:45:07,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-03-15 21:45:07,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states 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 21:45:07,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 35 transitions. [2022-03-15 21:45:07,204 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 35 transitions. Word has length 10 [2022-03-15 21:45:07,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:45:07,205 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 35 transitions. [2022-03-15 21:45:07,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 21:45:07,205 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 35 transitions. [2022-03-15 21:45:07,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 21:45:07,205 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:45:07,205 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:45:07,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-15 21:45:07,206 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:45:07,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:45:07,206 INFO L85 PathProgramCache]: Analyzing trace with hash -421883681, now seen corresponding path program 1 times [2022-03-15 21:45:07,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:45:07,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713205346] [2022-03-15 21:45:07,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:45:07,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:45:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:07,325 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 21:45:07,326 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:45:07,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713205346] [2022-03-15 21:45:07,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713205346] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:45:07,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23807147] [2022-03-15 21:45:07,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:45:07,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:45:07,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:45:07,330 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 21:45:07,331 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 21:45:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:07,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 21:45:07,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:45:07,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-15 21:45:07,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-15 21:45:07,567 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 21:45:07,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:45:07,737 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:45:07,737 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 36 treesize of output 36 [2022-03-15 21:45:07,847 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:45:07,848 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 33 treesize of output 35 [2022-03-15 21:45:07,920 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 21:45:07,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23807147] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:45:07,920 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:45:07,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-03-15 21:45:07,920 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1890865089] [2022-03-15 21:45:07,920 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:45:07,921 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:45:07,923 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2022-03-15 21:45:07,923 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:45:08,249 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [385#(and (or (<= N i) (<= (+ (select q1 q1_front) 1) N) (not (= i (select q2 q2_back)))) (or (<= N i) (not (= i (select q2 q2_back))) (<= (select q2 q2_front) (select q1 q1_front)))), 387#(and (or (<= i j) (< i N)) (or (< j (+ i 1)) (< i N))), 386#(and (or (<= N i) (<= (select q2 q2_front) j) (not (= i (select q2 q2_back)))) (or (<= N i) (= q1_front q1_back) (not (= i (select q2 q2_back)))) (or (<= (+ j 1) N) (<= N i) (not (= i (select q2 q2_back))))), 390#(and (or (< j (+ 2 (select q1 q1_front))) (< (+ (select q1 q1_front) 1) N) (<= q1_back q1_front)) (or (<= (+ (select q1 q1_front) 1) N) (<= (+ (select q1 q1_front) 1) j) (<= q1_back q1_front))), 389#(and (or (< j (+ 2 (select q1 q1_front))) (< (+ (select q1 q1_front) 1) N) (<= q1_back q1_front)) (or (< (+ (select q1 q1_front) 1) N) (<= (+ (select q1 q1_front) 1) j) (<= q1_back q1_front))), 388#(and (or (<= i N) (<= i j)) (or (< j (+ i 1)) (< i N)))] [2022-03-15 21:45:08,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:45:08,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:45:08,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:45:08,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:45:08,250 INFO L87 Difference]: Start difference. First operand 21 states and 35 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states 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 21:45:08,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:45:08,779 INFO L93 Difference]: Finished difference Result 67 states and 121 transitions. [2022-03-15 21:45:08,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 21:45:08,780 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-15 21:45:08,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:45:08,780 INFO L225 Difference]: With dead ends: 67 [2022-03-15 21:45:08,781 INFO L226 Difference]: Without dead ends: 62 [2022-03-15 21:45:08,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:45:08,782 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 50 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:45:08,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 1 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:45:08,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-15 21:45:08,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 32. [2022-03-15 21:45:08,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:08,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 58 transitions. [2022-03-15 21:45:08,786 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 58 transitions. Word has length 12 [2022-03-15 21:45:08,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:45:08,786 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 58 transitions. [2022-03-15 21:45:08,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states 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 21:45:08,786 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 58 transitions. [2022-03-15 21:45:08,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 21:45:08,787 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:45:08,787 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:45:08,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-15 21:45:08,987 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 21:45:08,988 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:45:08,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:45:08,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1825307037, now seen corresponding path program 2 times [2022-03-15 21:45:08,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:45:08,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528064957] [2022-03-15 21:45:08,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:45:08,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:45:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:09,019 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:45:09,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528064957] [2022-03-15 21:45:09,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528064957] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:45:09,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343487889] [2022-03-15 21:45:09,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:45:09,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:45:09,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:45:09,022 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 21:45:09,029 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 21:45:09,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:45:09,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:45:09,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 21:45:09,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:45:09,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:45:09,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-15 21:45:09,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343487889] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:45:09,083 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-15 21:45:09,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-03-15 21:45:09,084 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2118430149] [2022-03-15 21:45:09,084 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:45:09,085 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:45:09,086 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 30 transitions. [2022-03-15 21:45:09,087 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:45:09,128 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:45:09,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 21:45:09,128 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:45:09,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 21:45:09,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 21:45:09,129 INFO L87 Difference]: Start difference. First operand 32 states and 58 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:09,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:45:09,150 INFO L93 Difference]: Finished difference Result 60 states and 107 transitions. [2022-03-15 21:45:09,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 21:45:09,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 21:45:09,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:45:09,151 INFO L225 Difference]: With dead ends: 60 [2022-03-15 21:45:09,151 INFO L226 Difference]: Without dead ends: 57 [2022-03-15 21:45:09,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 21:45:09,151 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 12 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:45:09,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:45:09,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-15 21:45:09,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 40. [2022-03-15 21:45:09,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 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 21:45:09,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2022-03-15 21:45:09,155 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 14 [2022-03-15 21:45:09,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:45:09,155 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2022-03-15 21:45:09,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:09,155 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2022-03-15 21:45:09,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 21:45:09,156 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:45:09,156 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:45:09,175 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 21:45:09,371 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 21:45:09,372 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:45:09,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:45:09,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1706921727, now seen corresponding path program 3 times [2022-03-15 21:45:09,378 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:45:09,379 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066173895] [2022-03-15 21:45:09,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:45:09,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:45:09,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:09,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:09,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:45:09,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066173895] [2022-03-15 21:45:09,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066173895] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:45:09,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208350286] [2022-03-15 21:45:09,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:45:09,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:45:09,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:45:09,407 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 21:45:09,408 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 21:45:09,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 21:45:09,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:45:09,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 21:45:09,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:45:09,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:09,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:45:09,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:09,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208350286] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:45:09,475 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:45:09,475 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2022-03-15 21:45:09,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1721314764] [2022-03-15 21:45:09,475 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:45:09,476 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:45:09,478 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 36 transitions. [2022-03-15 21:45:09,478 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:45:09,556 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:45:09,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 21:45:09,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:45:09,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 21:45:09,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 21:45:09,557 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 21:45:09,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:45:09,590 INFO L93 Difference]: Finished difference Result 76 states and 141 transitions. [2022-03-15 21:45:09,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 21:45:09,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 14 [2022-03-15 21:45:09,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:45:09,591 INFO L225 Difference]: With dead ends: 76 [2022-03-15 21:45:09,591 INFO L226 Difference]: Without dead ends: 70 [2022-03-15 21:45:09,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 21:45:09,591 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 15 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:45:09,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 1 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:45:09,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-15 21:45:09,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2022-03-15 21:45:09,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 55 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 21:45:09,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 114 transitions. [2022-03-15 21:45:09,596 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 114 transitions. Word has length 14 [2022-03-15 21:45:09,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:45:09,596 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 114 transitions. [2022-03-15 21:45:09,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 21:45:09,596 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 114 transitions. [2022-03-15 21:45:09,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:45:09,597 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:45:09,597 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:45:09,621 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 21:45:09,811 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 21:45:09,811 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:45:09,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:45:09,812 INFO L85 PathProgramCache]: Analyzing trace with hash 942393019, now seen corresponding path program 4 times [2022-03-15 21:45:09,813 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:45:09,813 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780329115] [2022-03-15 21:45:09,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:45:09,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:45:09,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:09,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:09,997 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:45:09,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780329115] [2022-03-15 21:45:09,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780329115] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:45:09,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321640344] [2022-03-15 21:45:09,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:45:09,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:45:09,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:45:09,999 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 21:45:10,000 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 21:45:10,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:45:10,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:45:10,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 21:45:10,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:45:10,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-15 21:45:10,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-15 21:45:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:10,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:45:10,323 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:45:10,324 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 37 [2022-03-15 21:45:10,400 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:45:10,400 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 27 treesize of output 27 [2022-03-15 21:45:10,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:10,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321640344] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:45:10,463 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:45:10,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-15 21:45:10,464 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1477250845] [2022-03-15 21:45:10,464 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:45:10,465 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:45:10,469 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 32 transitions. [2022-03-15 21:45:10,469 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:45:10,764 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [1114#(and (or (not (< i N)) (<= q2_back q2_front) (not (= i (select q2 q2_back)))) (or (not (< i N)) (= (+ (* (- 1) q1_front) q1_back) 0) (not (= i (select q2 q2_back)))) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q2_front q2_back))), 1116#(and (or (< j (+ 2 (select q1 q1_front))) (< (+ (select q1 q1_front) 1) N) (<= q1_back q1_front)) (or (< (+ (select q1 q1_front) 1) N) (<= (+ (select q1 q1_front) 1) j) (<= q1_back q1_front))), 1113#(and (or (not (< i N)) (not (= i (select q2 q2_back))) (<= (+ q1_front 1) q1_back)) (or (not (< i N)) (<= q2_back q2_front) (not (= i (select q2 q2_back)))) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q2_front q2_back)) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q1_back (+ q1_front 1)))), 1112#(and (or (<= i j) (< i N)) (or (< j (+ i 1)) (< i N))), 1115#(and (or (<= i N) (<= i j)) (or (< j (+ i 1)) (< i N))), 1117#(and (or (< j (+ 2 (select q1 q1_front))) (< (+ (select q1 q1_front) 1) N) (<= q1_back q1_front)) (or (<= (+ (select q1 q1_front) 1) N) (<= (+ (select q1 q1_front) 1) j) (<= q1_back q1_front)))] [2022-03-15 21:45:10,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:45:10,765 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:45:10,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:45:10,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:45:10,766 INFO L87 Difference]: Start difference. First operand 56 states and 114 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 21:45:12,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:45:12,393 INFO L93 Difference]: Finished difference Result 135 states and 247 transitions. [2022-03-15 21:45:12,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 21:45:12,393 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 21:45:12,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:45:12,394 INFO L225 Difference]: With dead ends: 135 [2022-03-15 21:45:12,394 INFO L226 Difference]: Without dead ends: 118 [2022-03-15 21:45:12,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 11 SyntacticMatches, 13 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=620, Invalid=3802, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 21:45:12,396 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 95 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:45:12,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 1 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:45:12,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-15 21:45:12,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 71. [2022-03-15 21:45:12,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.057142857142857) internal successors, (144), 70 states have internal predecessors, (144), 0 states have call successors, (0), 0 states 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 21:45:12,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 144 transitions. [2022-03-15 21:45:12,402 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 144 transitions. Word has length 16 [2022-03-15 21:45:12,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:45:12,402 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 144 transitions. [2022-03-15 21:45:12,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 21:45:12,402 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 144 transitions. [2022-03-15 21:45:12,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:45:12,403 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:45:12,403 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:45:12,420 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 21:45:12,619 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 21:45:12,619 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:45:12,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:45:12,620 INFO L85 PathProgramCache]: Analyzing trace with hash 76154559, now seen corresponding path program 5 times [2022-03-15 21:45:12,621 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:45:12,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582206547] [2022-03-15 21:45:12,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:45:12,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:45:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:12,865 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:45:12,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582206547] [2022-03-15 21:45:12,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582206547] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:45:12,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501044093] [2022-03-15 21:45:12,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:45:12,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:45:12,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:45:12,867 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 21:45:12,871 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 21:45:12,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 21:45:12,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:45:12,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:45:12,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:45:13,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-15 21:45:13,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-15 21:45:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:13,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:45:13,308 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:45:13,308 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 37 [2022-03-15 21:45:13,362 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:45:13,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-15 21:45:13,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:13,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501044093] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:45:13,557 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:45:13,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-15 21:45:13,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [986476422] [2022-03-15 21:45:13,557 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:45:13,558 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:45:13,561 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 36 transitions. [2022-03-15 21:45:13,561 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:45:14,099 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [1601#(and (or (not (< i N)) (= q1_front q1_back) (not (= i (select q2 q2_back)))) (or (not (< i N)) (<= q2_back q2_front) (not (= i (select q2 q2_back)))) (or (not (< i N)) (<= (select q2 q2_front) j) (not (= i (select q2 q2_back)))) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= j (select q2 q2_front))) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q2_front q2_back))), 1595#(and (or (= (+ q1_front 1) q1_back) (= (select q1 (+ q1_front 1)) j) (not (< q1_front q1_back))) (or (not (= (select q1 (+ q1_front 1)) j)) (<= (+ (select q1 q1_front) 1) j) (= (+ j (* (select q2 q2_front) (- 1))) 0) (not (< q1_front q1_back))) (or (not (= (select q1 (+ q1_front 1)) j)) (= (+ j (* (select q2 q2_front) (- 1))) 0) (not (< q1_front q1_back)) (= q2_back q2_front)) (or (< j (+ 2 (select q1 q1_front))) (not (= (select q1 (+ q1_front 1)) j)) (= (+ j (* (select q2 q2_front) (- 1))) 0) (not (< q1_front q1_back)))), 1596#(and (or (<= i j) (< i N)) (or (< j (+ i 1)) (< i N))), 1600#(and (or (not (< i N)) (not (= i (select q2 q2_back))) (<= (+ q1_front 1) q1_back)) (or (not (< i N)) (<= q2_back q2_front) (not (= i (select q2 q2_back)))) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= (select q2 q2_front) (select q1 q1_front))) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q2_front q2_back)) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q1_back (+ q1_front 1))) (or (<= (select q1 q1_front) (select q2 q2_front)) (not (< i N)) (not (= i (select q2 q2_back))))), 1602#(and (or (not (= (select q1 q1_back) j)) (<= N j) (<= (+ (select q1 q1_front) 1) N)) (or (<= (+ (select q2 q2_front) 1) N) (not (= (select q1 q1_back) j)) (<= N j))), 1599#(and (or (< j (+ 2 (select q1 q1_front))) (< (+ (select q1 q1_front) 1) N) (<= q1_back q1_front)) (or (<= (+ (select q1 q1_front) 1) N) (<= (+ (select q1 q1_front) 1) j) (<= q1_back q1_front))), 1597#(and (or (<= i N) (<= i j)) (or (< j (+ i 1)) (< i N))), 1598#(and (or (< j (+ 2 (select q1 q1_front))) (< (+ (select q1 q1_front) 1) N) (<= q1_back q1_front)) (or (< (+ (select q1 q1_front) 1) N) (<= (+ (select q1 q1_front) 1) j) (<= q1_back q1_front)))] [2022-03-15 21:45:14,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:45:14,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:45:14,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:45:14,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1221, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:45:14,101 INFO L87 Difference]: Start difference. First operand 71 states and 144 transitions. Second operand has 21 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:15,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:45:15,982 INFO L93 Difference]: Finished difference Result 131 states and 231 transitions. [2022-03-15 21:45:15,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 21:45:15,982 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 21:45:15,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:45:15,983 INFO L225 Difference]: With dead ends: 131 [2022-03-15 21:45:15,983 INFO L226 Difference]: Without dead ends: 102 [2022-03-15 21:45:15,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=621, Invalid=3801, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 21:45:15,984 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 118 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:45:15,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 1 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:45:15,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-15 21:45:15,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 72. [2022-03-15 21:45:15,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0) internal successors, (142), 71 states have internal predecessors, (142), 0 states have call successors, (0), 0 states 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 21:45:15,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 142 transitions. [2022-03-15 21:45:15,988 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 142 transitions. Word has length 16 [2022-03-15 21:45:15,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:45:15,989 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 142 transitions. [2022-03-15 21:45:15,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:15,989 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 142 transitions. [2022-03-15 21:45:15,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:45:15,989 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:45:15,989 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:45:16,008 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 21:45:16,202 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 21:45:16,202 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:45:16,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:45:16,203 INFO L85 PathProgramCache]: Analyzing trace with hash -986427717, now seen corresponding path program 6 times [2022-03-15 21:45:16,204 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:45:16,204 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197011239] [2022-03-15 21:45:16,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:45:16,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:45:16,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:16,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:16,436 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:45:16,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197011239] [2022-03-15 21:45:16,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197011239] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:45:16,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447231270] [2022-03-15 21:45:16,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:45:16,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:45:16,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:45:16,438 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 21:45:16,438 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 21:45:16,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 21:45:16,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:45:16,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:45:16,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:45:16,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-15 21:45:16,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-15 21:45:16,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:16,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:45:16,818 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:45:16,818 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 37 [2022-03-15 21:45:16,894 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:45:16,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-03-15 21:45:17,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:17,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447231270] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:45:17,043 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:45:17,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 21:45:17,043 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1283790230] [2022-03-15 21:45:17,043 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:45:17,045 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:45:17,047 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 32 transitions. [2022-03-15 21:45:17,047 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:45:17,410 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [2056#(and (or (<= i j) (< i N)) (or (< j (+ i 1)) (< i N))), 2054#(and (or (not (< i N)) (not (= i (select q2 q2_back))) (<= (+ q1_front 1) q1_back)) (or (not (< i N)) (<= q2_back q2_front) (not (= i (select q2 q2_back)))) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q2_front q2_back)) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q1_back (+ q1_front 1)))), 2058#(and (or (< j (+ 2 (select q1 q1_front))) (< (+ (select q1 q1_front) 1) N) (<= q1_back q1_front)) (or (< (+ (select q1 q1_front) 1) N) (<= (+ (select q1 q1_front) 1) j) (<= q1_back q1_front))), 2059#(and (or (< j (+ 2 (select q1 q1_front))) (< (+ (select q1 q1_front) 1) N) (<= q1_back q1_front)) (or (<= (+ (select q1 q1_front) 1) N) (<= (+ (select q1 q1_front) 1) j) (<= q1_back q1_front))), 2055#(and (or (not (< i N)) (<= q2_back q2_front) (not (= i (select q2 q2_back)))) (or (not (< i N)) (= (+ (* (- 1) q1_front) q1_back) 0) (not (= i (select q2 q2_back)))) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q2_front q2_back))), 2057#(and (or (<= i N) (<= i j)) (or (< j (+ i 1)) (< i N)))] [2022-03-15 21:45:17,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:45:17,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:45:17,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:45:17,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:45:17,411 INFO L87 Difference]: Start difference. First operand 72 states and 142 transitions. Second operand has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 21:45:18,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:45:18,561 INFO L93 Difference]: Finished difference Result 123 states and 225 transitions. [2022-03-15 21:45:18,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 21:45:18,561 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 21:45:18,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:45:18,562 INFO L225 Difference]: With dead ends: 123 [2022-03-15 21:45:18,562 INFO L226 Difference]: Without dead ends: 107 [2022-03-15 21:45:18,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=533, Invalid=3373, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 21:45:18,564 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 56 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:45:18,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 1 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:45:18,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-15 21:45:18,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 72. [2022-03-15 21:45:18,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.943661971830986) internal successors, (138), 71 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 21:45:18,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 138 transitions. [2022-03-15 21:45:18,568 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 138 transitions. Word has length 16 [2022-03-15 21:45:18,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:45:18,568 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 138 transitions. [2022-03-15 21:45:18,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 21:45:18,568 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 138 transitions. [2022-03-15 21:45:18,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:45:18,568 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:45:18,568 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:45:18,584 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 21:45:18,769 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 21:45:18,769 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:45:18,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:45:18,770 INFO L85 PathProgramCache]: Analyzing trace with hash -602038307, now seen corresponding path program 7 times [2022-03-15 21:45:18,771 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:45:18,771 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517030428] [2022-03-15 21:45:18,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:45:18,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:45:18,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:18,833 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:45:18,834 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:45:18,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517030428] [2022-03-15 21:45:18,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517030428] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:45:18,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711655720] [2022-03-15 21:45:18,834 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:45:18,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:45:18,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:45:18,835 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 21:45:18,836 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 21:45:18,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:18,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 21:45:18,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:45:18,882 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:45:18,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:45:18,912 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:45:18,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711655720] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:45:18,913 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:45:18,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-15 21:45:18,915 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1306707832] [2022-03-15 21:45:18,915 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:45:18,917 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:45:18,920 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 40 transitions. [2022-03-15 21:45:18,920 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:45:18,981 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:45:18,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 21:45:18,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:45:18,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 21:45:18,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-15 21:45:18,982 INFO L87 Difference]: Start difference. First operand 72 states and 138 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:19,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:45:19,018 INFO L93 Difference]: Finished difference Result 112 states and 205 transitions. [2022-03-15 21:45:19,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 21:45:19,019 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 21:45:19,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:45:19,019 INFO L225 Difference]: With dead ends: 112 [2022-03-15 21:45:19,019 INFO L226 Difference]: Without dead ends: 106 [2022-03-15 21:45:19,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-15 21:45:19,020 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 31 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:45:19,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 1 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:45:19,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-15 21:45:19,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 74. [2022-03-15 21:45:19,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.9452054794520548) internal successors, (142), 73 states have internal predecessors, (142), 0 states have call successors, (0), 0 states 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 21:45:19,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 142 transitions. [2022-03-15 21:45:19,032 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 142 transitions. Word has length 18 [2022-03-15 21:45:19,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:45:19,033 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 142 transitions. [2022-03-15 21:45:19,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:19,033 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 142 transitions. [2022-03-15 21:45:19,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:45:19,034 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:45:19,034 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:45:19,051 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 21:45:19,243 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 21:45:19,243 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:45:19,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:45:19,243 INFO L85 PathProgramCache]: Analyzing trace with hash 464367737, now seen corresponding path program 8 times [2022-03-15 21:45:19,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:45:19,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530128950] [2022-03-15 21:45:19,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:45:19,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:45:19,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:19,284 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:19,284 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:45:19,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530128950] [2022-03-15 21:45:19,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530128950] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:45:19,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856752680] [2022-03-15 21:45:19,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:45:19,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:45:19,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:45:19,286 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 21:45:19,287 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 21:45:19,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:45:19,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:45:19,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 21:45:19,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:45:19,342 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:45:19,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:45:19,371 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:45:19,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856752680] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:45:19,371 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:45:19,371 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-15 21:45:19,371 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [654282155] [2022-03-15 21:45:19,372 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:45:19,372 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:45:19,376 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 34 transitions. [2022-03-15 21:45:19,376 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:45:19,423 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:45:19,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 21:45:19,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:45:19,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 21:45:19,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-15 21:45:19,425 INFO L87 Difference]: Start difference. First operand 74 states and 142 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 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 21:45:19,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:45:19,445 INFO L93 Difference]: Finished difference Result 57 states and 93 transitions. [2022-03-15 21:45:19,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 21:45:19,445 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 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 21:45:19,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:45:19,447 INFO L225 Difference]: With dead ends: 57 [2022-03-15 21:45:19,447 INFO L226 Difference]: Without dead ends: 54 [2022-03-15 21:45:19,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-15 21:45:19,448 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 18 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:45:19,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 1 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:45:19,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-15 21:45:19,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2022-03-15 21:45:19,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.55) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:19,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 62 transitions. [2022-03-15 21:45:19,457 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 62 transitions. Word has length 18 [2022-03-15 21:45:19,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:45:19,457 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 62 transitions. [2022-03-15 21:45:19,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 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 21:45:19,458 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 62 transitions. [2022-03-15 21:45:19,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:45:19,462 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:45:19,462 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:45:19,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 21:45:19,681 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 21:45:19,682 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:45:19,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:45:19,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1878437527, now seen corresponding path program 9 times [2022-03-15 21:45:19,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:45:19,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769375688] [2022-03-15 21:45:19,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:45:19,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:45:19,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:19,914 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:45:19,914 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:45:19,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769375688] [2022-03-15 21:45:19,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769375688] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:45:19,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595691557] [2022-03-15 21:45:19,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:45:19,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:45:19,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:45:19,916 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 21:45:19,953 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 21:45:19,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:45:19,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:45:19,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:45:19,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:45:20,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:20,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-15 21:45:20,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-03-15 21:45:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:45:20,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:45:20,397 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:45:20,398 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 37 [2022-03-15 21:45:20,490 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:45:20,490 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 27 treesize of output 27 [2022-03-15 21:45:20,724 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:45:20,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595691557] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:45:20,724 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:45:20,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2022-03-15 21:45:20,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1493080491] [2022-03-15 21:45:20,725 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:45:20,726 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:45:20,728 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 36 transitions. [2022-03-15 21:45:20,729 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:45:21,112 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [3147#(and (or (not (< i N)) (<= q2_back q2_front) (not (= i (select q2 q2_back)))) (or (not (< i N)) (= (+ (* (- 1) q1_front) q1_back) 0) (not (= i (select q2 q2_back)))) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q2_front q2_back))), 3150#(and (or (<= i N) (<= i j)) (or (< j (+ i 1)) (< i N))), 3146#(and (or (not (< i N)) (not (= i (select q2 q2_back))) (<= (+ q1_front 1) q1_back)) (or (not (< i N)) (<= q2_back q2_front) (not (= i (select q2 q2_back)))) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q2_front q2_back)) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q1_back (+ q1_front 1)))), 3149#(and (or (< j (+ 2 (select q1 q1_front))) (< (+ (select q1 q1_front) 1) N) (<= q1_back q1_front)) (or (< (+ (select q1 q1_front) 1) N) (<= (+ (select q1 q1_front) 1) j) (<= q1_back q1_front))), 3151#(and (or (< j (+ 2 (select q1 q1_front))) (< (+ (select q1 q1_front) 1) N) (<= q1_back q1_front)) (or (<= (+ (select q1 q1_front) 1) N) (<= (+ (select q1 q1_front) 1) j) (<= q1_back q1_front))), 3148#(and (or (<= i j) (< i N)) (or (< j (+ i 1)) (< i N)))] [2022-03-15 21:45:21,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:45:21,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:45:21,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:45:21,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1235, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:45:21,113 INFO L87 Difference]: Start difference. First operand 41 states and 62 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 21:45:22,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:45:22,439 INFO L93 Difference]: Finished difference Result 116 states and 178 transitions. [2022-03-15 21:45:22,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 21:45:22,439 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 21:45:22,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:45:22,439 INFO L225 Difference]: With dead ends: 116 [2022-03-15 21:45:22,440 INFO L226 Difference]: Without dead ends: 100 [2022-03-15 21:45:22,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=630, Invalid=4062, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 21:45:22,442 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 96 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:45:22,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 1 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:45:22,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-15 21:45:22,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 48. [2022-03-15 21:45:22,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.6595744680851063) internal successors, (78), 47 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 21:45:22,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 78 transitions. [2022-03-15 21:45:22,454 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 78 transitions. Word has length 20 [2022-03-15 21:45:22,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:45:22,454 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 78 transitions. [2022-03-15 21:45:22,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 21:45:22,454 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 78 transitions. [2022-03-15 21:45:22,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:45:22,454 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:45:22,454 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:45:22,470 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 21:45:22,670 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 21:45:22,670 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:45:22,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:45:22,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1012199067, now seen corresponding path program 10 times [2022-03-15 21:45:22,671 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:45:22,671 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377318940] [2022-03-15 21:45:22,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:45:22,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:45:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:22,895 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:45:22,896 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:45:22,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377318940] [2022-03-15 21:45:22,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377318940] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:45:22,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613927198] [2022-03-15 21:45:22,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:45:22,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:45:22,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:45:22,897 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 21:45:22,900 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 21:45:22,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:45:22,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:45:22,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 21:45:22,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:45:23,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-15 21:45:23,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-15 21:45:23,119 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:45:23,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:45:23,259 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:45:23,259 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 37 [2022-03-15 21:45:23,313 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:45:23,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-15 21:45:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:45:23,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613927198] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:45:23,415 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:45:23,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 19 [2022-03-15 21:45:23,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [923367868] [2022-03-15 21:45:23,415 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:45:23,416 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:45:23,419 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 40 transitions. [2022-03-15 21:45:23,419 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:45:23,826 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [3561#(and (or (not (< i N)) (not (= i (select q2 q2_back))) (<= (+ q1_front 1) q1_back)) (or (not (< i N)) (<= q2_back q2_front) (not (= i (select q2 q2_back)))) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q2_front q2_back)) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q1_back (+ q1_front 1)))), 3566#(and (or (< j (+ 2 (select q1 q1_front))) (< (+ (select q1 q1_front) 1) N) (<= q1_back q1_front)) (or (<= (+ (select q1 q1_front) 1) N) (<= (+ (select q1 q1_front) 1) j) (<= q1_back q1_front))), 3567#(and (or (not (= (select q1 q1_back) j)) (<= N j) (<= (+ (select q1 q1_front) 1) N)) (or (<= (+ (select q2 q2_front) 1) N) (not (= (select q1 q1_back) j)) (<= N j))), 3562#(and (or (<= i j) (< i N)) (or (< j (+ i 1)) (< i N))), 3568#(and (or (= (+ q1_front 1) q1_back) (= (select q1 (+ q1_front 1)) j) (not (= (select q2 q2_front) (+ (select q1 q1_front) 1))) (not (< q1_front q1_back))) (or (not (< q1_front q1_back)) (< q2_front (+ q2_back 1))) (or (<= q2_back q2_front) (not (< q1_front q1_back)))), 3564#(and (or (<= i N) (<= i j)) (or (< j (+ i 1)) (< i N))), 3565#(and (or (not (< i N)) (<= q2_back q2_front) (not (= i (select q2 q2_back)))) (or (not (< i N)) (= (+ (* (- 1) q1_front) q1_back) 0) (not (= i (select q2 q2_back)))) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q2_front q2_back))), 3563#(and (or (< j (+ 2 (select q1 q1_front))) (< (+ (select q1 q1_front) 1) N) (<= q1_back q1_front)) (or (< (+ (select q1 q1_front) 1) N) (<= (+ (select q1 q1_front) 1) j) (<= q1_back q1_front)))] [2022-03-15 21:45:23,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:45:23,827 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:45:23,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:45:23,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-03-15 21:45:23,827 INFO L87 Difference]: Start difference. First operand 48 states and 78 transitions. Second operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:25,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:45:25,893 INFO L93 Difference]: Finished difference Result 132 states and 199 transitions. [2022-03-15 21:45:25,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 21:45:25,893 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:45:25,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:45:25,894 INFO L225 Difference]: With dead ends: 132 [2022-03-15 21:45:25,894 INFO L226 Difference]: Without dead ends: 106 [2022-03-15 21:45:25,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 12 SyntacticMatches, 24 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=608, Invalid=4362, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 21:45:25,895 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 116 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:45:25,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 1 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:45:25,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-15 21:45:25,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 48. [2022-03-15 21:45:25,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.574468085106383) internal successors, (74), 47 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 21:45:25,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 74 transitions. [2022-03-15 21:45:25,897 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 74 transitions. Word has length 20 [2022-03-15 21:45:25,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:45:25,897 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 74 transitions. [2022-03-15 21:45:25,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:25,897 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 74 transitions. [2022-03-15 21:45:25,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:45:25,898 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:45:25,898 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:45:25,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 21:45:26,105 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 21:45:26,105 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:45:26,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:45:26,106 INFO L85 PathProgramCache]: Analyzing trace with hash -50383209, now seen corresponding path program 11 times [2022-03-15 21:45:26,106 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:45:26,106 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003719523] [2022-03-15 21:45:26,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:45:26,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:45:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:26,277 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:45:26,277 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:45:26,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003719523] [2022-03-15 21:45:26,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003719523] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:45:26,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610627321] [2022-03-15 21:45:26,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:45:26,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:45:26,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:45:26,279 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 21:45:26,279 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 21:45:26,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 21:45:26,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:45:26,305 WARN L261 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-15 21:45:26,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:45:26,631 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 21:45:26,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 52 [2022-03-15 21:45:26,681 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 21:45:26,681 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 50 treesize of output 26 [2022-03-15 21:45:26,721 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:26,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:45:27,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:27,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:27,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:27,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:27,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:27,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:27,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:27,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:27,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:27,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:45:27,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 136 [2022-03-15 21:45:27,734 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 21:45:27,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 204 treesize of output 206 [2022-03-15 21:45:29,905 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:29,906 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610627321] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:45:29,906 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:45:29,906 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 38 [2022-03-15 21:45:29,906 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [195812617] [2022-03-15 21:45:29,906 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:45:29,907 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:45:29,910 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 36 transitions. [2022-03-15 21:45:29,910 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:45:30,178 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [4040#(and (or (< j (+ 2 (select q1 q1_front))) (< (+ (select q1 q1_front) 1) N) (<= q1_back q1_front)) (or (<= (+ (select q1 q1_front) 1) N) (<= (+ (select q1 q1_front) 1) j) (<= q1_back q1_front))), 4035#(and (or (<= i j) (< i N)) (or (< j (+ i 1)) (< i N))), 4037#(and (or (<= i N) (<= i j)) (or (< j (+ i 1)) (< i N))), 4039#(and (or (not (< i N)) (<= q2_back q2_front) (not (= i (select q2 q2_back)))) (or (not (< i N)) (= (+ (* (- 1) q1_front) q1_back) 0) (not (= i (select q2 q2_back)))) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q2_front q2_back))), 4038#(and (or (not (< i N)) (not (= i (select q2 q2_back))) (<= (+ q1_front 1) q1_back)) (or (not (< i N)) (<= q2_back q2_front) (not (= i (select q2 q2_back)))) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q2_front q2_back)) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q1_back (+ q1_front 1)))), 4036#(and (or (< j (+ 2 (select q1 q1_front))) (< (+ (select q1 q1_front) 1) N) (<= q1_back q1_front)) (or (< (+ (select q1 q1_front) 1) N) (<= (+ (select q1 q1_front) 1) j) (<= q1_back q1_front)))] [2022-03-15 21:45:30,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:45:30,178 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:45:30,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:45:30,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1888, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:45:30,179 INFO L87 Difference]: Start difference. First operand 48 states and 74 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:31,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:45:31,543 INFO L93 Difference]: Finished difference Result 127 states and 195 transitions. [2022-03-15 21:45:31,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 21:45:31,544 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:45:31,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:45:31,545 INFO L225 Difference]: With dead ends: 127 [2022-03-15 21:45:31,545 INFO L226 Difference]: Without dead ends: 109 [2022-03-15 21:45:31,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1345 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=523, Invalid=5329, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 21:45:31,547 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 61 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:45:31,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 1 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:45:31,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-15 21:45:31,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 46. [2022-03-15 21:45:31,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 45 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:31,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 75 transitions. [2022-03-15 21:45:31,560 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 75 transitions. Word has length 20 [2022-03-15 21:45:31,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:45:31,561 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 75 transitions. [2022-03-15 21:45:31,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:31,561 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 75 transitions. [2022-03-15 21:45:31,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:45:31,561 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:45:31,561 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:45:31,578 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 21:45:31,774 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 21:45:31,775 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:45:31,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:45:31,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1250216297, now seen corresponding path program 12 times [2022-03-15 21:45:31,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:45:31,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371525145] [2022-03-15 21:45:31,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:45:31,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:45:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:31,988 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:31,988 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:45:31,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371525145] [2022-03-15 21:45:31,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371525145] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:45:31,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706607953] [2022-03-15 21:45:31,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:45:31,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:45:31,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:45:31,999 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 21:45:32,000 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 21:45:32,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:45:32,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:45:32,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 21:45:32,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:45:32,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-15 21:45:32,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-15 21:45:32,215 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:32,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:45:32,356 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:45:32,356 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 37 [2022-03-15 21:45:32,426 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:45:32,426 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 27 treesize of output 27 [2022-03-15 21:45:32,493 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:32,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706607953] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:45:32,493 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:45:32,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2022-03-15 21:45:32,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1314608677] [2022-03-15 21:45:32,493 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:45:32,494 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:45:32,497 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 36 transitions. [2022-03-15 21:45:32,497 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:45:32,817 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [4461#(and (or (< j (+ 2 (select q1 q1_front))) (< (+ (select q1 q1_front) 1) N) (<= q1_back q1_front)) (or (< (+ (select q1 q1_front) 1) N) (<= (+ (select q1 q1_front) 1) j) (<= q1_back q1_front))), 4462#(and (or (not (< i N)) (not (= i (select q2 q2_back))) (<= (+ q1_front 1) q1_back)) (or (not (< i N)) (<= q2_back q2_front) (not (= i (select q2 q2_back)))) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q2_front q2_back)) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q1_back (+ q1_front 1)))), 4464#(and (or (<= i N) (<= i j)) (or (< j (+ i 1)) (< i N))), 4460#(and (or (<= i j) (< i N)) (or (< j (+ i 1)) (< i N))), 4465#(and (or (< j (+ 2 (select q1 q1_front))) (< (+ (select q1 q1_front) 1) N) (<= q1_back q1_front)) (or (<= (+ (select q1 q1_front) 1) N) (<= (+ (select q1 q1_front) 1) j) (<= q1_back q1_front))), 4463#(and (or (not (< i N)) (<= q2_back q2_front) (not (= i (select q2 q2_back)))) (or (not (< i N)) (= (+ (* (- 1) q1_front) q1_back) 0) (not (= i (select q2 q2_back)))) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q2_front q2_back)))] [2022-03-15 21:45:32,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:45:32,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:45:32,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:45:32,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2022-03-15 21:45:32,818 INFO L87 Difference]: Start difference. First operand 46 states and 75 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:34,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:45:34,083 INFO L93 Difference]: Finished difference Result 178 states and 284 transitions. [2022-03-15 21:45:34,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-15 21:45:34,084 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:45:34,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:45:34,084 INFO L225 Difference]: With dead ends: 178 [2022-03-15 21:45:34,085 INFO L226 Difference]: Without dead ends: 159 [2022-03-15 21:45:34,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 22 SyntacticMatches, 12 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=550, Invalid=4006, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 21:45:34,086 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 98 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:45:34,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 1 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:45:34,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-15 21:45:34,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 73. [2022-03-15 21:45:34,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.6805555555555556) internal successors, (121), 72 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 21:45:34,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 121 transitions. [2022-03-15 21:45:34,088 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 121 transitions. Word has length 20 [2022-03-15 21:45:34,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:45:34,088 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 121 transitions. [2022-03-15 21:45:34,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:34,089 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 121 transitions. [2022-03-15 21:45:34,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:45:34,089 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:45:34,089 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:45:34,105 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 21:45:34,298 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 21:45:34,299 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:45:34,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:45:34,299 INFO L85 PathProgramCache]: Analyzing trace with hash -2116454757, now seen corresponding path program 13 times [2022-03-15 21:45:34,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:45:34,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780873243] [2022-03-15 21:45:34,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:45:34,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:45:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:34,516 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:34,516 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:45:34,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780873243] [2022-03-15 21:45:34,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780873243] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:45:34,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048533879] [2022-03-15 21:45:34,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:45:34,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:45:34,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:45:34,518 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 21:45:34,519 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 21:45:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:34,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 21:45:34,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:45:34,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-15 21:45:34,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-15 21:45:34,698 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:34,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:45:34,794 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:45:34,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-15 21:45:34,823 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:45:34,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-15 21:45:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:34,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048533879] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:45:34,885 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:45:34,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 20 [2022-03-15 21:45:34,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1935845924] [2022-03-15 21:45:34,885 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:45:34,886 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:45:34,889 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 40 transitions. [2022-03-15 21:45:34,889 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:45:35,160 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [5007#(and (or (not (< i N)) (not (= i (select q2 q2_back))) (<= (+ q1_front 1) q1_back)) (or (not (< i N)) (<= q2_back q2_front) (not (= i (select q2 q2_back)))) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q2_front q2_back)) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q1_back (+ q1_front 1)))), 5008#(and (or (< j (+ 2 (select q1 q1_front))) (< (+ (select q1 q1_front) 1) N) (<= q1_back q1_front)) (or (<= (+ (select q1 q1_front) 1) N) (<= (+ (select q1 q1_front) 1) j) (<= q1_back q1_front))), 5005#(and (or (< j (+ 2 (select q1 q1_front))) (< (+ (select q1 q1_front) 1) N) (<= q1_back q1_front)) (or (< (+ (select q1 q1_front) 1) N) (<= (+ (select q1 q1_front) 1) j) (<= q1_back q1_front))), 5004#(and (or (<= i j) (< i N)) (or (< j (+ i 1)) (< i N))), 5009#(and (or (not (= (select q1 q1_back) j)) (<= N j) (<= (+ (select q1 q1_front) 1) N)) (or (<= (+ (select q2 q2_front) 1) N) (not (= (select q1 q1_back) j)) (<= N j))), 5010#(and (or (not (< i N)) (<= q2_back q2_front) (not (= i (select q2 q2_back)))) (or (not (< i N)) (= (+ (* (- 1) q1_front) q1_back) 0) (not (= i (select q2 q2_back)))) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q2_front q2_back))), 5006#(and (or (<= i N) (<= i j)) (or (< j (+ i 1)) (< i N))), 5011#(and (or (= (+ q1_front 1) q1_back) (= (select q1 (+ q1_front 1)) j) (not (= (select q2 q2_front) (+ (select q1 q1_front) 1))) (not (< q1_front q1_back))) (or (not (< q1_front q1_back)) (< q2_front (+ q2_back 1))) (or (<= q2_back q2_front) (not (< q1_front q1_back))))] [2022-03-15 21:45:35,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:45:35,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:45:35,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:45:35,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:45:35,162 INFO L87 Difference]: Start difference. First operand 73 states and 121 transitions. Second operand has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 21:45:36,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:45:36,370 INFO L93 Difference]: Finished difference Result 129 states and 201 transitions. [2022-03-15 21:45:36,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 21:45:36,370 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 21:45:36,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:45:36,371 INFO L225 Difference]: With dead ends: 129 [2022-03-15 21:45:36,371 INFO L226 Difference]: Without dead ends: 120 [2022-03-15 21:45:36,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 14 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=532, Invalid=3628, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:45:36,373 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 124 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:45:36,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 1 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:45:36,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-15 21:45:36,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 73. [2022-03-15 21:45:36,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.6805555555555556) internal successors, (121), 72 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 21:45:36,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 121 transitions. [2022-03-15 21:45:36,382 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 121 transitions. Word has length 20 [2022-03-15 21:45:36,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:45:36,382 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 121 transitions. [2022-03-15 21:45:36,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 21:45:36,382 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 121 transitions. [2022-03-15 21:45:36,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:45:36,382 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:45:36,382 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:45:36,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-15 21:45:36,595 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 21:45:36,595 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:45:36,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:45:36,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1115930263, now seen corresponding path program 14 times [2022-03-15 21:45:36,597 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:45:36,597 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758144556] [2022-03-15 21:45:36,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:45:36,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:45:36,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:36,801 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:45:36,801 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:45:36,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758144556] [2022-03-15 21:45:36,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758144556] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:45:36,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217579562] [2022-03-15 21:45:36,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:45:36,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:45:36,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:45:36,803 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 21:45:36,826 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 21:45:36,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:45:36,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:45:36,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 21:45:36,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:45:36,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-15 21:45:37,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-15 21:45:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:45:37,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:45:37,173 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:45:37,173 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 37 [2022-03-15 21:45:37,238 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:45:37,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-03-15 21:45:37,319 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:45:37,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217579562] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:45:37,319 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:45:37,319 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2022-03-15 21:45:37,319 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1488755717] [2022-03-15 21:45:37,319 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:45:37,321 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:45:37,323 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 36 transitions. [2022-03-15 21:45:37,323 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:45:37,660 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [5499#(and (or (< j (+ 2 (select q1 q1_front))) (< (+ (select q1 q1_front) 1) N) (<= q1_back q1_front)) (or (<= (+ (select q1 q1_front) 1) N) (<= (+ (select q1 q1_front) 1) j) (<= q1_back q1_front))), 5494#(and (or (<= i j) (< i N)) (or (< j (+ i 1)) (< i N))), 5496#(and (or (not (< i N)) (not (= i (select q2 q2_back))) (<= (+ q1_front 1) q1_back)) (or (not (< i N)) (<= q2_back q2_front) (not (= i (select q2 q2_back)))) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q2_front q2_back)) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q1_back (+ q1_front 1)))), 5498#(and (or (<= i N) (<= i j)) (or (< j (+ i 1)) (< i N))), 5495#(and (or (< j (+ 2 (select q1 q1_front))) (< (+ (select q1 q1_front) 1) N) (<= q1_back q1_front)) (or (< (+ (select q1 q1_front) 1) N) (<= (+ (select q1 q1_front) 1) j) (<= q1_back q1_front))), 5497#(and (or (not (< i N)) (<= q2_back q2_front) (not (= i (select q2 q2_back)))) (or (not (< i N)) (= (+ (* (- 1) q1_front) q1_back) 0) (not (= i (select q2 q2_back)))) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q2_front q2_back)))] [2022-03-15 21:45:37,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:45:37,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:45:37,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:45:37,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-03-15 21:45:37,661 INFO L87 Difference]: Start difference. First operand 73 states and 121 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:38,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:45:38,482 INFO L93 Difference]: Finished difference Result 99 states and 157 transitions. [2022-03-15 21:45:38,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 21:45:38,483 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:45:38,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:45:38,483 INFO L225 Difference]: With dead ends: 99 [2022-03-15 21:45:38,483 INFO L226 Difference]: Without dead ends: 90 [2022-03-15 21:45:38,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 11 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=299, Invalid=2053, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:45:38,485 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 53 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:45:38,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 1 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:45:38,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-15 21:45:38,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 67. [2022-03-15 21:45:38,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.621212121212121) internal successors, (107), 66 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 21:45:38,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 107 transitions. [2022-03-15 21:45:38,488 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 107 transitions. Word has length 20 [2022-03-15 21:45:38,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:45:38,488 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 107 transitions. [2022-03-15 21:45:38,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:38,489 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 107 transitions. [2022-03-15 21:45:38,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:45:38,489 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:45:38,489 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:45:38,506 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 21:45:38,705 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 21:45:38,706 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:45:38,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:45:38,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1147744141, now seen corresponding path program 15 times [2022-03-15 21:45:38,707 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:45:38,707 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707341726] [2022-03-15 21:45:38,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:45:38,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:45:38,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:39,034 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:45:39,034 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:45:39,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707341726] [2022-03-15 21:45:39,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707341726] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:45:39,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911799164] [2022-03-15 21:45:39,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:45:39,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:45:39,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:45:39,036 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 21:45:39,037 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 21:45:39,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:45:39,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:45:39,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 21:45:39,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:45:39,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-15 21:45:39,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-03-15 21:45:39,307 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:45:39,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:45:39,467 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:45:39,467 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 37 [2022-03-15 21:45:39,539 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:45:39,539 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 27 treesize of output 27 [2022-03-15 21:45:39,657 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:45:39,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911799164] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:45:39,657 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:45:39,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2022-03-15 21:45:39,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2019807126] [2022-03-15 21:45:39,657 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:45:39,659 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:45:39,663 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 40 transitions. [2022-03-15 21:45:39,663 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:45:39,979 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [5937#(and (or (< j (+ 2 (select q1 q1_front))) (< (+ (select q1 q1_front) 1) N) (<= q1_back q1_front)) (or (< (+ (select q1 q1_front) 1) N) (<= (+ (select q1 q1_front) 1) j) (<= q1_back q1_front))), 5936#(and (or (<= i N) (<= i j)) (or (< j (+ i 1)) (< i N))), 5935#(and (or (<= i j) (< i N)) (or (< j (+ i 1)) (< i N))), 5938#(and (or (not (< i N)) (not (= i (select q2 q2_back))) (<= (+ q1_front 1) q1_back)) (or (not (< i N)) (<= q2_back q2_front) (not (= i (select q2 q2_back)))) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q2_front q2_back)) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q1_back (+ q1_front 1)))), 5940#(and (or (< j (+ 2 (select q1 q1_front))) (< (+ (select q1 q1_front) 1) N) (<= q1_back q1_front)) (or (<= (+ (select q1 q1_front) 1) N) (<= (+ (select q1 q1_front) 1) j) (<= q1_back q1_front))), 5939#(and (or (not (< i N)) (<= q2_back q2_front) (not (= i (select q2 q2_back)))) (or (not (< i N)) (= (+ (* (- 1) q1_front) q1_back) 0) (not (= i (select q2 q2_back)))) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q2_front q2_back)))] [2022-03-15 21:45:39,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:45:39,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:45:39,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:45:39,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:45:39,980 INFO L87 Difference]: Start difference. First operand 67 states and 107 transitions. Second operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:41,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:45:41,264 INFO L93 Difference]: Finished difference Result 154 states and 247 transitions. [2022-03-15 21:45:41,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 21:45:41,264 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:45:41,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:45:41,265 INFO L225 Difference]: With dead ends: 154 [2022-03-15 21:45:41,265 INFO L226 Difference]: Without dead ends: 144 [2022-03-15 21:45:41,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 23 SyntacticMatches, 22 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=433, Invalid=3349, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:45:41,266 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 88 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:45:41,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 1 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:45:41,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-15 21:45:41,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 48. [2022-03-15 21:45:41,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.574468085106383) internal successors, (74), 47 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 21:45:41,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 74 transitions. [2022-03-15 21:45:41,268 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 74 transitions. Word has length 24 [2022-03-15 21:45:41,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:45:41,268 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 74 transitions. [2022-03-15 21:45:41,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:41,268 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 74 transitions. [2022-03-15 21:45:41,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:45:41,268 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:45:41,268 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:45:41,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-15 21:45:41,483 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 21:45:41,483 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:45:41,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:45:41,484 INFO L85 PathProgramCache]: Analyzing trace with hash -2013982601, now seen corresponding path program 16 times [2022-03-15 21:45:41,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:45:41,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534191370] [2022-03-15 21:45:41,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:45:41,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:45:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:41,747 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:45:41,747 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:45:41,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534191370] [2022-03-15 21:45:41,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534191370] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:45:41,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718652349] [2022-03-15 21:45:41,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:45:41,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:45:41,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:45:41,748 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 21:45:41,749 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 21:45:41,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:45:41,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:45:41,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 21:45:41,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:45:41,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-15 21:45:41,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-15 21:45:42,012 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:45:42,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:45:42,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:45:42,157 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 37 [2022-03-15 21:45:42,206 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:45:42,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-15 21:45:42,337 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:45:42,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718652349] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:45:42,337 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:45:42,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 21 [2022-03-15 21:45:42,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2034500426] [2022-03-15 21:45:42,338 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:45:42,339 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:45:42,343 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 44 transitions. [2022-03-15 21:45:42,343 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:45:42,773 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [6416#(and (or (not (< i N)) (not (= i (select q2 q2_back))) (<= (+ q1_front 1) q1_back)) (or (not (< i N)) (<= q2_back q2_front) (not (= i (select q2 q2_back)))) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q2_front q2_back)) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q1_back (+ q1_front 1)))), 6422#(and (or (= (+ q1_front 1) q1_back) (= (select q1 (+ q1_front 1)) j) (not (= (select q2 q2_front) (+ (select q1 q1_front) 1))) (not (< q1_front q1_back))) (or (not (< q1_front q1_back)) (< q2_front (+ q2_back 1))) (or (<= q2_back q2_front) (not (< q1_front q1_back)))), 6417#(and (or (not (< i N)) (<= q2_back q2_front) (not (= i (select q2 q2_back)))) (or (not (< i N)) (= (+ (* (- 1) q1_front) q1_back) 0) (not (= i (select q2 q2_back)))) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q2_front q2_back))), 6420#(and (or (<= i N) (<= i j)) (or (< j (+ i 1)) (< i N))), 6423#(and (or (< j (+ 2 (select q1 q1_front))) (< (+ (select q1 q1_front) 1) N) (<= q1_back q1_front)) (or (<= (+ (select q1 q1_front) 1) N) (<= (+ (select q1 q1_front) 1) j) (<= q1_back q1_front))), 6421#(and (or (< j (+ 2 (select q1 q1_front))) (< (+ (select q1 q1_front) 1) N) (<= q1_back q1_front)) (or (< (+ (select q1 q1_front) 1) N) (<= (+ (select q1 q1_front) 1) j) (<= q1_back q1_front))), 6418#(and (or (not (= (select q1 q1_back) j)) (<= N j) (<= (+ (select q1 q1_front) 1) N)) (or (<= (+ (select q2 q2_front) 1) N) (not (= (select q1 q1_back) j)) (<= N j))), 6419#(and (or (<= i j) (< i N)) (or (< j (+ i 1)) (< i N)))] [2022-03-15 21:45:42,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:45:42,773 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:45:42,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:45:42,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:45:42,774 INFO L87 Difference]: Start difference. First operand 48 states and 74 transitions. Second operand has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:44,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:45:44,375 INFO L93 Difference]: Finished difference Result 101 states and 155 transitions. [2022-03-15 21:45:44,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 21:45:44,375 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:45:44,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:45:44,376 INFO L225 Difference]: With dead ends: 101 [2022-03-15 21:45:44,376 INFO L226 Difference]: Without dead ends: 92 [2022-03-15 21:45:44,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 24 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=485, Invalid=3805, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 21:45:44,377 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 106 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:45:44,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 1 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:45:44,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-15 21:45:44,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 48. [2022-03-15 21:45:44,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.574468085106383) internal successors, (74), 47 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 21:45:44,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 74 transitions. [2022-03-15 21:45:44,379 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 74 transitions. Word has length 24 [2022-03-15 21:45:44,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:45:44,379 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 74 transitions. [2022-03-15 21:45:44,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:44,379 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 74 transitions. [2022-03-15 21:45:44,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:45:44,380 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:45:44,380 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:45:44,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-15 21:45:44,591 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 21:45:44,591 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:45:44,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:45:44,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1218402419, now seen corresponding path program 17 times [2022-03-15 21:45:44,593 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:45:44,593 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566646512] [2022-03-15 21:45:44,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:45:44,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:45:44,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:44,851 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:45:44,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:45:44,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566646512] [2022-03-15 21:45:44,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566646512] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:45:44,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561931791] [2022-03-15 21:45:44,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:45:44,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:45:44,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:45:44,853 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 21:45:44,854 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 21:45:44,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:45:44,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:45:44,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 21:45:44,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:45:45,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-15 21:45:45,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-15 21:45:45,145 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:45:45,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:45:45,291 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:45:45,291 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 37 [2022-03-15 21:45:45,361 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:45:45,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-03-15 21:45:45,482 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:45:45,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561931791] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:45:45,482 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:45:45,482 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2022-03-15 21:45:45,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [580750307] [2022-03-15 21:45:45,483 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:45:45,484 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:45:45,488 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 40 transitions. [2022-03-15 21:45:45,488 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:45:45,765 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [6856#(and (or (<= i N) (<= i j)) (or (< j (+ i 1)) (< i N))), 6857#(and (or (< j (+ 2 (select q1 q1_front))) (< (+ (select q1 q1_front) 1) N) (<= q1_back q1_front)) (or (< (+ (select q1 q1_front) 1) N) (<= (+ (select q1 q1_front) 1) j) (<= q1_back q1_front))), 6858#(and (or (< j (+ 2 (select q1 q1_front))) (< (+ (select q1 q1_front) 1) N) (<= q1_back q1_front)) (or (<= (+ (select q1 q1_front) 1) N) (<= (+ (select q1 q1_front) 1) j) (<= q1_back q1_front))), 6854#(and (or (not (< i N)) (<= q2_back q2_front) (not (= i (select q2 q2_back)))) (or (not (< i N)) (= (+ (* (- 1) q1_front) q1_back) 0) (not (= i (select q2 q2_back)))) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q2_front q2_back))), 6853#(and (or (not (< i N)) (not (= i (select q2 q2_back))) (<= (+ q1_front 1) q1_back)) (or (not (< i N)) (<= q2_back q2_front) (not (= i (select q2 q2_back)))) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q2_front q2_back)) (or (not (< i N)) (not (= i (select q2 q2_back))) (<= q1_back (+ q1_front 1)))), 6855#(and (or (<= i j) (< i N)) (or (< j (+ i 1)) (< i N)))] [2022-03-15 21:45:45,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:45:45,765 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:45:45,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:45:45,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:45:45,767 INFO L87 Difference]: Start difference. First operand 48 states and 74 transitions. Second operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:46,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:45:46,669 INFO L93 Difference]: Finished difference Result 79 states and 121 transitions. [2022-03-15 21:45:46,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 21:45:46,669 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:45:46,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:45:46,669 INFO L225 Difference]: With dead ends: 79 [2022-03-15 21:45:46,669 INFO L226 Difference]: Without dead ends: 0 [2022-03-15 21:45:46,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 21 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=349, Invalid=2731, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:45:46,670 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 45 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:45:46,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 1 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:45:46,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-15 21:45:46,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-15 21:45:46,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states 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 21:45:46,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-15 21:45:46,675 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2022-03-15 21:45:46,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:45:46,675 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-15 21:45:46,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:46,675 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-15 21:45:46,676 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-15 21:45:46,677 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-15 21:45:46,678 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-15 21:45:46,678 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-15 21:45:46,694 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 21:45:46,891 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 21:45:46,893 INFO L732 BasicCegarLoop]: Path program histogram: [17, 1, 1, 1] [2022-03-15 21:45:46,894 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 21:45:46,894 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 21:45:46,896 INFO L202 PluginConnector]: Adding new model two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 09:45:46 BasicIcfg [2022-03-15 21:45:46,896 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 21:45:46,896 INFO L158 Benchmark]: Toolchain (without parser) took 40926.24ms. Allocated memory was 212.9MB in the beginning and 326.1MB in the end (delta: 113.2MB). Free memory was 171.2MB in the beginning and 273.9MB in the end (delta: -102.6MB). Peak memory consumption was 11.9MB. Max. memory is 8.0GB. [2022-03-15 21:45:46,896 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 212.9MB. Free memory is still 172.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 21:45:46,896 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.42ms. Allocated memory is still 212.9MB. Free memory was 171.1MB in the beginning and 169.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 21:45:46,897 INFO L158 Benchmark]: Boogie Preprocessor took 11.20ms. Allocated memory is still 212.9MB. Free memory was 169.6MB in the beginning and 168.7MB in the end (delta: 905.5kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 21:45:46,897 INFO L158 Benchmark]: RCFGBuilder took 190.01ms. Allocated memory is still 212.9MB. Free memory was 168.5MB in the beginning and 159.3MB in the end (delta: 9.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-15 21:45:46,897 INFO L158 Benchmark]: TraceAbstraction took 40700.74ms. Allocated memory was 212.9MB in the beginning and 326.1MB in the end (delta: 113.2MB). Free memory was 158.8MB in the beginning and 273.9MB in the end (delta: -115.1MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 21:45:46,897 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11ms. Allocated memory is still 212.9MB. Free memory is still 172.3MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 20.42ms. Allocated memory is still 212.9MB. Free memory was 171.1MB in the beginning and 169.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 11.20ms. Allocated memory is still 212.9MB. Free memory was 169.6MB in the beginning and 168.7MB in the end (delta: 905.5kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 190.01ms. Allocated memory is still 212.9MB. Free memory was 168.5MB in the beginning and 159.3MB in the end (delta: 9.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 40700.74ms. Allocated memory was 212.9MB in the beginning and 326.1MB in the end (delta: 113.2MB). Free memory was 158.8MB in the beginning and 273.9MB in the end (delta: -115.1MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.2s, 28 PlacesBefore, 20 PlacesAfterwards, 23 TransitionsBefore, 15 TransitionsAfterwards, 96 CoEnabledTransitionPairs, 2 FixpointIterations, 3 TrivialSequentialCompositions, 6 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 9 TotalNumberOfCompositions, 118 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 101, positive: 91, positive conditional: 0, positive unconditional: 91, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 54, positive: 50, positive conditional: 0, positive unconditional: 50, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 101, positive: 41, positive conditional: 0, positive unconditional: 41, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 54, unknown conditional: 0, unknown unconditional: 54] , Statistics on independence cache: Total cache size (in pairs): 12, Positive cache size: 10, Positive conditional cache size: 0, Positive unconditional cache size: 10, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 62]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 36 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 40.6s, OverallIterations: 20, TraceHistogramMax: 4, PathProgramHistogramMax: 17, EmptinessCheckTime: 0.0s, AutomataDifference: 17.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.3s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1186 SdHoareTripleChecker+Valid, 2.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1186 mSDsluCounter, 20 SdHoareTripleChecker+Invalid, 2.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1116 mSDsCounter, 1312 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5443 IncrementalHoareTripleChecker+Invalid, 6755 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1312 mSolverCounterUnsat, 20 mSDtfsCounter, 5443 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1365 GetRequests, 381 SyntacticMatches, 178 SemanticMatches, 806 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11095 ImplicationChecksByTransitivity, 21.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=10, InterpolantAutomatonStates: 514, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 694 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 13.0s InterpolantComputationTime, 660 NumberOfCodeBlocks, 660 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 909 ConstructedInterpolants, 2 QuantifiedInterpolants, 13472 SizeOfPredicates, 133 NumberOfNonLiveVariables, 1325 ConjunctsInSsa, 399 ConjunctsInUnsatCore, 53 InterpolantComputations, 4 PerfectInterpolantSequences, 138/795 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-15 21:45:46,919 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...