/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/figure3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 21:28:53,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 21:28:53,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 21:28:53,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-15 21:28:53,530 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-15 21:28:53,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-15 21:28:53,537 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-15 21:28:53,544 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-15 21:28:53,545 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-15 21:28:53,551 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-15 21:28:53,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-15 21:28:53,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-15 21:28:53,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-15 21:28:53,554 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-15 21:28:53,555 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-15 21:28:53,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-15 21:28:53,557 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-15 21:28:53,558 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-15 21:28:53,561 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-15 21:28:53,562 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-15 21:28:53,563 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-15 21:28:53,567 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-15 21:28:53,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-15 21:28:53,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-15 21:28:53,575 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-15 21:28:53,582 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 21:28:53,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 21:28:53,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 21:28:53,584 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 21:28:53,607 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 21:28:53,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 21:28:53,608 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 21:28:53,608 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 21:28:53,608 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 21:28:53,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 21:28:53,609 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 21:28:53,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 21:28:53,609 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 21:28:53,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 21:28:53,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 21:28:53,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 21:28:53,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 21:28:53,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 21:28:53,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 21:28:53,611 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 21:28:53,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 21:28:53,611 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 21:28:53,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 21:28:53,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 21:28:53,611 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 21:28:53,611 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 21:28:53,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 21:28:53,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 21:28:53,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 21:28:53,612 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-15 21:28:53,612 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 21:28:53,612 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 21:28:53,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 21:28:53,613 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2022-03-15 21:28:53,613 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2022-03-15 21:28:53,613 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 21:28:53,613 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 21:28:53,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 21:28:53,851 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 21:28:53,854 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 21:28:53,855 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 21:28:53,855 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 21:28:53,857 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure3.wvr.bpl [2022-03-15 21:28:53,857 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure3.wvr.bpl' [2022-03-15 21:28:53,884 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 21:28:53,886 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 21:28:53,887 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 21:28:53,887 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 21:28:53,888 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 21:28:53,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:28:53" (1/1) ... [2022-03-15 21:28:53,905 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:28:53" (1/1) ... [2022-03-15 21:28:53,913 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 21:28:53,914 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 21:28:53,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 21:28:53,915 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 21:28:53,915 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 21:28:53,922 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:28:53" (1/1) ... [2022-03-15 21:28:53,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:28:53" (1/1) ... [2022-03-15 21:28:53,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:28:53" (1/1) ... [2022-03-15 21:28:53,923 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:28:53" (1/1) ... [2022-03-15 21:28:53,925 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:28:53" (1/1) ... [2022-03-15 21:28:53,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:28:53" (1/1) ... [2022-03-15 21:28:53,929 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:28:53" (1/1) ... [2022-03-15 21:28:53,930 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 21:28:53,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 21:28:53,932 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 21:28:53,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 21:28:53,934 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:28:53" (1/1) ... [2022-03-15 21:28:53,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 21:28:53,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:53,969 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 21:28:53,991 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 21:28:54,015 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 21:28:54,015 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 21:28:54,015 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 21:28:54,015 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 21:28:54,015 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 21:28:54,016 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 21:28:54,016 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 21:28:54,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 21:28:54,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 21:28:54,017 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 21:28:54,061 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 21:28:54,063 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 21:28:54,129 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 21:28:54,143 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 21:28:54,143 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 21:28:54,145 INFO L202 PluginConnector]: Adding new model figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 09:28:54 BoogieIcfgContainer [2022-03-15 21:28:54,146 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 21:28:54,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 21:28:54,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 21:28:54,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 21:28:54,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:28:53" (1/2) ... [2022-03-15 21:28:54,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@557cb2d2 and model type figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 09:28:54, skipping insertion in model container [2022-03-15 21:28:54,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 09:28:54" (2/2) ... [2022-03-15 21:28:54,153 INFO L111 eAbstractionObserver]: Analyzing ICFG figure3.wvr.bpl [2022-03-15 21:28:54,157 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 21:28:54,157 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-15 21:28:54,158 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 21:28:54,158 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 21:28:54,185 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 21:28:54,223 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 21:28:54,230 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 21:28:54,231 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 21:28:54,240 INFO L126 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-03-15 21:28:54,249 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 28 places, 23 transitions, 62 flow [2022-03-15 21:28:54,252 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 28 places, 23 transitions, 62 flow [2022-03-15 21:28:54,253 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 28 places, 23 transitions, 62 flow [2022-03-15 21:28:54,272 INFO L129 PetriNetUnfolder]: 2/21 cut-off events. [2022-03-15 21:28:54,272 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-03-15 21:28:54,274 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 15 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 12. Up to 2 conditions per place. [2022-03-15 21:28:54,290 INFO L116 LiptonReduction]: Number of co-enabled transitions 48 [2022-03-15 21:28:54,542 INFO L131 LiptonReduction]: Checked pairs total: 43 [2022-03-15 21:28:54,543 INFO L133 LiptonReduction]: Total number of compositions: 11 [2022-03-15 21:28:54,550 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 13 transitions, 42 flow [2022-03-15 21:28:54,576 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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 21:28:54,578 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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 21:28:54,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-03-15 21:28:54,582 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:54,582 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:54,583 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:54,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:54,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1300539512, now seen corresponding path program 1 times [2022-03-15 21:28:54,601 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:54,601 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251354512] [2022-03-15 21:28:54,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:54,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:54,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:54,738 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 21:28:54,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:54,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251354512] [2022-03-15 21:28:54,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251354512] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:28:54,741 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:28:54,741 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-03-15 21:28:54,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1457401405] [2022-03-15 21:28:54,743 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:54,748 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:54,762 INFO L252 McrAutomatonBuilder]: Finished intersection with 12 states and 14 transitions. [2022-03-15 21:28:54,763 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:54,859 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:28:54,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 21:28:54,860 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:54,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 21:28:54,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 21:28:54,879 INFO L87 Difference]: Start difference. First operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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) 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 21:28:54,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:54,900 INFO L93 Difference]: Finished difference Result 21 states and 34 transitions. [2022-03-15 21:28:54,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 21:28:54,902 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 21:28:54,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:54,909 INFO L225 Difference]: With dead ends: 21 [2022-03-15 21:28:54,909 INFO L226 Difference]: Without dead ends: 15 [2022-03-15 21:28:54,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 21:28:54,913 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:54,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:28:54,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-15 21:28:54,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-15 21:28:54,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states 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 21:28:54,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 25 transitions. [2022-03-15 21:28:54,941 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 25 transitions. Word has length 8 [2022-03-15 21:28:54,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:54,941 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 25 transitions. [2022-03-15 21:28:54,941 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 21:28:54,942 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 25 transitions. [2022-03-15 21:28:54,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-15 21:28:54,943 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:54,943 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:54,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 21:28:54,943 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:54,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:54,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1743549630, now seen corresponding path program 1 times [2022-03-15 21:28:54,946 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:54,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658745686] [2022-03-15 21:28:54,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:54,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:54,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:55,025 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:55,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658745686] [2022-03-15 21:28:55,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658745686] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:55,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170494002] [2022-03-15 21:28:55,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:55,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:55,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:55,028 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 21:28:55,033 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 21:28:55,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:55,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 21:28:55,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:55,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:55,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:55,232 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 21:28:55,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170494002] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:55,232 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-15 21:28:55,232 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 7 [2022-03-15 21:28:55,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1881459493] [2022-03-15 21:28:55,234 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:55,234 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:55,237 INFO L252 McrAutomatonBuilder]: Finished intersection with 15 states and 19 transitions. [2022-03-15 21:28:55,237 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:55,327 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [165#(< i1 N1), 166#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:28:55,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 21:28:55,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:55,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 21:28:55,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-15 21:28:55,329 INFO L87 Difference]: Start difference. First operand 15 states and 25 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:55,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:55,428 INFO L93 Difference]: Finished difference Result 30 states and 45 transitions. [2022-03-15 21:28:55,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 21:28:55,429 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-03-15 21:28:55,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:55,432 INFO L225 Difference]: With dead ends: 30 [2022-03-15 21:28:55,432 INFO L226 Difference]: Without dead ends: 30 [2022-03-15 21:28:55,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-03-15 21:28:55,438 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 18 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:55,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 0 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:55,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-15 21:28:55,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 19. [2022-03-15 21:28:55,454 INFO L82 GeneralOperation]: Start removeUnreachable. 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 21:28:55,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 32 transitions. [2022-03-15 21:28:55,458 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 32 transitions. Word has length 9 [2022-03-15 21:28:55,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:55,459 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 32 transitions. [2022-03-15 21:28:55,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:55,460 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 32 transitions. [2022-03-15 21:28:55,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-15 21:28:55,461 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:55,461 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:55,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-15 21:28:55,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:55,676 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:55,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:55,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1760264198, now seen corresponding path program 1 times [2022-03-15 21:28:55,679 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:55,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670761830] [2022-03-15 21:28:55,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:55,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:55,755 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:55,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670761830] [2022-03-15 21:28:55,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670761830] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:55,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920407871] [2022-03-15 21:28:55,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:55,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:55,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:55,760 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 21:28:55,789 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 21:28:55,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:55,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 21:28:55,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:55,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:55,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920407871] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:55,946 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:55,947 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2022-03-15 21:28:55,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1509582251] [2022-03-15 21:28:55,947 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:55,948 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:55,953 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 22 transitions. [2022-03-15 21:28:55,954 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:56,113 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [299#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter)))] [2022-03-15 21:28:56,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 21:28:56,113 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:56,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 21:28:56,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 21:28:56,114 INFO L87 Difference]: Start difference. First operand 19 states and 32 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:56,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:56,154 INFO L93 Difference]: Finished difference Result 39 states and 66 transitions. [2022-03-15 21:28:56,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 21:28:56,155 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-03-15 21:28:56,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:56,157 INFO L225 Difference]: With dead ends: 39 [2022-03-15 21:28:56,157 INFO L226 Difference]: Without dead ends: 31 [2022-03-15 21:28:56,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 21:28:56,158 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:56,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 0 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:28:56,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-15 21:28:56,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2022-03-15 21:28:56,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:56,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 45 transitions. [2022-03-15 21:28:56,167 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 45 transitions. Word has length 10 [2022-03-15 21:28:56,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:56,167 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 45 transitions. [2022-03-15 21:28:56,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:56,168 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 45 transitions. [2022-03-15 21:28:56,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-15 21:28:56,169 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:56,169 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:56,199 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 21:28:56,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-15 21:28:56,384 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:56,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:56,384 INFO L85 PathProgramCache]: Analyzing trace with hash -677033186, now seen corresponding path program 2 times [2022-03-15 21:28:56,386 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:56,386 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541738018] [2022-03-15 21:28:56,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:56,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:56,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:56,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:56,416 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:56,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541738018] [2022-03-15 21:28:56,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541738018] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:28:56,417 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:28:56,417 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 21:28:56,417 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1778260030] [2022-03-15 21:28:56,417 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:56,418 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:56,419 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 24 transitions. [2022-03-15 21:28:56,420 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:56,456 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [393#(< i2 N2)] [2022-03-15 21:28:56,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 21:28:56,456 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:56,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 21:28:56,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 21:28:56,457 INFO L87 Difference]: Start difference. First operand 25 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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 21:28:56,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:56,533 INFO L93 Difference]: Finished difference Result 31 states and 52 transitions. [2022-03-15 21:28:56,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 21:28:56,534 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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 10 [2022-03-15 21:28:56,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:56,536 INFO L225 Difference]: With dead ends: 31 [2022-03-15 21:28:56,536 INFO L226 Difference]: Without dead ends: 30 [2022-03-15 21:28:56,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-15 21:28:56,538 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 13 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:56,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 0 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:28:56,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-15 21:28:56,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2022-03-15 21:28:56,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:56,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2022-03-15 21:28:56,554 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 10 [2022-03-15 21:28:56,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:56,555 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2022-03-15 21:28:56,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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 21:28:56,555 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2022-03-15 21:28:56,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-15 21:28:56,555 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:56,555 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:56,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-15 21:28:56,556 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:56,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:56,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1229303104, now seen corresponding path program 2 times [2022-03-15 21:28:56,559 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:56,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15965800] [2022-03-15 21:28:56,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:56,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:56,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:56,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:56,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15965800] [2022-03-15 21:28:56,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15965800] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:56,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10157226] [2022-03-15 21:28:56,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:28:56,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:56,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:56,635 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 21:28:56,655 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 21:28:56,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:28:56,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:56,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 21:28:56,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:56,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:56,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:56,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10157226] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:56,841 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:56,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2022-03-15 21:28:56,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2088235986] [2022-03-15 21:28:56,841 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:56,842 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:56,844 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 25 transitions. [2022-03-15 21:28:56,844 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:56,943 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [553#(or (<= N2 i2) (<= (+ 2 i2) N2)), 554#(< i1 N1)] [2022-03-15 21:28:56,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:28:56,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:56,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:28:56,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-03-15 21:28:56,944 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 21:28:57,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:57,059 INFO L93 Difference]: Finished difference Result 46 states and 77 transitions. [2022-03-15 21:28:57,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 21:28:57,060 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 11 [2022-03-15 21:28:57,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:57,060 INFO L225 Difference]: With dead ends: 46 [2022-03-15 21:28:57,061 INFO L226 Difference]: Without dead ends: 44 [2022-03-15 21:28:57,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2022-03-15 21:28:57,062 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 28 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:57,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 0 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:57,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-15 21:28:57,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 26. [2022-03-15 21:28:57,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:57,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 49 transitions. [2022-03-15 21:28:57,065 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 49 transitions. Word has length 11 [2022-03-15 21:28:57,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:57,066 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 49 transitions. [2022-03-15 21:28:57,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 21:28:57,066 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 49 transitions. [2022-03-15 21:28:57,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-15 21:28:57,066 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:57,066 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:57,084 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 21:28:57,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:57,276 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:57,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:57,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1150141332, now seen corresponding path program 3 times [2022-03-15 21:28:57,277 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:57,277 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816857430] [2022-03-15 21:28:57,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:57,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:57,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:57,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:57,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816857430] [2022-03-15 21:28:57,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816857430] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:57,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521652328] [2022-03-15 21:28:57,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:28:57,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:57,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:57,324 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 21:28:57,335 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 21:28:57,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 21:28:57,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:57,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 21:28:57,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:57,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:57,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:57,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521652328] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:57,493 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:57,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2022-03-15 21:28:57,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [586135391] [2022-03-15 21:28:57,493 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:57,494 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:57,495 INFO L252 McrAutomatonBuilder]: Finished intersection with 16 states and 19 transitions. [2022-03-15 21:28:57,495 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:57,519 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [733#(< i2 N2)] [2022-03-15 21:28:57,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 21:28:57,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:57,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 21:28:57,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-03-15 21:28:57,521 INFO L87 Difference]: Start difference. First operand 26 states and 49 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 21:28:57,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:57,602 INFO L93 Difference]: Finished difference Result 35 states and 60 transitions. [2022-03-15 21:28:57,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 21:28:57,602 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 11 [2022-03-15 21:28:57,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:57,606 INFO L225 Difference]: With dead ends: 35 [2022-03-15 21:28:57,606 INFO L226 Difference]: Without dead ends: 34 [2022-03-15 21:28:57,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-03-15 21:28:57,607 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:57,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 0 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:28:57,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-15 21:28:57,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2022-03-15 21:28:57,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:57,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 47 transitions. [2022-03-15 21:28:57,610 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 47 transitions. Word has length 11 [2022-03-15 21:28:57,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:57,610 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 47 transitions. [2022-03-15 21:28:57,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 21:28:57,611 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 47 transitions. [2022-03-15 21:28:57,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 21:28:57,611 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:57,611 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:57,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 21:28:57,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:57,815 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:57,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:57,816 INFO L85 PathProgramCache]: Analyzing trace with hash -570581560, now seen corresponding path program 4 times [2022-03-15 21:28:57,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:57,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599507171] [2022-03-15 21:28:57,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:57,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:57,892 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:57,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599507171] [2022-03-15 21:28:57,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599507171] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:57,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504968788] [2022-03-15 21:28:57,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:28:57,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:57,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:57,896 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 21:28:57,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:28:57,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:57,932 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 21:28:57,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 21:28:57,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:57,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:57,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:58,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:58,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504968788] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:58,029 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:58,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-03-15 21:28:58,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1868569761] [2022-03-15 21:28:58,029 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:58,030 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:58,033 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2022-03-15 21:28:58,033 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:58,250 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [896#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 897#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter)))] [2022-03-15 21:28:58,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 21:28:58,251 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:58,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 21:28:58,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-15 21:28:58,251 INFO L87 Difference]: Start difference. First operand 25 states and 47 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 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 21:28:58,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:58,305 INFO L93 Difference]: Finished difference Result 61 states and 112 transitions. [2022-03-15 21:28:58,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 21:28:58,305 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 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 12 [2022-03-15 21:28:58,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:58,306 INFO L225 Difference]: With dead ends: 61 [2022-03-15 21:28:58,306 INFO L226 Difference]: Without dead ends: 51 [2022-03-15 21:28:58,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-15 21:28:58,307 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:58,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:28:58,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-15 21:28:58,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2022-03-15 21:28:58,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 39 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 21:28:58,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 82 transitions. [2022-03-15 21:28:58,311 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 82 transitions. Word has length 12 [2022-03-15 21:28:58,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:58,311 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 82 transitions. [2022-03-15 21:28:58,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 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 21:28:58,311 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 82 transitions. [2022-03-15 21:28:58,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:28:58,312 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:58,312 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:58,337 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 21:28:58,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:58,538 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:58,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:58,538 INFO L85 PathProgramCache]: Analyzing trace with hash 276915330, now seen corresponding path program 5 times [2022-03-15 21:28:58,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:58,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117446571] [2022-03-15 21:28:58,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:58,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:58,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:58,632 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:58,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117446571] [2022-03-15 21:28:58,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117446571] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:58,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531280794] [2022-03-15 21:28:58,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:28:58,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:58,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:58,634 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 21:28:58,639 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 21:28:58,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 21:28:58,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:58,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 21:28:58,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:58,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:58,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:58,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531280794] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:58,908 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:58,908 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2022-03-15 21:28:58,908 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [221248630] [2022-03-15 21:28:58,908 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:58,909 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:58,911 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 33 transitions. [2022-03-15 21:28:58,912 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:59,091 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [1132#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 1133#(< i1 N1), 1131#(or (<= N2 i2) (<= (+ 2 i2) N2))] [2022-03-15 21:28:59,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:28:59,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:59,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:28:59,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:28:59,092 INFO L87 Difference]: Start difference. First operand 40 states and 82 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 21:28:59,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:59,295 INFO L93 Difference]: Finished difference Result 70 states and 127 transitions. [2022-03-15 21:28:59,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:28:59,295 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 13 [2022-03-15 21:28:59,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:59,296 INFO L225 Difference]: With dead ends: 70 [2022-03-15 21:28:59,296 INFO L226 Difference]: Without dead ends: 64 [2022-03-15 21:28:59,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:28:59,297 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 44 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:59,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 0 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:59,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-15 21:28:59,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 33. [2022-03-15 21:28:59,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:59,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 64 transitions. [2022-03-15 21:28:59,300 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 64 transitions. Word has length 13 [2022-03-15 21:28:59,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:59,300 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 64 transitions. [2022-03-15 21:28:59,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 21:28:59,301 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 64 transitions. [2022-03-15 21:28:59,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:28:59,301 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:59,301 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:59,329 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 21:28:59,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:59,504 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:59,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:59,504 INFO L85 PathProgramCache]: Analyzing trace with hash -391915798, now seen corresponding path program 6 times [2022-03-15 21:28:59,505 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:59,505 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156464893] [2022-03-15 21:28:59,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:59,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:59,568 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:59,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156464893] [2022-03-15 21:28:59,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156464893] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:59,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81274004] [2022-03-15 21:28:59,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:28:59,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:59,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:59,570 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 21:28:59,591 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 21:28:59,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 21:28:59,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:59,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 21:28:59,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:59,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:59,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:59,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81274004] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:59,821 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:59,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 16 [2022-03-15 21:28:59,823 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1197962043] [2022-03-15 21:28:59,823 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:59,825 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:59,827 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2022-03-15 21:28:59,827 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:59,865 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1375#(< i2 N2)] [2022-03-15 21:28:59,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 21:28:59,866 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:59,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 21:28:59,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-03-15 21:28:59,868 INFO L87 Difference]: Start difference. First operand 33 states and 64 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:59,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:59,974 INFO L93 Difference]: Finished difference Result 48 states and 86 transitions. [2022-03-15 21:28:59,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:28:59,975 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 21:28:59,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:59,975 INFO L225 Difference]: With dead ends: 48 [2022-03-15 21:28:59,975 INFO L226 Difference]: Without dead ends: 47 [2022-03-15 21:28:59,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2022-03-15 21:28:59,976 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 21 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:59,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 0 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:28:59,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-15 21:28:59,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 31. [2022-03-15 21:28:59,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:59,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 60 transitions. [2022-03-15 21:28:59,980 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 60 transitions. Word has length 13 [2022-03-15 21:28:59,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:59,980 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 60 transitions. [2022-03-15 21:28:59,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:59,980 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 60 transitions. [2022-03-15 21:28:59,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 21:28:59,981 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:59,981 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:00,000 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 21:29:00,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:00,188 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:00,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:00,188 INFO L85 PathProgramCache]: Analyzing trace with hash -29831482, now seen corresponding path program 7 times [2022-03-15 21:29:00,189 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:00,189 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129690078] [2022-03-15 21:29:00,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:00,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:00,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:00,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:00,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129690078] [2022-03-15 21:29:00,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129690078] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:00,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580680001] [2022-03-15 21:29:00,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:29:00,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:00,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:00,250 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 21:29:00,281 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 21:29:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:00,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:29:00,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:00,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:00,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:00,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580680001] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:00,389 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:00,389 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-03-15 21:29:00,389 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [717464723] [2022-03-15 21:29:00,389 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:00,391 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:00,393 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 38 transitions. [2022-03-15 21:29:00,393 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:00,659 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [1582#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 1584#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 1583#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter)))] [2022-03-15 21:29:00,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:29:00,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:00,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:29:00,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-15 21:29:00,660 INFO L87 Difference]: Start difference. First operand 31 states and 60 transitions. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states 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 21:29:00,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:00,738 INFO L93 Difference]: Finished difference Result 81 states and 151 transitions. [2022-03-15 21:29:00,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 21:29:00,739 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 21:29:00,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:00,739 INFO L225 Difference]: With dead ends: 81 [2022-03-15 21:29:00,739 INFO L226 Difference]: Without dead ends: 69 [2022-03-15 21:29:00,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-15 21:29:00,740 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 30 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:00,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 0 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:00,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-15 21:29:00,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 53. [2022-03-15 21:29:00,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 52 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 21:29:00,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 112 transitions. [2022-03-15 21:29:00,745 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 112 transitions. Word has length 14 [2022-03-15 21:29:00,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:00,745 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 112 transitions. [2022-03-15 21:29:00,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states 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 21:29:00,745 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 112 transitions. [2022-03-15 21:29:00,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:29:00,746 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:00,746 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:00,771 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 21:29:00,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-15 21:29:00,968 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:00,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:00,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1629106432, now seen corresponding path program 8 times [2022-03-15 21:29:00,969 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:00,969 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730054712] [2022-03-15 21:29:00,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:00,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:01,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:01,072 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:01,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730054712] [2022-03-15 21:29:01,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730054712] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:01,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695711682] [2022-03-15 21:29:01,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:29:01,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:01,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:01,074 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 21:29:01,104 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 21:29:01,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:29:01,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:01,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 21:29:01,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:01,262 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:01,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:01,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:01,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695711682] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:01,413 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:01,413 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 25 [2022-03-15 21:29:01,413 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1262861708] [2022-03-15 21:29:01,413 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:01,415 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:01,418 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 41 transitions. [2022-03-15 21:29:01,419 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:01,653 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [1884#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2))), 1882#(or (<= N2 i2) (<= (+ 2 i2) N2)), 1885#(< i1 N1), 1883#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2))] [2022-03-15 21:29:01,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:29:01,654 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:01,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:29:01,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:29:01,656 INFO L87 Difference]: Start difference. First operand 53 states and 112 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 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 21:29:01,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:01,924 INFO L93 Difference]: Finished difference Result 92 states and 171 transitions. [2022-03-15 21:29:01,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:29:01,924 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 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 15 [2022-03-15 21:29:01,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:01,925 INFO L225 Difference]: With dead ends: 92 [2022-03-15 21:29:01,925 INFO L226 Difference]: Without dead ends: 82 [2022-03-15 21:29:01,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=352, Invalid=1288, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:29:01,926 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 60 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:01,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 0 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:01,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-15 21:29:01,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 40. [2022-03-15 21:29:01,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:01,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 79 transitions. [2022-03-15 21:29:01,929 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 79 transitions. Word has length 15 [2022-03-15 21:29:01,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:01,929 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 79 transitions. [2022-03-15 21:29:01,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 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 21:29:01,930 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 79 transitions. [2022-03-15 21:29:01,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:29:01,930 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:01,930 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:01,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:02,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:02,139 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:02,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:02,140 INFO L85 PathProgramCache]: Analyzing trace with hash -808532564, now seen corresponding path program 9 times [2022-03-15 21:29:02,141 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:02,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071121088] [2022-03-15 21:29:02,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:02,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:02,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:02,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:02,213 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:02,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071121088] [2022-03-15 21:29:02,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071121088] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:02,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33682890] [2022-03-15 21:29:02,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:29:02,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:02,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:02,215 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 21:29:02,260 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 21:29:02,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:29:02,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:02,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 21:29:02,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:02,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:02,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:02,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:02,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33682890] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:02,555 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:02,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2022-03-15 21:29:02,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [946508313] [2022-03-15 21:29:02,555 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:02,556 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:02,559 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 27 transitions. [2022-03-15 21:29:02,559 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:02,614 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2186#(< i2 N2)] [2022-03-15 21:29:02,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 21:29:02,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:02,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 21:29:02,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:29:02,615 INFO L87 Difference]: Start difference. First operand 40 states and 79 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:02,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:02,786 INFO L93 Difference]: Finished difference Result 62 states and 114 transitions. [2022-03-15 21:29:02,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 21:29:02,787 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 21:29:02,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:02,787 INFO L225 Difference]: With dead ends: 62 [2022-03-15 21:29:02,787 INFO L226 Difference]: Without dead ends: 61 [2022-03-15 21:29:02,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=717, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:29:02,788 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 24 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:02,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 0 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:02,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-15 21:29:02,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 37. [2022-03-15 21:29:02,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:02,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 73 transitions. [2022-03-15 21:29:02,792 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 73 transitions. Word has length 15 [2022-03-15 21:29:02,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:02,792 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 73 transitions. [2022-03-15 21:29:02,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:02,792 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 73 transitions. [2022-03-15 21:29:02,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:29:02,793 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:02,793 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:02,819 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 21:29:03,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-15 21:29:03,004 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:03,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:03,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1013036040, now seen corresponding path program 10 times [2022-03-15 21:29:03,005 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:03,005 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356051204] [2022-03-15 21:29:03,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:03,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:03,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:03,074 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:03,075 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:03,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356051204] [2022-03-15 21:29:03,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356051204] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:03,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016846953] [2022-03-15 21:29:03,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:29:03,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:03,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:03,076 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 21:29:03,095 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 21:29:03,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:29:03,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:03,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:29:03,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:03,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:03,236 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:03,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016846953] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:03,236 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:03,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-03-15 21:29:03,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [938085502] [2022-03-15 21:29:03,236 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:03,238 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:03,241 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 46 transitions. [2022-03-15 21:29:03,242 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:03,633 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [2440#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 2438#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 2439#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 2441#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter)))] [2022-03-15 21:29:03,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:29:03,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:03,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:29:03,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-03-15 21:29:03,634 INFO L87 Difference]: Start difference. First operand 37 states and 73 transitions. Second operand has 11 states, 10 states have (on average 3.3) internal successors, (33), 10 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 21:29:03,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:03,748 INFO L93 Difference]: Finished difference Result 101 states and 190 transitions. [2022-03-15 21:29:03,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 21:29:03,748 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 10 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 16 [2022-03-15 21:29:03,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:03,749 INFO L225 Difference]: With dead ends: 101 [2022-03-15 21:29:03,749 INFO L226 Difference]: Without dead ends: 87 [2022-03-15 21:29:03,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-03-15 21:29:03,750 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 42 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:03,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 0 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:03,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-15 21:29:03,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 66. [2022-03-15 21:29:03,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.1846153846153844) internal successors, (142), 65 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 21:29:03,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 142 transitions. [2022-03-15 21:29:03,754 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 142 transitions. Word has length 16 [2022-03-15 21:29:03,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:03,754 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 142 transitions. [2022-03-15 21:29:03,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 10 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 21:29:03,755 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 142 transitions. [2022-03-15 21:29:03,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:29:03,755 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:03,755 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:03,781 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 21:29:03,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-15 21:29:03,967 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:03,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:03,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1708101058, now seen corresponding path program 11 times [2022-03-15 21:29:03,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:03,969 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860447280] [2022-03-15 21:29:03,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:03,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:04,130 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:04,130 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:04,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860447280] [2022-03-15 21:29:04,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860447280] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:04,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878038971] [2022-03-15 21:29:04,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:29:04,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:04,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:04,132 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 21:29:04,162 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 21:29:04,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 21:29:04,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:04,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:29:04,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:04,373 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:04,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:04,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878038971] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:04,563 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:04,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 31 [2022-03-15 21:29:04,563 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [626105725] [2022-03-15 21:29:04,563 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:04,564 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:04,568 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 49 transitions. [2022-03-15 21:29:04,569 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:04,834 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [2805#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2))), 2807#(< i1 N1), 2806#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 2803#(or (<= N2 i2) (<= (+ 2 i2) N2)), 2804#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2))] [2022-03-15 21:29:04,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:29:04,835 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:04,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:29:04,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1096, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:29:04,836 INFO L87 Difference]: Start difference. First operand 66 states and 142 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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 21:29:05,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:05,188 INFO L93 Difference]: Finished difference Result 114 states and 215 transitions. [2022-03-15 21:29:05,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:29:05,189 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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 17 [2022-03-15 21:29:05,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:05,189 INFO L225 Difference]: With dead ends: 114 [2022-03-15 21:29:05,189 INFO L226 Difference]: Without dead ends: 100 [2022-03-15 21:29:05,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=537, Invalid=2013, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:29:05,191 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 87 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:05,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 0 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:05,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-15 21:29:05,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 47. [2022-03-15 21:29:05,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 21:29:05,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 94 transitions. [2022-03-15 21:29:05,194 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 94 transitions. Word has length 17 [2022-03-15 21:29:05,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:05,194 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 94 transitions. [2022-03-15 21:29:05,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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 21:29:05,194 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 94 transitions. [2022-03-15 21:29:05,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:29:05,195 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:05,195 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:05,224 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 21:29:05,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-15 21:29:05,415 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:05,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:05,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1455589546, now seen corresponding path program 12 times [2022-03-15 21:29:05,417 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:05,417 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991975230] [2022-03-15 21:29:05,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:05,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:05,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:05,506 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:05,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:05,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991975230] [2022-03-15 21:29:05,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991975230] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:05,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222149767] [2022-03-15 21:29:05,506 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:29:05,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:05,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:05,508 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 21:29:05,509 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 21:29:05,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:29:05,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:05,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:29:05,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:05,713 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:05,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:05,897 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:05,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222149767] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:05,898 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:05,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 26 [2022-03-15 21:29:05,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1317664503] [2022-03-15 21:29:05,898 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:05,899 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:05,902 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 31 transitions. [2022-03-15 21:29:05,902 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:05,979 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3167#(< i2 N2)] [2022-03-15 21:29:05,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:29:05,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:05,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:29:05,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:29:05,980 INFO L87 Difference]: Start difference. First operand 47 states and 94 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states 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 21:29:06,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:06,194 INFO L93 Difference]: Finished difference Result 76 states and 142 transitions. [2022-03-15 21:29:06,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:29:06,194 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 21:29:06,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:06,195 INFO L225 Difference]: With dead ends: 76 [2022-03-15 21:29:06,195 INFO L226 Difference]: Without dead ends: 75 [2022-03-15 21:29:06,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:29:06,196 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 29 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:06,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 0 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:06,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-15 21:29:06,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 43. [2022-03-15 21:29:06,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:06,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 86 transitions. [2022-03-15 21:29:06,199 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 86 transitions. Word has length 17 [2022-03-15 21:29:06,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:06,199 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 86 transitions. [2022-03-15 21:29:06,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states 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 21:29:06,199 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 86 transitions. [2022-03-15 21:29:06,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:29:06,200 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:06,200 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:06,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:06,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-15 21:29:06,411 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:06,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:06,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1387253126, now seen corresponding path program 13 times [2022-03-15 21:29:06,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:06,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299288718] [2022-03-15 21:29:06,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:06,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:06,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:06,507 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:06,508 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:06,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299288718] [2022-03-15 21:29:06,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299288718] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:06,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230719610] [2022-03-15 21:29:06,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:29:06,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:06,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:06,509 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 21:29:06,509 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 21:29:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:06,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 21:29:06,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:06,609 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:06,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:06,684 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:06,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230719610] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:06,684 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:06,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-03-15 21:29:06,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [668365771] [2022-03-15 21:29:06,684 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:06,686 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:06,689 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 54 transitions. [2022-03-15 21:29:06,689 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:07,137 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [3464#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 3465#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 3466#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 3468#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter))), 3467#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter)))] [2022-03-15 21:29:07,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:29:07,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:07,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:29:07,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-03-15 21:29:07,138 INFO L87 Difference]: Start difference. First operand 43 states and 86 transitions. Second operand has 13 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:07,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:07,287 INFO L93 Difference]: Finished difference Result 121 states and 229 transitions. [2022-03-15 21:29:07,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 21:29:07,287 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 21:29:07,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:07,288 INFO L225 Difference]: With dead ends: 121 [2022-03-15 21:29:07,288 INFO L226 Difference]: Without dead ends: 105 [2022-03-15 21:29:07,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-03-15 21:29:07,289 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 53 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:07,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 0 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:07,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-15 21:29:07,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 79. [2022-03-15 21:29:07,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.2051282051282053) internal successors, (172), 78 states have internal predecessors, (172), 0 states have call successors, (0), 0 states 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 21:29:07,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 172 transitions. [2022-03-15 21:29:07,293 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 172 transitions. Word has length 18 [2022-03-15 21:29:07,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:07,293 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 172 transitions. [2022-03-15 21:29:07,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:07,293 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 172 transitions. [2022-03-15 21:29:07,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:29:07,294 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:07,294 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:07,323 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 21:29:07,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:07,511 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:07,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:07,512 INFO L85 PathProgramCache]: Analyzing trace with hash -670162752, now seen corresponding path program 14 times [2022-03-15 21:29:07,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:07,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075038058] [2022-03-15 21:29:07,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:07,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:07,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:07,657 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:07,657 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:07,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075038058] [2022-03-15 21:29:07,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075038058] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:07,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108579502] [2022-03-15 21:29:07,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:29:07,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:07,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:07,659 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 21:29:07,659 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 21:29:07,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:29:07,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:07,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:29:07,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:07,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:08,166 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:08,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108579502] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:08,167 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:08,167 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 37 [2022-03-15 21:29:08,167 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1833237084] [2022-03-15 21:29:08,167 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:08,169 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:08,173 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 57 transitions. [2022-03-15 21:29:08,173 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:08,505 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [3894#(or (<= N2 i2) (<= (+ 2 i2) N2)), 3899#(< i1 N1), 3898#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 3896#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2))), 3895#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 3897#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2))] [2022-03-15 21:29:08,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:29:08,506 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:08,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:29:08,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=1570, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:29:08,507 INFO L87 Difference]: Start difference. First operand 79 states and 172 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:08,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:08,902 INFO L93 Difference]: Finished difference Result 136 states and 259 transitions. [2022-03-15 21:29:08,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 21:29:08,902 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 21:29:08,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:08,903 INFO L225 Difference]: With dead ends: 136 [2022-03-15 21:29:08,903 INFO L226 Difference]: Without dead ends: 118 [2022-03-15 21:29:08,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=761, Invalid=2899, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 21:29:08,905 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 97 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:08,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 0 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:08,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-15 21:29:08,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 54. [2022-03-15 21:29:08,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 21:29:08,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 109 transitions. [2022-03-15 21:29:08,908 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 109 transitions. Word has length 19 [2022-03-15 21:29:08,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:08,908 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 109 transitions. [2022-03-15 21:29:08,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:08,908 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 109 transitions. [2022-03-15 21:29:08,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:29:08,909 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:08,909 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:08,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:09,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-15 21:29:09,123 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:09,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:09,124 INFO L85 PathProgramCache]: Analyzing trace with hash 171417324, now seen corresponding path program 15 times [2022-03-15 21:29:09,125 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:09,125 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970044085] [2022-03-15 21:29:09,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:09,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:09,215 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:09,215 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:09,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970044085] [2022-03-15 21:29:09,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970044085] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:09,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188020273] [2022-03-15 21:29:09,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:29:09,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:09,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:09,217 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 21:29:09,217 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 21:29:09,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:29:09,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:09,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:29:09,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:09,492 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:09,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:09,691 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:09,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188020273] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:09,692 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:09,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 31 [2022-03-15 21:29:09,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [282179059] [2022-03-15 21:29:09,692 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:09,693 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:09,695 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 35 transitions. [2022-03-15 21:29:09,696 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:09,775 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4318#(< i2 N2)] [2022-03-15 21:29:09,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:29:09,775 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:09,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:29:09,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:29:09,776 INFO L87 Difference]: Start difference. First operand 54 states and 109 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states 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 21:29:10,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:10,042 INFO L93 Difference]: Finished difference Result 90 states and 170 transitions. [2022-03-15 21:29:10,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:29:10,042 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 21:29:10,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:10,043 INFO L225 Difference]: With dead ends: 90 [2022-03-15 21:29:10,043 INFO L226 Difference]: Without dead ends: 89 [2022-03-15 21:29:10,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=592, Invalid=1664, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:29:10,044 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 38 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:10,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 0 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:10,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-15 21:29:10,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 49. [2022-03-15 21:29:10,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.0625) internal successors, (99), 48 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:10,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 99 transitions. [2022-03-15 21:29:10,047 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 99 transitions. Word has length 19 [2022-03-15 21:29:10,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:10,047 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 99 transitions. [2022-03-15 21:29:10,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states 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 21:29:10,048 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 99 transitions. [2022-03-15 21:29:10,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:29:10,048 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:10,048 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:10,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:10,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-15 21:29:10,265 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:10,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:10,266 INFO L85 PathProgramCache]: Analyzing trace with hash 675519048, now seen corresponding path program 16 times [2022-03-15 21:29:10,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:10,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817837244] [2022-03-15 21:29:10,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:10,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:10,368 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:10,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817837244] [2022-03-15 21:29:10,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817837244] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:10,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7899246] [2022-03-15 21:29:10,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:29:10,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:10,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:10,370 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 21:29:10,370 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 21:29:10,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:29:10,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:10,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 21:29:10,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:10,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:10,565 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:10,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7899246] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:10,565 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:10,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2022-03-15 21:29:10,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [539915610] [2022-03-15 21:29:10,565 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:10,567 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:10,572 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 62 transitions. [2022-03-15 21:29:10,572 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:11,061 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [4661#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 4664#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter))), 4662#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 4660#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 4663#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter))), 4665#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C))))] [2022-03-15 21:29:11,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:29:11,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:11,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:29:11,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-03-15 21:29:11,063 INFO L87 Difference]: Start difference. First operand 49 states and 99 transitions. Second operand has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:11,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:11,239 INFO L93 Difference]: Finished difference Result 141 states and 268 transitions. [2022-03-15 21:29:11,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 21:29:11,240 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:29:11,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:11,240 INFO L225 Difference]: With dead ends: 141 [2022-03-15 21:29:11,240 INFO L226 Difference]: Without dead ends: 123 [2022-03-15 21:29:11,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-03-15 21:29:11,241 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:11,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:29:11,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-15 21:29:11,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2022-03-15 21:29:11,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.21978021978022) internal successors, (202), 91 states have internal predecessors, (202), 0 states have call successors, (0), 0 states 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 21:29:11,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 202 transitions. [2022-03-15 21:29:11,244 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 202 transitions. Word has length 20 [2022-03-15 21:29:11,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:11,244 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 202 transitions. [2022-03-15 21:29:11,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:11,245 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 202 transitions. [2022-03-15 21:29:11,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:29:11,245 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:11,245 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:11,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-15 21:29:11,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:11,461 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:11,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:11,462 INFO L85 PathProgramCache]: Analyzing trace with hash -816183550, now seen corresponding path program 17 times [2022-03-15 21:29:11,462 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:11,462 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006217217] [2022-03-15 21:29:11,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:11,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:11,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:11,632 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:11,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:11,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006217217] [2022-03-15 21:29:11,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006217217] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:11,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42432993] [2022-03-15 21:29:11,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:29:11,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:11,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:11,639 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:11,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 21:29:11,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:29:11,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:11,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:29:11,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:11,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:12,216 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:12,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42432993] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:12,216 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:12,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 43 [2022-03-15 21:29:12,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1340588273] [2022-03-15 21:29:12,216 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:12,218 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:12,224 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 65 transitions. [2022-03-15 21:29:12,224 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:12,585 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [5161#(< i1 N1), 5158#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 5155#(or (<= N2 i2) (<= (+ 2 i2) N2)), 5156#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 5159#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 5160#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2))), 5157#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2)))] [2022-03-15 21:29:12,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:29:12,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:12,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:29:12,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2129, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:29:12,586 INFO L87 Difference]: Start difference. First operand 92 states and 202 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states 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 21:29:13,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:13,041 INFO L93 Difference]: Finished difference Result 158 states and 303 transitions. [2022-03-15 21:29:13,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:29:13,041 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 21:29:13,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:13,042 INFO L225 Difference]: With dead ends: 158 [2022-03-15 21:29:13,042 INFO L226 Difference]: Without dead ends: 136 [2022-03-15 21:29:13,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1549 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1024, Invalid=3946, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 21:29:13,044 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 125 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:13,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 0 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:29:13,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-03-15 21:29:13,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 61. [2022-03-15 21:29:13,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 21:29:13,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 124 transitions. [2022-03-15 21:29:13,047 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 124 transitions. Word has length 21 [2022-03-15 21:29:13,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:13,047 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 124 transitions. [2022-03-15 21:29:13,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states 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 21:29:13,047 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 124 transitions. [2022-03-15 21:29:13,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:29:13,048 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:13,048 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:13,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-15 21:29:13,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:13,255 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:13,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:13,256 INFO L85 PathProgramCache]: Analyzing trace with hash -417502614, now seen corresponding path program 18 times [2022-03-15 21:29:13,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:13,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780142146] [2022-03-15 21:29:13,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:13,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:13,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:13,348 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:13,349 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:13,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780142146] [2022-03-15 21:29:13,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780142146] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:13,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110629461] [2022-03-15 21:29:13,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:29:13,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:13,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:13,350 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:13,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 21:29:13,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:29:13,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:13,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:29:13,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:13,617 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:13,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:13,859 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:13,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110629461] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:13,867 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:13,867 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 15] total 36 [2022-03-15 21:29:13,867 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [266008815] [2022-03-15 21:29:13,867 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:13,869 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:13,872 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 39 transitions. [2022-03-15 21:29:13,872 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:13,967 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5639#(< i2 N2)] [2022-03-15 21:29:13,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:29:13,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:13,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:29:13,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=1048, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:29:13,968 INFO L87 Difference]: Start difference. First operand 61 states and 124 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states 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 21:29:14,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:14,279 INFO L93 Difference]: Finished difference Result 104 states and 198 transitions. [2022-03-15 21:29:14,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 21:29:14,280 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 21:29:14,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:14,280 INFO L225 Difference]: With dead ends: 104 [2022-03-15 21:29:14,280 INFO L226 Difference]: Without dead ends: 103 [2022-03-15 21:29:14,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=794, Invalid=2286, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:29:14,282 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 39 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:14,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 0 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:14,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-15 21:29:14,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 55. [2022-03-15 21:29:14,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.074074074074074) internal successors, (112), 54 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 21:29:14,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 112 transitions. [2022-03-15 21:29:14,284 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 112 transitions. Word has length 21 [2022-03-15 21:29:14,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:14,285 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 112 transitions. [2022-03-15 21:29:14,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states 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 21:29:14,286 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 112 transitions. [2022-03-15 21:29:14,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:29:14,286 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:14,286 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:14,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:14,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:14,495 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:14,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:14,496 INFO L85 PathProgramCache]: Analyzing trace with hash 443841606, now seen corresponding path program 19 times [2022-03-15 21:29:14,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:14,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476837495] [2022-03-15 21:29:14,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:14,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:14,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:14,599 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:14,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:14,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476837495] [2022-03-15 21:29:14,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476837495] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:14,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423589076] [2022-03-15 21:29:14,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:29:14,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:14,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:14,602 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:14,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 21:29:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:14,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 21:29:14,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:14,722 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:14,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:14,793 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:14,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423589076] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:14,793 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:14,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-03-15 21:29:14,794 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [665766384] [2022-03-15 21:29:14,794 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:14,795 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:14,801 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 70 transitions. [2022-03-15 21:29:14,801 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:15,334 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [6028#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 6029#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter))), 6030#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter))), 6026#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 6027#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 6031#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C)))), 6032#(and (or (<= counter 0) (<= counter (* 7 C))) (or (<= counter (* 6 C)) (<= (* 7 C) counter)))] [2022-03-15 21:29:15,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:29:15,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:15,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:29:15,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2022-03-15 21:29:15,335 INFO L87 Difference]: Start difference. First operand 55 states and 112 transitions. Second operand has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:15,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:15,536 INFO L93 Difference]: Finished difference Result 161 states and 307 transitions. [2022-03-15 21:29:15,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:29:15,536 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 21:29:15,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:15,537 INFO L225 Difference]: With dead ends: 161 [2022-03-15 21:29:15,537 INFO L226 Difference]: Without dead ends: 141 [2022-03-15 21:29:15,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2022-03-15 21:29:15,537 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 70 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:15,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 0 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:29:15,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-15 21:29:15,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 105. [2022-03-15 21:29:15,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.230769230769231) internal successors, (232), 104 states have internal predecessors, (232), 0 states have call successors, (0), 0 states 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 21:29:15,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 232 transitions. [2022-03-15 21:29:15,541 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 232 transitions. Word has length 22 [2022-03-15 21:29:15,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:15,541 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 232 transitions. [2022-03-15 21:29:15,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:15,541 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 232 transitions. [2022-03-15 21:29:15,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:29:15,542 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:15,542 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:15,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:15,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-15 21:29:15,759 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:15,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:15,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1436721792, now seen corresponding path program 20 times [2022-03-15 21:29:15,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:15,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781499648] [2022-03-15 21:29:15,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:15,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:15,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:15,974 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:15,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781499648] [2022-03-15 21:29:15,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781499648] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:15,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119742091] [2022-03-15 21:29:15,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:29:15,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:15,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:15,979 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:15,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 21:29:16,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:29:16,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:16,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:29:16,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:16,326 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:16,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:16,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119742091] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:16,638 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:16,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 49 [2022-03-15 21:29:16,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [894067332] [2022-03-15 21:29:16,638 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:16,640 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:16,654 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 73 transitions. [2022-03-15 21:29:16,654 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:17,137 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [6589#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 6590#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 6593#(< i1 N1), 6587#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 6588#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2))), 6591#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2))), 6592#(or (<= N2 (+ 6 i2)) (<= (+ i2 8) N2)), 6586#(or (<= N2 i2) (<= (+ 2 i2) N2))] [2022-03-15 21:29:17,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:29:17,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:17,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:29:17,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=2773, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:29:17,138 INFO L87 Difference]: Start difference. First operand 105 states and 232 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:17,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:17,724 INFO L93 Difference]: Finished difference Result 180 states and 347 transitions. [2022-03-15 21:29:17,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 21:29:17,724 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 21:29:17,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:17,724 INFO L225 Difference]: With dead ends: 180 [2022-03-15 21:29:17,724 INFO L226 Difference]: Without dead ends: 154 [2022-03-15 21:29:17,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 9 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2053 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1326, Invalid=5154, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 21:29:17,726 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 144 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:17,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 0 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:29:17,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-03-15 21:29:17,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 68. [2022-03-15 21:29:17,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.074626865671642) internal successors, (139), 67 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:17,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 139 transitions. [2022-03-15 21:29:17,729 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 139 transitions. Word has length 23 [2022-03-15 21:29:17,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:17,729 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 139 transitions. [2022-03-15 21:29:17,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:17,730 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 139 transitions. [2022-03-15 21:29:17,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:29:17,730 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:17,730 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:17,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-15 21:29:17,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-15 21:29:17,931 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:17,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:17,932 INFO L85 PathProgramCache]: Analyzing trace with hash 990431276, now seen corresponding path program 21 times [2022-03-15 21:29:17,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:17,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513002481] [2022-03-15 21:29:17,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:17,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:18,063 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:18,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513002481] [2022-03-15 21:29:18,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513002481] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:18,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213875273] [2022-03-15 21:29:18,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:29:18,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:18,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:18,068 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:18,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 21:29:18,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:29:18,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:18,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:29:18,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:18,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:18,752 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:18,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213875273] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:18,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:18,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17, 17] total 41 [2022-03-15 21:29:18,753 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2027104371] [2022-03-15 21:29:18,753 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:18,755 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:18,760 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 43 transitions. [2022-03-15 21:29:18,760 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:18,863 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7130#(< i2 N2)] [2022-03-15 21:29:18,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:29:18,863 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:18,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:29:18,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1353, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:29:18,864 INFO L87 Difference]: Start difference. First operand 68 states and 139 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21:29:19,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:19,188 INFO L93 Difference]: Finished difference Result 118 states and 226 transitions. [2022-03-15 21:29:19,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 21:29:19,188 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 23 [2022-03-15 21:29:19,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:19,189 INFO L225 Difference]: With dead ends: 118 [2022-03-15 21:29:19,189 INFO L226 Difference]: Without dead ends: 117 [2022-03-15 21:29:19,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 21:29:19,190 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 50 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:19,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 0 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:19,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-15 21:29:19,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 61. [2022-03-15 21:29:19,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 60 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 21:29:19,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 125 transitions. [2022-03-15 21:29:19,193 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 125 transitions. Word has length 23 [2022-03-15 21:29:19,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:19,193 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 125 transitions. [2022-03-15 21:29:19,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21:29:19,193 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 125 transitions. [2022-03-15 21:29:19,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:29:19,193 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:19,193 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:19,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-15 21:29:19,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:19,403 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:19,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:19,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1564430472, now seen corresponding path program 22 times [2022-03-15 21:29:19,406 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:19,406 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16549534] [2022-03-15 21:29:19,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:19,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:19,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:19,543 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:19,543 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:19,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16549534] [2022-03-15 21:29:19,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16549534] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:19,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143788066] [2022-03-15 21:29:19,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:29:19,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:19,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:19,548 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:19,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-15 21:29:19,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:29:19,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:19,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 21:29:19,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:19,673 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:19,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:19,748 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:19,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143788066] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:19,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:19,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2022-03-15 21:29:19,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1747560743] [2022-03-15 21:29:19,748 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:19,750 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:19,768 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 78 transitions. [2022-03-15 21:29:19,768 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:20,364 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [7563#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 7565#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter))), 7566#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter))), 7568#(and (or (<= counter 0) (<= counter (* 7 C))) (or (<= counter (* 6 C)) (<= (* 7 C) counter))), 7564#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 7567#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C)))), 7562#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 7569#(and (or (<= counter 0) (<= counter (* C 8))) (or (<= (* C 8) counter) (<= counter (* 7 C))))] [2022-03-15 21:29:20,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:29:20,364 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:20,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:29:20,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2022-03-15 21:29:20,365 INFO L87 Difference]: Start difference. First operand 61 states and 125 transitions. Second operand has 19 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:20,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:20,613 INFO L93 Difference]: Finished difference Result 181 states and 346 transitions. [2022-03-15 21:29:20,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:29:20,613 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:29:20,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:20,614 INFO L225 Difference]: With dead ends: 181 [2022-03-15 21:29:20,614 INFO L226 Difference]: Without dead ends: 159 [2022-03-15 21:29:20,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2022-03-15 21:29:20,615 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 90 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:20,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 0 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:29:20,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-15 21:29:20,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2022-03-15 21:29:20,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.2393162393162394) internal successors, (262), 117 states have internal predecessors, (262), 0 states have call successors, (0), 0 states 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 21:29:20,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 262 transitions. [2022-03-15 21:29:20,618 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 262 transitions. Word has length 24 [2022-03-15 21:29:20,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:20,618 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 262 transitions. [2022-03-15 21:29:20,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:20,619 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 262 transitions. [2022-03-15 21:29:20,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:29:20,619 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:20,619 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:20,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:20,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:20,827 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:20,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:20,828 INFO L85 PathProgramCache]: Analyzing trace with hash -2055417790, now seen corresponding path program 23 times [2022-03-15 21:29:20,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:20,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969609275] [2022-03-15 21:29:20,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:20,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:20,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:21,094 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:21,094 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:21,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969609275] [2022-03-15 21:29:21,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969609275] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:21,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666520354] [2022-03-15 21:29:21,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:29:21,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:21,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:21,096 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:21,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-15 21:29:21,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:29:21,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:21,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 21:29:21,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:21,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:21,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666520354] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:21,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:21,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 55 [2022-03-15 21:29:21,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1271707947] [2022-03-15 21:29:21,950 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:21,953 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:21,961 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 81 transitions. [2022-03-15 21:29:21,962 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:22,464 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [8191#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 8194#(or (<= (+ 9 i2) N2) (<= N2 (+ 7 i2))), 8187#(or (<= N2 i2) (<= (+ 2 i2) N2)), 8190#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 8192#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2))), 8188#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 8189#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2))), 8193#(or (<= N2 (+ 6 i2)) (<= (+ i2 8) N2)), 8195#(< i1 N1)] [2022-03-15 21:29:22,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 21:29:22,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:22,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 21:29:22,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=658, Invalid=3502, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:29:22,466 INFO L87 Difference]: Start difference. First operand 118 states and 262 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 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 21:29:23,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:23,224 INFO L93 Difference]: Finished difference Result 202 states and 391 transitions. [2022-03-15 21:29:23,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 21:29:23,224 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 21:29:23,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:23,224 INFO L225 Difference]: With dead ends: 202 [2022-03-15 21:29:23,225 INFO L226 Difference]: Without dead ends: 172 [2022-03-15 21:29:23,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 23 SyntacticMatches, 10 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2628 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1667, Invalid=6523, Unknown=0, NotChecked=0, Total=8190 [2022-03-15 21:29:23,227 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 152 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:23,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 0 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:29:23,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-03-15 21:29:23,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 75. [2022-03-15 21:29:23,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.081081081081081) internal successors, (154), 74 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 21:29:23,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 154 transitions. [2022-03-15 21:29:23,230 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 154 transitions. Word has length 25 [2022-03-15 21:29:23,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:23,230 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 154 transitions. [2022-03-15 21:29:23,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 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 21:29:23,230 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 154 transitions. [2022-03-15 21:29:23,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:29:23,231 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:23,231 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:23,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:23,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-15 21:29:23,451 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:23,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:23,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1368947754, now seen corresponding path program 24 times [2022-03-15 21:29:23,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:23,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007119120] [2022-03-15 21:29:23,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:23,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:23,580 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:23,580 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:23,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007119120] [2022-03-15 21:29:23,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007119120] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:23,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894560846] [2022-03-15 21:29:23,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:29:23,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:23,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:23,582 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:23,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-15 21:29:23,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 21:29:23,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:23,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 21:29:23,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:23,950 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:23,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:24,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894560846] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:24,358 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:24,358 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19, 19] total 46 [2022-03-15 21:29:24,358 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [137583177] [2022-03-15 21:29:24,358 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:24,360 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:24,365 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 47 transitions. [2022-03-15 21:29:24,365 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:24,472 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8791#(< i2 N2)] [2022-03-15 21:29:24,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:29:24,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:24,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:29:24,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=1697, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:29:24,473 INFO L87 Difference]: Start difference. First operand 75 states and 154 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:24,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:24,867 INFO L93 Difference]: Finished difference Result 132 states and 254 transitions. [2022-03-15 21:29:24,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 21:29:24,867 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 21:29:24,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:24,867 INFO L225 Difference]: With dead ends: 132 [2022-03-15 21:29:24,867 INFO L226 Difference]: Without dead ends: 131 [2022-03-15 21:29:24,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 24 SyntacticMatches, 8 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1587 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1285, Invalid=3827, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 21:29:24,868 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 53 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:24,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 0 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:24,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-15 21:29:24,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 67. [2022-03-15 21:29:24,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.090909090909091) internal successors, (138), 66 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 21:29:24,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 138 transitions. [2022-03-15 21:29:24,871 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 138 transitions. Word has length 25 [2022-03-15 21:29:24,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:24,871 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 138 transitions. [2022-03-15 21:29:24,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:24,871 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 138 transitions. [2022-03-15 21:29:24,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:29:24,872 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:24,872 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:24,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-15 21:29:25,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-15 21:29:25,083 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:25,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:25,084 INFO L85 PathProgramCache]: Analyzing trace with hash 682285830, now seen corresponding path program 25 times [2022-03-15 21:29:25,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:25,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094388618] [2022-03-15 21:29:25,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:25,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:25,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:25,236 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:25,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094388618] [2022-03-15 21:29:25,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094388618] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:25,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279512262] [2022-03-15 21:29:25,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:29:25,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:25,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:25,237 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:25,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-15 21:29:25,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:25,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 21:29:25,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:25,346 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:25,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:25,426 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:25,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279512262] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:25,426 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:25,426 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2022-03-15 21:29:25,426 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1382307714] [2022-03-15 21:29:25,426 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:25,428 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:25,444 INFO L252 McrAutomatonBuilder]: Finished intersection with 57 states and 86 transitions. [2022-03-15 21:29:25,444 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:26,106 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [9274#(and (or (<= counter 0) (<= counter (* 7 C))) (or (<= counter (* 6 C)) (<= (* 7 C) counter))), 9269#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 9276#(and (or (<= (* 9 C) counter) (<= counter (* C 8))) (or (<= counter 0) (<= counter (* 9 C)))), 9270#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 9272#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter))), 9271#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter))), 9268#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 9275#(and (or (<= counter 0) (<= counter (* C 8))) (or (<= (* C 8) counter) (<= counter (* 7 C)))), 9273#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C))))] [2022-03-15 21:29:26,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:29:26,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:26,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:29:26,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:29:26,107 INFO L87 Difference]: Start difference. First operand 67 states and 138 transitions. Second operand has 21 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 21:29:26,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:26,359 INFO L93 Difference]: Finished difference Result 201 states and 385 transitions. [2022-03-15 21:29:26,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 21:29:26,359 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 21:29:26,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:26,360 INFO L225 Difference]: With dead ends: 201 [2022-03-15 21:29:26,360 INFO L226 Difference]: Without dead ends: 177 [2022-03-15 21:29:26,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:29:26,361 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 137 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:26,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 0 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:29:26,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-15 21:29:26,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 131. [2022-03-15 21:29:26,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.246153846153846) internal successors, (292), 130 states have internal predecessors, (292), 0 states have call successors, (0), 0 states 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 21:29:26,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 292 transitions. [2022-03-15 21:29:26,364 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 292 transitions. Word has length 26 [2022-03-15 21:29:26,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:26,364 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 292 transitions. [2022-03-15 21:29:26,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 21:29:26,365 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 292 transitions. [2022-03-15 21:29:26,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:29:26,365 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:26,365 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:26,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-15 21:29:26,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-15 21:29:26,575 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:26,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:26,576 INFO L85 PathProgramCache]: Analyzing trace with hash 931615808, now seen corresponding path program 26 times [2022-03-15 21:29:26,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:26,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216688186] [2022-03-15 21:29:26,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:26,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:26,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:26,888 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:26,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216688186] [2022-03-15 21:29:26,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216688186] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:26,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851027896] [2022-03-15 21:29:26,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:29:26,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:26,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:26,892 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:26,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-15 21:29:26,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:29:26,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:26,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 21:29:26,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:27,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:27,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851027896] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:27,805 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:27,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 61 [2022-03-15 21:29:27,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [158150464] [2022-03-15 21:29:27,805 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:27,807 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:27,818 INFO L252 McrAutomatonBuilder]: Finished intersection with 59 states and 89 transitions. [2022-03-15 21:29:27,818 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:28,397 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [9961#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 9962#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 9960#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2))), 9959#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 9958#(or (<= N2 i2) (<= (+ 2 i2) N2)), 9965#(or (<= (+ 9 i2) N2) (<= N2 (+ 7 i2))), 9966#(or (<= (+ i2 10) N2) (<= N2 (+ i2 8))), 9967#(< i1 N1), 9963#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2))), 9964#(or (<= N2 (+ 6 i2)) (<= (+ i2 8) N2))] [2022-03-15 21:29:28,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 21:29:28,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:28,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 21:29:28,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=796, Invalid=4316, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 21:29:28,399 INFO L87 Difference]: Start difference. First operand 131 states and 292 transitions. Second operand has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:29,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:29,252 INFO L93 Difference]: Finished difference Result 224 states and 435 transitions. [2022-03-15 21:29:29,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 21:29:29,252 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 21:29:29,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:29,253 INFO L225 Difference]: With dead ends: 224 [2022-03-15 21:29:29,253 INFO L226 Difference]: Without dead ends: 190 [2022-03-15 21:29:29,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3274 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2047, Invalid=8053, Unknown=0, NotChecked=0, Total=10100 [2022-03-15 21:29:29,254 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 197 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:29,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 0 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:29:29,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-03-15 21:29:29,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 82. [2022-03-15 21:29:29,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.0864197530864197) internal successors, (169), 81 states have internal predecessors, (169), 0 states have call successors, (0), 0 states 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 21:29:29,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 169 transitions. [2022-03-15 21:29:29,258 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 169 transitions. Word has length 27 [2022-03-15 21:29:29,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:29,258 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 169 transitions. [2022-03-15 21:29:29,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:29,258 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 169 transitions. [2022-03-15 21:29:29,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:29:29,258 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:29,258 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:29,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-15 21:29:29,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-15 21:29:29,472 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:29,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:29,472 INFO L85 PathProgramCache]: Analyzing trace with hash -207732372, now seen corresponding path program 27 times [2022-03-15 21:29:29,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:29,473 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864655328] [2022-03-15 21:29:29,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:29,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:29,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:29,642 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 46 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:29,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:29,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864655328] [2022-03-15 21:29:29,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864655328] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:29,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45316831] [2022-03-15 21:29:29,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:29:29,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:29,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:29,644 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:29,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-15 21:29:29,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-15 21:29:29,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:29,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 21:29:29,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 46 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:30,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:30,492 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:30,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45316831] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:30,492 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:30,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21, 21] total 51 [2022-03-15 21:29:30,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1112596103] [2022-03-15 21:29:30,492 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:30,495 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:30,501 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 51 transitions. [2022-03-15 21:29:30,501 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:30,630 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10622#(< i2 N2)] [2022-03-15 21:29:30,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:29:30,630 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:30,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:29:30,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=676, Invalid=2080, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 21:29:30,631 INFO L87 Difference]: Start difference. First operand 82 states and 169 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 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 21:29:31,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:31,102 INFO L93 Difference]: Finished difference Result 146 states and 282 transitions. [2022-03-15 21:29:31,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 21:29:31,102 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 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 27 [2022-03-15 21:29:31,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:31,103 INFO L225 Difference]: With dead ends: 146 [2022-03-15 21:29:31,103 INFO L226 Difference]: Without dead ends: 145 [2022-03-15 21:29:31,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 25 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1996 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1574, Invalid=4746, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 21:29:31,105 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 76 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:31,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 0 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:31,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-03-15 21:29:31,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 73. [2022-03-15 21:29:31,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0972222222222223) internal successors, (151), 72 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 21:29:31,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 151 transitions. [2022-03-15 21:29:31,107 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 151 transitions. Word has length 27 [2022-03-15 21:29:31,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:31,108 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 151 transitions. [2022-03-15 21:29:31,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 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 21:29:31,108 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 151 transitions. [2022-03-15 21:29:31,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:29:31,108 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:31,108 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:31,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:31,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:31,331 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:31,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:31,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1208953144, now seen corresponding path program 28 times [2022-03-15 21:29:31,331 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:31,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666331878] [2022-03-15 21:29:31,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:31,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:31,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:31,509 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:31,509 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:31,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666331878] [2022-03-15 21:29:31,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666331878] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:31,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423014221] [2022-03-15 21:29:31,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:29:31,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:31,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:31,511 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:31,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-15 21:29:31,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:29:31,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:31,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-15 21:29:31,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:31,633 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:31,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:31,727 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:31,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423014221] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:31,727 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:31,727 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2022-03-15 21:29:31,727 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1169247949] [2022-03-15 21:29:31,727 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:31,730 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:31,739 INFO L252 McrAutomatonBuilder]: Finished intersection with 62 states and 94 transitions. [2022-03-15 21:29:31,739 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:32,523 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [11153#(and (or (<= (* C 10) counter) (<= counter (* 9 C))) (or (<= counter (* C 10)) (<= counter 0))), 11152#(and (or (<= (* 9 C) counter) (<= counter (* C 8))) (or (<= counter 0) (<= counter (* 9 C)))), 11145#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 11150#(and (or (<= counter 0) (<= counter (* 7 C))) (or (<= counter (* 6 C)) (<= (* 7 C) counter))), 11146#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 11147#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter))), 11144#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 11149#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C)))), 11151#(and (or (<= counter 0) (<= counter (* C 8))) (or (<= (* C 8) counter) (<= counter (* 7 C)))), 11148#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter)))] [2022-03-15 21:29:32,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:29:32,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:32,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:29:32,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:29:32,524 INFO L87 Difference]: Start difference. First operand 73 states and 151 transitions. Second operand has 23 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:32,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:32,811 INFO L93 Difference]: Finished difference Result 221 states and 424 transitions. [2022-03-15 21:29:32,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:29:32,811 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 21:29:32,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:32,812 INFO L225 Difference]: With dead ends: 221 [2022-03-15 21:29:32,812 INFO L226 Difference]: Without dead ends: 195 [2022-03-15 21:29:32,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:29:32,813 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 211 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:32,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 0 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:29:32,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-15 21:29:32,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 144. [2022-03-15 21:29:32,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.2517482517482517) internal successors, (322), 143 states have internal predecessors, (322), 0 states have call successors, (0), 0 states 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 21:29:32,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 322 transitions. [2022-03-15 21:29:32,816 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 322 transitions. Word has length 28 [2022-03-15 21:29:32,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:32,816 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 322 transitions. [2022-03-15 21:29:32,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:32,817 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 322 transitions. [2022-03-15 21:29:32,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:29:32,817 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:32,817 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:32,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-15 21:29:33,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:33,031 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:33,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:33,032 INFO L85 PathProgramCache]: Analyzing trace with hash -2121012862, now seen corresponding path program 29 times [2022-03-15 21:29:33,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:33,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727922500] [2022-03-15 21:29:33,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:33,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:33,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:33,321 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:33,321 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:33,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727922500] [2022-03-15 21:29:33,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727922500] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:33,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783798614] [2022-03-15 21:29:33,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:29:33,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:33,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:33,322 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:33,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-15 21:29:33,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 21:29:33,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:33,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 21:29:33,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:33,906 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:33,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:34,434 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:34,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783798614] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:34,434 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:34,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 67 [2022-03-15 21:29:34,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1090044455] [2022-03-15 21:29:34,435 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:34,437 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:34,448 INFO L252 McrAutomatonBuilder]: Finished intersection with 64 states and 97 transitions. [2022-03-15 21:29:34,448 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:35,108 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [11899#(or (<= N2 i2) (<= (+ 2 i2) N2)), 11902#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 11900#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 11903#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 11909#(< i1 N1), 11908#(or (<= (+ i2 11) N2) (<= N2 (+ 9 i2))), 11906#(or (<= (+ 9 i2) N2) (<= N2 (+ 7 i2))), 11904#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2))), 11905#(or (<= N2 (+ 6 i2)) (<= (+ i2 8) N2)), 11907#(or (<= (+ i2 10) N2) (<= N2 (+ i2 8))), 11901#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2)))] [2022-03-15 21:29:35,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 21:29:35,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:35,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 21:29:35,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=947, Invalid=5215, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 21:29:35,110 INFO L87 Difference]: Start difference. First operand 144 states and 322 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 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 21:29:36,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:36,055 INFO L93 Difference]: Finished difference Result 246 states and 479 transitions. [2022-03-15 21:29:36,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 21:29:36,055 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 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) Word has length 29 [2022-03-15 21:29:36,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:36,056 INFO L225 Difference]: With dead ends: 246 [2022-03-15 21:29:36,056 INFO L226 Difference]: Without dead ends: 208 [2022-03-15 21:29:36,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3991 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2466, Invalid=9744, Unknown=0, NotChecked=0, Total=12210 [2022-03-15 21:29:36,058 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 240 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:36,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 0 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:29:36,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-03-15 21:29:36,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 89. [2022-03-15 21:29:36,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.090909090909091) internal successors, (184), 88 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 21:29:36,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 184 transitions. [2022-03-15 21:29:36,061 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 184 transitions. Word has length 29 [2022-03-15 21:29:36,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:36,061 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 184 transitions. [2022-03-15 21:29:36,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 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 21:29:36,061 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 184 transitions. [2022-03-15 21:29:36,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:29:36,062 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:36,062 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:36,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-15 21:29:36,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-03-15 21:29:36,267 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:36,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:36,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1293401578, now seen corresponding path program 30 times [2022-03-15 21:29:36,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:36,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500292674] [2022-03-15 21:29:36,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:36,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:36,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:36,453 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:36,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500292674] [2022-03-15 21:29:36,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500292674] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:36,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234168625] [2022-03-15 21:29:36,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:29:36,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:36,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:36,455 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:36,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-15 21:29:36,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 21:29:36,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:36,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 21:29:36,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:36,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:37,433 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:37,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234168625] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:37,433 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:37,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 23, 23] total 56 [2022-03-15 21:29:37,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [509647246] [2022-03-15 21:29:37,434 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:37,436 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:37,444 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 55 transitions. [2022-03-15 21:29:37,444 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:37,601 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12623#(< i2 N2)] [2022-03-15 21:29:37,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:29:37,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:37,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:29:37,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=2502, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:29:37,602 INFO L87 Difference]: Start difference. First operand 89 states and 184 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:38,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:38,141 INFO L93 Difference]: Finished difference Result 160 states and 310 transitions. [2022-03-15 21:29:38,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 21:29:38,141 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 21:29:38,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:38,142 INFO L225 Difference]: With dead ends: 160 [2022-03-15 21:29:38,142 INFO L226 Difference]: Without dead ends: 159 [2022-03-15 21:29:38,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 26 SyntacticMatches, 10 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2452 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1892, Invalid=5764, Unknown=0, NotChecked=0, Total=7656 [2022-03-15 21:29:38,143 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 83 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:38,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 0 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:38,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-15 21:29:38,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 79. [2022-03-15 21:29:38,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 78 states have internal predecessors, (164), 0 states have call successors, (0), 0 states 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 21:29:38,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 164 transitions. [2022-03-15 21:29:38,146 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 164 transitions. Word has length 29 [2022-03-15 21:29:38,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:38,146 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 164 transitions. [2022-03-15 21:29:38,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:38,146 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 164 transitions. [2022-03-15 21:29:38,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:29:38,146 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:38,146 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:38,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-15 21:29:38,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:38,359 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:38,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:38,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1351161402, now seen corresponding path program 31 times [2022-03-15 21:29:38,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:38,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642480389] [2022-03-15 21:29:38,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:38,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:38,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:38,530 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:38,530 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:38,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642480389] [2022-03-15 21:29:38,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642480389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:38,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386452124] [2022-03-15 21:29:38,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:29:38,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:38,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:38,532 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:38,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-15 21:29:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:38,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 21:29:38,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:38,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:38,757 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:38,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386452124] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:38,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:38,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 12 [2022-03-15 21:29:38,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1387032639] [2022-03-15 21:29:38,757 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:38,760 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:38,772 INFO L252 McrAutomatonBuilder]: Finished intersection with 67 states and 102 transitions. [2022-03-15 21:29:38,772 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:39,653 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [13195#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C)))), 13190#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 13193#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter))), 13194#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter))), 13192#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 13200#(and (or (<= counter (* C 10)) (<= (* C 11) counter)) (or (<= counter 0) (<= counter (* C 11)))), 13198#(and (or (<= (* 9 C) counter) (<= counter (* C 8))) (or (<= counter 0) (<= counter (* 9 C)))), 13191#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 13199#(and (or (<= (* C 10) counter) (<= counter (* 9 C))) (or (<= counter (* C 10)) (<= counter 0))), 13196#(and (or (<= counter 0) (<= counter (* 7 C))) (or (<= counter (* 6 C)) (<= (* 7 C) counter))), 13197#(and (or (<= counter 0) (<= counter (* C 8))) (or (<= (* C 8) counter) (<= counter (* 7 C))))] [2022-03-15 21:29:39,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:29:39,654 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:39,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:29:39,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:29:39,654 INFO L87 Difference]: Start difference. First operand 79 states and 164 transitions. Second operand has 25 states, 24 states have (on average 3.125) internal successors, (75), 24 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 21:29:40,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:40,066 INFO L93 Difference]: Finished difference Result 241 states and 463 transitions. [2022-03-15 21:29:40,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:29:40,066 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.125) internal successors, (75), 24 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 21:29:40,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:40,067 INFO L225 Difference]: With dead ends: 241 [2022-03-15 21:29:40,067 INFO L226 Difference]: Without dead ends: 213 [2022-03-15 21:29:40,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:29:40,067 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 136 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:40,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 0 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:29:40,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-03-15 21:29:40,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 157. [2022-03-15 21:29:40,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.2564102564102564) internal successors, (352), 156 states have internal predecessors, (352), 0 states have call successors, (0), 0 states 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 21:29:40,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 352 transitions. [2022-03-15 21:29:40,072 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 352 transitions. Word has length 30 [2022-03-15 21:29:40,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:40,072 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 352 transitions. [2022-03-15 21:29:40,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.125) internal successors, (75), 24 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 21:29:40,072 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 352 transitions. [2022-03-15 21:29:40,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:29:40,072 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:40,072 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:40,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-15 21:29:40,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:40,285 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:40,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:40,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1667222016, now seen corresponding path program 32 times [2022-03-15 21:29:40,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:40,286 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473509776] [2022-03-15 21:29:40,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:40,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:40,633 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:40,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:40,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473509776] [2022-03-15 21:29:40,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473509776] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:40,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851977833] [2022-03-15 21:29:40,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:29:40,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:40,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:40,634 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:40,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-15 21:29:40,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:29:40,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:40,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 21:29:40,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:41,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:41,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851977833] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:41,868 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:41,868 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 73 [2022-03-15 21:29:41,868 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [143459349] [2022-03-15 21:29:41,868 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:41,871 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:41,883 INFO L252 McrAutomatonBuilder]: Finished intersection with 69 states and 105 transitions. [2022-03-15 21:29:41,883 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:42,641 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 12 new interpolants: [14013#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2))), 14019#(or (<= (+ i2 10) N2) (<= N2 (+ i2 8))), 14010#(< i1 N1), 14014#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 14015#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 14011#(or (<= N2 i2) (<= (+ 2 i2) N2)), 14018#(or (<= (+ 9 i2) N2) (<= N2 (+ 7 i2))), 14020#(or (<= (+ i2 11) N2) (<= N2 (+ 9 i2))), 14012#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 14017#(or (<= N2 (+ 6 i2)) (<= (+ i2 8) N2)), 14016#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2))), 14021#(or (<= N2 (+ i2 10)) (<= (+ i2 12) N2))] [2022-03-15 21:29:42,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-15 21:29:42,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:42,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-15 21:29:42,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1111, Invalid=6199, Unknown=0, NotChecked=0, Total=7310 [2022-03-15 21:29:42,642 INFO L87 Difference]: Start difference. First operand 157 states and 352 transitions. Second operand has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:43,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:43,687 INFO L93 Difference]: Finished difference Result 268 states and 523 transitions. [2022-03-15 21:29:43,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 21:29:43,688 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 21:29:43,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:43,689 INFO L225 Difference]: With dead ends: 268 [2022-03-15 21:29:43,689 INFO L226 Difference]: Without dead ends: 226 [2022-03-15 21:29:43,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 26 SyntacticMatches, 13 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4768 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2924, Invalid=11596, Unknown=0, NotChecked=0, Total=14520 [2022-03-15 21:29:43,691 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 227 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:43,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 0 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:29:43,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-03-15 21:29:43,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 96. [2022-03-15 21:29:43,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.094736842105263) internal successors, (199), 95 states have internal predecessors, (199), 0 states have call successors, (0), 0 states 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 21:29:43,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 199 transitions. [2022-03-15 21:29:43,694 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 199 transitions. Word has length 31 [2022-03-15 21:29:43,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:43,694 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 199 transitions. [2022-03-15 21:29:43,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:43,694 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 199 transitions. [2022-03-15 21:29:43,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:29:43,695 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:43,695 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:43,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-15 21:29:43,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-15 21:29:43,907 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:43,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:43,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1179912876, now seen corresponding path program 33 times [2022-03-15 21:29:43,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:43,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379110955] [2022-03-15 21:29:43,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:43,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:43,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:44,086 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 67 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:44,086 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:44,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379110955] [2022-03-15 21:29:44,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379110955] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:44,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852715545] [2022-03-15 21:29:44,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:29:44,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:44,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:44,088 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:44,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-15 21:29:44,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-15 21:29:44,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:44,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 21:29:44,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:44,632 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 67 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:44,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:45,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852715545] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:45,213 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:45,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25, 25] total 61 [2022-03-15 21:29:45,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [977652659] [2022-03-15 21:29:45,214 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:45,218 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:45,228 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 59 transitions. [2022-03-15 21:29:45,228 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:45,437 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14794#(< i2 N2)] [2022-03-15 21:29:45,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:29:45,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:45,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:29:45,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=943, Invalid=2963, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 21:29:45,438 INFO L87 Difference]: Start difference. First operand 96 states and 199 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 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 21:29:46,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:46,077 INFO L93 Difference]: Finished difference Result 174 states and 338 transitions. [2022-03-15 21:29:46,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 21:29:46,078 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 21:29:46,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:46,078 INFO L225 Difference]: With dead ends: 174 [2022-03-15 21:29:46,078 INFO L226 Difference]: Without dead ends: 173 [2022-03-15 21:29:46,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 27 SyntacticMatches, 11 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2955 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2239, Invalid=6881, Unknown=0, NotChecked=0, Total=9120 [2022-03-15 21:29:46,079 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 98 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:46,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 0 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:46,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-15 21:29:46,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 85. [2022-03-15 21:29:46,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.107142857142857) internal successors, (177), 84 states have internal predecessors, (177), 0 states have call successors, (0), 0 states 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 21:29:46,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 177 transitions. [2022-03-15 21:29:46,082 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 177 transitions. Word has length 31 [2022-03-15 21:29:46,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:46,082 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 177 transitions. [2022-03-15 21:29:46,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 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 21:29:46,083 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 177 transitions. [2022-03-15 21:29:46,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 21:29:46,083 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:46,083 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:46,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-15 21:29:46,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-15 21:29:46,295 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:46,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:46,296 INFO L85 PathProgramCache]: Analyzing trace with hash -168547064, now seen corresponding path program 34 times [2022-03-15 21:29:46,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:46,297 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662359120] [2022-03-15 21:29:46,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:46,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:46,491 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:46,491 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:46,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662359120] [2022-03-15 21:29:46,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662359120] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:46,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462212722] [2022-03-15 21:29:46,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:29:46,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:46,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:46,495 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:46,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-15 21:29:46,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:29:46,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:46,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 21:29:46,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:46,635 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:46,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:46,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462212722] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:46,742 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:46,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 13 [2022-03-15 21:29:46,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [310007917] [2022-03-15 21:29:46,742 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:46,745 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:46,759 INFO L252 McrAutomatonBuilder]: Finished intersection with 72 states and 110 transitions. [2022-03-15 21:29:46,759 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:47,712 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 12 new interpolants: [15417#(and (or (<= counter (* C 11)) (<= (* C 12) counter)) (or (<= counter (* C 12)) (<= counter 0))), 15415#(and (or (<= (* C 10) counter) (<= counter (* 9 C))) (or (<= counter (* C 10)) (<= counter 0))), 15413#(and (or (<= counter 0) (<= counter (* C 8))) (or (<= (* C 8) counter) (<= counter (* 7 C)))), 15407#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 15406#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 15409#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter))), 15408#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 15412#(and (or (<= counter 0) (<= counter (* 7 C))) (or (<= counter (* 6 C)) (<= (* 7 C) counter))), 15410#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter))), 15414#(and (or (<= (* 9 C) counter) (<= counter (* C 8))) (or (<= counter 0) (<= counter (* 9 C)))), 15411#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C)))), 15416#(and (or (<= counter (* C 10)) (<= (* C 11) counter)) (or (<= counter 0) (<= counter (* C 11))))] [2022-03-15 21:29:47,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:29:47,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:47,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:29:47,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:29:47,713 INFO L87 Difference]: Start difference. First operand 85 states and 177 transitions. Second operand has 27 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:48,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:48,155 INFO L93 Difference]: Finished difference Result 261 states and 502 transitions. [2022-03-15 21:29:48,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 21:29:48,155 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 21:29:48,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:48,156 INFO L225 Difference]: With dead ends: 261 [2022-03-15 21:29:48,156 INFO L226 Difference]: Without dead ends: 231 [2022-03-15 21:29:48,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:29:48,156 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 235 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:48,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 0 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:29:48,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-03-15 21:29:48,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 170. [2022-03-15 21:29:48,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.260355029585799) internal successors, (382), 169 states have internal predecessors, (382), 0 states have call successors, (0), 0 states 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 21:29:48,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 382 transitions. [2022-03-15 21:29:48,160 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 382 transitions. Word has length 32 [2022-03-15 21:29:48,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:48,160 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 382 transitions. [2022-03-15 21:29:48,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:48,160 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 382 transitions. [2022-03-15 21:29:48,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:29:48,161 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:48,161 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:48,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:48,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-15 21:29:48,374 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:48,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:48,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1039880898, now seen corresponding path program 35 times [2022-03-15 21:29:48,375 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:48,375 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759312923] [2022-03-15 21:29:48,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:48,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:48,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:48,755 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:48,756 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:48,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759312923] [2022-03-15 21:29:48,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759312923] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:48,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125645960] [2022-03-15 21:29:48,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:29:48,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:48,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:48,757 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:48,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-15 21:29:48,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 21:29:48,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:48,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 21:29:48,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:49,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:50,143 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:50,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125645960] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:50,143 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:50,143 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 79 [2022-03-15 21:29:50,143 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [760750938] [2022-03-15 21:29:50,143 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:50,148 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:50,163 INFO L252 McrAutomatonBuilder]: Finished intersection with 74 states and 113 transitions. [2022-03-15 21:29:50,163 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:51,009 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 13 new interpolants: [16300#(or (<= (+ i2 11) N2) (<= N2 (+ 9 i2))), 16291#(or (<= N2 i2) (<= (+ 2 i2) N2)), 16293#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2))), 16302#(or (<= N2 (+ i2 11)) (<= (+ i2 13) N2)), 16294#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 16295#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 16297#(or (<= N2 (+ 6 i2)) (<= (+ i2 8) N2)), 16296#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2))), 16298#(or (<= (+ 9 i2) N2) (<= N2 (+ 7 i2))), 16303#(< i1 N1), 16292#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 16301#(or (<= N2 (+ i2 10)) (<= (+ i2 12) N2)), 16299#(or (<= (+ i2 10) N2) (<= N2 (+ i2 8)))] [2022-03-15 21:29:51,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-15 21:29:51,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:51,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-15 21:29:51,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1288, Invalid=7268, Unknown=0, NotChecked=0, Total=8556 [2022-03-15 21:29:51,011 INFO L87 Difference]: Start difference. First operand 170 states and 382 transitions. Second operand has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:52,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:52,161 INFO L93 Difference]: Finished difference Result 290 states and 567 transitions. [2022-03-15 21:29:52,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 21:29:52,161 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:29:52,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:52,162 INFO L225 Difference]: With dead ends: 290 [2022-03-15 21:29:52,162 INFO L226 Difference]: Without dead ends: 244 [2022-03-15 21:29:52,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 27 SyntacticMatches, 14 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5638 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3421, Invalid=13609, Unknown=0, NotChecked=0, Total=17030 [2022-03-15 21:29:52,163 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 261 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:52,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 0 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:29:52,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-15 21:29:52,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 103. [2022-03-15 21:29:52,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0980392156862746) internal successors, (214), 102 states have internal predecessors, (214), 0 states have call successors, (0), 0 states 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 21:29:52,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 214 transitions. [2022-03-15 21:29:52,166 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 214 transitions. Word has length 33 [2022-03-15 21:29:52,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:52,166 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 214 transitions. [2022-03-15 21:29:52,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:52,166 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 214 transitions. [2022-03-15 21:29:52,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:29:52,167 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:52,167 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:52,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-15 21:29:52,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:52,367 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:52,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:52,368 INFO L85 PathProgramCache]: Analyzing trace with hash -813748310, now seen corresponding path program 36 times [2022-03-15 21:29:52,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:52,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495044174] [2022-03-15 21:29:52,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:52,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:52,581 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 79 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:52,581 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:52,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495044174] [2022-03-15 21:29:52,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495044174] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:52,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684868994] [2022-03-15 21:29:52,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:29:52,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:52,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:52,583 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:52,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-15 21:29:52,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-15 21:29:52,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:52,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 21:29:52,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:53,191 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 79 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:53,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:53,841 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:53,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684868994] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:53,841 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:53,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 27, 27] total 66 [2022-03-15 21:29:53,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1345082755] [2022-03-15 21:29:53,841 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:53,845 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:53,856 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 63 transitions. [2022-03-15 21:29:53,856 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:54,030 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [17135#(< i2 N2)] [2022-03-15 21:29:54,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:29:54,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:54,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:29:54,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1093, Invalid=3463, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 21:29:54,032 INFO L87 Difference]: Start difference. First operand 103 states and 214 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:54,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:54,712 INFO L93 Difference]: Finished difference Result 188 states and 366 transitions. [2022-03-15 21:29:54,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 21:29:54,712 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:29:54,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:54,713 INFO L225 Difference]: With dead ends: 188 [2022-03-15 21:29:54,713 INFO L226 Difference]: Without dead ends: 187 [2022-03-15 21:29:54,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 28 SyntacticMatches, 12 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3505 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2615, Invalid=8097, Unknown=0, NotChecked=0, Total=10712 [2022-03-15 21:29:54,714 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 93 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:54,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 0 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:54,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-15 21:29:54,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 91. [2022-03-15 21:29:54,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.111111111111111) internal successors, (190), 90 states have internal predecessors, (190), 0 states have call successors, (0), 0 states 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 21:29:54,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 190 transitions. [2022-03-15 21:29:54,717 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 190 transitions. Word has length 33 [2022-03-15 21:29:54,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:54,717 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 190 transitions. [2022-03-15 21:29:54,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:54,717 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 190 transitions. [2022-03-15 21:29:54,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 21:29:54,718 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:54,718 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:54,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:54,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-15 21:29:54,931 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:54,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:54,932 INFO L85 PathProgramCache]: Analyzing trace with hash 2147264646, now seen corresponding path program 37 times [2022-03-15 21:29:54,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:54,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164094806] [2022-03-15 21:29:54,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:54,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:54,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:55,124 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:55,124 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:55,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164094806] [2022-03-15 21:29:55,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164094806] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:55,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678040074] [2022-03-15 21:29:55,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:29:55,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:55,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:55,126 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:55,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-15 21:29:55,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:55,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-15 21:29:55,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:55,272 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:55,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:55,379 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:55,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678040074] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:55,379 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:55,379 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 14 [2022-03-15 21:29:55,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1155531119] [2022-03-15 21:29:55,379 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:55,383 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:55,398 INFO L252 McrAutomatonBuilder]: Finished intersection with 77 states and 118 transitions. [2022-03-15 21:29:55,398 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:56,460 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 13 new interpolants: [17799#(and (or (<= counter 0) (<= counter (* C 8))) (or (<= (* C 8) counter) (<= counter (* 7 C)))), 17803#(and (or (<= counter (* C 11)) (<= (* C 12) counter)) (or (<= counter (* C 12)) (<= counter 0))), 17804#(and (or (<= counter 0) (<= counter (* C 13))) (or (<= counter (* C 12)) (<= (* C 13) counter))), 17798#(and (or (<= counter 0) (<= counter (* 7 C))) (or (<= counter (* 6 C)) (<= (* 7 C) counter))), 17794#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 17800#(and (or (<= (* 9 C) counter) (<= counter (* C 8))) (or (<= counter 0) (<= counter (* 9 C)))), 17796#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter))), 17793#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 17802#(and (or (<= counter (* C 10)) (<= (* C 11) counter)) (or (<= counter 0) (<= counter (* C 11)))), 17792#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 17801#(and (or (<= (* C 10) counter) (<= counter (* 9 C))) (or (<= counter (* C 10)) (<= counter 0))), 17797#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C)))), 17795#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter)))] [2022-03-15 21:29:56,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 21:29:56,460 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:56,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 21:29:56,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2022-03-15 21:29:56,461 INFO L87 Difference]: Start difference. First operand 91 states and 190 transitions. Second operand has 29 states, 28 states have (on average 3.107142857142857) internal successors, (87), 28 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:56,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:56,887 INFO L93 Difference]: Finished difference Result 281 states and 541 transitions. [2022-03-15 21:29:56,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:29:56,887 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.107142857142857) internal successors, (87), 28 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 21:29:56,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:56,888 INFO L225 Difference]: With dead ends: 281 [2022-03-15 21:29:56,888 INFO L226 Difference]: Without dead ends: 249 [2022-03-15 21:29:56,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2022-03-15 21:29:56,888 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 219 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:56,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 0 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:29:56,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-15 21:29:56,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 183. [2022-03-15 21:29:56,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.2637362637362637) internal successors, (412), 182 states have internal predecessors, (412), 0 states have call successors, (0), 0 states 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 21:29:56,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 412 transitions. [2022-03-15 21:29:56,892 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 412 transitions. Word has length 34 [2022-03-15 21:29:56,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:56,893 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 412 transitions. [2022-03-15 21:29:56,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.107142857142857) internal successors, (87), 28 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:56,893 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 412 transitions. [2022-03-15 21:29:56,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:29:56,893 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:56,894 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:56,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:57,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-15 21:29:57,107 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:57,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:57,108 INFO L85 PathProgramCache]: Analyzing trace with hash -489601088, now seen corresponding path program 38 times [2022-03-15 21:29:57,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:57,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581544181] [2022-03-15 21:29:57,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:57,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:57,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:57,527 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:57,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581544181] [2022-03-15 21:29:57,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581544181] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:57,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145045616] [2022-03-15 21:29:57,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:29:57,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:57,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:57,528 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:57,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-15 21:29:57,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:29:57,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:57,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 21:29:57,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:58,302 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:58,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:59,090 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:59,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145045616] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:59,090 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:59,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 85 [2022-03-15 21:29:59,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1059238547] [2022-03-15 21:29:59,090 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:59,094 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:59,110 INFO L252 McrAutomatonBuilder]: Finished intersection with 79 states and 121 transitions. [2022-03-15 21:29:59,110 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:00,048 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 14 new interpolants: [18746#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 18753#(or (<= N2 (+ i2 11)) (<= (+ i2 13) N2)), 18748#(or (<= N2 (+ 6 i2)) (<= (+ i2 8) N2)), 18749#(or (<= (+ 9 i2) N2) (<= N2 (+ 7 i2))), 18752#(or (<= N2 (+ i2 10)) (<= (+ i2 12) N2)), 18751#(or (<= (+ i2 11) N2) (<= N2 (+ 9 i2))), 18750#(or (<= (+ i2 10) N2) (<= N2 (+ i2 8))), 18755#(< i1 N1), 18745#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 18747#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2))), 18744#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2))), 18742#(or (<= N2 i2) (<= (+ 2 i2) N2)), 18754#(or (<= N2 (+ i2 12)) (<= (+ 14 i2) N2)), 18743#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2))] [2022-03-15 21:30:00,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 21:30:00,049 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:00,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 21:30:00,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1478, Invalid=8422, Unknown=0, NotChecked=0, Total=9900 [2022-03-15 21:30:00,050 INFO L87 Difference]: Start difference. First operand 183 states and 412 transitions. Second operand has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:01,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:01,340 INFO L93 Difference]: Finished difference Result 312 states and 611 transitions. [2022-03-15 21:30:01,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 21:30:01,340 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 21:30:01,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:01,340 INFO L225 Difference]: With dead ends: 312 [2022-03-15 21:30:01,341 INFO L226 Difference]: Without dead ends: 262 [2022-03-15 21:30:01,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 28 SyntacticMatches, 15 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6568 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3957, Invalid=15783, Unknown=0, NotChecked=0, Total=19740 [2022-03-15 21:30:01,342 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 306 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:01,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 0 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:30:01,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-03-15 21:30:01,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 110. [2022-03-15 21:30:01,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1009174311926606) internal successors, (229), 109 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:01,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 229 transitions. [2022-03-15 21:30:01,345 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 229 transitions. Word has length 35 [2022-03-15 21:30:01,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:01,345 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 229 transitions. [2022-03-15 21:30:01,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:01,345 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 229 transitions. [2022-03-15 21:30:01,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:30:01,346 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:01,346 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:01,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-15 21:30:01,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:01,551 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:01,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:01,552 INFO L85 PathProgramCache]: Analyzing trace with hash -2038029332, now seen corresponding path program 39 times [2022-03-15 21:30:01,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:01,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542114893] [2022-03-15 21:30:01,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:01,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:01,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:01,760 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 92 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:01,760 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:01,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542114893] [2022-03-15 21:30:01,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542114893] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:01,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321891552] [2022-03-15 21:30:01,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:30:01,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:01,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:01,762 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:30:01,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-15 21:30:01,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-15 21:30:01,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:01,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 21:30:01,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:02,451 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 92 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:02,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:03,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321891552] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:03,173 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:03,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 29, 29] total 71 [2022-03-15 21:30:03,174 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [509754355] [2022-03-15 21:30:03,174 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:03,177 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:03,188 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 67 transitions. [2022-03-15 21:30:03,188 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:03,387 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [19646#(< i2 N2)] [2022-03-15 21:30:03,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:30:03,388 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:03,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:30:03,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1254, Invalid=4002, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 21:30:03,389 INFO L87 Difference]: Start difference. First operand 110 states and 229 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:04,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:04,186 INFO L93 Difference]: Finished difference Result 202 states and 394 transitions. [2022-03-15 21:30:04,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 21:30:04,186 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 21:30:04,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:04,187 INFO L225 Difference]: With dead ends: 202 [2022-03-15 21:30:04,187 INFO L226 Difference]: Without dead ends: 201 [2022-03-15 21:30:04,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 29 SyntacticMatches, 13 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4102 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3020, Invalid=9412, Unknown=0, NotChecked=0, Total=12432 [2022-03-15 21:30:04,188 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 80 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:04,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 0 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:30:04,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-03-15 21:30:04,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 97. [2022-03-15 21:30:04,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1145833333333335) internal successors, (203), 96 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:04,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 203 transitions. [2022-03-15 21:30:04,191 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 203 transitions. Word has length 35 [2022-03-15 21:30:04,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:04,191 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 203 transitions. [2022-03-15 21:30:04,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:04,191 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 203 transitions. [2022-03-15 21:30:04,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 21:30:04,191 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:04,191 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:04,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-15 21:30:04,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-15 21:30:04,407 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:04,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:04,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1977963336, now seen corresponding path program 40 times [2022-03-15 21:30:04,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:04,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920082202] [2022-03-15 21:30:04,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:04,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:04,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:04,645 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:30:04,645 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:04,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920082202] [2022-03-15 21:30:04,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920082202] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:04,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177969635] [2022-03-15 21:30:04,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:30:04,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:04,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:04,647 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:30:04,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-15 21:30:04,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:30:04,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:04,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 21:30:04,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:04,801 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:30:04,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:04,918 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:30:04,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177969635] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:04,918 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:04,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 15 [2022-03-15 21:30:04,918 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1741037888] [2022-03-15 21:30:04,918 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:04,922 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:04,939 INFO L252 McrAutomatonBuilder]: Finished intersection with 82 states and 126 transitions. [2022-03-15 21:30:04,940 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:06,093 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 14 new interpolants: [20360#(and (or (<= counter 0) (<= counter (* C 13))) (or (<= counter (* C 12)) (<= (* C 13) counter))), 20348#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 20357#(and (or (<= (* C 10) counter) (<= counter (* 9 C))) (or (<= counter (* C 10)) (<= counter 0))), 20361#(and (or (<= (* 14 C) counter) (<= counter (* C 13))) (or (<= counter 0) (<= counter (* 14 C)))), 20353#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C)))), 20358#(and (or (<= counter (* C 10)) (<= (* C 11) counter)) (or (<= counter 0) (<= counter (* C 11)))), 20350#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 20359#(and (or (<= counter (* C 11)) (<= (* C 12) counter)) (or (<= counter (* C 12)) (<= counter 0))), 20349#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 20352#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter))), 20356#(and (or (<= (* 9 C) counter) (<= counter (* C 8))) (or (<= counter 0) (<= counter (* 9 C)))), 20354#(and (or (<= counter 0) (<= counter (* 7 C))) (or (<= counter (* 6 C)) (<= (* 7 C) counter))), 20355#(and (or (<= counter 0) (<= counter (* C 8))) (or (<= (* C 8) counter) (<= counter (* 7 C)))), 20351#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter)))] [2022-03-15 21:30:06,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 21:30:06,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:06,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 21:30:06,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=661, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:30:06,094 INFO L87 Difference]: Start difference. First operand 97 states and 203 transitions. Second operand has 31 states, 30 states have (on average 3.1) internal successors, (93), 30 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:06,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:06,680 INFO L93 Difference]: Finished difference Result 301 states and 580 transitions. [2022-03-15 21:30:06,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:30:06,680 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.1) internal successors, (93), 30 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 21:30:06,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:06,681 INFO L225 Difference]: With dead ends: 301 [2022-03-15 21:30:06,681 INFO L226 Difference]: Without dead ends: 267 [2022-03-15 21:30:06,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=269, Invalid=661, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:30:06,682 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 209 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 1646 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:06,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 0 Invalid, 1705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1646 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:30:06,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-03-15 21:30:06,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 196. [2022-03-15 21:30:06,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.2666666666666666) internal successors, (442), 195 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:06,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 442 transitions. [2022-03-15 21:30:06,686 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 442 transitions. Word has length 36 [2022-03-15 21:30:06,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:06,686 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 442 transitions. [2022-03-15 21:30:06,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.1) internal successors, (93), 30 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:06,686 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 442 transitions. [2022-03-15 21:30:06,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 21:30:06,687 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:06,687 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:06,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-15 21:30:06,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:06,901 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:06,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:06,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1980697602, now seen corresponding path program 41 times [2022-03-15 21:30:06,902 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:06,903 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988943729] [2022-03-15 21:30:06,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:06,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:07,366 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:07,367 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:07,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988943729] [2022-03-15 21:30:07,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988943729] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:07,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163995591] [2022-03-15 21:30:07,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:30:07,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:07,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:07,368 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:30:07,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-15 21:30:07,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-15 21:30:07,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:07,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 21:30:07,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:08,232 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:08,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:09,128 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:09,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163995591] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:09,129 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:09,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 91 [2022-03-15 21:30:09,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1177307779] [2022-03-15 21:30:09,129 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:09,133 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:09,151 INFO L252 McrAutomatonBuilder]: Finished intersection with 84 states and 129 transitions. [2022-03-15 21:30:09,151 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:10,191 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 15 new interpolants: [21368#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2))), 21376#(or (<= (+ i2 15) N2) (<= N2 (+ i2 13))), 21375#(or (<= N2 (+ i2 12)) (<= (+ 14 i2) N2)), 21370#(or (<= (+ 9 i2) N2) (<= N2 (+ 7 i2))), 21367#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 21364#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 21371#(or (<= (+ i2 10) N2) (<= N2 (+ i2 8))), 21372#(or (<= (+ i2 11) N2) (<= N2 (+ 9 i2))), 21366#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 21373#(or (<= N2 (+ i2 10)) (<= (+ i2 12) N2)), 21365#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2))), 21374#(or (<= N2 (+ i2 11)) (<= (+ i2 13) N2)), 21369#(or (<= N2 (+ 6 i2)) (<= (+ i2 8) N2)), 21363#(or (<= N2 i2) (<= (+ 2 i2) N2)), 21377#(< i1 N1)] [2022-03-15 21:30:10,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-15 21:30:10,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:10,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-15 21:30:10,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1681, Invalid=9661, Unknown=0, NotChecked=0, Total=11342 [2022-03-15 21:30:10,192 INFO L87 Difference]: Start difference. First operand 196 states and 442 transitions. Second operand has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 47 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:11,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:11,644 INFO L93 Difference]: Finished difference Result 334 states and 655 transitions. [2022-03-15 21:30:11,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 21:30:11,644 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 47 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-15 21:30:11,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:11,645 INFO L225 Difference]: With dead ends: 334 [2022-03-15 21:30:11,645 INFO L226 Difference]: Without dead ends: 280 [2022-03-15 21:30:11,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 29 SyntacticMatches, 16 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7569 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4532, Invalid=18118, Unknown=0, NotChecked=0, Total=22650 [2022-03-15 21:30:11,646 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 253 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:11,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 0 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:30:11,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-03-15 21:30:11,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 117. [2022-03-15 21:30:11,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.103448275862069) internal successors, (244), 116 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:11,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 244 transitions. [2022-03-15 21:30:11,650 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 244 transitions. Word has length 37 [2022-03-15 21:30:11,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:11,650 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 244 transitions. [2022-03-15 21:30:11,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 47 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:11,650 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 244 transitions. [2022-03-15 21:30:11,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 21:30:11,650 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:11,650 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:11,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-15 21:30:11,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:11,867 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:11,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:11,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1303564650, now seen corresponding path program 42 times [2022-03-15 21:30:11,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:11,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754555413] [2022-03-15 21:30:11,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:11,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:12,100 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 106 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:12,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:12,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754555413] [2022-03-15 21:30:12,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754555413] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:12,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142528947] [2022-03-15 21:30:12,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:30:12,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:12,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:12,102 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:30:12,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-15 21:30:12,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-15 21:30:12,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:12,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 21:30:12,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:12,848 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 106 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:12,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:13,676 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:13,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142528947] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:13,677 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:13,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 31, 31] total 76 [2022-03-15 21:30:13,677 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [301577341] [2022-03-15 21:30:13,677 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:13,680 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:13,693 INFO L252 McrAutomatonBuilder]: Finished intersection with 55 states and 71 transitions. [2022-03-15 21:30:13,693 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:13,922 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [22327#(< i2 N2)] [2022-03-15 21:30:13,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:30:13,923 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:13,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:30:13,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1426, Invalid=4580, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 21:30:13,923 INFO L87 Difference]: Start difference. First operand 117 states and 244 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:14,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:14,793 INFO L93 Difference]: Finished difference Result 216 states and 422 transitions. [2022-03-15 21:30:14,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-15 21:30:14,794 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-15 21:30:14,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:14,795 INFO L225 Difference]: With dead ends: 216 [2022-03-15 21:30:14,795 INFO L226 Difference]: Without dead ends: 215 [2022-03-15 21:30:14,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 30 SyntacticMatches, 14 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4746 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3454, Invalid=10826, Unknown=0, NotChecked=0, Total=14280 [2022-03-15 21:30:14,797 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 137 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:14,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 0 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:30:14,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-03-15 21:30:14,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 103. [2022-03-15 21:30:14,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.1176470588235294) internal successors, (216), 102 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:14,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 216 transitions. [2022-03-15 21:30:14,799 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 216 transitions. Word has length 37 [2022-03-15 21:30:14,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:14,800 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 216 transitions. [2022-03-15 21:30:14,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:14,800 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 216 transitions. [2022-03-15 21:30:14,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-15 21:30:14,800 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:14,800 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:14,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-15 21:30:15,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-15 21:30:15,024 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:15,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:15,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1247811398, now seen corresponding path program 43 times [2022-03-15 21:30:15,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:15,025 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025007747] [2022-03-15 21:30:15,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:15,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:15,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:15,274 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 239 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:30:15,274 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:15,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025007747] [2022-03-15 21:30:15,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025007747] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:15,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685493117] [2022-03-15 21:30:15,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:30:15,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:15,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:15,276 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:30:15,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-15 21:30:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:15,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-15 21:30:15,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:15,438 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 239 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:30:15,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:15,561 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 239 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:30:15,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685493117] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:15,561 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:15,561 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 16 [2022-03-15 21:30:15,561 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1583499905] [2022-03-15 21:30:15,562 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:15,566 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:15,591 INFO L252 McrAutomatonBuilder]: Finished intersection with 87 states and 134 transitions. [2022-03-15 21:30:15,591 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:16,971 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 15 new interpolants: [23081#(and (or (<= counter 0) (<= counter (* C 8))) (or (<= (* C 8) counter) (<= counter (* 7 C)))), 23084#(and (or (<= counter (* C 10)) (<= (* C 11) counter)) (or (<= counter 0) (<= counter (* C 11)))), 23080#(and (or (<= counter 0) (<= counter (* 7 C))) (or (<= counter (* 6 C)) (<= (* 7 C) counter))), 23079#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C)))), 23088#(and (or (<= (* C 15) counter) (<= counter (* 14 C))) (or (<= counter 0) (<= counter (* C 15)))), 23076#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 23087#(and (or (<= (* 14 C) counter) (<= counter (* C 13))) (or (<= counter 0) (<= counter (* 14 C)))), 23075#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 23077#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter))), 23086#(and (or (<= counter 0) (<= counter (* C 13))) (or (<= counter (* C 12)) (<= (* C 13) counter))), 23082#(and (or (<= (* 9 C) counter) (<= counter (* C 8))) (or (<= counter 0) (<= counter (* 9 C)))), 23085#(and (or (<= counter (* C 11)) (<= (* C 12) counter)) (or (<= counter (* C 12)) (<= counter 0))), 23074#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 23083#(and (or (<= (* C 10) counter) (<= counter (* 9 C))) (or (<= counter (* C 10)) (<= counter 0))), 23078#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter)))] [2022-03-15 21:30:16,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 21:30:16,972 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:16,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 21:30:16,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:30:16,973 INFO L87 Difference]: Start difference. First operand 103 states and 216 transitions. Second operand has 33 states, 32 states have (on average 3.09375) internal successors, (99), 32 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:17,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:17,523 INFO L93 Difference]: Finished difference Result 321 states and 619 transitions. [2022-03-15 21:30:17,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 21:30:17,524 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.09375) internal successors, (99), 32 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-03-15 21:30:17,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:17,525 INFO L225 Difference]: With dead ends: 321 [2022-03-15 21:30:17,525 INFO L226 Difference]: Without dead ends: 285 [2022-03-15 21:30:17,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 119 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:30:17,525 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 255 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 1486 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:17,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 0 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1486 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:30:17,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-03-15 21:30:17,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 209. [2022-03-15 21:30:17,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.269230769230769) internal successors, (472), 208 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:17,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 472 transitions. [2022-03-15 21:30:17,530 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 472 transitions. Word has length 38 [2022-03-15 21:30:17,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:17,530 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 472 transitions. [2022-03-15 21:30:17,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.09375) internal successors, (99), 32 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:17,531 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 472 transitions. [2022-03-15 21:30:17,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 21:30:17,531 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:17,531 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:17,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-15 21:30:17,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-15 21:30:17,735 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:17,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:17,736 INFO L85 PathProgramCache]: Analyzing trace with hash -419526272, now seen corresponding path program 44 times [2022-03-15 21:30:17,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:17,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317899861] [2022-03-15 21:30:17,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:17,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:17,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:18,258 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:18,258 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:18,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317899861] [2022-03-15 21:30:18,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317899861] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:18,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922757925] [2022-03-15 21:30:18,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:30:18,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:18,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:18,259 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:30:18,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-15 21:30:18,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:30:18,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:18,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 21:30:18,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:19,250 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:19,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:20,238 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:20,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922757925] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:20,238 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:20,238 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 97 [2022-03-15 21:30:20,238 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [833894788] [2022-03-15 21:30:20,238 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:20,242 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:20,264 INFO L252 McrAutomatonBuilder]: Finished intersection with 89 states and 137 transitions. [2022-03-15 21:30:20,264 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:21,419 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 16 new interpolants: [24167#(or (<= (+ i2 15) N2) (<= N2 (+ i2 13))), 24157#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 24156#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2))), 24154#(or (<= N2 i2) (<= (+ 2 i2) N2)), 24166#(or (<= N2 (+ i2 12)) (<= (+ 14 i2) N2)), 24159#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2))), 24158#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 24162#(or (<= (+ i2 10) N2) (<= N2 (+ i2 8))), 24168#(or (<= N2 (+ 14 i2)) (<= (+ 16 i2) N2)), 24160#(or (<= N2 (+ 6 i2)) (<= (+ i2 8) N2)), 24155#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 24161#(or (<= (+ 9 i2) N2) (<= N2 (+ 7 i2))), 24163#(or (<= (+ i2 11) N2) (<= N2 (+ 9 i2))), 24165#(or (<= N2 (+ i2 11)) (<= (+ i2 13) N2)), 24164#(or (<= N2 (+ i2 10)) (<= (+ i2 12) N2)), 24169#(< i1 N1)] [2022-03-15 21:30:21,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-15 21:30:21,420 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:21,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-15 21:30:21,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1897, Invalid=10985, Unknown=0, NotChecked=0, Total=12882 [2022-03-15 21:30:21,421 INFO L87 Difference]: Start difference. First operand 209 states and 472 transitions. Second operand has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:23,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:23,050 INFO L93 Difference]: Finished difference Result 356 states and 699 transitions. [2022-03-15 21:30:23,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 21:30:23,050 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 21:30:23,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:23,051 INFO L225 Difference]: With dead ends: 356 [2022-03-15 21:30:23,051 INFO L226 Difference]: Without dead ends: 298 [2022-03-15 21:30:23,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 30 SyntacticMatches, 17 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8641 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5146, Invalid=20614, Unknown=0, NotChecked=0, Total=25760 [2022-03-15 21:30:23,055 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 349 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:23,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 0 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:30:23,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-03-15 21:30:23,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 124. [2022-03-15 21:30:23,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.105691056910569) internal successors, (259), 123 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:23,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 259 transitions. [2022-03-15 21:30:23,058 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 259 transitions. Word has length 39 [2022-03-15 21:30:23,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:23,058 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 259 transitions. [2022-03-15 21:30:23,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:23,058 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 259 transitions. [2022-03-15 21:30:23,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 21:30:23,059 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:23,059 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:23,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-15 21:30:23,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-15 21:30:23,271 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:23,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:23,272 INFO L85 PathProgramCache]: Analyzing trace with hash 143691052, now seen corresponding path program 45 times [2022-03-15 21:30:23,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:23,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963151673] [2022-03-15 21:30:23,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:23,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:23,538 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 121 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:23,538 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:23,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963151673] [2022-03-15 21:30:23,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963151673] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:23,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855654304] [2022-03-15 21:30:23,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:30:23,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:23,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:23,539 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:30:23,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-15 21:30:23,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-15 21:30:23,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:23,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 21:30:23,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:24,377 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 121 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:24,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:25,281 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:25,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855654304] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:25,281 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:25,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 33, 33] total 81 [2022-03-15 21:30:25,282 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2057122571] [2022-03-15 21:30:25,282 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:25,286 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:25,305 INFO L252 McrAutomatonBuilder]: Finished intersection with 58 states and 75 transitions. [2022-03-15 21:30:25,305 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:25,604 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [25178#(< i2 N2)] [2022-03-15 21:30:25,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:30:25,605 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:25,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:30:25,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1609, Invalid=5197, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 21:30:25,606 INFO L87 Difference]: Start difference. First operand 124 states and 259 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 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 21:30:26,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:26,613 INFO L93 Difference]: Finished difference Result 230 states and 450 transitions. [2022-03-15 21:30:26,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-15 21:30:26,614 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 21:30:26,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:26,614 INFO L225 Difference]: With dead ends: 230 [2022-03-15 21:30:26,614 INFO L226 Difference]: Without dead ends: 229 [2022-03-15 21:30:26,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 31 SyntacticMatches, 15 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5437 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3917, Invalid=12339, Unknown=0, NotChecked=0, Total=16256 [2022-03-15 21:30:26,616 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 110 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:26,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 0 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:30:26,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-03-15 21:30:26,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 109. [2022-03-15 21:30:26,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.1203703703703702) internal successors, (229), 108 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:26,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 229 transitions. [2022-03-15 21:30:26,618 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 229 transitions. Word has length 39 [2022-03-15 21:30:26,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:26,619 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 229 transitions. [2022-03-15 21:30:26,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 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 21:30:26,619 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 229 transitions. [2022-03-15 21:30:26,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-15 21:30:26,619 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:26,619 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:26,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-15 21:30:26,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:26,827 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:26,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:26,828 INFO L85 PathProgramCache]: Analyzing trace with hash -144684664, now seen corresponding path program 46 times [2022-03-15 21:30:26,829 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:26,829 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720301115] [2022-03-15 21:30:26,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:26,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:26,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:30:27,098 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:27,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720301115] [2022-03-15 21:30:27,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720301115] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:27,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204028039] [2022-03-15 21:30:27,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:30:27,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:27,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:27,100 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:30:27,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-15 21:30:27,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:30:27,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:27,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-15 21:30:27,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:30:27,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:27,498 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:30:27,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204028039] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:27,498 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:27,499 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 17 [2022-03-15 21:30:27,499 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1870307220] [2022-03-15 21:30:27,499 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:27,502 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:27,537 INFO L252 McrAutomatonBuilder]: Finished intersection with 92 states and 142 transitions. [2022-03-15 21:30:27,538 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:28,987 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 16 new interpolants: [25981#(and (or (<= counter (* C 11)) (<= (* C 12) counter)) (or (<= counter (* C 12)) (<= counter 0))), 25984#(and (or (<= (* C 15) counter) (<= counter (* 14 C))) (or (<= counter 0) (<= counter (* C 15)))), 25974#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter))), 25983#(and (or (<= (* 14 C) counter) (<= counter (* C 13))) (or (<= counter 0) (<= counter (* 14 C)))), 25976#(and (or (<= counter 0) (<= counter (* 7 C))) (or (<= counter (* 6 C)) (<= (* 7 C) counter))), 25977#(and (or (<= counter 0) (<= counter (* C 8))) (or (<= (* C 8) counter) (<= counter (* 7 C)))), 25975#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C)))), 25979#(and (or (<= (* C 10) counter) (<= counter (* 9 C))) (or (<= counter (* C 10)) (<= counter 0))), 25978#(and (or (<= (* 9 C) counter) (<= counter (* C 8))) (or (<= counter 0) (<= counter (* 9 C)))), 25980#(and (or (<= counter (* C 10)) (<= (* C 11) counter)) (or (<= counter 0) (<= counter (* C 11)))), 25970#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 25971#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 25972#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 25982#(and (or (<= counter 0) (<= counter (* C 13))) (or (<= counter (* C 12)) (<= (* C 13) counter))), 25985#(and (or (<= counter 0) (<= counter (* 16 C))) (or (<= (* 16 C) counter) (<= counter (* C 15)))), 25973#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter)))] [2022-03-15 21:30:28,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 21:30:28,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:28,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 21:30:28,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=851, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:30:28,988 INFO L87 Difference]: Start difference. First operand 109 states and 229 transitions. Second operand has 35 states, 34 states have (on average 3.088235294117647) internal successors, (105), 34 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:29,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:29,616 INFO L93 Difference]: Finished difference Result 341 states and 658 transitions. [2022-03-15 21:30:29,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:30:29,617 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.088235294117647) internal successors, (105), 34 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-03-15 21:30:29,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:29,618 INFO L225 Difference]: With dead ends: 341 [2022-03-15 21:30:29,618 INFO L226 Difference]: Without dead ends: 303 [2022-03-15 21:30:29,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=339, Invalid=851, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:30:29,618 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 237 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 1644 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:29,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 0 Invalid, 1700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1644 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:30:29,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-03-15 21:30:29,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 222. [2022-03-15 21:30:29,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.271493212669683) internal successors, (502), 221 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:29,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 502 transitions. [2022-03-15 21:30:29,623 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 502 transitions. Word has length 40 [2022-03-15 21:30:29,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:29,623 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 502 transitions. [2022-03-15 21:30:29,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.088235294117647) internal successors, (105), 34 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:29,623 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 502 transitions. [2022-03-15 21:30:29,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-15 21:30:29,623 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:29,624 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:29,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-15 21:30:29,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-15 21:30:29,831 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:29,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:29,832 INFO L85 PathProgramCache]: Analyzing trace with hash -433384126, now seen corresponding path program 47 times [2022-03-15 21:30:29,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:29,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485977136] [2022-03-15 21:30:29,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:29,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:30,510 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 136 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:30,510 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:30,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485977136] [2022-03-15 21:30:30,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485977136] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:30,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511769877] [2022-03-15 21:30:30,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:30:30,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:30,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:30,511 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:30:30,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-15 21:30:30,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-03-15 21:30:30,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:30,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 21:30:30,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:31,595 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 136 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:31,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 136 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:32,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511769877] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:32,701 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:32,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 103 [2022-03-15 21:30:32,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2095899722] [2022-03-15 21:30:32,701 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:32,705 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:32,729 INFO L252 McrAutomatonBuilder]: Finished intersection with 94 states and 145 transitions. [2022-03-15 21:30:32,729 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:33,994 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 17 new interpolants: [27126#(or (<= N2 (+ i2 11)) (<= (+ i2 13) N2)), 27124#(or (<= (+ i2 11) N2) (<= N2 (+ 9 i2))), 27129#(or (<= N2 (+ 14 i2)) (<= (+ 16 i2) N2)), 27119#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 27121#(or (<= N2 (+ 6 i2)) (<= (+ i2 8) N2)), 27116#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 27120#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2))), 27117#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2))), 27123#(or (<= (+ i2 10) N2) (<= N2 (+ i2 8))), 27130#(or (<= N2 (+ i2 15)) (<= (+ i2 17) N2)), 27131#(< i1 N1), 27122#(or (<= (+ 9 i2) N2) (<= N2 (+ 7 i2))), 27127#(or (<= N2 (+ i2 12)) (<= (+ 14 i2) N2)), 27125#(or (<= N2 (+ i2 10)) (<= (+ i2 12) N2)), 27128#(or (<= (+ i2 15) N2) (<= N2 (+ i2 13))), 27115#(or (<= N2 i2) (<= (+ 2 i2) N2)), 27118#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2))] [2022-03-15 21:30:33,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-15 21:30:33,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:33,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-15 21:30:33,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2126, Invalid=12394, Unknown=0, NotChecked=0, Total=14520 [2022-03-15 21:30:33,996 INFO L87 Difference]: Start difference. First operand 222 states and 502 transitions. Second operand has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 53 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:35,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:35,825 INFO L93 Difference]: Finished difference Result 378 states and 743 transitions. [2022-03-15 21:30:35,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 21:30:35,825 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 53 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-15 21:30:35,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:35,826 INFO L225 Difference]: With dead ends: 378 [2022-03-15 21:30:35,826 INFO L226 Difference]: Without dead ends: 316 [2022-03-15 21:30:35,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 31 SyntacticMatches, 18 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9784 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5799, Invalid=23271, Unknown=0, NotChecked=0, Total=29070 [2022-03-15 21:30:35,828 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 344 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:35,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 0 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1114 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:30:35,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-03-15 21:30:35,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 131. [2022-03-15 21:30:35,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1076923076923078) internal successors, (274), 130 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:35,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 274 transitions. [2022-03-15 21:30:35,831 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 274 transitions. Word has length 41 [2022-03-15 21:30:35,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:35,831 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 274 transitions. [2022-03-15 21:30:35,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 53 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:35,831 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 274 transitions. [2022-03-15 21:30:35,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-15 21:30:35,832 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:35,832 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:35,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-15 21:30:36,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-15 21:30:36,047 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:36,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:36,048 INFO L85 PathProgramCache]: Analyzing trace with hash -74013910, now seen corresponding path program 48 times [2022-03-15 21:30:36,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:36,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577968762] [2022-03-15 21:30:36,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:36,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 137 proven. 152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:36,341 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:36,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577968762] [2022-03-15 21:30:36,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577968762] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:36,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753809101] [2022-03-15 21:30:36,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:30:36,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:36,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:36,343 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:30:36,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-15 21:30:36,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-15 21:30:36,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:36,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 21:30:36,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 137 proven. 152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:37,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:38,316 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:38,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753809101] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:38,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:38,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 35, 35] total 86 [2022-03-15 21:30:38,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1698429481] [2022-03-15 21:30:38,317 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:38,320 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:38,337 INFO L252 McrAutomatonBuilder]: Finished intersection with 61 states and 79 transitions. [2022-03-15 21:30:38,337 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:38,593 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [28199#(< i2 N2)] [2022-03-15 21:30:38,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:30:38,593 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:38,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:30:38,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1803, Invalid=5853, Unknown=0, NotChecked=0, Total=7656 [2022-03-15 21:30:38,594 INFO L87 Difference]: Start difference. First operand 131 states and 274 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:39,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:39,671 INFO L93 Difference]: Finished difference Result 244 states and 478 transitions. [2022-03-15 21:30:39,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-15 21:30:39,672 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-15 21:30:39,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:39,673 INFO L225 Difference]: With dead ends: 244 [2022-03-15 21:30:39,673 INFO L226 Difference]: Without dead ends: 243 [2022-03-15 21:30:39,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 32 SyntacticMatches, 16 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6175 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4409, Invalid=13951, Unknown=0, NotChecked=0, Total=18360 [2022-03-15 21:30:39,674 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 99 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:39,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 0 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:30:39,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-03-15 21:30:39,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 115. [2022-03-15 21:30:39,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.1228070175438596) internal successors, (242), 114 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:39,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 242 transitions. [2022-03-15 21:30:39,677 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 242 transitions. Word has length 41 [2022-03-15 21:30:39,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:39,678 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 242 transitions. [2022-03-15 21:30:39,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:39,678 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 242 transitions. [2022-03-15 21:30:39,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-15 21:30:39,678 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:39,678 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:39,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-15 21:30:39,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:39,891 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:39,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:39,892 INFO L85 PathProgramCache]: Analyzing trace with hash -574278138, now seen corresponding path program 49 times [2022-03-15 21:30:39,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:39,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428817786] [2022-03-15 21:30:39,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:39,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:39,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:40,241 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 305 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:30:40,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:40,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428817786] [2022-03-15 21:30:40,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428817786] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:40,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674732879] [2022-03-15 21:30:40,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:30:40,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:40,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:40,244 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:30:40,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-15 21:30:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:40,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-15 21:30:40,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:40,460 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 305 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:30:40,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:40,626 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 305 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:30:40,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674732879] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:40,627 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:40,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 18 [2022-03-15 21:30:40,627 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [786146304] [2022-03-15 21:30:40,627 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:40,632 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:40,668 INFO L252 McrAutomatonBuilder]: Finished intersection with 97 states and 150 transitions. [2022-03-15 21:30:40,668 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:42,190 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 17 new interpolants: [29038#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 29046#(and (or (<= counter (* C 10)) (<= (* C 11) counter)) (or (<= counter 0) (<= counter (* C 11)))), 29048#(and (or (<= counter 0) (<= counter (* C 13))) (or (<= counter (* C 12)) (<= (* C 13) counter))), 29036#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 29042#(and (or (<= counter 0) (<= counter (* 7 C))) (or (<= counter (* 6 C)) (<= (* 7 C) counter))), 29050#(and (or (<= (* C 15) counter) (<= counter (* 14 C))) (or (<= counter 0) (<= counter (* C 15)))), 29045#(and (or (<= (* C 10) counter) (<= counter (* 9 C))) (or (<= counter (* C 10)) (<= counter 0))), 29052#(and (or (<= counter 0) (<= counter (* C 17))) (or (<= (* C 17) counter) (<= counter (* 16 C)))), 29051#(and (or (<= counter 0) (<= counter (* 16 C))) (or (<= (* 16 C) counter) (<= counter (* C 15)))), 29047#(and (or (<= counter (* C 11)) (<= (* C 12) counter)) (or (<= counter (* C 12)) (<= counter 0))), 29041#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C)))), 29043#(and (or (<= counter 0) (<= counter (* C 8))) (or (<= (* C 8) counter) (<= counter (* 7 C)))), 29037#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 29044#(and (or (<= (* 9 C) counter) (<= counter (* C 8))) (or (<= counter 0) (<= counter (* 9 C)))), 29049#(and (or (<= (* 14 C) counter) (<= counter (* C 13))) (or (<= counter 0) (<= counter (* 14 C)))), 29039#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter))), 29040#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter)))] [2022-03-15 21:30:42,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 21:30:42,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:42,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 21:30:42,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:30:42,191 INFO L87 Difference]: Start difference. First operand 115 states and 242 transitions. Second operand has 37 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 36 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:42,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:42,893 INFO L93 Difference]: Finished difference Result 361 states and 697 transitions. [2022-03-15 21:30:42,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 21:30:42,894 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 36 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-15 21:30:42,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:42,895 INFO L225 Difference]: With dead ends: 361 [2022-03-15 21:30:42,895 INFO L226 Difference]: Without dead ends: 321 [2022-03-15 21:30:42,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:30:42,896 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 215 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 1923 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:42,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 0 Invalid, 1979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1923 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 21:30:42,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-03-15 21:30:42,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 235. [2022-03-15 21:30:42,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.2735042735042734) internal successors, (532), 234 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:42,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 532 transitions. [2022-03-15 21:30:42,900 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 532 transitions. Word has length 42 [2022-03-15 21:30:42,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:42,901 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 532 transitions. [2022-03-15 21:30:42,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 36 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:42,901 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 532 transitions. [2022-03-15 21:30:42,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-15 21:30:42,902 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:42,902 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:42,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-15 21:30:43,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-15 21:30:43,115 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:43,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:43,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1158413120, now seen corresponding path program 50 times [2022-03-15 21:30:43,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:43,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167850046] [2022-03-15 21:30:43,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:43,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:43,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:43,716 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 153 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:43,716 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:43,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167850046] [2022-03-15 21:30:43,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167850046] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:43,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250319876] [2022-03-15 21:30:43,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:30:43,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:43,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:43,720 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:30:43,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-15 21:30:43,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:30:43,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:43,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 21:30:43,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:44,873 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 153 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:44,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:46,060 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 153 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:46,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250319876] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:46,060 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:46,060 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 109 [2022-03-15 21:30:46,060 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [999195878] [2022-03-15 21:30:46,061 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:46,067 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:46,105 INFO L252 McrAutomatonBuilder]: Finished intersection with 99 states and 153 transitions. [2022-03-15 21:30:46,105 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:47,549 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 18 new interpolants: [30259#(or (<= (+ i2 15) N2) (<= N2 (+ i2 13))), 30260#(or (<= N2 (+ 14 i2)) (<= (+ 16 i2) N2)), 30256#(or (<= N2 (+ i2 10)) (<= (+ i2 12) N2)), 30261#(or (<= N2 (+ i2 15)) (<= (+ i2 17) N2)), 30255#(or (<= (+ i2 11) N2) (<= N2 (+ 9 i2))), 30253#(or (<= (+ 9 i2) N2) (<= N2 (+ 7 i2))), 30251#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2))), 30248#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2))), 30250#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 30249#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 30252#(or (<= N2 (+ 6 i2)) (<= (+ i2 8) N2)), 30262#(or (<= N2 (+ 16 i2)) (<= (+ i2 18) N2)), 30247#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 30246#(or (<= N2 i2) (<= (+ 2 i2) N2)), 30263#(< i1 N1), 30254#(or (<= (+ i2 10) N2) (<= N2 (+ i2 8))), 30257#(or (<= N2 (+ i2 11)) (<= (+ i2 13) N2)), 30258#(or (<= N2 (+ i2 12)) (<= (+ 14 i2) N2))] [2022-03-15 21:30:47,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-15 21:30:47,550 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:47,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-15 21:30:47,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2368, Invalid=13888, Unknown=0, NotChecked=0, Total=16256 [2022-03-15 21:30:47,551 INFO L87 Difference]: Start difference. First operand 235 states and 532 transitions. Second operand has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:49,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:49,526 INFO L93 Difference]: Finished difference Result 400 states and 787 transitions. [2022-03-15 21:30:49,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-15 21:30:49,526 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-15 21:30:49,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:49,527 INFO L225 Difference]: With dead ends: 400 [2022-03-15 21:30:49,527 INFO L226 Difference]: Without dead ends: 334 [2022-03-15 21:30:49,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 32 SyntacticMatches, 19 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10998 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6491, Invalid=26089, Unknown=0, NotChecked=0, Total=32580 [2022-03-15 21:30:49,529 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 325 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:49,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 0 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1376 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:30:49,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-03-15 21:30:49,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 138. [2022-03-15 21:30:49,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.1094890510948905) internal successors, (289), 137 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:49,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 289 transitions. [2022-03-15 21:30:49,532 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 289 transitions. Word has length 43 [2022-03-15 21:30:49,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:49,532 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 289 transitions. [2022-03-15 21:30:49,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:49,532 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 289 transitions. [2022-03-15 21:30:49,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-15 21:30:49,532 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:49,532 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:49,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-15 21:30:49,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:49,754 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:49,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:49,754 INFO L85 PathProgramCache]: Analyzing trace with hash -506509716, now seen corresponding path program 51 times [2022-03-15 21:30:49,754 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:49,755 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78390661] [2022-03-15 21:30:49,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:49,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:50,109 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 154 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:50,109 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:50,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78390661] [2022-03-15 21:30:50,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78390661] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:50,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112458140] [2022-03-15 21:30:50,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:30:50,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:50,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:50,112 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:30:50,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-15 21:30:50,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-03-15 21:30:50,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:50,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 21:30:50,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 154 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:51,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:52,371 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:52,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112458140] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:52,371 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:52,371 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 37, 37] total 91 [2022-03-15 21:30:52,371 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [745473240] [2022-03-15 21:30:52,371 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:52,375 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:52,393 INFO L252 McrAutomatonBuilder]: Finished intersection with 64 states and 83 transitions. [2022-03-15 21:30:52,394 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:52,687 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [31390#(< i2 N2)] [2022-03-15 21:30:52,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:30:52,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:52,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:30:52,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2008, Invalid=6548, Unknown=0, NotChecked=0, Total=8556 [2022-03-15 21:30:52,688 INFO L87 Difference]: Start difference. First operand 138 states and 289 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:53,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:53,850 INFO L93 Difference]: Finished difference Result 258 states and 506 transitions. [2022-03-15 21:30:53,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-15 21:30:53,850 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-15 21:30:53,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:53,851 INFO L225 Difference]: With dead ends: 258 [2022-03-15 21:30:53,851 INFO L226 Difference]: Without dead ends: 257 [2022-03-15 21:30:53,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 33 SyntacticMatches, 17 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6960 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4930, Invalid=15662, Unknown=0, NotChecked=0, Total=20592 [2022-03-15 21:30:53,852 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 122 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:53,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 0 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:30:53,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-03-15 21:30:53,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 121. [2022-03-15 21:30:53,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.125) internal successors, (255), 120 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:53,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 255 transitions. [2022-03-15 21:30:53,856 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 255 transitions. Word has length 43 [2022-03-15 21:30:53,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:53,856 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 255 transitions. [2022-03-15 21:30:53,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:53,856 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 255 transitions. [2022-03-15 21:30:53,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-15 21:30:53,857 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:53,857 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:53,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-15 21:30:54,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-03-15 21:30:54,063 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:54,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:54,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1526796232, now seen corresponding path program 52 times [2022-03-15 21:30:54,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:54,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398386807] [2022-03-15 21:30:54,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:54,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:54,438 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 341 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:30:54,438 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:54,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398386807] [2022-03-15 21:30:54,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398386807] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:54,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212193085] [2022-03-15 21:30:54,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:30:54,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:54,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:54,441 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:30:54,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-15 21:30:54,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:30:54,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:54,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-15 21:30:54,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 341 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:30:54,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 341 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:30:54,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212193085] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:54,813 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:54,813 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 19 [2022-03-15 21:30:54,813 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [968934775] [2022-03-15 21:30:54,813 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:54,818 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:54,858 INFO L252 McrAutomatonBuilder]: Finished intersection with 102 states and 158 transitions. [2022-03-15 21:30:54,858 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:56,407 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 18 new interpolants: [32286#(and (or (<= (* C 15) counter) (<= counter (* 14 C))) (or (<= counter 0) (<= counter (* C 15)))), 32277#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C)))), 32274#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 32289#(and (or (<= counter (* C 17)) (<= (* C 18) counter)) (or (<= counter 0) (<= counter (* C 18)))), 32276#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter))), 32278#(and (or (<= counter 0) (<= counter (* 7 C))) (or (<= counter (* 6 C)) (<= (* 7 C) counter))), 32284#(and (or (<= counter 0) (<= counter (* C 13))) (or (<= counter (* C 12)) (<= (* C 13) counter))), 32282#(and (or (<= counter (* C 10)) (<= (* C 11) counter)) (or (<= counter 0) (<= counter (* C 11)))), 32272#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 32275#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter))), 32287#(and (or (<= counter 0) (<= counter (* 16 C))) (or (<= (* 16 C) counter) (<= counter (* C 15)))), 32280#(and (or (<= (* 9 C) counter) (<= counter (* C 8))) (or (<= counter 0) (<= counter (* 9 C)))), 32281#(and (or (<= (* C 10) counter) (<= counter (* 9 C))) (or (<= counter (* C 10)) (<= counter 0))), 32285#(and (or (<= (* 14 C) counter) (<= counter (* C 13))) (or (<= counter 0) (<= counter (* 14 C)))), 32283#(and (or (<= counter (* C 11)) (<= (* C 12) counter)) (or (<= counter (* C 12)) (<= counter 0))), 32273#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 32279#(and (or (<= counter 0) (<= counter (* C 8))) (or (<= (* C 8) counter) (<= counter (* 7 C)))), 32288#(and (or (<= counter 0) (<= counter (* C 17))) (or (<= (* C 17) counter) (<= counter (* 16 C))))] [2022-03-15 21:30:56,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-15 21:30:56,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:56,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-15 21:30:56,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=1065, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:30:56,408 INFO L87 Difference]: Start difference. First operand 121 states and 255 transitions. Second operand has 39 states, 38 states have (on average 3.0789473684210527) internal successors, (117), 38 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:57,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:57,172 INFO L93 Difference]: Finished difference Result 381 states and 736 transitions. [2022-03-15 21:30:57,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 21:30:57,173 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.0789473684210527) internal successors, (117), 38 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-15 21:30:57,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:57,174 INFO L225 Difference]: With dead ends: 381 [2022-03-15 21:30:57,174 INFO L226 Difference]: Without dead ends: 339 [2022-03-15 21:30:57,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 140 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=417, Invalid=1065, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:30:57,174 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 321 mSDsluCounter, 1225 mSDsCounter, 0 mSdLazyCounter, 2082 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:57,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 0 Invalid, 2156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2082 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 21:30:57,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-03-15 21:30:57,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 248. [2022-03-15 21:30:57,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.2753036437246963) internal successors, (562), 247 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:57,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 562 transitions. [2022-03-15 21:30:57,178 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 562 transitions. Word has length 44 [2022-03-15 21:30:57,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:57,178 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 562 transitions. [2022-03-15 21:30:57,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.0789473684210527) internal successors, (117), 38 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:57,178 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 562 transitions. [2022-03-15 21:30:57,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-15 21:30:57,179 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:57,179 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:57,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-15 21:30:57,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-15 21:30:57,391 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:57,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:57,392 INFO L85 PathProgramCache]: Analyzing trace with hash 195784322, now seen corresponding path program 53 times [2022-03-15 21:30:57,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:57,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784120500] [2022-03-15 21:30:57,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:57,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:58,142 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 171 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:58,142 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:58,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784120500] [2022-03-15 21:30:58,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784120500] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:58,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193720593] [2022-03-15 21:30:58,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:30:58,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:58,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:58,143 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:30:58,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-15 21:30:58,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-03-15 21:30:58,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:58,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 21:30:58,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:59,416 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 171 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:59,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:31:00,726 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 171 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:31:00,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193720593] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:31:00,727 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:31:00,727 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 115 [2022-03-15 21:31:00,727 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1599208338] [2022-03-15 21:31:00,727 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:31:00,731 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:31:00,761 INFO L252 McrAutomatonBuilder]: Finished intersection with 104 states and 161 transitions. [2022-03-15 21:31:00,761 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:31:02,241 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 19 new interpolants: [33565#(< i1 N1), 33550#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 33549#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2))), 33560#(or (<= (+ i2 15) N2) (<= N2 (+ i2 13))), 33564#(or (<= N2 (+ i2 17)) (<= (+ 19 i2) N2)), 33559#(or (<= N2 (+ i2 12)) (<= (+ 14 i2) N2)), 33548#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 33562#(or (<= N2 (+ i2 15)) (<= (+ i2 17) N2)), 33553#(or (<= N2 (+ 6 i2)) (<= (+ i2 8) N2)), 33552#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2))), 33563#(or (<= N2 (+ 16 i2)) (<= (+ i2 18) N2)), 33556#(or (<= (+ i2 11) N2) (<= N2 (+ 9 i2))), 33547#(or (<= N2 i2) (<= (+ 2 i2) N2)), 33558#(or (<= N2 (+ i2 11)) (<= (+ i2 13) N2)), 33554#(or (<= (+ 9 i2) N2) (<= N2 (+ 7 i2))), 33561#(or (<= N2 (+ 14 i2)) (<= (+ 16 i2) N2)), 33557#(or (<= N2 (+ i2 10)) (<= (+ i2 12) N2)), 33551#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 33555#(or (<= (+ i2 10) N2) (<= N2 (+ i2 8)))] [2022-03-15 21:31:02,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-15 21:31:02,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:31:02,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-15 21:31:02,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2623, Invalid=15467, Unknown=0, NotChecked=0, Total=18090 [2022-03-15 21:31:02,243 INFO L87 Difference]: Start difference. First operand 248 states and 562 transitions. Second operand has 60 states, 60 states have (on average 2.033333333333333) internal successors, (122), 59 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:04,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:31:04,373 INFO L93 Difference]: Finished difference Result 422 states and 831 transitions. [2022-03-15 21:31:04,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-15 21:31:04,373 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.033333333333333) internal successors, (122), 59 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-03-15 21:31:04,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:31:04,375 INFO L225 Difference]: With dead ends: 422 [2022-03-15 21:31:04,375 INFO L226 Difference]: Without dead ends: 352 [2022-03-15 21:31:04,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 33 SyntacticMatches, 20 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12283 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=7222, Invalid=29068, Unknown=0, NotChecked=0, Total=36290 [2022-03-15 21:31:04,377 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 405 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 1259 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:31:04,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 0 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1259 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:31:04,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-03-15 21:31:04,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 145. [2022-03-15 21:31:04,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.111111111111111) internal successors, (304), 144 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:04,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 304 transitions. [2022-03-15 21:31:04,381 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 304 transitions. Word has length 45 [2022-03-15 21:31:04,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:31:04,381 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 304 transitions. [2022-03-15 21:31:04,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.033333333333333) internal successors, (122), 59 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:04,381 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 304 transitions. [2022-03-15 21:31:04,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-15 21:31:04,382 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:31:04,382 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:31:04,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-15 21:31:04,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:04,583 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:31:04,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:31:04,584 INFO L85 PathProgramCache]: Analyzing trace with hash 202286314, now seen corresponding path program 54 times [2022-03-15 21:31:04,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:31:04,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881315638] [2022-03-15 21:31:04,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:31:04,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:31:04,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:04,958 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 172 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:31:04,958 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:31:04,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881315638] [2022-03-15 21:31:04,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881315638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:31:04,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377890988] [2022-03-15 21:31:04,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:31:04,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:04,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:31:04,964 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:31:04,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-15 21:31:05,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-15 21:31:05,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:31:05,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 21:31:05,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:31:06,142 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 172 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:31:06,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:31:07,351 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:31:07,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377890988] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:31:07,351 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:31:07,351 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 39, 39] total 96 [2022-03-15 21:31:07,351 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [619470930] [2022-03-15 21:31:07,351 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:31:07,355 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:31:07,377 INFO L252 McrAutomatonBuilder]: Finished intersection with 67 states and 87 transitions. [2022-03-15 21:31:07,377 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:31:07,681 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [34751#(< i2 N2)] [2022-03-15 21:31:07,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:31:07,681 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:31:07,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:31:07,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2224, Invalid=7282, Unknown=0, NotChecked=0, Total=9506 [2022-03-15 21:31:07,682 INFO L87 Difference]: Start difference. First operand 145 states and 304 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:08,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:31:08,956 INFO L93 Difference]: Finished difference Result 272 states and 534 transitions. [2022-03-15 21:31:08,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-15 21:31:08,957 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-03-15 21:31:08,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:31:08,958 INFO L225 Difference]: With dead ends: 272 [2022-03-15 21:31:08,958 INFO L226 Difference]: Without dead ends: 271 [2022-03-15 21:31:08,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 34 SyntacticMatches, 18 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7792 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5480, Invalid=17472, Unknown=0, NotChecked=0, Total=22952 [2022-03-15 21:31:08,960 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 129 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:31:08,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 0 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:31:08,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-03-15 21:31:08,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 127. [2022-03-15 21:31:08,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.126984126984127) internal successors, (268), 126 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:08,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 268 transitions. [2022-03-15 21:31:08,963 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 268 transitions. Word has length 45 [2022-03-15 21:31:08,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:31:08,963 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 268 transitions. [2022-03-15 21:31:08,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:08,963 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 268 transitions. [2022-03-15 21:31:08,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-15 21:31:08,964 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:31:08,964 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:31:08,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-15 21:31:09,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:09,183 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:31:09,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:31:09,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1750074566, now seen corresponding path program 55 times [2022-03-15 21:31:09,185 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:31:09,185 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713703286] [2022-03-15 21:31:09,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:31:09,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:31:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:09,566 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 379 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:31:09,566 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:31:09,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713703286] [2022-03-15 21:31:09,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713703286] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:31:09,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716869039] [2022-03-15 21:31:09,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:31:09,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:09,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:31:09,567 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:31:09,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-15 21:31:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:09,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-15 21:31:09,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:31:09,786 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 379 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:31:09,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:31:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 379 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:31:09,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716869039] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:31:09,939 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:31:09,939 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 20 [2022-03-15 21:31:09,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [379136525] [2022-03-15 21:31:09,939 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:31:09,944 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:31:09,979 INFO L252 McrAutomatonBuilder]: Finished intersection with 107 states and 166 transitions. [2022-03-15 21:31:09,980 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:31:11,712 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 19 new interpolants: [35690#(and (or (<= counter 0) (<= counter (* C 13))) (or (<= counter (* C 12)) (<= (* C 13) counter))), 35692#(and (or (<= (* C 15) counter) (<= counter (* 14 C))) (or (<= counter 0) (<= counter (* C 15)))), 35689#(and (or (<= counter (* C 11)) (<= (* C 12) counter)) (or (<= counter (* C 12)) (<= counter 0))), 35686#(and (or (<= (* 9 C) counter) (<= counter (* C 8))) (or (<= counter 0) (<= counter (* 9 C)))), 35688#(and (or (<= counter (* C 10)) (<= (* C 11) counter)) (or (<= counter 0) (<= counter (* C 11)))), 35691#(and (or (<= (* 14 C) counter) (<= counter (* C 13))) (or (<= counter 0) (<= counter (* 14 C)))), 35683#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C)))), 35693#(and (or (<= counter 0) (<= counter (* 16 C))) (or (<= (* 16 C) counter) (<= counter (* C 15)))), 35680#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 35694#(and (or (<= counter 0) (<= counter (* C 17))) (or (<= (* C 17) counter) (<= counter (* 16 C)))), 35684#(and (or (<= counter 0) (<= counter (* 7 C))) (or (<= counter (* 6 C)) (<= (* 7 C) counter))), 35695#(and (or (<= counter (* C 17)) (<= (* C 18) counter)) (or (<= counter 0) (<= counter (* C 18)))), 35682#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter))), 35681#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter))), 35696#(and (or (<= counter (* 19 C)) (<= counter 0)) (or (<= (* 19 C) counter) (<= counter (* C 18)))), 35687#(and (or (<= (* C 10) counter) (<= counter (* 9 C))) (or (<= counter (* C 10)) (<= counter 0))), 35685#(and (or (<= counter 0) (<= counter (* C 8))) (or (<= (* C 8) counter) (<= counter (* 7 C)))), 35678#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 35679#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter)))] [2022-03-15 21:31:11,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 21:31:11,713 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:31:11,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 21:31:11,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=1181, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:31:11,713 INFO L87 Difference]: Start difference. First operand 127 states and 268 transitions. Second operand has 41 states, 40 states have (on average 3.075) internal successors, (123), 40 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:12,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:31:12,565 INFO L93 Difference]: Finished difference Result 401 states and 775 transitions. [2022-03-15 21:31:12,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 21:31:12,565 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 3.075) internal successors, (123), 40 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-03-15 21:31:12,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:31:12,566 INFO L225 Difference]: With dead ends: 401 [2022-03-15 21:31:12,566 INFO L226 Difference]: Without dead ends: 357 [2022-03-15 21:31:12,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 147 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=459, Invalid=1181, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:31:12,567 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 352 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 2311 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 21:31:12,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 0 Invalid, 2397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2311 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 21:31:12,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-03-15 21:31:12,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 261. [2022-03-15 21:31:12,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.276923076923077) internal successors, (592), 260 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:12,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 592 transitions. [2022-03-15 21:31:12,573 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 592 transitions. Word has length 46 [2022-03-15 21:31:12,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:31:12,573 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 592 transitions. [2022-03-15 21:31:12,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 3.075) internal successors, (123), 40 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:12,574 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 592 transitions. [2022-03-15 21:31:12,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-15 21:31:12,574 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:31:12,574 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:31:12,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-15 21:31:12,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:12,791 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:31:12,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:31:12,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1747084032, now seen corresponding path program 56 times [2022-03-15 21:31:12,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:31:12,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946737629] [2022-03-15 21:31:12,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:31:12,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:31:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:13,509 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 190 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:31:13,509 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:31:13,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946737629] [2022-03-15 21:31:13,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946737629] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:31:13,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458596548] [2022-03-15 21:31:13,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:31:13,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:13,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:31:13,511 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:31:13,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-15 21:31:13,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:31:13,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:31:13,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-15 21:31:13,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:31:14,901 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 190 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:31:14,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:31:16,352 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 190 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:31:16,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458596548] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:31:16,352 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:31:16,352 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 121 [2022-03-15 21:31:16,352 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1509377253] [2022-03-15 21:31:16,352 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:31:16,358 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:31:16,404 INFO L252 McrAutomatonBuilder]: Finished intersection with 109 states and 169 transitions. [2022-03-15 21:31:16,404 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:31:18,056 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 20 new interpolants: [37032#(or (<= N2 (+ 14 i2)) (<= (+ 16 i2) N2)), 37024#(or (<= N2 (+ 6 i2)) (<= (+ i2 8) N2)), 37037#(< i1 N1), 37030#(or (<= N2 (+ i2 12)) (<= (+ 14 i2) N2)), 37025#(or (<= (+ 9 i2) N2) (<= N2 (+ 7 i2))), 37026#(or (<= (+ i2 10) N2) (<= N2 (+ i2 8))), 37031#(or (<= (+ i2 15) N2) (<= N2 (+ i2 13))), 37027#(or (<= (+ i2 11) N2) (<= N2 (+ 9 i2))), 37020#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2))), 37021#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 37023#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2))), 37035#(or (<= N2 (+ i2 17)) (<= (+ 19 i2) N2)), 37028#(or (<= N2 (+ i2 10)) (<= (+ i2 12) N2)), 37018#(or (<= N2 i2) (<= (+ 2 i2) N2)), 37036#(or (<= (+ i2 20) N2) (<= N2 (+ i2 18))), 37033#(or (<= N2 (+ i2 15)) (<= (+ i2 17) N2)), 37029#(or (<= N2 (+ i2 11)) (<= (+ i2 13) N2)), 37022#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 37019#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 37034#(or (<= N2 (+ 16 i2)) (<= (+ i2 18) N2))] [2022-03-15 21:31:18,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-15 21:31:18,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:31:18,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-15 21:31:18,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2891, Invalid=17131, Unknown=0, NotChecked=0, Total=20022 [2022-03-15 21:31:18,057 INFO L87 Difference]: Start difference. First operand 261 states and 592 transitions. Second operand has 63 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 62 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:20,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:31:20,412 INFO L93 Difference]: Finished difference Result 444 states and 875 transitions. [2022-03-15 21:31:20,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-15 21:31:20,412 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 62 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-15 21:31:20,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:31:20,414 INFO L225 Difference]: With dead ends: 444 [2022-03-15 21:31:20,414 INFO L226 Difference]: Without dead ends: 370 [2022-03-15 21:31:20,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 34 SyntacticMatches, 21 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13639 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=7992, Invalid=32208, Unknown=0, NotChecked=0, Total=40200 [2022-03-15 21:31:20,417 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 438 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:31:20,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 0 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1382 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:31:20,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-03-15 21:31:20,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 152. [2022-03-15 21:31:20,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.1125827814569536) internal successors, (319), 151 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:20,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 319 transitions. [2022-03-15 21:31:20,420 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 319 transitions. Word has length 47 [2022-03-15 21:31:20,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:31:20,420 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 319 transitions. [2022-03-15 21:31:20,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 62 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:20,421 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 319 transitions. [2022-03-15 21:31:20,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-15 21:31:20,421 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:31:20,421 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:31:20,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-15 21:31:20,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-15 21:31:20,639 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:31:20,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:31:20,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1466019924, now seen corresponding path program 57 times [2022-03-15 21:31:20,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:31:20,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390871068] [2022-03-15 21:31:20,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:31:20,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:31:20,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:20,994 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 191 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:31:20,994 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:31:20,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390871068] [2022-03-15 21:31:20,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390871068] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:31:20,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665570648] [2022-03-15 21:31:20,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:31:20,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:20,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:31:20,996 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:31:20,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-15 21:31:21,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-03-15 21:31:21,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:31:21,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-15 21:31:21,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:31:22,153 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 191 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:31:22,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:31:23,480 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:31:23,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665570648] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:31:23,480 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:31:23,480 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 41, 41] total 101 [2022-03-15 21:31:23,480 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1330837433] [2022-03-15 21:31:23,480 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:31:23,484 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:31:23,508 INFO L252 McrAutomatonBuilder]: Finished intersection with 70 states and 91 transitions. [2022-03-15 21:31:23,508 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:31:23,835 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [38282#(< i2 N2)] [2022-03-15 21:31:23,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:31:23,835 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:31:23,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:31:23,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2451, Invalid=8055, Unknown=0, NotChecked=0, Total=10506 [2022-03-15 21:31:23,836 INFO L87 Difference]: Start difference. First operand 152 states and 319 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:25,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:31:25,215 INFO L93 Difference]: Finished difference Result 286 states and 562 transitions. [2022-03-15 21:31:25,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-15 21:31:25,215 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-15 21:31:25,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:31:25,216 INFO L225 Difference]: With dead ends: 286 [2022-03-15 21:31:25,216 INFO L226 Difference]: Without dead ends: 285 [2022-03-15 21:31:25,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 35 SyntacticMatches, 19 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8671 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=6059, Invalid=19381, Unknown=0, NotChecked=0, Total=25440 [2022-03-15 21:31:25,218 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 130 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:31:25,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 0 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:31:25,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-03-15 21:31:25,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 133. [2022-03-15 21:31:25,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.128787878787879) internal successors, (281), 132 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:25,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 281 transitions. [2022-03-15 21:31:25,220 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 281 transitions. Word has length 47 [2022-03-15 21:31:25,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:31:25,221 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 281 transitions. [2022-03-15 21:31:25,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:25,221 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 281 transitions. [2022-03-15 21:31:25,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-15 21:31:25,221 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:31:25,221 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:31:25,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-15 21:31:25,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-15 21:31:25,423 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:31:25,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:31:25,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1650697736, now seen corresponding path program 58 times [2022-03-15 21:31:25,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:31:25,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751470928] [2022-03-15 21:31:25,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:31:25,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:31:25,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 419 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:31:25,830 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:31:25,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751470928] [2022-03-15 21:31:25,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751470928] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:31:25,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890585231] [2022-03-15 21:31:25,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:31:25,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:25,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:31:25,840 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:31:25,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-15 21:31:25,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:31:25,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:31:25,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-15 21:31:25,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:31:26,122 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 419 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:31:26,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:31:26,321 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 419 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:31:26,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890585231] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:31:26,321 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:31:26,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 21 [2022-03-15 21:31:26,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2088399931] [2022-03-15 21:31:26,321 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:31:26,327 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:31:26,375 INFO L252 McrAutomatonBuilder]: Finished intersection with 112 states and 174 transitions. [2022-03-15 21:31:26,375 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:31:28,256 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 20 new interpolants: [39261#(and (or (<= counter 0) (<= counter (* C 8))) (or (<= (* C 8) counter) (<= counter (* 7 C)))), 39266#(and (or (<= counter 0) (<= counter (* C 13))) (or (<= counter (* C 12)) (<= (* C 13) counter))), 39260#(and (or (<= counter 0) (<= counter (* 7 C))) (or (<= counter (* 6 C)) (<= (* 7 C) counter))), 39269#(and (or (<= counter 0) (<= counter (* 16 C))) (or (<= (* 16 C) counter) (<= counter (* C 15)))), 39270#(and (or (<= counter 0) (<= counter (* C 17))) (or (<= (* C 17) counter) (<= counter (* 16 C)))), 39267#(and (or (<= (* 14 C) counter) (<= counter (* C 13))) (or (<= counter 0) (<= counter (* 14 C)))), 39258#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter))), 39271#(and (or (<= counter (* C 17)) (<= (* C 18) counter)) (or (<= counter 0) (<= counter (* C 18)))), 39273#(and (or (<= counter 0) (<= counter (* C 20))) (or (<= (* C 20) counter) (<= counter (* 19 C)))), 39262#(and (or (<= (* 9 C) counter) (<= counter (* C 8))) (or (<= counter 0) (<= counter (* 9 C)))), 39263#(and (or (<= (* C 10) counter) (<= counter (* 9 C))) (or (<= counter (* C 10)) (<= counter 0))), 39265#(and (or (<= counter (* C 11)) (<= (* C 12) counter)) (or (<= counter (* C 12)) (<= counter 0))), 39272#(and (or (<= counter (* 19 C)) (<= counter 0)) (or (<= (* 19 C) counter) (<= counter (* C 18)))), 39264#(and (or (<= counter (* C 10)) (<= (* C 11) counter)) (or (<= counter 0) (<= counter (* C 11)))), 39257#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter))), 39268#(and (or (<= (* C 15) counter) (<= counter (* 14 C))) (or (<= counter 0) (<= counter (* C 15)))), 39259#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C)))), 39256#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 39254#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 39255#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter)))] [2022-03-15 21:31:28,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 21:31:28,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:31:28,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 21:31:28,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=1303, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:31:28,257 INFO L87 Difference]: Start difference. First operand 133 states and 281 transitions. Second operand has 43 states, 42 states have (on average 3.0714285714285716) internal successors, (129), 42 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:29,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:31:29,143 INFO L93 Difference]: Finished difference Result 421 states and 814 transitions. [2022-03-15 21:31:29,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:31:29,144 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 3.0714285714285716) internal successors, (129), 42 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-03-15 21:31:29,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:31:29,145 INFO L225 Difference]: With dead ends: 421 [2022-03-15 21:31:29,145 INFO L226 Difference]: Without dead ends: 375 [2022-03-15 21:31:29,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 154 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=503, Invalid=1303, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:31:29,147 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 325 mSDsluCounter, 1480 mSDsCounter, 0 mSdLazyCounter, 2504 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 21:31:29,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 0 Invalid, 2581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2504 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 21:31:29,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-03-15 21:31:29,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 274. [2022-03-15 21:31:29,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.2783882783882783) internal successors, (622), 273 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:29,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 622 transitions. [2022-03-15 21:31:29,153 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 622 transitions. Word has length 48 [2022-03-15 21:31:29,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:31:29,153 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 622 transitions. [2022-03-15 21:31:29,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 3.0714285714285716) internal successors, (129), 42 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:29,153 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 622 transitions. [2022-03-15 21:31:29,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-15 21:31:29,154 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:31:29,154 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:31:29,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-15 21:31:29,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:29,367 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:31:29,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:31:29,368 INFO L85 PathProgramCache]: Analyzing trace with hash -454289470, now seen corresponding path program 59 times [2022-03-15 21:31:29,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:31:29,369 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887079186] [2022-03-15 21:31:29,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:31:29,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:31:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:30,137 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 210 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:31:30,137 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:31:30,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887079186] [2022-03-15 21:31:30,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887079186] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:31:30,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972722287] [2022-03-15 21:31:30,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:31:30,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:30,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:31:30,140 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:31:30,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-15 21:31:30,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-15 21:31:30,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:31:30,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 21:31:30,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:31:31,638 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 210 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:31:31,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:31:33,229 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 210 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:31:33,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972722287] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:31:33,229 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:31:33,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 127 [2022-03-15 21:31:33,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [794581783] [2022-03-15 21:31:33,230 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:31:33,237 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:31:33,303 INFO L252 McrAutomatonBuilder]: Finished intersection with 114 states and 177 transitions. [2022-03-15 21:31:33,304 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:31:35,061 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 21 new interpolants: [40668#(or (<= (+ i2 10) N2) (<= N2 (+ i2 8))), 40678#(or (<= (+ i2 20) N2) (<= N2 (+ i2 18))), 40663#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 40660#(or (<= N2 i2) (<= (+ 2 i2) N2)), 40672#(or (<= N2 (+ i2 12)) (<= (+ 14 i2) N2)), 40673#(or (<= (+ i2 15) N2) (<= N2 (+ i2 13))), 40671#(or (<= N2 (+ i2 11)) (<= (+ i2 13) N2)), 40676#(or (<= N2 (+ 16 i2)) (<= (+ i2 18) N2)), 40665#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2))), 40659#(< i1 N1), 40662#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2))), 40677#(or (<= N2 (+ i2 17)) (<= (+ 19 i2) N2)), 40679#(or (<= N2 (+ 19 i2)) (<= (+ 21 i2) N2)), 40667#(or (<= (+ 9 i2) N2) (<= N2 (+ 7 i2))), 40670#(or (<= N2 (+ i2 10)) (<= (+ i2 12) N2)), 40661#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 40666#(or (<= N2 (+ 6 i2)) (<= (+ i2 8) N2)), 40675#(or (<= N2 (+ i2 15)) (<= (+ i2 17) N2)), 40669#(or (<= (+ i2 11) N2) (<= N2 (+ 9 i2))), 40664#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 40674#(or (<= N2 (+ 14 i2)) (<= (+ 16 i2) N2))] [2022-03-15 21:31:35,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-15 21:31:35,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:31:35,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-15 21:31:35,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3172, Invalid=18880, Unknown=0, NotChecked=0, Total=22052 [2022-03-15 21:31:35,063 INFO L87 Difference]: Start difference. First operand 274 states and 622 transitions. Second operand has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 65 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:37,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:31:37,615 INFO L93 Difference]: Finished difference Result 466 states and 919 transitions. [2022-03-15 21:31:37,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-15 21:31:37,615 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 65 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-03-15 21:31:37,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:31:37,616 INFO L225 Difference]: With dead ends: 466 [2022-03-15 21:31:37,616 INFO L226 Difference]: Without dead ends: 388 [2022-03-15 21:31:37,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 35 SyntacticMatches, 22 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15046 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=8801, Invalid=35509, Unknown=0, NotChecked=0, Total=44310 [2022-03-15 21:31:37,619 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 506 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 1439 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:31:37,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 0 Invalid, 1559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1439 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:31:37,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-03-15 21:31:37,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 159. [2022-03-15 21:31:37,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.1139240506329116) internal successors, (334), 158 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:37,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 334 transitions. [2022-03-15 21:31:37,623 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 334 transitions. Word has length 49 [2022-03-15 21:31:37,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:31:37,623 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 334 transitions. [2022-03-15 21:31:37,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 65 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:37,623 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 334 transitions. [2022-03-15 21:31:37,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-15 21:31:37,623 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:31:37,624 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:31:37,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-15 21:31:37,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:37,833 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:31:37,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:31:37,833 INFO L85 PathProgramCache]: Analyzing trace with hash -251734358, now seen corresponding path program 60 times [2022-03-15 21:31:37,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:31:37,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998937934] [2022-03-15 21:31:37,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:31:37,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:31:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:38,200 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 211 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:31:38,200 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:31:38,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998937934] [2022-03-15 21:31:38,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998937934] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:31:38,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610619667] [2022-03-15 21:31:38,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:31:38,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:38,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:31:38,202 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:31:38,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-15 21:31:38,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-15 21:31:38,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:31:38,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 21:31:38,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:31:39,525 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 211 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:31:39,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:31:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:31:40,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610619667] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:31:40,970 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:31:40,971 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 43, 43] total 106 [2022-03-15 21:31:40,971 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [740713078] [2022-03-15 21:31:40,971 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:31:40,975 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:31:41,003 INFO L252 McrAutomatonBuilder]: Finished intersection with 73 states and 95 transitions. [2022-03-15 21:31:41,003 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:31:41,378 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [41983#(< i2 N2)] [2022-03-15 21:31:41,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:31:41,378 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:31:41,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:31:41,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2689, Invalid=8867, Unknown=0, NotChecked=0, Total=11556 [2022-03-15 21:31:41,379 INFO L87 Difference]: Start difference. First operand 159 states and 334 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:42,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:31:42,888 INFO L93 Difference]: Finished difference Result 300 states and 590 transitions. [2022-03-15 21:31:42,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-15 21:31:42,888 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-03-15 21:31:42,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:31:42,889 INFO L225 Difference]: With dead ends: 300 [2022-03-15 21:31:42,889 INFO L226 Difference]: Without dead ends: 299 [2022-03-15 21:31:42,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 36 SyntacticMatches, 20 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9597 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=6667, Invalid=21389, Unknown=0, NotChecked=0, Total=28056 [2022-03-15 21:31:42,891 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 165 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:31:42,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 0 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:31:42,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-03-15 21:31:42,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 139. [2022-03-15 21:31:42,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.130434782608696) internal successors, (294), 138 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:42,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 294 transitions. [2022-03-15 21:31:42,894 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 294 transitions. Word has length 49 [2022-03-15 21:31:42,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:31:42,894 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 294 transitions. [2022-03-15 21:31:42,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:42,894 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 294 transitions. [2022-03-15 21:31:42,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-15 21:31:42,895 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:31:42,895 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:31:42,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-15 21:31:43,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:43,099 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:31:43,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:31:43,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1222343802, now seen corresponding path program 61 times [2022-03-15 21:31:43,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:31:43,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818432457] [2022-03-15 21:31:43,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:31:43,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:31:43,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 461 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:31:43,551 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:31:43,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818432457] [2022-03-15 21:31:43,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818432457] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:31:43,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486526447] [2022-03-15 21:31:43,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:31:43,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:43,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:31:43,556 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:31:43,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-15 21:31:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:43,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-15 21:31:43,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:31:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 461 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:31:43,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:31:43,941 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 461 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:31:43,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486526447] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:31:43,942 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:31:43,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 22 [2022-03-15 21:31:43,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1365443674] [2022-03-15 21:31:43,942 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:31:43,947 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:31:44,009 INFO L252 McrAutomatonBuilder]: Finished intersection with 117 states and 182 transitions. [2022-03-15 21:31:44,009 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:31:45,897 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 21 new interpolants: [43004#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter))), 43001#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 43013#(and (or (<= (* 14 C) counter) (<= counter (* C 13))) (or (<= counter 0) (<= counter (* 14 C)))), 43015#(and (or (<= counter 0) (<= counter (* 16 C))) (or (<= (* 16 C) counter) (<= counter (* C 15)))), 43018#(and (or (<= counter (* 19 C)) (<= counter 0)) (or (<= (* 19 C) counter) (<= counter (* C 18)))), 43009#(and (or (<= (* C 10) counter) (<= counter (* 9 C))) (or (<= counter (* C 10)) (<= counter 0))), 43007#(and (or (<= counter 0) (<= counter (* C 8))) (or (<= (* C 8) counter) (<= counter (* 7 C)))), 43019#(and (or (<= counter 0) (<= counter (* C 20))) (or (<= (* C 20) counter) (<= counter (* 19 C)))), 43014#(and (or (<= (* C 15) counter) (<= counter (* 14 C))) (or (<= counter 0) (<= counter (* C 15)))), 43020#(and (or (<= counter 0) (<= counter (* 21 C))) (or (<= (* 21 C) counter) (<= counter (* C 20)))), 43017#(and (or (<= counter (* C 17)) (<= (* C 18) counter)) (or (<= counter 0) (<= counter (* C 18)))), 43016#(and (or (<= counter 0) (<= counter (* C 17))) (or (<= (* C 17) counter) (<= counter (* 16 C)))), 43002#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 43006#(and (or (<= counter 0) (<= counter (* 7 C))) (or (<= counter (* 6 C)) (<= (* 7 C) counter))), 43000#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 43012#(and (or (<= counter 0) (<= counter (* C 13))) (or (<= counter (* C 12)) (<= (* C 13) counter))), 43008#(and (or (<= (* 9 C) counter) (<= counter (* C 8))) (or (<= counter 0) (<= counter (* 9 C)))), 43003#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter))), 43010#(and (or (<= counter (* C 10)) (<= (* C 11) counter)) (or (<= counter 0) (<= counter (* C 11)))), 43011#(and (or (<= counter (* C 11)) (<= (* C 12) counter)) (or (<= counter (* C 12)) (<= counter 0))), 43005#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C))))] [2022-03-15 21:31:45,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 21:31:45,897 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:31:45,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 21:31:45,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=1431, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:31:45,898 INFO L87 Difference]: Start difference. First operand 139 states and 294 transitions. Second operand has 45 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 44 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:46,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:31:46,881 INFO L93 Difference]: Finished difference Result 441 states and 853 transitions. [2022-03-15 21:31:46,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 21:31:46,881 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 44 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-03-15 21:31:46,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:31:46,883 INFO L225 Difference]: With dead ends: 441 [2022-03-15 21:31:46,883 INFO L226 Difference]: Without dead ends: 393 [2022-03-15 21:31:46,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 161 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=549, Invalid=1431, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:31:46,883 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 293 mSDsluCounter, 1633 mSDsCounter, 0 mSdLazyCounter, 2759 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 21:31:46,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 0 Invalid, 2831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2759 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 21:31:46,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-03-15 21:31:46,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 287. [2022-03-15 21:31:46,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.2797202797202796) internal successors, (652), 286 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:46,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 652 transitions. [2022-03-15 21:31:46,888 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 652 transitions. Word has length 50 [2022-03-15 21:31:46,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:31:46,888 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 652 transitions. [2022-03-15 21:31:46,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 44 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:46,889 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 652 transitions. [2022-03-15 21:31:46,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-15 21:31:46,889 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:31:46,889 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:31:46,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-15 21:31:47,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:47,112 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:31:47,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:31:47,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1185452352, now seen corresponding path program 62 times [2022-03-15 21:31:47,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:31:47,113 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879235428] [2022-03-15 21:31:47,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:31:47,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:31:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:47,968 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 231 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:31:47,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:31:47,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879235428] [2022-03-15 21:31:47,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879235428] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:31:47,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584859761] [2022-03-15 21:31:47,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:31:47,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:47,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:31:47,971 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:31:47,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-15 21:31:48,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:31:48,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:31:48,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 21:31:48,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:31:49,597 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 231 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:31:49,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:31:51,317 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 231 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:31:51,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584859761] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:31:51,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:31:51,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 133 [2022-03-15 21:31:51,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [598288191] [2022-03-15 21:31:51,318 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:31:51,326 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:31:51,407 INFO L252 McrAutomatonBuilder]: Finished intersection with 119 states and 185 transitions. [2022-03-15 21:31:51,407 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:31:53,286 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 22 new interpolants: [44478#(or (<= (+ i2 10) N2) (<= N2 (+ i2 8))), 44474#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 44484#(or (<= N2 (+ 14 i2)) (<= (+ 16 i2) N2)), 44482#(or (<= N2 (+ i2 12)) (<= (+ 14 i2) N2)), 44489#(or (<= N2 (+ 19 i2)) (<= (+ 21 i2) N2)), 44487#(or (<= N2 (+ i2 17)) (<= (+ 19 i2) N2)), 44477#(or (<= (+ 9 i2) N2) (<= N2 (+ 7 i2))), 44480#(or (<= N2 (+ i2 10)) (<= (+ i2 12) N2)), 44476#(or (<= N2 (+ 6 i2)) (<= (+ i2 8) N2)), 44488#(or (<= (+ i2 20) N2) (<= N2 (+ i2 18))), 44483#(or (<= (+ i2 15) N2) (<= N2 (+ i2 13))), 44479#(or (<= (+ i2 11) N2) (<= N2 (+ 9 i2))), 44472#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2))), 44485#(or (<= N2 (+ i2 15)) (<= (+ i2 17) N2)), 44473#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 44486#(or (<= N2 (+ 16 i2)) (<= (+ i2 18) N2)), 44490#(or (<= (+ 22 i2) N2) (<= N2 (+ i2 20))), 44491#(< i1 N1), 44470#(or (<= N2 i2) (<= (+ 2 i2) N2)), 44471#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 44481#(or (<= N2 (+ i2 11)) (<= (+ i2 13) N2)), 44475#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2)))] [2022-03-15 21:31:53,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-15 21:31:53,286 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:31:53,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-15 21:31:53,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3466, Invalid=20714, Unknown=0, NotChecked=0, Total=24180 [2022-03-15 21:31:53,288 INFO L87 Difference]: Start difference. First operand 287 states and 652 transitions. Second operand has 69 states, 69 states have (on average 2.028985507246377) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:56,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:31:56,020 INFO L93 Difference]: Finished difference Result 488 states and 963 transitions. [2022-03-15 21:31:56,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-15 21:31:56,020 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.028985507246377) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-03-15 21:31:56,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:31:56,021 INFO L225 Difference]: With dead ends: 488 [2022-03-15 21:31:56,021 INFO L226 Difference]: Without dead ends: 406 [2022-03-15 21:31:56,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 36 SyntacticMatches, 23 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16564 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=9649, Invalid=38971, Unknown=0, NotChecked=0, Total=48620 [2022-03-15 21:31:56,025 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 531 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 1494 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:31:56,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 0 Invalid, 1624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1494 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:31:56,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-03-15 21:31:56,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 166. [2022-03-15 21:31:56,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.1151515151515152) internal successors, (349), 165 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:56,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 349 transitions. [2022-03-15 21:31:56,029 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 349 transitions. Word has length 51 [2022-03-15 21:31:56,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:31:56,029 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 349 transitions. [2022-03-15 21:31:56,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.028985507246377) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:56,030 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 349 transitions. [2022-03-15 21:31:56,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-15 21:31:56,030 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:31:56,030 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:31:56,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-15 21:31:56,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-15 21:31:56,231 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:31:56,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:31:56,231 INFO L85 PathProgramCache]: Analyzing trace with hash 878291180, now seen corresponding path program 63 times [2022-03-15 21:31:56,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:31:56,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090254453] [2022-03-15 21:31:56,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:31:56,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:31:56,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:56,630 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 232 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:31:56,630 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:31:56,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090254453] [2022-03-15 21:31:56,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090254453] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:31:56,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775231179] [2022-03-15 21:31:56,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:31:56,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:56,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:31:56,632 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:31:56,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-15 21:31:56,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-03-15 21:31:56,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:31:56,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 21:31:56,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:31:57,975 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 232 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:31:57,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:31:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:31:59,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775231179] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:31:59,534 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:31:59,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 45, 45] total 111 [2022-03-15 21:31:59,535 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1957848607] [2022-03-15 21:31:59,535 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:31:59,540 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:31:59,589 INFO L252 McrAutomatonBuilder]: Finished intersection with 76 states and 99 transitions. [2022-03-15 21:31:59,589 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:31:59,954 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [45854#(< i2 N2)] [2022-03-15 21:31:59,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:31:59,954 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:31:59,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:31:59,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2938, Invalid=9718, Unknown=0, NotChecked=0, Total=12656 [2022-03-15 21:31:59,955 INFO L87 Difference]: Start difference. First operand 166 states and 349 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 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 21:32:01,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:01,594 INFO L93 Difference]: Finished difference Result 314 states and 618 transitions. [2022-03-15 21:32:01,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-15 21:32:01,595 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-03-15 21:32:01,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:01,596 INFO L225 Difference]: With dead ends: 314 [2022-03-15 21:32:01,596 INFO L226 Difference]: Without dead ends: 313 [2022-03-15 21:32:01,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 37 SyntacticMatches, 21 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10570 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=7304, Invalid=23496, Unknown=0, NotChecked=0, Total=30800 [2022-03-15 21:32:01,601 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 122 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:01,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 0 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:32:01,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-03-15 21:32:01,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 145. [2022-03-15 21:32:01,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1319444444444446) internal successors, (307), 144 states have internal predecessors, (307), 0 states have call successors, (0), 0 states 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 21:32:01,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 307 transitions. [2022-03-15 21:32:01,604 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 307 transitions. Word has length 51 [2022-03-15 21:32:01,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:01,604 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 307 transitions. [2022-03-15 21:32:01,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 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 21:32:01,605 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 307 transitions. [2022-03-15 21:32:01,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-15 21:32:01,605 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:01,605 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:01,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-15 21:32:01,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:01,823 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:01,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:01,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1881410632, now seen corresponding path program 64 times [2022-03-15 21:32:01,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:01,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660917488] [2022-03-15 21:32:01,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:01,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:01,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 505 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:02,247 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:02,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660917488] [2022-03-15 21:32:02,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660917488] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:02,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518344739] [2022-03-15 21:32:02,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:32:02,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:02,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:02,248 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:32:02,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-15 21:32:02,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:32:02,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:02,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-15 21:32:02,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:02,461 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 505 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:02,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:02,630 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 505 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:02,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518344739] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:02,630 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:02,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 23 [2022-03-15 21:32:02,630 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1976888888] [2022-03-15 21:32:02,630 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:02,636 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:02,684 INFO L252 McrAutomatonBuilder]: Finished intersection with 122 states and 190 transitions. [2022-03-15 21:32:02,684 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:04,673 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 22 new interpolants: [46932#(and (or (<= counter 0) (<= counter (* C 17))) (or (<= (* C 17) counter) (<= counter (* 16 C)))), 46925#(and (or (<= (* C 10) counter) (<= counter (* 9 C))) (or (<= counter (* C 10)) (<= counter 0))), 46935#(and (or (<= counter 0) (<= counter (* C 20))) (or (<= (* C 20) counter) (<= counter (* 19 C)))), 46923#(and (or (<= counter 0) (<= counter (* C 8))) (or (<= (* C 8) counter) (<= counter (* 7 C)))), 46934#(and (or (<= counter (* 19 C)) (<= counter 0)) (or (<= (* 19 C) counter) (<= counter (* C 18)))), 46918#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 46936#(and (or (<= counter 0) (<= counter (* 21 C))) (or (<= (* 21 C) counter) (<= counter (* C 20)))), 46937#(and (or (<= (* 22 C) counter) (<= counter (* 21 C))) (or (<= counter 0) (<= counter (* 22 C)))), 46930#(and (or (<= (* C 15) counter) (<= counter (* 14 C))) (or (<= counter 0) (<= counter (* C 15)))), 46927#(and (or (<= counter (* C 11)) (<= (* C 12) counter)) (or (<= counter (* C 12)) (<= counter 0))), 46929#(and (or (<= (* 14 C) counter) (<= counter (* C 13))) (or (<= counter 0) (<= counter (* 14 C)))), 46926#(and (or (<= counter (* C 10)) (<= (* C 11) counter)) (or (<= counter 0) (<= counter (* C 11)))), 46917#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 46924#(and (or (<= (* 9 C) counter) (<= counter (* C 8))) (or (<= counter 0) (<= counter (* 9 C)))), 46922#(and (or (<= counter 0) (<= counter (* 7 C))) (or (<= counter (* 6 C)) (<= (* 7 C) counter))), 46931#(and (or (<= counter 0) (<= counter (* 16 C))) (or (<= (* 16 C) counter) (<= counter (* C 15)))), 46921#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C)))), 46933#(and (or (<= counter (* C 17)) (<= (* C 18) counter)) (or (<= counter 0) (<= counter (* C 18)))), 46919#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter))), 46928#(and (or (<= counter 0) (<= counter (* C 13))) (or (<= counter (* C 12)) (<= (* C 13) counter))), 46920#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter))), 46916#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter)))] [2022-03-15 21:32:04,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 21:32:04,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:04,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 21:32:04,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=1565, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:32:04,673 INFO L87 Difference]: Start difference. First operand 145 states and 307 transitions. Second operand has 47 states, 46 states have (on average 3.0652173913043477) internal successors, (141), 46 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 21:32:05,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:05,749 INFO L93 Difference]: Finished difference Result 461 states and 892 transitions. [2022-03-15 21:32:05,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 21:32:05,749 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 3.0652173913043477) internal successors, (141), 46 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-03-15 21:32:05,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:05,750 INFO L225 Difference]: With dead ends: 461 [2022-03-15 21:32:05,750 INFO L226 Difference]: Without dead ends: 411 [2022-03-15 21:32:05,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 168 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=597, Invalid=1565, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:32:05,750 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 396 mSDsluCounter, 1828 mSDsCounter, 0 mSdLazyCounter, 3077 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 3077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:05,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 0 Invalid, 3177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 3077 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 21:32:05,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-03-15 21:32:05,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 300. [2022-03-15 21:32:05,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.280936454849498) internal successors, (682), 299 states have internal predecessors, (682), 0 states have call successors, (0), 0 states 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 21:32:05,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 682 transitions. [2022-03-15 21:32:05,755 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 682 transitions. Word has length 52 [2022-03-15 21:32:05,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:05,755 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 682 transitions. [2022-03-15 21:32:05,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 3.0652173913043477) internal successors, (141), 46 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 21:32:05,755 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 682 transitions. [2022-03-15 21:32:05,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-15 21:32:05,756 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:05,756 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:05,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-15 21:32:05,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-15 21:32:05,971 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:05,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:05,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1320611582, now seen corresponding path program 65 times [2022-03-15 21:32:05,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:05,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720467690] [2022-03-15 21:32:05,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:05,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:05,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:06,887 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 253 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:06,887 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:06,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720467690] [2022-03-15 21:32:06,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720467690] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:06,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550218720] [2022-03-15 21:32:06,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:32:06,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:06,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:06,888 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:32:06,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-15 21:32:06,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-03-15 21:32:06,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:06,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 21:32:06,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:08,663 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 253 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:08,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:10,553 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 253 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:10,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550218720] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:10,553 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:10,553 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 139 [2022-03-15 21:32:10,553 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1584005199] [2022-03-15 21:32:10,553 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:10,559 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:10,611 INFO L252 McrAutomatonBuilder]: Finished intersection with 124 states and 193 transitions. [2022-03-15 21:32:10,612 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:12,630 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 23 new interpolants: [48459#(or (<= (+ i2 10) N2) (<= N2 (+ i2 8))), 48458#(or (<= (+ 9 i2) N2) (<= N2 (+ 7 i2))), 48465#(or (<= N2 (+ 14 i2)) (<= (+ 16 i2) N2)), 48468#(or (<= N2 (+ i2 17)) (<= (+ 19 i2) N2)), 48467#(or (<= N2 (+ 16 i2)) (<= (+ i2 18) N2)), 48472#(or (<= (+ 23 i2) N2) (<= N2 (+ 21 i2))), 48473#(< i1 N1), 48455#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 48463#(or (<= N2 (+ i2 12)) (<= (+ 14 i2) N2)), 48451#(or (<= N2 i2) (<= (+ 2 i2) N2)), 48456#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2))), 48457#(or (<= N2 (+ 6 i2)) (<= (+ i2 8) N2)), 48454#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 48471#(or (<= (+ 22 i2) N2) (<= N2 (+ i2 20))), 48462#(or (<= N2 (+ i2 11)) (<= (+ i2 13) N2)), 48460#(or (<= (+ i2 11) N2) (<= N2 (+ 9 i2))), 48452#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 48461#(or (<= N2 (+ i2 10)) (<= (+ i2 12) N2)), 48469#(or (<= (+ i2 20) N2) (<= N2 (+ i2 18))), 48470#(or (<= N2 (+ 19 i2)) (<= (+ 21 i2) N2)), 48466#(or (<= N2 (+ i2 15)) (<= (+ i2 17) N2)), 48453#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2))), 48464#(or (<= (+ i2 15) N2) (<= N2 (+ i2 13)))] [2022-03-15 21:32:12,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-15 21:32:12,630 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:12,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-15 21:32:12,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3773, Invalid=22633, Unknown=0, NotChecked=0, Total=26406 [2022-03-15 21:32:12,632 INFO L87 Difference]: Start difference. First operand 300 states and 682 transitions. Second operand has 72 states, 72 states have (on average 2.0277777777777777) internal successors, (146), 71 states have internal predecessors, (146), 0 states have call successors, (0), 0 states 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 21:32:15,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:15,641 INFO L93 Difference]: Finished difference Result 510 states and 1007 transitions. [2022-03-15 21:32:15,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-15 21:32:15,641 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0277777777777777) internal successors, (146), 71 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-03-15 21:32:15,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:15,642 INFO L225 Difference]: With dead ends: 510 [2022-03-15 21:32:15,642 INFO L226 Difference]: Without dead ends: 424 [2022-03-15 21:32:15,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 37 SyntacticMatches, 24 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18133 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=10536, Invalid=42594, Unknown=0, NotChecked=0, Total=53130 [2022-03-15 21:32:15,644 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 435 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1770 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:15,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 0 Invalid, 1897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1770 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 21:32:15,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-03-15 21:32:15,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 173. [2022-03-15 21:32:15,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.116279069767442) internal successors, (364), 172 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 21:32:15,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 364 transitions. [2022-03-15 21:32:15,647 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 364 transitions. Word has length 53 [2022-03-15 21:32:15,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:15,647 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 364 transitions. [2022-03-15 21:32:15,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0277777777777777) internal successors, (146), 71 states have internal predecessors, (146), 0 states have call successors, (0), 0 states 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 21:32:15,647 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 364 transitions. [2022-03-15 21:32:15,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-15 21:32:15,648 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:15,648 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:15,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-15 21:32:15,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-15 21:32:15,848 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:15,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:15,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1689569174, now seen corresponding path program 66 times [2022-03-15 21:32:15,849 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:15,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609000251] [2022-03-15 21:32:15,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:15,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:16,245 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 254 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:16,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:16,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609000251] [2022-03-15 21:32:16,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609000251] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:16,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344134725] [2022-03-15 21:32:16,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:32:16,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:16,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:16,246 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:32:16,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-15 21:32:16,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-03-15 21:32:16,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:16,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 21:32:16,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:17,712 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 254 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:17,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:19,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344134725] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:19,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:19,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 47, 47] total 116 [2022-03-15 21:32:19,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [718028708] [2022-03-15 21:32:19,407 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:19,412 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:19,445 INFO L252 McrAutomatonBuilder]: Finished intersection with 79 states and 103 transitions. [2022-03-15 21:32:19,445 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:19,831 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [49895#(< i2 N2)] [2022-03-15 21:32:19,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:32:19,832 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:19,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:32:19,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3198, Invalid=10608, Unknown=0, NotChecked=0, Total=13806 [2022-03-15 21:32:19,833 INFO L87 Difference]: Start difference. First operand 173 states and 364 transitions. Second operand has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 21:32:21,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:21,587 INFO L93 Difference]: Finished difference Result 328 states and 646 transitions. [2022-03-15 21:32:21,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-15 21:32:21,587 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-03-15 21:32:21,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:21,588 INFO L225 Difference]: With dead ends: 328 [2022-03-15 21:32:21,588 INFO L226 Difference]: Without dead ends: 327 [2022-03-15 21:32:21,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 38 SyntacticMatches, 22 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11590 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=7970, Invalid=25702, Unknown=0, NotChecked=0, Total=33672 [2022-03-15 21:32:21,591 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 163 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:21,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 0 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:32:21,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-03-15 21:32:21,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 151. [2022-03-15 21:32:21,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1333333333333333) internal successors, (320), 150 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 21:32:21,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 320 transitions. [2022-03-15 21:32:21,593 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 320 transitions. Word has length 53 [2022-03-15 21:32:21,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:21,593 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 320 transitions. [2022-03-15 21:32:21,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 21:32:21,594 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 320 transitions. [2022-03-15 21:32:21,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-15 21:32:21,594 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:21,594 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:21,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-15 21:32:21,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-15 21:32:21,797 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:21,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:21,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1986441798, now seen corresponding path program 67 times [2022-03-15 21:32:21,798 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:21,798 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762312118] [2022-03-15 21:32:21,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:21,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:22,202 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:22,202 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:22,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762312118] [2022-03-15 21:32:22,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762312118] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:22,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990460193] [2022-03-15 21:32:22,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:32:22,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:22,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:22,205 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:32:22,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-15 21:32:22,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:22,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-15 21:32:22,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:22,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:22,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990460193] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:22,611 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:22,611 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 24 [2022-03-15 21:32:22,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1525367006] [2022-03-15 21:32:22,611 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:22,617 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:22,690 INFO L252 McrAutomatonBuilder]: Finished intersection with 127 states and 198 transitions. [2022-03-15 21:32:22,690 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:24,821 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 23 new interpolants: [51023#(and (or (<= (* 22 C) counter) (<= counter (* 21 C))) (or (<= counter 0) (<= counter (* 22 C)))), 51009#(and (or (<= counter 0) (<= counter (* C 8))) (or (<= (* C 8) counter) (<= counter (* 7 C)))), 51013#(and (or (<= counter (* C 11)) (<= (* C 12) counter)) (or (<= counter (* C 12)) (<= counter 0))), 51016#(and (or (<= (* C 15) counter) (<= counter (* 14 C))) (or (<= counter 0) (<= counter (* C 15)))), 51014#(and (or (<= counter 0) (<= counter (* C 13))) (or (<= counter (* C 12)) (<= (* C 13) counter))), 51007#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C)))), 51006#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter))), 51002#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 51015#(and (or (<= (* 14 C) counter) (<= counter (* C 13))) (or (<= counter 0) (<= counter (* 14 C)))), 51019#(and (or (<= counter (* C 17)) (<= (* C 18) counter)) (or (<= counter 0) (<= counter (* C 18)))), 51024#(and (or (<= counter 0) (<= counter (* 23 C))) (or (<= (* 23 C) counter) (<= counter (* 22 C)))), 51008#(and (or (<= counter 0) (<= counter (* 7 C))) (or (<= counter (* 6 C)) (<= (* 7 C) counter))), 51022#(and (or (<= counter 0) (<= counter (* 21 C))) (or (<= (* 21 C) counter) (<= counter (* C 20)))), 51012#(and (or (<= counter (* C 10)) (<= (* C 11) counter)) (or (<= counter 0) (<= counter (* C 11)))), 51021#(and (or (<= counter 0) (<= counter (* C 20))) (or (<= (* C 20) counter) (<= counter (* 19 C)))), 51004#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 51005#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter))), 51020#(and (or (<= counter (* 19 C)) (<= counter 0)) (or (<= (* 19 C) counter) (<= counter (* C 18)))), 51017#(and (or (<= counter 0) (<= counter (* 16 C))) (or (<= (* 16 C) counter) (<= counter (* C 15)))), 51011#(and (or (<= (* C 10) counter) (<= counter (* 9 C))) (or (<= counter (* C 10)) (<= counter 0))), 51018#(and (or (<= counter 0) (<= counter (* C 17))) (or (<= (* C 17) counter) (<= counter (* 16 C)))), 51003#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 51010#(and (or (<= (* 9 C) counter) (<= counter (* C 8))) (or (<= counter 0) (<= counter (* 9 C))))] [2022-03-15 21:32:24,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-15 21:32:24,821 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:24,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-15 21:32:24,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=647, Invalid=1705, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:32:24,822 INFO L87 Difference]: Start difference. First operand 151 states and 320 transitions. Second operand has 49 states, 48 states have (on average 3.0625) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:32:25,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:25,990 INFO L93 Difference]: Finished difference Result 481 states and 931 transitions. [2022-03-15 21:32:25,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 21:32:25,990 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 3.0625) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-03-15 21:32:25,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:25,992 INFO L225 Difference]: With dead ends: 481 [2022-03-15 21:32:25,992 INFO L226 Difference]: Without dead ends: 429 [2022-03-15 21:32:25,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 175 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=647, Invalid=1705, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:32:25,992 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 346 mSDsluCounter, 2002 mSDsCounter, 0 mSdLazyCounter, 3359 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 3359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:25,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 0 Invalid, 3451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 3359 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-15 21:32:25,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-03-15 21:32:25,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 313. [2022-03-15 21:32:25,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.282051282051282) internal successors, (712), 312 states have internal predecessors, (712), 0 states have call successors, (0), 0 states 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 21:32:25,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 712 transitions. [2022-03-15 21:32:25,996 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 712 transitions. Word has length 54 [2022-03-15 21:32:26,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:26,010 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 712 transitions. [2022-03-15 21:32:26,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 3.0625) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:32:26,010 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 712 transitions. [2022-03-15 21:32:26,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-15 21:32:26,011 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:26,011 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:26,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-15 21:32:26,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-15 21:32:26,211 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:26,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:26,212 INFO L85 PathProgramCache]: Analyzing trace with hash 39678080, now seen corresponding path program 68 times [2022-03-15 21:32:26,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:26,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753709221] [2022-03-15 21:32:26,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:26,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:26,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 276 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:27,142 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:27,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753709221] [2022-03-15 21:32:27,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753709221] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:27,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7778975] [2022-03-15 21:32:27,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:32:27,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:27,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:27,144 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:32:27,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-15 21:32:27,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:32:27,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:27,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 21:32:27,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 276 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:29,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:31,038 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 276 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:31,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7778975] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:31,038 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:31,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 145 [2022-03-15 21:32:31,039 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [16292834] [2022-03-15 21:32:31,039 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:31,044 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:31,114 INFO L252 McrAutomatonBuilder]: Finished intersection with 129 states and 201 transitions. [2022-03-15 21:32:31,114 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:33,266 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 24 new interpolants: [52608#(or (<= N2 (+ 6 i2)) (<= (+ i2 8) N2)), 52611#(or (<= (+ i2 11) N2) (<= N2 (+ 9 i2))), 52619#(or (<= N2 (+ i2 17)) (<= (+ 19 i2) N2)), 52605#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 52618#(or (<= N2 (+ 16 i2)) (<= (+ i2 18) N2)), 52615#(or (<= (+ i2 15) N2) (<= N2 (+ i2 13))), 52612#(or (<= N2 (+ i2 10)) (<= (+ i2 12) N2)), 52621#(or (<= N2 (+ 19 i2)) (<= (+ 21 i2) N2)), 52609#(or (<= (+ 9 i2) N2) (<= N2 (+ 7 i2))), 52606#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 52603#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 52613#(or (<= N2 (+ i2 11)) (<= (+ i2 13) N2)), 52620#(or (<= (+ i2 20) N2) (<= N2 (+ i2 18))), 52625#(< i1 N1), 52614#(or (<= N2 (+ i2 12)) (<= (+ 14 i2) N2)), 52610#(or (<= (+ i2 10) N2) (<= N2 (+ i2 8))), 52607#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2))), 52617#(or (<= N2 (+ i2 15)) (<= (+ i2 17) N2)), 52623#(or (<= (+ 23 i2) N2) (<= N2 (+ 21 i2))), 52624#(or (<= N2 (+ 22 i2)) (<= (+ i2 24) N2)), 52602#(or (<= N2 i2) (<= (+ 2 i2) N2)), 52604#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2))), 52616#(or (<= N2 (+ 14 i2)) (<= (+ 16 i2) N2)), 52622#(or (<= (+ 22 i2) N2) (<= N2 (+ i2 20)))] [2022-03-15 21:32:33,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-15 21:32:33,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:33,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-15 21:32:33,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4093, Invalid=24637, Unknown=0, NotChecked=0, Total=28730 [2022-03-15 21:32:33,268 INFO L87 Difference]: Start difference. First operand 313 states and 712 transitions. Second operand has 75 states, 75 states have (on average 2.026666666666667) internal successors, (152), 74 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 21:32:36,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:36,461 INFO L93 Difference]: Finished difference Result 532 states and 1051 transitions. [2022-03-15 21:32:36,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-15 21:32:36,461 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.026666666666667) internal successors, (152), 74 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-03-15 21:32:36,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:36,462 INFO L225 Difference]: With dead ends: 532 [2022-03-15 21:32:36,462 INFO L226 Difference]: Without dead ends: 442 [2022-03-15 21:32:36,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 38 SyntacticMatches, 25 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19773 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=11462, Invalid=46378, Unknown=0, NotChecked=0, Total=57840 [2022-03-15 21:32:36,465 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 522 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 1758 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:36,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 0 Invalid, 1900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1758 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 21:32:36,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-03-15 21:32:36,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 180. [2022-03-15 21:32:36,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.11731843575419) internal successors, (379), 179 states have internal predecessors, (379), 0 states have call successors, (0), 0 states 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 21:32:36,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 379 transitions. [2022-03-15 21:32:36,468 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 379 transitions. Word has length 55 [2022-03-15 21:32:36,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:36,469 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 379 transitions. [2022-03-15 21:32:36,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.026666666666667) internal successors, (152), 74 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 21:32:36,469 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 379 transitions. [2022-03-15 21:32:36,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-15 21:32:36,469 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:36,469 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:36,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-15 21:32:36,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:36,673 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:36,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:36,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1566396972, now seen corresponding path program 69 times [2022-03-15 21:32:36,674 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:36,674 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425865160] [2022-03-15 21:32:36,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:36,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 277 proven. 299 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:37,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:37,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425865160] [2022-03-15 21:32:37,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425865160] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:37,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484739654] [2022-03-15 21:32:37,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:32:37,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:37,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:37,104 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:32:37,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-15 21:32:37,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-03-15 21:32:37,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:37,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 21:32:37,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:38,700 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 277 proven. 299 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:38,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:40,529 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:40,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484739654] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:40,530 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:40,530 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 49, 49] total 121 [2022-03-15 21:32:40,530 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [451184582] [2022-03-15 21:32:40,530 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:40,536 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:40,572 INFO L252 McrAutomatonBuilder]: Finished intersection with 82 states and 107 transitions. [2022-03-15 21:32:40,573 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:40,983 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [54106#(< i2 N2)] [2022-03-15 21:32:40,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:32:40,983 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:40,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:32:40,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3469, Invalid=11537, Unknown=0, NotChecked=0, Total=15006 [2022-03-15 21:32:40,984 INFO L87 Difference]: Start difference. First operand 180 states and 379 transitions. Second operand has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 21:32:42,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:42,883 INFO L93 Difference]: Finished difference Result 342 states and 674 transitions. [2022-03-15 21:32:42,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-15 21:32:42,883 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-03-15 21:32:42,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:42,884 INFO L225 Difference]: With dead ends: 342 [2022-03-15 21:32:42,884 INFO L226 Difference]: Without dead ends: 341 [2022-03-15 21:32:42,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 39 SyntacticMatches, 23 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12657 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=8665, Invalid=28007, Unknown=0, NotChecked=0, Total=36672 [2022-03-15 21:32:42,887 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 140 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:42,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 0 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:32:42,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-03-15 21:32:42,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 157. [2022-03-15 21:32:42,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.1346153846153846) internal successors, (333), 156 states have internal predecessors, (333), 0 states have call successors, (0), 0 states 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 21:32:42,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 333 transitions. [2022-03-15 21:32:42,890 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 333 transitions. Word has length 55 [2022-03-15 21:32:42,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:42,890 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 333 transitions. [2022-03-15 21:32:42,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 21:32:42,890 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 333 transitions. [2022-03-15 21:32:42,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-15 21:32:42,891 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:42,891 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:42,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-15 21:32:43,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:43,107 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:43,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:43,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1205748360, now seen corresponding path program 70 times [2022-03-15 21:32:43,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:43,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555898945] [2022-03-15 21:32:43,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:43,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:43,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 599 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:43,568 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:43,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555898945] [2022-03-15 21:32:43,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555898945] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:43,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294724032] [2022-03-15 21:32:43,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:32:43,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:43,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:43,569 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:32:43,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-15 21:32:43,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:32:43,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:43,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-15 21:32:43,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:43,807 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 599 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:43,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:43,991 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 599 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:43,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294724032] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:43,992 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:43,992 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 25 [2022-03-15 21:32:43,992 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [291739683] [2022-03-15 21:32:43,992 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:43,998 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:44,054 INFO L252 McrAutomatonBuilder]: Finished intersection with 132 states and 206 transitions. [2022-03-15 21:32:44,054 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:46,378 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 24 new interpolants: [55264#(and (or (<= counter 0) (<= counter (* 7 C))) (or (<= counter (* 6 C)) (<= (* 7 C) counter))), 55277#(and (or (<= counter 0) (<= counter (* C 20))) (or (<= (* C 20) counter) (<= counter (* 19 C)))), 55268#(and (or (<= counter (* C 10)) (<= (* C 11) counter)) (or (<= counter 0) (<= counter (* C 11)))), 55279#(and (or (<= (* 22 C) counter) (<= counter (* 21 C))) (or (<= counter 0) (<= counter (* 22 C)))), 55270#(and (or (<= counter 0) (<= counter (* C 13))) (or (<= counter (* C 12)) (<= (* C 13) counter))), 55262#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter))), 55261#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter))), 55260#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 55259#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 55275#(and (or (<= counter (* C 17)) (<= (* C 18) counter)) (or (<= counter 0) (<= counter (* C 18)))), 55258#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 55269#(and (or (<= counter (* C 11)) (<= (* C 12) counter)) (or (<= counter (* C 12)) (<= counter 0))), 55276#(and (or (<= counter (* 19 C)) (<= counter 0)) (or (<= (* 19 C) counter) (<= counter (* C 18)))), 55272#(and (or (<= (* C 15) counter) (<= counter (* 14 C))) (or (<= counter 0) (<= counter (* C 15)))), 55263#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C)))), 55267#(and (or (<= (* C 10) counter) (<= counter (* 9 C))) (or (<= counter (* C 10)) (<= counter 0))), 55274#(and (or (<= counter 0) (<= counter (* C 17))) (or (<= (* C 17) counter) (<= counter (* 16 C)))), 55273#(and (or (<= counter 0) (<= counter (* 16 C))) (or (<= (* 16 C) counter) (<= counter (* C 15)))), 55271#(and (or (<= (* 14 C) counter) (<= counter (* C 13))) (or (<= counter 0) (<= counter (* 14 C)))), 55278#(and (or (<= counter 0) (<= counter (* 21 C))) (or (<= (* 21 C) counter) (<= counter (* C 20)))), 55280#(and (or (<= counter 0) (<= counter (* 23 C))) (or (<= (* 23 C) counter) (<= counter (* 22 C)))), 55266#(and (or (<= (* 9 C) counter) (<= counter (* C 8))) (or (<= counter 0) (<= counter (* 9 C)))), 55265#(and (or (<= counter 0) (<= counter (* C 8))) (or (<= (* C 8) counter) (<= counter (* 7 C)))), 55281#(and (or (<= (* C 24) counter) (<= counter (* 23 C))) (or (<= counter (* C 24)) (<= counter 0)))] [2022-03-15 21:32:46,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-15 21:32:46,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:46,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-15 21:32:46,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=699, Invalid=1851, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:32:46,379 INFO L87 Difference]: Start difference. First operand 157 states and 333 transitions. Second operand has 51 states, 50 states have (on average 3.06) internal successors, (153), 50 states have internal predecessors, (153), 0 states have call successors, (0), 0 states 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 21:32:47,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:47,538 INFO L93 Difference]: Finished difference Result 501 states and 970 transitions. [2022-03-15 21:32:47,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 21:32:47,538 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 3.06) internal successors, (153), 50 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-03-15 21:32:47,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:47,540 INFO L225 Difference]: With dead ends: 501 [2022-03-15 21:32:47,540 INFO L226 Difference]: Without dead ends: 447 [2022-03-15 21:32:47,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 182 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=699, Invalid=1851, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:32:47,542 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 422 mSDsluCounter, 1949 mSDsCounter, 0 mSdLazyCounter, 3283 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 3283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:47,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 0 Invalid, 3380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 3283 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-15 21:32:47,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-03-15 21:32:47,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 326. [2022-03-15 21:32:47,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.2830769230769232) internal successors, (742), 325 states have internal predecessors, (742), 0 states have call successors, (0), 0 states 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 21:32:47,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 742 transitions. [2022-03-15 21:32:47,546 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 742 transitions. Word has length 56 [2022-03-15 21:32:47,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:47,546 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 742 transitions. [2022-03-15 21:32:47,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 3.06) internal successors, (153), 50 states have internal predecessors, (153), 0 states have call successors, (0), 0 states 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 21:32:47,546 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 742 transitions. [2022-03-15 21:32:47,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-15 21:32:47,547 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:47,547 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:47,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-15 21:32:47,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:47,762 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:47,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:47,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1323410878, now seen corresponding path program 71 times [2022-03-15 21:32:47,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:47,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476747171] [2022-03-15 21:32:47,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:47,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:47,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:48,774 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 300 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:48,775 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:48,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476747171] [2022-03-15 21:32:48,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476747171] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:48,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584815102] [2022-03-15 21:32:48,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:32:48,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:48,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:48,776 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:32:48,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-15 21:32:48,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-03-15 21:32:48,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:48,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-15 21:32:48,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 300 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:50,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:52,991 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 300 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:52,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584815102] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:52,991 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:52,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 151 [2022-03-15 21:32:52,992 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1322468880] [2022-03-15 21:32:52,992 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:52,998 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:53,057 INFO L252 McrAutomatonBuilder]: Finished intersection with 134 states and 209 transitions. [2022-03-15 21:32:53,057 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:55,386 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 25 new interpolants: [56935#(or (<= N2 (+ i2 12)) (<= (+ 14 i2) N2)), 56929#(or (<= N2 (+ 6 i2)) (<= (+ i2 8) N2)), 56940#(or (<= N2 (+ i2 17)) (<= (+ 19 i2) N2)), 56944#(or (<= (+ 23 i2) N2) (<= N2 (+ 21 i2))), 56947#(< i1 N1), 56938#(or (<= N2 (+ i2 15)) (<= (+ i2 17) N2)), 56942#(or (<= N2 (+ 19 i2)) (<= (+ 21 i2) N2)), 56931#(or (<= (+ i2 10) N2) (<= N2 (+ i2 8))), 56927#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 56926#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 56933#(or (<= N2 (+ i2 10)) (<= (+ i2 12) N2)), 56928#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2))), 56946#(or (<= N2 (+ 23 i2)) (<= (+ i2 25) N2)), 56943#(or (<= (+ 22 i2) N2) (<= N2 (+ i2 20))), 56924#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 56937#(or (<= N2 (+ 14 i2)) (<= (+ 16 i2) N2)), 56941#(or (<= (+ i2 20) N2) (<= N2 (+ i2 18))), 56936#(or (<= (+ i2 15) N2) (<= N2 (+ i2 13))), 56932#(or (<= (+ i2 11) N2) (<= N2 (+ 9 i2))), 56930#(or (<= (+ 9 i2) N2) (<= N2 (+ 7 i2))), 56939#(or (<= N2 (+ 16 i2)) (<= (+ i2 18) N2)), 56945#(or (<= N2 (+ 22 i2)) (<= (+ i2 24) N2)), 56934#(or (<= N2 (+ i2 11)) (<= (+ i2 13) N2)), 56923#(or (<= N2 i2) (<= (+ 2 i2) N2)), 56925#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2)))] [2022-03-15 21:32:55,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-15 21:32:55,387 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:55,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-15 21:32:55,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4426, Invalid=26726, Unknown=0, NotChecked=0, Total=31152 [2022-03-15 21:32:55,389 INFO L87 Difference]: Start difference. First operand 326 states and 742 transitions. Second operand has 78 states, 78 states have (on average 2.0256410256410255) internal successors, (158), 77 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 21:32:58,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:58,885 INFO L93 Difference]: Finished difference Result 554 states and 1095 transitions. [2022-03-15 21:32:58,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-15 21:32:58,886 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0256410256410255) internal successors, (158), 77 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-03-15 21:32:58,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:58,887 INFO L225 Difference]: With dead ends: 554 [2022-03-15 21:32:58,887 INFO L226 Difference]: Without dead ends: 460 [2022-03-15 21:32:58,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 39 SyntacticMatches, 26 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21484 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=12427, Invalid=50323, Unknown=0, NotChecked=0, Total=62750 [2022-03-15 21:32:58,890 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 659 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 1885 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:58,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [659 Valid, 0 Invalid, 2036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1885 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 21:32:58,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-03-15 21:32:58,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 187. [2022-03-15 21:32:58,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.118279569892473) internal successors, (394), 186 states have internal predecessors, (394), 0 states have call successors, (0), 0 states 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 21:32:58,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 394 transitions. [2022-03-15 21:32:58,894 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 394 transitions. Word has length 57 [2022-03-15 21:32:58,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:58,894 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 394 transitions. [2022-03-15 21:32:58,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.0256410256410255) internal successors, (158), 77 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 21:32:58,894 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 394 transitions. [2022-03-15 21:32:58,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-15 21:32:58,894 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:58,894 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:58,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-15 21:32:59,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-03-15 21:32:59,095 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:59,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:59,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1160263126, now seen corresponding path program 72 times [2022-03-15 21:32:59,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:59,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611666751] [2022-03-15 21:32:59,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:59,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:59,549 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 301 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:59,549 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:59,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611666751] [2022-03-15 21:32:59,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611666751] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:59,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654199803] [2022-03-15 21:32:59,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:32:59,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:59,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:59,550 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:32:59,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-15 21:32:59,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-03-15 21:32:59,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:59,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-15 21:32:59,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:01,222 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 301 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:01,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:03,169 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:03,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654199803] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:03,170 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:03,170 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 51, 51] total 126 [2022-03-15 21:33:03,170 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1361535245] [2022-03-15 21:33:03,170 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:03,176 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:03,239 INFO L252 McrAutomatonBuilder]: Finished intersection with 85 states and 111 transitions. [2022-03-15 21:33:03,239 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:03,672 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [58487#(< i2 N2)] [2022-03-15 21:33:03,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 21:33:03,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:03,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 21:33:03,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3751, Invalid=12505, Unknown=0, NotChecked=0, Total=16256 [2022-03-15 21:33:03,674 INFO L87 Difference]: Start difference. First operand 187 states and 394 transitions. Second operand has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:05,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:05,676 INFO L93 Difference]: Finished difference Result 356 states and 702 transitions. [2022-03-15 21:33:05,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-15 21:33:05,676 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-03-15 21:33:05,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:05,677 INFO L225 Difference]: With dead ends: 356 [2022-03-15 21:33:05,677 INFO L226 Difference]: Without dead ends: 355 [2022-03-15 21:33:05,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 40 SyntacticMatches, 24 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13771 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=9389, Invalid=30411, Unknown=0, NotChecked=0, Total=39800 [2022-03-15 21:33:05,679 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 183 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:05,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 0 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:33:05,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-03-15 21:33:05,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 163. [2022-03-15 21:33:05,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.1358024691358026) internal successors, (346), 162 states have internal predecessors, (346), 0 states have call successors, (0), 0 states 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 21:33:05,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 346 transitions. [2022-03-15 21:33:05,681 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 346 transitions. Word has length 57 [2022-03-15 21:33:05,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:05,681 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 346 transitions. [2022-03-15 21:33:05,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:05,681 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 346 transitions. [2022-03-15 21:33:05,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-15 21:33:05,681 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:05,682 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:05,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-15 21:33:05,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:05,882 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:05,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:05,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1899663622, now seen corresponding path program 73 times [2022-03-15 21:33:05,883 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:05,883 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296847284] [2022-03-15 21:33:05,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:05,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:06,342 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 649 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:06,343 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:06,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296847284] [2022-03-15 21:33:06,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296847284] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:06,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643338000] [2022-03-15 21:33:06,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:33:06,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:06,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:06,348 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:06,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-15 21:33:06,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:06,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 103 conjunts are in the unsatisfiable core [2022-03-15 21:33:06,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:06,609 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 649 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:06,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:06,809 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 649 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:06,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643338000] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:06,809 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:06,809 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 26 [2022-03-15 21:33:06,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2031308216] [2022-03-15 21:33:06,809 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:06,816 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:06,875 INFO L252 McrAutomatonBuilder]: Finished intersection with 137 states and 214 transitions. [2022-03-15 21:33:06,875 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:09,288 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 25 new interpolants: [59696#(and (or (<= counter 0) (<= counter (* C 13))) (or (<= counter (* C 12)) (<= (* C 13) counter))), 59698#(and (or (<= (* C 15) counter) (<= counter (* 14 C))) (or (<= counter 0) (<= counter (* C 15)))), 59708#(and (or (<= counter (* C 24)) (<= (* C 25) counter)) (or (<= counter 0) (<= counter (* C 25)))), 59700#(and (or (<= counter 0) (<= counter (* C 17))) (or (<= (* C 17) counter) (<= counter (* 16 C)))), 59687#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter))), 59695#(and (or (<= counter (* C 11)) (<= (* C 12) counter)) (or (<= counter (* C 12)) (<= counter 0))), 59705#(and (or (<= (* 22 C) counter) (<= counter (* 21 C))) (or (<= counter 0) (<= counter (* 22 C)))), 59704#(and (or (<= counter 0) (<= counter (* 21 C))) (or (<= (* 21 C) counter) (<= counter (* C 20)))), 59693#(and (or (<= (* C 10) counter) (<= counter (* 9 C))) (or (<= counter (* C 10)) (<= counter 0))), 59691#(and (or (<= counter 0) (<= counter (* C 8))) (or (<= (* C 8) counter) (<= counter (* 7 C)))), 59703#(and (or (<= counter 0) (<= counter (* C 20))) (or (<= (* C 20) counter) (<= counter (* 19 C)))), 59684#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 59707#(and (or (<= (* C 24) counter) (<= counter (* 23 C))) (or (<= counter (* C 24)) (<= counter 0))), 59692#(and (or (<= (* 9 C) counter) (<= counter (* C 8))) (or (<= counter 0) (<= counter (* 9 C)))), 59686#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 59706#(and (or (<= counter 0) (<= counter (* 23 C))) (or (<= (* 23 C) counter) (<= counter (* 22 C)))), 59694#(and (or (<= counter (* C 10)) (<= (* C 11) counter)) (or (<= counter 0) (<= counter (* C 11)))), 59685#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 59702#(and (or (<= counter (* 19 C)) (<= counter 0)) (or (<= (* 19 C) counter) (<= counter (* C 18)))), 59689#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C)))), 59688#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter))), 59701#(and (or (<= counter (* C 17)) (<= (* C 18) counter)) (or (<= counter 0) (<= counter (* C 18)))), 59690#(and (or (<= counter 0) (<= counter (* 7 C))) (or (<= counter (* 6 C)) (<= (* 7 C) counter))), 59699#(and (or (<= counter 0) (<= counter (* 16 C))) (or (<= (* 16 C) counter) (<= counter (* C 15)))), 59697#(and (or (<= (* 14 C) counter) (<= counter (* C 13))) (or (<= counter 0) (<= counter (* 14 C))))] [2022-03-15 21:33:09,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-15 21:33:09,289 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:09,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-15 21:33:09,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=753, Invalid=2003, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 21:33:09,289 INFO L87 Difference]: Start difference. First operand 163 states and 346 transitions. Second operand has 53 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 52 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 21:33:10,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:10,519 INFO L93 Difference]: Finished difference Result 521 states and 1009 transitions. [2022-03-15 21:33:10,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 21:33:10,519 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 52 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-03-15 21:33:10,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:10,521 INFO L225 Difference]: With dead ends: 521 [2022-03-15 21:33:10,521 INFO L226 Difference]: Without dead ends: 465 [2022-03-15 21:33:10,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 189 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=753, Invalid=2003, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 21:33:10,522 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 460 mSDsluCounter, 2094 mSDsCounter, 0 mSdLazyCounter, 3516 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 3516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:10,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 0 Invalid, 3624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 3516 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-15 21:33:10,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-03-15 21:33:10,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 339. [2022-03-15 21:33:10,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.2840236686390534) internal successors, (772), 338 states have internal predecessors, (772), 0 states have call successors, (0), 0 states 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 21:33:10,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 772 transitions. [2022-03-15 21:33:10,526 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 772 transitions. Word has length 58 [2022-03-15 21:33:10,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:10,526 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 772 transitions. [2022-03-15 21:33:10,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 52 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 21:33:10,527 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 772 transitions. [2022-03-15 21:33:10,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-15 21:33:10,527 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:10,527 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:10,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-15 21:33:10,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:10,728 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:10,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:10,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1965841856, now seen corresponding path program 74 times [2022-03-15 21:33:10,729 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:10,729 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436477178] [2022-03-15 21:33:10,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:10,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:11,807 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 325 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:11,807 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:11,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436477178] [2022-03-15 21:33:11,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436477178] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:11,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843390190] [2022-03-15 21:33:11,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:33:11,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:11,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:11,809 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:11,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-15 21:33:11,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:33:11,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:11,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-15 21:33:11,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:13,968 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 325 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:13,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:16,308 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 325 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:16,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843390190] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:16,309 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:16,309 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 157 [2022-03-15 21:33:16,309 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1523486443] [2022-03-15 21:33:16,309 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:16,316 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:16,376 INFO L252 McrAutomatonBuilder]: Finished intersection with 139 states and 217 transitions. [2022-03-15 21:33:16,377 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:18,825 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 26 new interpolants: [61435#(or (<= (+ 23 i2) N2) (<= N2 (+ 21 i2))), 61430#(or (<= N2 (+ 16 i2)) (<= (+ i2 18) N2)), 61429#(or (<= N2 (+ i2 15)) (<= (+ i2 17) N2)), 61414#(or (<= N2 i2) (<= (+ 2 i2) N2)), 61432#(or (<= (+ i2 20) N2) (<= N2 (+ i2 18))), 61437#(or (<= N2 (+ 23 i2)) (<= (+ i2 25) N2)), 61424#(or (<= N2 (+ i2 10)) (<= (+ i2 12) N2)), 61418#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 61439#(< i1 N1), 61438#(or (<= (+ i2 26) N2) (<= N2 (+ i2 24))), 61421#(or (<= (+ 9 i2) N2) (<= N2 (+ 7 i2))), 61417#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 61428#(or (<= N2 (+ 14 i2)) (<= (+ 16 i2) N2)), 61436#(or (<= N2 (+ 22 i2)) (<= (+ i2 24) N2)), 61419#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2))), 61431#(or (<= N2 (+ i2 17)) (<= (+ 19 i2) N2)), 61427#(or (<= (+ i2 15) N2) (<= N2 (+ i2 13))), 61415#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 61433#(or (<= N2 (+ 19 i2)) (<= (+ 21 i2) N2)), 61434#(or (<= (+ 22 i2) N2) (<= N2 (+ i2 20))), 61426#(or (<= N2 (+ i2 12)) (<= (+ 14 i2) N2)), 61416#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2))), 61423#(or (<= (+ i2 11) N2) (<= N2 (+ 9 i2))), 61420#(or (<= N2 (+ 6 i2)) (<= (+ i2 8) N2)), 61422#(or (<= (+ i2 10) N2) (<= N2 (+ i2 8))), 61425#(or (<= N2 (+ i2 11)) (<= (+ i2 13) N2))] [2022-03-15 21:33:18,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-15 21:33:18,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:18,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-15 21:33:18,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4772, Invalid=28900, Unknown=0, NotChecked=0, Total=33672 [2022-03-15 21:33:18,827 INFO L87 Difference]: Start difference. First operand 339 states and 772 transitions. Second operand has 81 states, 81 states have (on average 2.0246913580246915) internal successors, (164), 80 states have internal predecessors, (164), 0 states have call successors, (0), 0 states 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 21:33:22,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:22,516 INFO L93 Difference]: Finished difference Result 576 states and 1139 transitions. [2022-03-15 21:33:22,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-15 21:33:22,516 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0246913580246915) internal successors, (164), 80 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-03-15 21:33:22,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:22,518 INFO L225 Difference]: With dead ends: 576 [2022-03-15 21:33:22,518 INFO L226 Difference]: Without dead ends: 478 [2022-03-15 21:33:22,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 40 SyntacticMatches, 27 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23266 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=13431, Invalid=54429, Unknown=0, NotChecked=0, Total=67860 [2022-03-15 21:33:22,523 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 534 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 2074 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 2074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:22,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 0 Invalid, 2225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 2074 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 21:33:22,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-03-15 21:33:22,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 194. [2022-03-15 21:33:22,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.1191709844559585) internal successors, (409), 193 states have internal predecessors, (409), 0 states have call successors, (0), 0 states 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 21:33:22,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 409 transitions. [2022-03-15 21:33:22,527 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 409 transitions. Word has length 59 [2022-03-15 21:33:22,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:22,528 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 409 transitions. [2022-03-15 21:33:22,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0246913580246915) internal successors, (164), 80 states have internal predecessors, (164), 0 states have call successors, (0), 0 states 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 21:33:22,528 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 409 transitions. [2022-03-15 21:33:22,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-15 21:33:22,528 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:22,528 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:22,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-15 21:33:22,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-03-15 21:33:22,743 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:22,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:22,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1123726484, now seen corresponding path program 75 times [2022-03-15 21:33:22,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:22,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882156026] [2022-03-15 21:33:22,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:22,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:22,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:23,322 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 326 proven. 350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:23,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:23,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882156026] [2022-03-15 21:33:23,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882156026] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:23,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343561243] [2022-03-15 21:33:23,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:33:23,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:23,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:23,324 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:23,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-15 21:33:23,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-03-15 21:33:23,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:23,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-15 21:33:23,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:25,138 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 326 proven. 350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:25,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:27,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343561243] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:27,236 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:27,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 53, 53] total 131 [2022-03-15 21:33:27,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [705195293] [2022-03-15 21:33:27,236 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:27,243 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:27,285 INFO L252 McrAutomatonBuilder]: Finished intersection with 88 states and 115 transitions. [2022-03-15 21:33:27,286 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:27,751 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [63038#(< i2 N2)] [2022-03-15 21:33:27,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 21:33:27,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:27,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 21:33:27,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4044, Invalid=13512, Unknown=0, NotChecked=0, Total=17556 [2022-03-15 21:33:27,753 INFO L87 Difference]: Start difference. First operand 194 states and 409 transitions. Second operand has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:29,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:29,914 INFO L93 Difference]: Finished difference Result 370 states and 730 transitions. [2022-03-15 21:33:29,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-15 21:33:29,915 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-03-15 21:33:29,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:29,916 INFO L225 Difference]: With dead ends: 370 [2022-03-15 21:33:29,916 INFO L226 Difference]: Without dead ends: 369 [2022-03-15 21:33:29,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 41 SyntacticMatches, 25 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14932 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=10142, Invalid=32914, Unknown=0, NotChecked=0, Total=43056 [2022-03-15 21:33:29,919 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 150 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:29,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 0 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:33:29,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-03-15 21:33:29,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 169. [2022-03-15 21:33:29,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.136904761904762) internal successors, (359), 168 states have internal predecessors, (359), 0 states have call successors, (0), 0 states 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 21:33:29,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 359 transitions. [2022-03-15 21:33:29,921 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 359 transitions. Word has length 59 [2022-03-15 21:33:29,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:29,921 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 359 transitions. [2022-03-15 21:33:29,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:29,921 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 359 transitions. [2022-03-15 21:33:29,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-15 21:33:29,922 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:29,922 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:29,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-15 21:33:30,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-15 21:33:30,122 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:30,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:30,123 INFO L85 PathProgramCache]: Analyzing trace with hash -835827512, now seen corresponding path program 76 times [2022-03-15 21:33:30,123 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:30,123 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014163547] [2022-03-15 21:33:30,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:30,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:30,610 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 701 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:30,610 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:30,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014163547] [2022-03-15 21:33:30,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014163547] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:30,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110275633] [2022-03-15 21:33:30,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:33:30,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:30,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:30,612 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:30,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-15 21:33:30,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:33:30,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:30,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 107 conjunts are in the unsatisfiable core [2022-03-15 21:33:30,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:30,859 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 701 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:30,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 701 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:31,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110275633] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:31,056 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:31,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 27 [2022-03-15 21:33:31,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [888317572] [2022-03-15 21:33:31,057 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:31,078 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:31,142 INFO L252 McrAutomatonBuilder]: Finished intersection with 142 states and 222 transitions. [2022-03-15 21:33:31,142 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:33,653 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 26 new interpolants: [64303#(and (or (<= (* C 24) counter) (<= counter (* 23 C))) (or (<= counter (* C 24)) (<= counter 0))), 64293#(and (or (<= (* 14 C) counter) (<= counter (* C 13))) (or (<= counter 0) (<= counter (* 14 C)))), 64305#(and (or (<= counter (* C 25)) (<= (* C 26) counter)) (or (<= counter 0) (<= counter (* C 26)))), 64291#(and (or (<= counter (* C 11)) (<= (* C 12) counter)) (or (<= counter (* C 12)) (<= counter 0))), 64284#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter))), 64304#(and (or (<= counter (* C 24)) (<= (* C 25) counter)) (or (<= counter 0) (<= counter (* C 25)))), 64301#(and (or (<= (* 22 C) counter) (<= counter (* 21 C))) (or (<= counter 0) (<= counter (* 22 C)))), 64297#(and (or (<= counter (* C 17)) (<= (* C 18) counter)) (or (<= counter 0) (<= counter (* C 18)))), 64294#(and (or (<= (* C 15) counter) (<= counter (* 14 C))) (or (<= counter 0) (<= counter (* C 15)))), 64295#(and (or (<= counter 0) (<= counter (* 16 C))) (or (<= (* 16 C) counter) (<= counter (* C 15)))), 64289#(and (or (<= (* C 10) counter) (<= counter (* 9 C))) (or (<= counter (* C 10)) (<= counter 0))), 64282#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 64298#(and (or (<= counter (* 19 C)) (<= counter 0)) (or (<= (* 19 C) counter) (<= counter (* C 18)))), 64300#(and (or (<= counter 0) (<= counter (* 21 C))) (or (<= (* 21 C) counter) (<= counter (* C 20)))), 64286#(and (or (<= counter 0) (<= counter (* 7 C))) (or (<= counter (* 6 C)) (<= (* 7 C) counter))), 64287#(and (or (<= counter 0) (<= counter (* C 8))) (or (<= (* C 8) counter) (<= counter (* 7 C)))), 64296#(and (or (<= counter 0) (<= counter (* C 17))) (or (<= (* C 17) counter) (<= counter (* 16 C)))), 64288#(and (or (<= (* 9 C) counter) (<= counter (* C 8))) (or (<= counter 0) (<= counter (* 9 C)))), 64285#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C)))), 64302#(and (or (<= counter 0) (<= counter (* 23 C))) (or (<= (* 23 C) counter) (<= counter (* 22 C)))), 64283#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter))), 64281#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 64292#(and (or (<= counter 0) (<= counter (* C 13))) (or (<= counter (* C 12)) (<= (* C 13) counter))), 64290#(and (or (<= counter (* C 10)) (<= (* C 11) counter)) (or (<= counter 0) (<= counter (* C 11)))), 64280#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 64299#(and (or (<= counter 0) (<= counter (* C 20))) (or (<= (* C 20) counter) (<= counter (* 19 C))))] [2022-03-15 21:33:33,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-15 21:33:33,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:33,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-15 21:33:33,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=809, Invalid=2161, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 21:33:33,654 INFO L87 Difference]: Start difference. First operand 169 states and 359 transitions. Second operand has 55 states, 54 states have (on average 3.0555555555555554) internal successors, (165), 54 states have internal predecessors, (165), 0 states have call successors, (0), 0 states 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 21:33:35,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:35,158 INFO L93 Difference]: Finished difference Result 541 states and 1048 transitions. [2022-03-15 21:33:35,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 21:33:35,159 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 3.0555555555555554) internal successors, (165), 54 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-03-15 21:33:35,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:35,160 INFO L225 Difference]: With dead ends: 541 [2022-03-15 21:33:35,160 INFO L226 Difference]: Without dead ends: 483 [2022-03-15 21:33:35,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 196 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=809, Invalid=2161, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 21:33:35,160 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 501 mSDsluCounter, 2588 mSDsCounter, 0 mSdLazyCounter, 4319 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 4319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:35,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 0 Invalid, 4450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 4319 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-15 21:33:35,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-03-15 21:33:35,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 352. [2022-03-15 21:33:35,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.284900284900285) internal successors, (802), 351 states have internal predecessors, (802), 0 states have call successors, (0), 0 states 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 21:33:35,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 802 transitions. [2022-03-15 21:33:35,164 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 802 transitions. Word has length 60 [2022-03-15 21:33:35,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:35,164 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 802 transitions. [2022-03-15 21:33:35,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 3.0555555555555554) internal successors, (165), 54 states have internal predecessors, (165), 0 states have call successors, (0), 0 states 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 21:33:35,164 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 802 transitions. [2022-03-15 21:33:35,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-15 21:33:35,165 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:35,165 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:35,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-03-15 21:33:35,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:35,365 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:35,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:35,366 INFO L85 PathProgramCache]: Analyzing trace with hash -439880830, now seen corresponding path program 77 times [2022-03-15 21:33:35,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:35,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212109777] [2022-03-15 21:33:35,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:35,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:36,509 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 351 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:36,509 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:36,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212109777] [2022-03-15 21:33:36,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212109777] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:36,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157274421] [2022-03-15 21:33:36,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:33:36,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:36,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:36,510 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:36,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-15 21:33:36,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-03-15 21:33:36,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:36,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-15 21:33:36,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 351 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:38,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 351 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:41,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157274421] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:41,323 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:41,324 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 163 [2022-03-15 21:33:41,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [28428130] [2022-03-15 21:33:41,324 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:41,331 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:41,420 INFO L252 McrAutomatonBuilder]: Finished intersection with 144 states and 225 transitions. [2022-03-15 21:33:41,420 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:44,045 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 27 new interpolants: [66092#(or (<= N2 (+ i2 17)) (<= (+ 19 i2) N2)), 66083#(or (<= (+ i2 10) N2) (<= N2 (+ i2 8))), 66095#(or (<= (+ 22 i2) N2) (<= N2 (+ i2 20))), 66084#(or (<= (+ i2 11) N2) (<= N2 (+ 9 i2))), 66078#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 66099#(or (<= (+ i2 26) N2) (<= N2 (+ i2 24))), 66096#(or (<= (+ 23 i2) N2) (<= N2 (+ 21 i2))), 66091#(or (<= N2 (+ 16 i2)) (<= (+ i2 18) N2)), 66089#(or (<= N2 (+ 14 i2)) (<= (+ 16 i2) N2)), 66087#(or (<= N2 (+ i2 12)) (<= (+ 14 i2) N2)), 66086#(or (<= N2 (+ i2 11)) (<= (+ i2 13) N2)), 66085#(or (<= N2 (+ i2 10)) (<= (+ i2 12) N2)), 66093#(or (<= (+ i2 20) N2) (<= N2 (+ i2 18))), 66098#(or (<= N2 (+ 23 i2)) (<= (+ i2 25) N2)), 66088#(or (<= (+ i2 15) N2) (<= N2 (+ i2 13))), 66094#(or (<= N2 (+ 19 i2)) (<= (+ 21 i2) N2)), 66081#(or (<= N2 (+ 6 i2)) (<= (+ i2 8) N2)), 66079#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 66090#(or (<= N2 (+ i2 15)) (<= (+ i2 17) N2)), 66075#(or (<= N2 i2) (<= (+ 2 i2) N2)), 66080#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2))), 66097#(or (<= N2 (+ 22 i2)) (<= (+ i2 24) N2)), 66076#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 66082#(or (<= (+ 9 i2) N2) (<= N2 (+ 7 i2))), 66100#(or (<= (+ i2 27) N2) (<= N2 (+ i2 25))), 66101#(< i1 N1), 66077#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2)))] [2022-03-15 21:33:44,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-15 21:33:44,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:44,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-15 21:33:44,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5131, Invalid=31159, Unknown=0, NotChecked=0, Total=36290 [2022-03-15 21:33:44,047 INFO L87 Difference]: Start difference. First operand 352 states and 802 transitions. Second operand has 84 states, 84 states have (on average 2.0238095238095237) internal successors, (170), 83 states have internal predecessors, (170), 0 states have call successors, (0), 0 states 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 21:33:47,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:47,972 INFO L93 Difference]: Finished difference Result 598 states and 1183 transitions. [2022-03-15 21:33:47,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-15 21:33:47,972 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0238095238095237) internal successors, (170), 83 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-03-15 21:33:47,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:47,974 INFO L225 Difference]: With dead ends: 598 [2022-03-15 21:33:47,974 INFO L226 Difference]: Without dead ends: 496 [2022-03-15 21:33:47,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 41 SyntacticMatches, 28 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25119 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=14474, Invalid=58696, Unknown=0, NotChecked=0, Total=73170 [2022-03-15 21:33:47,977 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 612 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 2118 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 2118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:47,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [612 Valid, 0 Invalid, 2273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 2118 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 21:33:47,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-03-15 21:33:47,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 201. [2022-03-15 21:33:47,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.12) internal successors, (424), 200 states have internal predecessors, (424), 0 states have call successors, (0), 0 states 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 21:33:47,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 424 transitions. [2022-03-15 21:33:47,981 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 424 transitions. Word has length 61 [2022-03-15 21:33:47,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:47,981 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 424 transitions. [2022-03-15 21:33:47,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0238095238095237) internal successors, (170), 83 states have internal predecessors, (170), 0 states have call successors, (0), 0 states 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 21:33:47,981 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 424 transitions. [2022-03-15 21:33:47,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-15 21:33:47,982 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:47,982 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:48,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-15 21:33:48,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:48,192 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:48,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:48,192 INFO L85 PathProgramCache]: Analyzing trace with hash -24605718, now seen corresponding path program 78 times [2022-03-15 21:33:48,193 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:48,193 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55016837] [2022-03-15 21:33:48,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:48,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:48,711 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 352 proven. 377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:48,711 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:48,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55016837] [2022-03-15 21:33:48,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55016837] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:48,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492103459] [2022-03-15 21:33:48,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:33:48,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:48,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:48,712 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:48,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-15 21:33:48,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-03-15 21:33:48,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:48,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-15 21:33:48,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:50,606 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 352 proven. 377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:50,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:52,862 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:52,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492103459] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:52,863 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:52,863 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 55, 55] total 136 [2022-03-15 21:33:52,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1639195657] [2022-03-15 21:33:52,863 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:52,870 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:52,949 INFO L252 McrAutomatonBuilder]: Finished intersection with 91 states and 119 transitions. [2022-03-15 21:33:52,949 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:53,442 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [67759#(< i2 N2)] [2022-03-15 21:33:53,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 21:33:53,442 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:53,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 21:33:53,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4348, Invalid=14558, Unknown=0, NotChecked=0, Total=18906 [2022-03-15 21:33:53,443 INFO L87 Difference]: Start difference. First operand 201 states and 424 transitions. Second operand has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 30 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 21:33:55,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:55,783 INFO L93 Difference]: Finished difference Result 384 states and 758 transitions. [2022-03-15 21:33:55,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-03-15 21:33:55,783 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 30 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-03-15 21:33:55,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:55,784 INFO L225 Difference]: With dead ends: 384 [2022-03-15 21:33:55,784 INFO L226 Difference]: Without dead ends: 383 [2022-03-15 21:33:55,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 42 SyntacticMatches, 26 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16140 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=10924, Invalid=35516, Unknown=0, NotChecked=0, Total=46440 [2022-03-15 21:33:55,787 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 211 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:55,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 0 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:33:55,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-03-15 21:33:55,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 175. [2022-03-15 21:33:55,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1379310344827585) internal successors, (372), 174 states have internal predecessors, (372), 0 states have call successors, (0), 0 states 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 21:33:55,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 372 transitions. [2022-03-15 21:33:55,789 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 372 transitions. Word has length 61 [2022-03-15 21:33:55,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:55,789 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 372 transitions. [2022-03-15 21:33:55,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 30 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 21:33:55,790 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 372 transitions. [2022-03-15 21:33:55,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-15 21:33:55,790 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:55,790 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:55,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-15 21:33:55,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:55,991 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:55,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:55,991 INFO L85 PathProgramCache]: Analyzing trace with hash -775675962, now seen corresponding path program 79 times [2022-03-15 21:33:55,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:55,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299381812] [2022-03-15 21:33:55,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:55,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:56,508 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 755 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:56,508 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:56,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299381812] [2022-03-15 21:33:56,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299381812] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:56,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124969521] [2022-03-15 21:33:56,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:33:56,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:56,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:56,510 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:56,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-15 21:33:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:56,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-15 21:33:56,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:56,772 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 755 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:56,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 755 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:56,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124969521] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:56,976 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:56,976 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 28 [2022-03-15 21:33:56,976 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [794427365] [2022-03-15 21:33:56,976 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:56,983 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:57,079 INFO L252 McrAutomatonBuilder]: Finished intersection with 147 states and 230 transitions. [2022-03-15 21:33:57,080 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:59,769 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 27 new interpolants: [69054#(and (or (<= (* 9 C) counter) (<= counter (* C 8))) (or (<= counter 0) (<= counter (* 9 C)))), 69068#(and (or (<= counter 0) (<= counter (* 23 C))) (or (<= (* 23 C) counter) (<= counter (* 22 C)))), 69057#(and (or (<= counter (* C 11)) (<= (* C 12) counter)) (or (<= counter (* C 12)) (<= counter 0))), 69059#(and (or (<= (* 14 C) counter) (<= counter (* C 13))) (or (<= counter 0) (<= counter (* 14 C)))), 69067#(and (or (<= (* 22 C) counter) (<= counter (* 21 C))) (or (<= counter 0) (<= counter (* 22 C)))), 69046#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 69047#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 69050#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter))), 69053#(and (or (<= counter 0) (<= counter (* C 8))) (or (<= (* C 8) counter) (<= counter (* 7 C)))), 69062#(and (or (<= counter 0) (<= counter (* C 17))) (or (<= (* C 17) counter) (<= counter (* 16 C)))), 69069#(and (or (<= (* C 24) counter) (<= counter (* 23 C))) (or (<= counter (* C 24)) (<= counter 0))), 69060#(and (or (<= (* C 15) counter) (<= counter (* 14 C))) (or (<= counter 0) (<= counter (* C 15)))), 69058#(and (or (<= counter 0) (<= counter (* C 13))) (or (<= counter (* C 12)) (<= (* C 13) counter))), 69071#(and (or (<= counter (* C 25)) (<= (* C 26) counter)) (or (<= counter 0) (<= counter (* C 26)))), 69052#(and (or (<= counter 0) (<= counter (* 7 C))) (or (<= counter (* 6 C)) (<= (* 7 C) counter))), 69072#(and (or (<= (* C 27) counter) (<= counter (* C 26))) (or (<= counter (* C 27)) (<= counter 0))), 69048#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 69056#(and (or (<= counter (* C 10)) (<= (* C 11) counter)) (or (<= counter 0) (<= counter (* C 11)))), 69064#(and (or (<= counter (* 19 C)) (<= counter 0)) (or (<= (* 19 C) counter) (<= counter (* C 18)))), 69065#(and (or (<= counter 0) (<= counter (* C 20))) (or (<= (* C 20) counter) (<= counter (* 19 C)))), 69070#(and (or (<= counter (* C 24)) (<= (* C 25) counter)) (or (<= counter 0) (<= counter (* C 25)))), 69051#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C)))), 69049#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter))), 69061#(and (or (<= counter 0) (<= counter (* 16 C))) (or (<= (* 16 C) counter) (<= counter (* C 15)))), 69066#(and (or (<= counter 0) (<= counter (* 21 C))) (or (<= (* 21 C) counter) (<= counter (* C 20)))), 69055#(and (or (<= (* C 10) counter) (<= counter (* 9 C))) (or (<= counter (* C 10)) (<= counter 0))), 69063#(and (or (<= counter (* C 17)) (<= (* C 18) counter)) (or (<= counter 0) (<= counter (* C 18))))] [2022-03-15 21:33:59,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-15 21:33:59,770 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:59,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-15 21:33:59,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=2325, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 21:33:59,770 INFO L87 Difference]: Start difference. First operand 175 states and 372 transitions. Second operand has 57 states, 56 states have (on average 3.0535714285714284) internal successors, (171), 56 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 21:34:01,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:01,266 INFO L93 Difference]: Finished difference Result 561 states and 1087 transitions. [2022-03-15 21:34:01,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 21:34:01,266 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 3.0535714285714284) internal successors, (171), 56 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-03-15 21:34:01,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:01,268 INFO L225 Difference]: With dead ends: 561 [2022-03-15 21:34:01,268 INFO L226 Difference]: Without dead ends: 501 [2022-03-15 21:34:01,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 203 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=867, Invalid=2325, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 21:34:01,268 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 415 mSDsluCounter, 2610 mSDsCounter, 0 mSdLazyCounter, 4360 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 4360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:01,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 0 Invalid, 4458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 4360 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-15 21:34:01,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-03-15 21:34:01,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 365. [2022-03-15 21:34:01,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 2.2857142857142856) internal successors, (832), 364 states have internal predecessors, (832), 0 states have call successors, (0), 0 states 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 21:34:01,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 832 transitions. [2022-03-15 21:34:01,274 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 832 transitions. Word has length 62 [2022-03-15 21:34:01,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:01,274 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 832 transitions. [2022-03-15 21:34:01,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 3.0535714285714284) internal successors, (171), 56 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 21:34:01,275 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 832 transitions. [2022-03-15 21:34:01,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-15 21:34:01,275 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:01,275 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:01,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-15 21:34:01,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:01,498 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:01,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:01,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1771963392, now seen corresponding path program 80 times [2022-03-15 21:34:01,499 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:01,499 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612007081] [2022-03-15 21:34:01,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:01,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:01,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:02,708 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 378 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:02,708 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:02,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612007081] [2022-03-15 21:34:02,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612007081] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:02,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786213314] [2022-03-15 21:34:02,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:34:02,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:02,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:02,712 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:34:02,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-15 21:34:02,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:34:02,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:02,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 21:34:02,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:05,157 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 378 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:05,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:07,849 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 378 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:07,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786213314] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:07,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:07,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 169 [2022-03-15 21:34:07,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [965333484] [2022-03-15 21:34:07,849 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:07,857 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:07,952 INFO L252 McrAutomatonBuilder]: Finished intersection with 149 states and 233 transitions. [2022-03-15 21:34:07,952 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:10,759 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 28 new interpolants: [70924#(or (<= (+ i2 20) N2) (<= N2 (+ i2 18))), 70923#(or (<= N2 (+ i2 17)) (<= (+ 19 i2) N2)), 70931#(or (<= (+ i2 27) N2) (<= N2 (+ i2 25))), 70927#(or (<= (+ 23 i2) N2) (<= N2 (+ 21 i2))), 70916#(or (<= N2 (+ i2 10)) (<= (+ i2 12) N2)), 70918#(or (<= N2 (+ i2 12)) (<= (+ 14 i2) N2)), 70928#(or (<= N2 (+ 22 i2)) (<= (+ i2 24) N2)), 70922#(or (<= N2 (+ 16 i2)) (<= (+ i2 18) N2)), 70907#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 70933#(< i1 N1), 70929#(or (<= N2 (+ 23 i2)) (<= (+ i2 25) N2)), 70925#(or (<= N2 (+ 19 i2)) (<= (+ 21 i2) N2)), 70906#(or (<= N2 i2) (<= (+ 2 i2) N2)), 70930#(or (<= (+ i2 26) N2) (<= N2 (+ i2 24))), 70915#(or (<= (+ i2 11) N2) (<= N2 (+ 9 i2))), 70920#(or (<= N2 (+ 14 i2)) (<= (+ 16 i2) N2)), 70914#(or (<= (+ i2 10) N2) (<= N2 (+ i2 8))), 70911#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2))), 70912#(or (<= N2 (+ 6 i2)) (<= (+ i2 8) N2)), 70921#(or (<= N2 (+ i2 15)) (<= (+ i2 17) N2)), 70932#(or (<= N2 (+ i2 26)) (<= (+ i2 28) N2)), 70910#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 70908#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2))), 70909#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 70913#(or (<= (+ 9 i2) N2) (<= N2 (+ 7 i2))), 70917#(or (<= N2 (+ i2 11)) (<= (+ i2 13) N2)), 70926#(or (<= (+ 22 i2) N2) (<= N2 (+ i2 20))), 70919#(or (<= (+ i2 15) N2) (<= N2 (+ i2 13)))] [2022-03-15 21:34:10,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-15 21:34:10,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:10,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-15 21:34:10,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5503, Invalid=33503, Unknown=0, NotChecked=0, Total=39006 [2022-03-15 21:34:10,761 INFO L87 Difference]: Start difference. First operand 365 states and 832 transitions. Second operand has 87 states, 87 states have (on average 2.0229885057471266) internal successors, (176), 86 states have internal predecessors, (176), 0 states have call successors, (0), 0 states 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 21:34:14,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:14,937 INFO L93 Difference]: Finished difference Result 620 states and 1227 transitions. [2022-03-15 21:34:14,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-15 21:34:14,937 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0229885057471266) internal successors, (176), 86 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-03-15 21:34:14,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:14,939 INFO L225 Difference]: With dead ends: 620 [2022-03-15 21:34:14,939 INFO L226 Difference]: Without dead ends: 514 [2022-03-15 21:34:14,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 42 SyntacticMatches, 29 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27043 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=15556, Invalid=63124, Unknown=0, NotChecked=0, Total=78680 [2022-03-15 21:34:14,943 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 596 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 2273 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 2273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:14,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [596 Valid, 0 Invalid, 2434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 2273 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 21:34:14,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-03-15 21:34:14,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 208. [2022-03-15 21:34:14,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.1207729468599035) internal successors, (439), 207 states have internal predecessors, (439), 0 states have call successors, (0), 0 states 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 21:34:14,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 439 transitions. [2022-03-15 21:34:14,946 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 439 transitions. Word has length 63 [2022-03-15 21:34:14,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:14,947 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 439 transitions. [2022-03-15 21:34:14,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.0229885057471266) internal successors, (176), 86 states have internal predecessors, (176), 0 states have call successors, (0), 0 states 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 21:34:14,947 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 439 transitions. [2022-03-15 21:34:14,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-15 21:34:14,947 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:14,947 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:14,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-03-15 21:34:15,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:15,170 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:15,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:15,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1840092332, now seen corresponding path program 81 times [2022-03-15 21:34:15,171 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:15,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334945356] [2022-03-15 21:34:15,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:15,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:15,818 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 379 proven. 405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:15,819 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:15,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334945356] [2022-03-15 21:34:15,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334945356] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:15,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516576674] [2022-03-15 21:34:15,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:34:15,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:15,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:15,820 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:34:15,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-15 21:34:15,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-03-15 21:34:15,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:15,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 21:34:15,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:17,822 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 379 proven. 405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:17,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:20,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516576674] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:20,216 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:20,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 57, 57] total 141 [2022-03-15 21:34:20,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [804481832] [2022-03-15 21:34:20,217 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:20,224 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:20,275 INFO L252 McrAutomatonBuilder]: Finished intersection with 94 states and 123 transitions. [2022-03-15 21:34:20,275 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:20,833 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [72650#(< i2 N2)] [2022-03-15 21:34:20,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 21:34:20,833 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:20,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 21:34:20,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4663, Invalid=15643, Unknown=0, NotChecked=0, Total=20306 [2022-03-15 21:34:20,834 INFO L87 Difference]: Start difference. First operand 208 states and 439 transitions. Second operand has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 21:34:23,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:23,335 INFO L93 Difference]: Finished difference Result 398 states and 786 transitions. [2022-03-15 21:34:23,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-15 21:34:23,335 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-03-15 21:34:23,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:23,337 INFO L225 Difference]: With dead ends: 398 [2022-03-15 21:34:23,337 INFO L226 Difference]: Without dead ends: 397 [2022-03-15 21:34:23,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 43 SyntacticMatches, 27 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17395 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=11735, Invalid=38217, Unknown=0, NotChecked=0, Total=49952 [2022-03-15 21:34:23,340 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 330 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:23,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 0 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:34:23,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-03-15 21:34:23,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 181. [2022-03-15 21:34:23,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.138888888888889) internal successors, (385), 180 states have internal predecessors, (385), 0 states have call successors, (0), 0 states 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 21:34:23,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 385 transitions. [2022-03-15 21:34:23,344 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 385 transitions. Word has length 63 [2022-03-15 21:34:23,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:23,344 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 385 transitions. [2022-03-15 21:34:23,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 21:34:23,344 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 385 transitions. [2022-03-15 21:34:23,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-15 21:34:23,344 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:23,344 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:23,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-15 21:34:23,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-03-15 21:34:23,545 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:23,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:23,545 INFO L85 PathProgramCache]: Analyzing trace with hash -927981816, now seen corresponding path program 82 times [2022-03-15 21:34:23,546 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:23,546 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208782892] [2022-03-15 21:34:23,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:23,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 811 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:34:24,112 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:24,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208782892] [2022-03-15 21:34:24,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208782892] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:24,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632364153] [2022-03-15 21:34:24,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:34:24,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:24,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:24,113 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:34:24,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-15 21:34:24,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:34:24,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:24,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 115 conjunts are in the unsatisfiable core [2022-03-15 21:34:24,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:24,376 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 811 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:34:24,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 811 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:34:24,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632364153] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:24,589 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:24,589 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 29 [2022-03-15 21:34:24,590 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2140088305] [2022-03-15 21:34:24,590 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:24,597 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:24,703 INFO L252 McrAutomatonBuilder]: Finished intersection with 152 states and 238 transitions. [2022-03-15 21:34:24,703 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:27,431 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 28 new interpolants: [74000#(and (or (<= counter (* 19 C)) (<= counter 0)) (or (<= (* 19 C) counter) (<= counter (* C 18)))), 73985#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter))), 73994#(and (or (<= counter 0) (<= counter (* C 13))) (or (<= counter (* C 12)) (<= (* C 13) counter))), 73997#(and (or (<= counter 0) (<= counter (* 16 C))) (or (<= (* 16 C) counter) (<= counter (* C 15)))), 73993#(and (or (<= counter (* C 11)) (<= (* C 12) counter)) (or (<= counter (* C 12)) (<= counter 0))), 73998#(and (or (<= counter 0) (<= counter (* C 17))) (or (<= (* C 17) counter) (<= counter (* 16 C)))), 74005#(and (or (<= (* C 24) counter) (<= counter (* 23 C))) (or (<= counter (* C 24)) (<= counter 0))), 73989#(and (or (<= counter 0) (<= counter (* C 8))) (or (<= (* C 8) counter) (<= counter (* 7 C)))), 73987#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C)))), 74008#(and (or (<= (* C 27) counter) (<= counter (* C 26))) (or (<= counter (* C 27)) (<= counter 0))), 73984#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 73986#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter))), 73995#(and (or (<= (* 14 C) counter) (<= counter (* C 13))) (or (<= counter 0) (<= counter (* 14 C)))), 73988#(and (or (<= counter 0) (<= counter (* 7 C))) (or (<= counter (* 6 C)) (<= (* 7 C) counter))), 74003#(and (or (<= (* 22 C) counter) (<= counter (* 21 C))) (or (<= counter 0) (<= counter (* 22 C)))), 74007#(and (or (<= counter (* C 25)) (<= (* C 26) counter)) (or (<= counter 0) (<= counter (* C 26)))), 73999#(and (or (<= counter (* C 17)) (<= (* C 18) counter)) (or (<= counter 0) (<= counter (* C 18)))), 74009#(and (or (<= counter 0) (<= counter (* C 28))) (or (<= counter (* C 27)) (<= (* C 28) counter))), 73990#(and (or (<= (* 9 C) counter) (<= counter (* C 8))) (or (<= counter 0) (<= counter (* 9 C)))), 73996#(and (or (<= (* C 15) counter) (<= counter (* 14 C))) (or (<= counter 0) (<= counter (* C 15)))), 73983#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 73982#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 74006#(and (or (<= counter (* C 24)) (<= (* C 25) counter)) (or (<= counter 0) (<= counter (* C 25)))), 73991#(and (or (<= (* C 10) counter) (<= counter (* 9 C))) (or (<= counter (* C 10)) (<= counter 0))), 73992#(and (or (<= counter (* C 10)) (<= (* C 11) counter)) (or (<= counter 0) (<= counter (* C 11)))), 74002#(and (or (<= counter 0) (<= counter (* 21 C))) (or (<= (* 21 C) counter) (<= counter (* C 20)))), 74001#(and (or (<= counter 0) (<= counter (* C 20))) (or (<= (* C 20) counter) (<= counter (* 19 C)))), 74004#(and (or (<= counter 0) (<= counter (* 23 C))) (or (<= (* 23 C) counter) (<= counter (* 22 C))))] [2022-03-15 21:34:27,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-15 21:34:27,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:27,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-15 21:34:27,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=927, Invalid=2495, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 21:34:27,432 INFO L87 Difference]: Start difference. First operand 181 states and 385 transitions. Second operand has 59 states, 58 states have (on average 3.0517241379310347) internal successors, (177), 58 states have internal predecessors, (177), 0 states have call successors, (0), 0 states 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 21:34:29,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:29,009 INFO L93 Difference]: Finished difference Result 581 states and 1126 transitions. [2022-03-15 21:34:29,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 21:34:29,009 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 3.0517241379310347) internal successors, (177), 58 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-03-15 21:34:29,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:29,011 INFO L225 Difference]: With dead ends: 581 [2022-03-15 21:34:29,011 INFO L226 Difference]: Without dead ends: 519 [2022-03-15 21:34:29,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 210 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=927, Invalid=2495, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 21:34:29,012 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 425 mSDsluCounter, 2761 mSDsCounter, 0 mSdLazyCounter, 4612 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 4612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:29,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 0 Invalid, 4729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 4612 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-15 21:34:29,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-03-15 21:34:29,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 378. [2022-03-15 21:34:29,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.286472148541114) internal successors, (862), 377 states have internal predecessors, (862), 0 states have call successors, (0), 0 states 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 21:34:29,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 862 transitions. [2022-03-15 21:34:29,017 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 862 transitions. Word has length 64 [2022-03-15 21:34:29,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:29,018 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 862 transitions. [2022-03-15 21:34:29,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 3.0517241379310347) internal successors, (177), 58 states have internal predecessors, (177), 0 states have call successors, (0), 0 states 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 21:34:29,018 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 862 transitions. [2022-03-15 21:34:29,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-15 21:34:29,018 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:29,018 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:29,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-03-15 21:34:29,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:29,227 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:29,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:29,228 INFO L85 PathProgramCache]: Analyzing trace with hash -777921342, now seen corresponding path program 83 times [2022-03-15 21:34:29,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:29,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946062780] [2022-03-15 21:34:29,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:29,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:29,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 406 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:30,574 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:30,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946062780] [2022-03-15 21:34:30,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946062780] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:30,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640489818] [2022-03-15 21:34:30,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:34:30,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:30,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:30,577 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:34:30,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-15 21:34:30,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-03-15 21:34:30,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:30,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-15 21:34:30,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:33,225 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 406 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:33,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:36,073 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 406 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:36,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640489818] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:36,073 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:36,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 175 [2022-03-15 21:34:36,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1211743245] [2022-03-15 21:34:36,073 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:36,082 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:36,162 INFO L252 McrAutomatonBuilder]: Finished intersection with 154 states and 241 transitions. [2022-03-15 21:34:36,163 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:39,135 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 29 new interpolants: [75914#(or (<= (+ 9 i2) N2) (<= N2 (+ 7 i2))), 75916#(or (<= (+ i2 11) N2) (<= N2 (+ 9 i2))), 75922#(or (<= N2 (+ i2 15)) (<= (+ i2 17) N2)), 75917#(or (<= N2 (+ i2 10)) (<= (+ i2 12) N2)), 75918#(or (<= N2 (+ i2 11)) (<= (+ i2 13) N2)), 75932#(or (<= (+ i2 27) N2) (<= N2 (+ i2 25))), 75926#(or (<= N2 (+ 19 i2)) (<= (+ 21 i2) N2)), 75915#(or (<= (+ i2 10) N2) (<= N2 (+ i2 8))), 75928#(or (<= (+ 23 i2) N2) (<= N2 (+ 21 i2))), 75931#(or (<= (+ i2 26) N2) (<= N2 (+ i2 24))), 75912#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2))), 75930#(or (<= N2 (+ 23 i2)) (<= (+ i2 25) N2)), 75935#(< i1 N1), 75920#(or (<= (+ i2 15) N2) (<= N2 (+ i2 13))), 75921#(or (<= N2 (+ 14 i2)) (<= (+ 16 i2) N2)), 75925#(or (<= (+ i2 20) N2) (<= N2 (+ i2 18))), 75913#(or (<= N2 (+ 6 i2)) (<= (+ i2 8) N2)), 75933#(or (<= N2 (+ i2 26)) (<= (+ i2 28) N2)), 75923#(or (<= N2 (+ 16 i2)) (<= (+ i2 18) N2)), 75910#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 75924#(or (<= N2 (+ i2 17)) (<= (+ 19 i2) N2)), 75908#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 75929#(or (<= N2 (+ 22 i2)) (<= (+ i2 24) N2)), 75927#(or (<= (+ 22 i2) N2) (<= N2 (+ i2 20))), 75934#(or (<= (+ 29 i2) N2) (<= N2 (+ i2 27))), 75919#(or (<= N2 (+ i2 12)) (<= (+ 14 i2) N2)), 75911#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 75907#(or (<= N2 i2) (<= (+ 2 i2) N2)), 75909#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2)))] [2022-03-15 21:34:39,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-03-15 21:34:39,136 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:39,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-03-15 21:34:39,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=35932, Unknown=0, NotChecked=0, Total=41820 [2022-03-15 21:34:39,138 INFO L87 Difference]: Start difference. First operand 378 states and 862 transitions. Second operand has 90 states, 90 states have (on average 2.022222222222222) internal successors, (182), 89 states have internal predecessors, (182), 0 states have call successors, (0), 0 states 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 21:34:43,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:43,647 INFO L93 Difference]: Finished difference Result 642 states and 1271 transitions. [2022-03-15 21:34:43,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-15 21:34:43,648 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.022222222222222) internal successors, (182), 89 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-03-15 21:34:43,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:43,649 INFO L225 Difference]: With dead ends: 642 [2022-03-15 21:34:43,649 INFO L226 Difference]: Without dead ends: 532 [2022-03-15 21:34:43,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 43 SyntacticMatches, 30 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29038 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=16677, Invalid=67713, Unknown=0, NotChecked=0, Total=84390 [2022-03-15 21:34:43,653 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 628 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 2545 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 2545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:43,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [628 Valid, 0 Invalid, 2709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 2545 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 21:34:43,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-03-15 21:34:43,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 215. [2022-03-15 21:34:43,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.121495327102804) internal successors, (454), 214 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:43,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 454 transitions. [2022-03-15 21:34:43,657 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 454 transitions. Word has length 65 [2022-03-15 21:34:43,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:43,657 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 454 transitions. [2022-03-15 21:34:43,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.022222222222222) internal successors, (182), 89 states have internal predecessors, (182), 0 states have call successors, (0), 0 states 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 21:34:43,658 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 454 transitions. [2022-03-15 21:34:43,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-15 21:34:43,658 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:43,658 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:43,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-15 21:34:43,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:43,859 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:43,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:43,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1413578154, now seen corresponding path program 84 times [2022-03-15 21:34:43,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:43,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853164981] [2022-03-15 21:34:43,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:43,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:43,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:44,429 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 407 proven. 434 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:44,429 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:44,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853164981] [2022-03-15 21:34:44,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853164981] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:44,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846611197] [2022-03-15 21:34:44,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:34:44,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:44,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:44,431 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:34:44,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-15 21:34:44,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-03-15 21:34:44,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:44,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-15 21:34:44,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:46,564 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 407 proven. 434 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:46,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:49,128 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:49,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846611197] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:49,129 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:49,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 59, 59] total 146 [2022-03-15 21:34:49,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [998891266] [2022-03-15 21:34:49,129 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:49,137 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:49,196 INFO L252 McrAutomatonBuilder]: Finished intersection with 97 states and 127 transitions. [2022-03-15 21:34:49,196 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:49,765 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [77711#(< i2 N2)] [2022-03-15 21:34:49,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 21:34:49,765 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:49,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 21:34:49,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4989, Invalid=16767, Unknown=0, NotChecked=0, Total=21756 [2022-03-15 21:34:49,767 INFO L87 Difference]: Start difference. First operand 215 states and 454 transitions. Second operand has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 21:34:52,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:52,435 INFO L93 Difference]: Finished difference Result 412 states and 814 transitions. [2022-03-15 21:34:52,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-03-15 21:34:52,435 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-03-15 21:34:52,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:52,436 INFO L225 Difference]: With dead ends: 412 [2022-03-15 21:34:52,436 INFO L226 Difference]: Without dead ends: 411 [2022-03-15 21:34:52,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 44 SyntacticMatches, 28 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18697 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=12575, Invalid=41017, Unknown=0, NotChecked=0, Total=53592 [2022-03-15 21:34:52,439 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 219 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:52,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 0 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:34:52,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-03-15 21:34:52,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 187. [2022-03-15 21:34:52,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.139784946236559) internal successors, (398), 186 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:52,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 398 transitions. [2022-03-15 21:34:52,442 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 398 transitions. Word has length 65 [2022-03-15 21:34:52,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:52,442 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 398 transitions. [2022-03-15 21:34:52,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 21:34:52,442 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 398 transitions. [2022-03-15 21:34:52,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-15 21:34:52,443 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:52,443 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:52,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-15 21:34:52,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:52,643 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:52,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:52,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1629970054, now seen corresponding path program 85 times [2022-03-15 21:34:52,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:52,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169518204] [2022-03-15 21:34:52,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:52,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:52,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:53,225 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 869 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:34:53,226 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:53,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169518204] [2022-03-15 21:34:53,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169518204] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:53,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956046931] [2022-03-15 21:34:53,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:34:53,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:53,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:53,227 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:34:53,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-15 21:34:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:53,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 119 conjunts are in the unsatisfiable core [2022-03-15 21:34:53,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:53,512 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 869 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:34:53,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:53,733 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 869 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:34:53,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956046931] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:53,734 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:53,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 30 [2022-03-15 21:34:53,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1739727519] [2022-03-15 21:34:53,734 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:53,742 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:53,832 INFO L252 McrAutomatonBuilder]: Finished intersection with 157 states and 246 transitions. [2022-03-15 21:34:53,832 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:56,824 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 29 new interpolants: [79113#(and (or (<= counter (* C 25)) (<= (* C 26) counter)) (or (<= counter 0) (<= counter (* C 26)))), 79090#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 79099#(and (or (<= counter (* C 11)) (<= (* C 12) counter)) (or (<= counter (* C 12)) (<= counter 0))), 79114#(and (or (<= (* C 27) counter) (<= counter (* C 26))) (or (<= counter (* C 27)) (<= counter 0))), 79097#(and (or (<= (* C 10) counter) (<= counter (* 9 C))) (or (<= counter (* C 10)) (<= counter 0))), 79093#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C)))), 79091#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter))), 79094#(and (or (<= counter 0) (<= counter (* 7 C))) (or (<= counter (* 6 C)) (<= (* 7 C) counter))), 79111#(and (or (<= (* C 24) counter) (<= counter (* 23 C))) (or (<= counter (* C 24)) (<= counter 0))), 79110#(and (or (<= counter 0) (<= counter (* 23 C))) (or (<= (* 23 C) counter) (<= counter (* 22 C)))), 79107#(and (or (<= counter 0) (<= counter (* C 20))) (or (<= (* C 20) counter) (<= counter (* 19 C)))), 79101#(and (or (<= (* 14 C) counter) (<= counter (* C 13))) (or (<= counter 0) (<= counter (* 14 C)))), 79109#(and (or (<= (* 22 C) counter) (<= counter (* 21 C))) (or (<= counter 0) (<= counter (* 22 C)))), 79112#(and (or (<= counter (* C 24)) (<= (* C 25) counter)) (or (<= counter 0) (<= counter (* C 25)))), 79088#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 79089#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 79096#(and (or (<= (* 9 C) counter) (<= counter (* C 8))) (or (<= counter 0) (<= counter (* 9 C)))), 79098#(and (or (<= counter (* C 10)) (<= (* C 11) counter)) (or (<= counter 0) (<= counter (* C 11)))), 79106#(and (or (<= counter (* 19 C)) (<= counter 0)) (or (<= (* 19 C) counter) (<= counter (* C 18)))), 79102#(and (or (<= (* C 15) counter) (<= counter (* 14 C))) (or (<= counter 0) (<= counter (* C 15)))), 79115#(and (or (<= counter 0) (<= counter (* C 28))) (or (<= counter (* C 27)) (<= (* C 28) counter))), 79092#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter))), 79103#(and (or (<= counter 0) (<= counter (* 16 C))) (or (<= (* 16 C) counter) (<= counter (* C 15)))), 79108#(and (or (<= counter 0) (<= counter (* 21 C))) (or (<= (* 21 C) counter) (<= counter (* C 20)))), 79100#(and (or (<= counter 0) (<= counter (* C 13))) (or (<= counter (* C 12)) (<= (* C 13) counter))), 79095#(and (or (<= counter 0) (<= counter (* C 8))) (or (<= (* C 8) counter) (<= counter (* 7 C)))), 79105#(and (or (<= counter (* C 17)) (<= (* C 18) counter)) (or (<= counter 0) (<= counter (* C 18)))), 79116#(and (or (<= counter (* C 28)) (<= (* 29 C) counter)) (or (<= counter 0) (<= counter (* 29 C)))), 79104#(and (or (<= counter 0) (<= counter (* C 17))) (or (<= (* C 17) counter) (<= counter (* 16 C))))] [2022-03-15 21:34:56,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-15 21:34:56,824 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:56,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-15 21:34:56,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=989, Invalid=2671, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 21:34:56,825 INFO L87 Difference]: Start difference. First operand 187 states and 398 transitions. Second operand has 61 states, 60 states have (on average 3.05) internal successors, (183), 60 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 21:34:58,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:58,602 INFO L93 Difference]: Finished difference Result 601 states and 1165 transitions. [2022-03-15 21:34:58,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 21:34:58,607 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 3.05) internal successors, (183), 60 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-03-15 21:34:58,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:58,609 INFO L225 Difference]: With dead ends: 601 [2022-03-15 21:34:58,609 INFO L226 Difference]: Without dead ends: 537 [2022-03-15 21:34:58,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 217 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=989, Invalid=2671, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 21:34:58,609 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 577 mSDsluCounter, 2985 mSDsCounter, 0 mSdLazyCounter, 4974 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 4974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:58,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [577 Valid, 0 Invalid, 5115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 4974 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-15 21:34:58,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-03-15 21:34:58,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 391. [2022-03-15 21:34:58,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.287179487179487) internal successors, (892), 390 states have internal predecessors, (892), 0 states have call successors, (0), 0 states 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 21:34:58,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 892 transitions. [2022-03-15 21:34:58,616 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 892 transitions. Word has length 66 [2022-03-15 21:34:58,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:58,616 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 892 transitions. [2022-03-15 21:34:58,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 3.05) internal successors, (183), 60 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 21:34:58,617 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 892 transitions. [2022-03-15 21:34:58,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-15 21:34:58,617 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:58,617 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:58,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-03-15 21:34:58,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:58,831 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:58,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:58,832 INFO L85 PathProgramCache]: Analyzing trace with hash -190802496, now seen corresponding path program 86 times [2022-03-15 21:34:58,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:58,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203098292] [2022-03-15 21:34:58,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:58,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:58,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 435 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:00,228 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:00,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203098292] [2022-03-15 21:35:00,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203098292] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:00,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768973827] [2022-03-15 21:35:00,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:35:00,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:00,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:00,229 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:35:00,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-15 21:35:00,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:35:00,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:00,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-15 21:35:00,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 435 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:03,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:06,082 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 435 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:06,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768973827] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:06,082 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:06,082 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 181 [2022-03-15 21:35:06,082 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1203660963] [2022-03-15 21:35:06,082 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:06,091 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:06,180 INFO L252 McrAutomatonBuilder]: Finished intersection with 159 states and 249 transitions. [2022-03-15 21:35:06,180 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:09,334 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 30 new interpolants: [81083#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2))), 81086#(or (<= (+ i2 10) N2) (<= N2 (+ i2 8))), 81099#(or (<= (+ 23 i2) N2) (<= N2 (+ 21 i2))), 81090#(or (<= N2 (+ i2 12)) (<= (+ 14 i2) N2)), 81097#(or (<= N2 (+ 19 i2)) (<= (+ 21 i2) N2)), 81106#(or (<= N2 (+ i2 28)) (<= (+ 30 i2) N2)), 81085#(or (<= (+ 9 i2) N2) (<= N2 (+ 7 i2))), 81088#(or (<= N2 (+ i2 10)) (<= (+ i2 12) N2)), 81105#(or (<= (+ 29 i2) N2) (<= N2 (+ i2 27))), 81094#(or (<= N2 (+ 16 i2)) (<= (+ i2 18) N2)), 81084#(or (<= N2 (+ 6 i2)) (<= (+ i2 8) N2)), 81098#(or (<= (+ 22 i2) N2) (<= N2 (+ i2 20))), 81096#(or (<= (+ i2 20) N2) (<= N2 (+ i2 18))), 81101#(or (<= N2 (+ 23 i2)) (<= (+ i2 25) N2)), 81100#(or (<= N2 (+ 22 i2)) (<= (+ i2 24) N2)), 81107#(< i1 N1), 81080#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2))), 81078#(or (<= N2 i2) (<= (+ 2 i2) N2)), 81093#(or (<= N2 (+ i2 15)) (<= (+ i2 17) N2)), 81089#(or (<= N2 (+ i2 11)) (<= (+ i2 13) N2)), 81092#(or (<= N2 (+ 14 i2)) (<= (+ 16 i2) N2)), 81082#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 81104#(or (<= N2 (+ i2 26)) (<= (+ i2 28) N2)), 81081#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 81102#(or (<= (+ i2 26) N2) (<= N2 (+ i2 24))), 81095#(or (<= N2 (+ i2 17)) (<= (+ 19 i2) N2)), 81087#(or (<= (+ i2 11) N2) (<= N2 (+ 9 i2))), 81103#(or (<= (+ i2 27) N2) (<= N2 (+ i2 25))), 81079#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 81091#(or (<= (+ i2 15) N2) (<= N2 (+ i2 13)))] [2022-03-15 21:35:09,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-15 21:35:09,334 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:09,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-15 21:35:09,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6286, Invalid=38446, Unknown=0, NotChecked=0, Total=44732 [2022-03-15 21:35:09,337 INFO L87 Difference]: Start difference. First operand 391 states and 892 transitions. Second operand has 93 states, 93 states have (on average 2.021505376344086) internal successors, (188), 92 states have internal predecessors, (188), 0 states have call successors, (0), 0 states 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 21:35:14,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:14,160 INFO L93 Difference]: Finished difference Result 664 states and 1315 transitions. [2022-03-15 21:35:14,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-15 21:35:14,160 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.021505376344086) internal successors, (188), 92 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-03-15 21:35:14,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:14,161 INFO L225 Difference]: With dead ends: 664 [2022-03-15 21:35:14,161 INFO L226 Difference]: Without dead ends: 550 [2022-03-15 21:35:14,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 44 SyntacticMatches, 31 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31104 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=17837, Invalid=72463, Unknown=0, NotChecked=0, Total=90300 [2022-03-15 21:35:14,164 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 776 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 2558 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 2558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:14,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [776 Valid, 0 Invalid, 2726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 2558 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 21:35:14,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-03-15 21:35:14,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 222. [2022-03-15 21:35:14,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.1221719457013575) internal successors, (469), 221 states have internal predecessors, (469), 0 states have call successors, (0), 0 states 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 21:35:14,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 469 transitions. [2022-03-15 21:35:14,168 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 469 transitions. Word has length 67 [2022-03-15 21:35:14,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:14,168 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 469 transitions. [2022-03-15 21:35:14,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.021505376344086) internal successors, (188), 92 states have internal predecessors, (188), 0 states have call successors, (0), 0 states 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 21:35:14,168 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 469 transitions. [2022-03-15 21:35:14,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-15 21:35:14,169 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:14,169 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:14,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-03-15 21:35:14,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:14,387 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:14,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:14,388 INFO L85 PathProgramCache]: Analyzing trace with hash -894292500, now seen corresponding path program 87 times [2022-03-15 21:35:14,389 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:14,389 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773863363] [2022-03-15 21:35:14,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:14,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:14,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 436 proven. 464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:15,028 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:15,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773863363] [2022-03-15 21:35:15,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773863363] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:15,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425520393] [2022-03-15 21:35:15,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:35:15,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:15,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:15,029 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:35:15,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-15 21:35:15,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-03-15 21:35:15,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:15,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-15 21:35:15,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:17,328 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 436 proven. 464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:17,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:20,072 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:20,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425520393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:20,072 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:20,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 61, 61] total 151 [2022-03-15 21:35:20,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2014953181] [2022-03-15 21:35:20,073 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:20,081 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:20,144 INFO L252 McrAutomatonBuilder]: Finished intersection with 100 states and 131 transitions. [2022-03-15 21:35:20,144 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:20,729 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [82942#(< i2 N2)] [2022-03-15 21:35:20,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 21:35:20,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:20,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 21:35:20,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5326, Invalid=17930, Unknown=0, NotChecked=0, Total=23256 [2022-03-15 21:35:20,732 INFO L87 Difference]: Start difference. First operand 222 states and 469 transitions. Second operand has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 33 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 21:35:23,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:23,540 INFO L93 Difference]: Finished difference Result 426 states and 842 transitions. [2022-03-15 21:35:23,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-03-15 21:35:23,540 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 33 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-03-15 21:35:23,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:23,541 INFO L225 Difference]: With dead ends: 426 [2022-03-15 21:35:23,541 INFO L226 Difference]: Without dead ends: 425 [2022-03-15 21:35:23,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 45 SyntacticMatches, 29 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20046 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=13444, Invalid=43916, Unknown=0, NotChecked=0, Total=57360 [2022-03-15 21:35:23,545 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 220 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:23,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 0 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:35:23,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-03-15 21:35:23,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 193. [2022-03-15 21:35:23,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.140625) internal successors, (411), 192 states have internal predecessors, (411), 0 states have call successors, (0), 0 states 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 21:35:23,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 411 transitions. [2022-03-15 21:35:23,548 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 411 transitions. Word has length 67 [2022-03-15 21:35:23,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:23,548 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 411 transitions. [2022-03-15 21:35:23,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 33 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 21:35:23,548 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 411 transitions. [2022-03-15 21:35:23,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-15 21:35:23,548 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:23,548 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:23,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-15 21:35:23,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-15 21:35:23,749 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:23,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:23,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1644182200, now seen corresponding path program 88 times [2022-03-15 21:35:23,750 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:23,750 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139297021] [2022-03-15 21:35:23,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:23,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:23,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:24,360 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 929 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:24,361 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:24,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139297021] [2022-03-15 21:35:24,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139297021] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:24,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327458648] [2022-03-15 21:35:24,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:35:24,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:24,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:24,362 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:35:24,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-15 21:35:24,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:35:24,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:24,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 123 conjunts are in the unsatisfiable core [2022-03-15 21:35:24,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 929 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:24,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 929 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:24,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327458648] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:24,880 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:24,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 31 [2022-03-15 21:35:24,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1844374763] [2022-03-15 21:35:24,880 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:24,889 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:25,021 INFO L252 McrAutomatonBuilder]: Finished intersection with 162 states and 254 transitions. [2022-03-15 21:35:25,022 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:28,059 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 30 new interpolants: [84383#(and (or (<= counter 0) (<= counter (* C 20))) (or (<= (* C 20) counter) (<= counter (* 19 C)))), 84375#(and (or (<= counter (* C 11)) (<= (* C 12) counter)) (or (<= counter (* C 12)) (<= counter 0))), 84377#(and (or (<= (* 14 C) counter) (<= counter (* C 13))) (or (<= counter 0) (<= counter (* 14 C)))), 84378#(and (or (<= (* C 15) counter) (<= counter (* 14 C))) (or (<= counter 0) (<= counter (* C 15)))), 84373#(and (or (<= (* C 10) counter) (<= counter (* 9 C))) (or (<= counter (* C 10)) (<= counter 0))), 84380#(and (or (<= counter 0) (<= counter (* C 17))) (or (<= (* C 17) counter) (<= counter (* 16 C)))), 84388#(and (or (<= counter (* C 24)) (<= (* C 25) counter)) (or (<= counter 0) (<= counter (* C 25)))), 84365#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 84381#(and (or (<= counter (* C 17)) (<= (* C 18) counter)) (or (<= counter 0) (<= counter (* C 18)))), 84393#(and (or (<= counter 0) (<= counter (* 30 C))) (or (<= counter (* 29 C)) (<= (* 30 C) counter))), 84382#(and (or (<= counter (* 19 C)) (<= counter 0)) (or (<= (* 19 C) counter) (<= counter (* C 18)))), 84385#(and (or (<= (* 22 C) counter) (<= counter (* 21 C))) (or (<= counter 0) (<= counter (* 22 C)))), 84370#(and (or (<= counter 0) (<= counter (* 7 C))) (or (<= counter (* 6 C)) (<= (* 7 C) counter))), 84379#(and (or (<= counter 0) (<= counter (* 16 C))) (or (<= (* 16 C) counter) (<= counter (* C 15)))), 84372#(and (or (<= (* 9 C) counter) (<= counter (* C 8))) (or (<= counter 0) (<= counter (* 9 C)))), 84366#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 84369#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C)))), 84390#(and (or (<= (* C 27) counter) (<= counter (* C 26))) (or (<= counter (* C 27)) (<= counter 0))), 84384#(and (or (<= counter 0) (<= counter (* 21 C))) (or (<= (* 21 C) counter) (<= counter (* C 20)))), 84371#(and (or (<= counter 0) (<= counter (* C 8))) (or (<= (* C 8) counter) (<= counter (* 7 C)))), 84374#(and (or (<= counter (* C 10)) (<= (* C 11) counter)) (or (<= counter 0) (<= counter (* C 11)))), 84376#(and (or (<= counter 0) (<= counter (* C 13))) (or (<= counter (* C 12)) (<= (* C 13) counter))), 84367#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter))), 84389#(and (or (<= counter (* C 25)) (<= (* C 26) counter)) (or (<= counter 0) (<= counter (* C 26)))), 84364#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 84392#(and (or (<= counter (* C 28)) (<= (* 29 C) counter)) (or (<= counter 0) (<= counter (* 29 C)))), 84386#(and (or (<= counter 0) (<= counter (* 23 C))) (or (<= (* 23 C) counter) (<= counter (* 22 C)))), 84391#(and (or (<= counter 0) (<= counter (* C 28))) (or (<= counter (* C 27)) (<= (* C 28) counter))), 84368#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter))), 84387#(and (or (<= (* C 24) counter) (<= counter (* 23 C))) (or (<= counter (* C 24)) (<= counter 0)))] [2022-03-15 21:35:28,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-15 21:35:28,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:28,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-15 21:35:28,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=2853, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 21:35:28,060 INFO L87 Difference]: Start difference. First operand 193 states and 411 transitions. Second operand has 63 states, 62 states have (on average 3.0483870967741935) internal successors, (189), 62 states have internal predecessors, (189), 0 states have call successors, (0), 0 states 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 21:35:29,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:29,729 INFO L93 Difference]: Finished difference Result 621 states and 1204 transitions. [2022-03-15 21:35:29,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 21:35:29,730 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 3.0483870967741935) internal successors, (189), 62 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-03-15 21:35:29,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:29,731 INFO L225 Difference]: With dead ends: 621 [2022-03-15 21:35:29,731 INFO L226 Difference]: Without dead ends: 555 [2022-03-15 21:35:29,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 224 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1053, Invalid=2853, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 21:35:29,731 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 562 mSDsluCounter, 2899 mSDsCounter, 0 mSdLazyCounter, 4837 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 4837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:29,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 0 Invalid, 4963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 4837 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-15 21:35:29,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-03-15 21:35:29,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 404. [2022-03-15 21:35:29,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.2878411910669976) internal successors, (922), 403 states have internal predecessors, (922), 0 states have call successors, (0), 0 states 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 21:35:29,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 922 transitions. [2022-03-15 21:35:29,736 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 922 transitions. Word has length 68 [2022-03-15 21:35:29,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:29,736 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 922 transitions. [2022-03-15 21:35:29,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 3.0483870967741935) internal successors, (189), 62 states have internal predecessors, (189), 0 states have call successors, (0), 0 states 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 21:35:29,736 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 922 transitions. [2022-03-15 21:35:29,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-15 21:35:29,736 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:29,736 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:29,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-15 21:35:29,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:29,937 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:29,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:29,937 INFO L85 PathProgramCache]: Analyzing trace with hash 940054018, now seen corresponding path program 89 times [2022-03-15 21:35:29,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:29,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420875957] [2022-03-15 21:35:29,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:29,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 465 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:31,396 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:31,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420875957] [2022-03-15 21:35:31,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420875957] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:31,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303899129] [2022-03-15 21:35:31,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:35:31,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:31,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:31,399 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:35:31,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-15 21:35:31,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-03-15 21:35:31,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:31,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-15 21:35:31,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:34,327 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 465 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:34,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:37,552 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 465 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:37,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303899129] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:37,553 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:37,553 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 187 [2022-03-15 21:35:37,553 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1090411598] [2022-03-15 21:35:37,553 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:37,562 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:37,741 INFO L252 McrAutomatonBuilder]: Finished intersection with 164 states and 257 transitions. [2022-03-15 21:35:37,741 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:41,167 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 31 new interpolants: [86449#(< i1 N1), 86425#(or (<= N2 (+ 6 i2)) (<= (+ i2 8) N2)), 86447#(or (<= N2 (+ i2 28)) (<= (+ 30 i2) N2)), 86420#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 86442#(or (<= N2 (+ 23 i2)) (<= (+ i2 25) N2)), 86439#(or (<= (+ 22 i2) N2) (<= N2 (+ i2 20))), 86419#(or (<= N2 i2) (<= (+ 2 i2) N2)), 86446#(or (<= (+ 29 i2) N2) (<= N2 (+ i2 27))), 86432#(or (<= (+ i2 15) N2) (<= N2 (+ i2 13))), 86443#(or (<= (+ i2 26) N2) (<= N2 (+ i2 24))), 86444#(or (<= (+ i2 27) N2) (<= N2 (+ i2 25))), 86426#(or (<= (+ 9 i2) N2) (<= N2 (+ 7 i2))), 86441#(or (<= N2 (+ 22 i2)) (<= (+ i2 24) N2)), 86434#(or (<= N2 (+ i2 15)) (<= (+ i2 17) N2)), 86428#(or (<= (+ i2 11) N2) (<= N2 (+ 9 i2))), 86440#(or (<= (+ 23 i2) N2) (<= N2 (+ 21 i2))), 86421#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2))), 86424#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2))), 86423#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 86431#(or (<= N2 (+ i2 12)) (<= (+ 14 i2) N2)), 86438#(or (<= N2 (+ 19 i2)) (<= (+ 21 i2) N2)), 86436#(or (<= N2 (+ i2 17)) (<= (+ 19 i2) N2)), 86427#(or (<= (+ i2 10) N2) (<= N2 (+ i2 8))), 86422#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 86430#(or (<= N2 (+ i2 11)) (<= (+ i2 13) N2)), 86437#(or (<= (+ i2 20) N2) (<= N2 (+ i2 18))), 86445#(or (<= N2 (+ i2 26)) (<= (+ i2 28) N2)), 86433#(or (<= N2 (+ 14 i2)) (<= (+ 16 i2) N2)), 86435#(or (<= N2 (+ 16 i2)) (<= (+ i2 18) N2)), 86448#(or (<= (+ i2 31) N2) (<= N2 (+ 29 i2))), 86429#(or (<= N2 (+ i2 10)) (<= (+ i2 12) N2))] [2022-03-15 21:35:41,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-03-15 21:35:41,168 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:41,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-03-15 21:35:41,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6697, Invalid=41045, Unknown=0, NotChecked=0, Total=47742 [2022-03-15 21:35:41,170 INFO L87 Difference]: Start difference. First operand 404 states and 922 transitions. Second operand has 96 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 95 states have internal predecessors, (194), 0 states have call successors, (0), 0 states 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 21:35:46,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:46,225 INFO L93 Difference]: Finished difference Result 686 states and 1359 transitions. [2022-03-15 21:35:46,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-15 21:35:46,225 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 95 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-03-15 21:35:46,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:46,226 INFO L225 Difference]: With dead ends: 686 [2022-03-15 21:35:46,226 INFO L226 Difference]: Without dead ends: 568 [2022-03-15 21:35:46,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 45 SyntacticMatches, 32 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33241 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=19036, Invalid=77374, Unknown=0, NotChecked=0, Total=96410 [2022-03-15 21:35:46,230 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 716 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 2623 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:46,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [716 Valid, 0 Invalid, 2803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 2623 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 21:35:46,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-03-15 21:35:46,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 229. [2022-03-15 21:35:46,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.1228070175438596) internal successors, (484), 228 states have internal predecessors, (484), 0 states have call successors, (0), 0 states 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 21:35:46,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 484 transitions. [2022-03-15 21:35:46,233 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 484 transitions. Word has length 69 [2022-03-15 21:35:46,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:46,234 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 484 transitions. [2022-03-15 21:35:46,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 95 states have internal predecessors, (194), 0 states have call successors, (0), 0 states 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 21:35:46,234 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 484 transitions. [2022-03-15 21:35:46,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-15 21:35:46,234 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:46,235 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:46,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-15 21:35:46,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:46,448 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:46,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:46,449 INFO L85 PathProgramCache]: Analyzing trace with hash 686202730, now seen corresponding path program 90 times [2022-03-15 21:35:46,449 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:46,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759362222] [2022-03-15 21:35:46,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:46,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:46,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:47,073 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 466 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:47,073 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:47,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759362222] [2022-03-15 21:35:47,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759362222] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:47,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97710961] [2022-03-15 21:35:47,073 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:35:47,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:47,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:47,074 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:35:47,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-15 21:35:47,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-03-15 21:35:47,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:47,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-15 21:35:47,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:49,468 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 466 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:49,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:52,365 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:52,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97710961] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:52,366 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:52,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 63, 63] total 156 [2022-03-15 21:35:52,366 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [842685477] [2022-03-15 21:35:52,366 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:52,373 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:52,440 INFO L252 McrAutomatonBuilder]: Finished intersection with 103 states and 135 transitions. [2022-03-15 21:35:52,440 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:53,046 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [88343#(< i2 N2)] [2022-03-15 21:35:53,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 21:35:53,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:53,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 21:35:53,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5674, Invalid=19132, Unknown=0, NotChecked=0, Total=24806 [2022-03-15 21:35:53,048 INFO L87 Difference]: Start difference. First operand 229 states and 484 transitions. Second operand has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 21:35:55,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:55,975 INFO L93 Difference]: Finished difference Result 440 states and 870 transitions. [2022-03-15 21:35:55,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-03-15 21:35:55,976 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-03-15 21:35:55,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:55,976 INFO L225 Difference]: With dead ends: 440 [2022-03-15 21:35:55,976 INFO L226 Difference]: Without dead ends: 439 [2022-03-15 21:35:55,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 46 SyntacticMatches, 30 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21442 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=14342, Invalid=46914, Unknown=0, NotChecked=0, Total=61256 [2022-03-15 21:35:55,981 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 241 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:55,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 0 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:35:55,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-03-15 21:35:55,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 199. [2022-03-15 21:35:55,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.1414141414141414) internal successors, (424), 198 states have internal predecessors, (424), 0 states have call successors, (0), 0 states 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 21:35:55,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 424 transitions. [2022-03-15 21:35:55,984 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 424 transitions. Word has length 69 [2022-03-15 21:35:55,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:55,984 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 424 transitions. [2022-03-15 21:35:55,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 21:35:55,984 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 424 transitions. [2022-03-15 21:35:55,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-15 21:35:55,984 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:55,984 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:56,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-15 21:35:56,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:56,185 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:56,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:56,185 INFO L85 PathProgramCache]: Analyzing trace with hash -947368634, now seen corresponding path program 91 times [2022-03-15 21:35:56,186 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:56,186 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465400251] [2022-03-15 21:35:56,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:56,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:56,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 991 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:56,834 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:56,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465400251] [2022-03-15 21:35:56,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465400251] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:56,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459220213] [2022-03-15 21:35:56,834 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:35:56,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:56,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:56,835 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:35:56,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-15 21:35:56,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:56,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 127 conjunts are in the unsatisfiable core [2022-03-15 21:35:56,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:57,117 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 991 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:57,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:57,346 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 991 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:57,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459220213] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:57,347 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:57,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 32 [2022-03-15 21:35:57,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [604890650] [2022-03-15 21:35:57,347 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:57,355 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:57,455 INFO L252 McrAutomatonBuilder]: Finished intersection with 167 states and 262 transitions. [2022-03-15 21:35:57,455 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:00,665 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 31 new interpolants: [89824#(and (or (<= (* C 15) counter) (<= counter (* 14 C))) (or (<= counter 0) (<= counter (* C 15)))), 89826#(and (or (<= counter 0) (<= counter (* C 17))) (or (<= (* C 17) counter) (<= counter (* 16 C)))), 89823#(and (or (<= (* 14 C) counter) (<= counter (* C 13))) (or (<= counter 0) (<= counter (* 14 C)))), 89836#(and (or (<= (* C 27) counter) (<= counter (* C 26))) (or (<= counter (* C 27)) (<= counter 0))), 89814#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter))), 89840#(and (or (<= counter (* C 31)) (<= counter 0)) (or (<= (* C 31) counter) (<= counter (* 30 C)))), 89827#(and (or (<= counter (* C 17)) (<= (* C 18) counter)) (or (<= counter 0) (<= counter (* C 18)))), 89822#(and (or (<= counter 0) (<= counter (* C 13))) (or (<= counter (* C 12)) (<= (* C 13) counter))), 89813#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter))), 89820#(and (or (<= counter (* C 10)) (<= (* C 11) counter)) (or (<= counter 0) (<= counter (* C 11)))), 89839#(and (or (<= counter 0) (<= counter (* 30 C))) (or (<= counter (* 29 C)) (<= (* 30 C) counter))), 89818#(and (or (<= (* 9 C) counter) (<= counter (* C 8))) (or (<= counter 0) (<= counter (* 9 C)))), 89837#(and (or (<= counter 0) (<= counter (* C 28))) (or (<= counter (* C 27)) (<= (* C 28) counter))), 89825#(and (or (<= counter 0) (<= counter (* 16 C))) (or (<= (* 16 C) counter) (<= counter (* C 15)))), 89829#(and (or (<= counter 0) (<= counter (* C 20))) (or (<= (* C 20) counter) (<= counter (* 19 C)))), 89833#(and (or (<= (* C 24) counter) (<= counter (* 23 C))) (or (<= counter (* C 24)) (<= counter 0))), 89811#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 89834#(and (or (<= counter (* C 24)) (<= (* C 25) counter)) (or (<= counter 0) (<= counter (* C 25)))), 89830#(and (or (<= counter 0) (<= counter (* 21 C))) (or (<= (* 21 C) counter) (<= counter (* C 20)))), 89838#(and (or (<= counter (* C 28)) (<= (* 29 C) counter)) (or (<= counter 0) (<= counter (* 29 C)))), 89816#(and (or (<= counter 0) (<= counter (* 7 C))) (or (<= counter (* 6 C)) (<= (* 7 C) counter))), 89819#(and (or (<= (* C 10) counter) (<= counter (* 9 C))) (or (<= counter (* C 10)) (<= counter 0))), 89835#(and (or (<= counter (* C 25)) (<= (* C 26) counter)) (or (<= counter 0) (<= counter (* C 26)))), 89831#(and (or (<= (* 22 C) counter) (<= counter (* 21 C))) (or (<= counter 0) (<= counter (* 22 C)))), 89828#(and (or (<= counter (* 19 C)) (<= counter 0)) (or (<= (* 19 C) counter) (<= counter (* C 18)))), 89812#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 89821#(and (or (<= counter (* C 11)) (<= (* C 12) counter)) (or (<= counter (* C 12)) (<= counter 0))), 89815#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C)))), 89810#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 89817#(and (or (<= counter 0) (<= counter (* C 8))) (or (<= (* C 8) counter) (<= counter (* 7 C)))), 89832#(and (or (<= counter 0) (<= counter (* 23 C))) (or (<= (* 23 C) counter) (<= counter (* 22 C))))] [2022-03-15 21:36:00,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-15 21:36:00,665 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:00,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-15 21:36:00,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1119, Invalid=3041, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:36:00,666 INFO L87 Difference]: Start difference. First operand 199 states and 424 transitions. Second operand has 65 states, 64 states have (on average 3.046875) internal successors, (195), 64 states have internal predecessors, (195), 0 states have call successors, (0), 0 states 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 21:36:02,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:02,502 INFO L93 Difference]: Finished difference Result 641 states and 1243 transitions. [2022-03-15 21:36:02,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 21:36:02,503 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 3.046875) internal successors, (195), 64 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-03-15 21:36:02,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:02,504 INFO L225 Difference]: With dead ends: 641 [2022-03-15 21:36:02,504 INFO L226 Difference]: Without dead ends: 573 [2022-03-15 21:36:02,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 231 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1119, Invalid=3041, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:36:02,504 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 598 mSDsluCounter, 3172 mSDsCounter, 0 mSdLazyCounter, 5282 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 5282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:02,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [598 Valid, 0 Invalid, 5421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 5282 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-15 21:36:02,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-03-15 21:36:02,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 417. [2022-03-15 21:36:02,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.2884615384615383) internal successors, (952), 416 states have internal predecessors, (952), 0 states have call successors, (0), 0 states 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 21:36:02,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 952 transitions. [2022-03-15 21:36:02,509 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 952 transitions. Word has length 70 [2022-03-15 21:36:02,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:02,509 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 952 transitions. [2022-03-15 21:36:02,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 3.046875) internal successors, (195), 64 states have internal predecessors, (195), 0 states have call successors, (0), 0 states 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 21:36:02,509 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 952 transitions. [2022-03-15 21:36:02,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-15 21:36:02,509 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:02,509 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:02,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-15 21:36:02,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:02,710 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:02,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:02,710 INFO L85 PathProgramCache]: Analyzing trace with hash 12539776, now seen corresponding path program 92 times [2022-03-15 21:36:02,711 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:02,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314099396] [2022-03-15 21:36:02,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:02,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:04,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 496 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:04,266 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:04,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314099396] [2022-03-15 21:36:04,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314099396] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:04,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337602925] [2022-03-15 21:36:04,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:36:04,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:04,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:04,267 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:36:04,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-15 21:36:04,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:36:04,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:04,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-15 21:36:04,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:07,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 496 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:07,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 496 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:10,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337602925] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:10,834 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:10,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65, 65] total 193 [2022-03-15 21:36:10,835 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [706924244] [2022-03-15 21:36:10,835 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:10,857 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:10,957 INFO L252 McrAutomatonBuilder]: Finished intersection with 169 states and 265 transitions. [2022-03-15 21:36:10,957 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:14,471 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 32 new interpolants: [91934#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 91952#(or (<= N2 (+ 22 i2)) (<= (+ i2 24) N2)), 91936#(or (<= N2 (+ 6 i2)) (<= (+ i2 8) N2)), 91935#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2))), 91948#(or (<= (+ i2 20) N2) (<= N2 (+ i2 18))), 91941#(or (<= N2 (+ i2 11)) (<= (+ i2 13) N2)), 91960#(or (<= (+ 32 i2) N2) (<= N2 (+ 30 i2))), 91961#(< i1 N1), 91946#(or (<= N2 (+ 16 i2)) (<= (+ i2 18) N2)), 91950#(or (<= (+ 22 i2) N2) (<= N2 (+ i2 20))), 91957#(or (<= (+ 29 i2) N2) (<= N2 (+ i2 27))), 91930#(or (<= N2 i2) (<= (+ 2 i2) N2)), 91945#(or (<= N2 (+ i2 15)) (<= (+ i2 17) N2)), 91947#(or (<= N2 (+ i2 17)) (<= (+ 19 i2) N2)), 91938#(or (<= (+ i2 10) N2) (<= N2 (+ i2 8))), 91951#(or (<= (+ 23 i2) N2) (<= N2 (+ 21 i2))), 91959#(or (<= (+ i2 31) N2) (<= N2 (+ 29 i2))), 91954#(or (<= (+ i2 26) N2) (<= N2 (+ i2 24))), 91958#(or (<= N2 (+ i2 28)) (<= (+ 30 i2) N2)), 91953#(or (<= N2 (+ 23 i2)) (<= (+ i2 25) N2)), 91932#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2))), 91955#(or (<= (+ i2 27) N2) (<= N2 (+ i2 25))), 91931#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 91937#(or (<= (+ 9 i2) N2) (<= N2 (+ 7 i2))), 91942#(or (<= N2 (+ i2 12)) (<= (+ 14 i2) N2)), 91943#(or (<= (+ i2 15) N2) (<= N2 (+ i2 13))), 91949#(or (<= N2 (+ 19 i2)) (<= (+ 21 i2) N2)), 91933#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 91940#(or (<= N2 (+ i2 10)) (<= (+ i2 12) N2)), 91939#(or (<= (+ i2 11) N2) (<= N2 (+ 9 i2))), 91944#(or (<= N2 (+ 14 i2)) (<= (+ 16 i2) N2)), 91956#(or (<= N2 (+ i2 26)) (<= (+ i2 28) N2))] [2022-03-15 21:36:14,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-03-15 21:36:14,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:14,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-03-15 21:36:14,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7121, Invalid=43729, Unknown=0, NotChecked=0, Total=50850 [2022-03-15 21:36:14,474 INFO L87 Difference]: Start difference. First operand 417 states and 952 transitions. Second operand has 99 states, 99 states have (on average 2.0202020202020203) internal successors, (200), 98 states have internal predecessors, (200), 0 states have call successors, (0), 0 states 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 21:36:19,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:19,871 INFO L93 Difference]: Finished difference Result 708 states and 1403 transitions. [2022-03-15 21:36:19,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-15 21:36:19,872 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0202020202020203) internal successors, (200), 98 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-03-15 21:36:19,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:19,872 INFO L225 Difference]: With dead ends: 708 [2022-03-15 21:36:19,872 INFO L226 Difference]: Without dead ends: 586 [2022-03-15 21:36:19,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 46 SyntacticMatches, 33 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35449 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=20274, Invalid=82446, Unknown=0, NotChecked=0, Total=102720 [2022-03-15 21:36:19,876 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 696 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 3060 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 3060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:19,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 0 Invalid, 3232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 3060 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-15 21:36:19,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-03-15 21:36:19,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 236. [2022-03-15 21:36:19,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.123404255319149) internal successors, (499), 235 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 21:36:19,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 499 transitions. [2022-03-15 21:36:19,879 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 499 transitions. Word has length 71 [2022-03-15 21:36:19,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:19,880 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 499 transitions. [2022-03-15 21:36:19,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.0202020202020203) internal successors, (200), 98 states have internal predecessors, (200), 0 states have call successors, (0), 0 states 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 21:36:19,880 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 499 transitions. [2022-03-15 21:36:19,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-15 21:36:19,880 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:19,880 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:19,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-03-15 21:36:20,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:20,081 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:20,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:20,082 INFO L85 PathProgramCache]: Analyzing trace with hash 812586796, now seen corresponding path program 93 times [2022-03-15 21:36:20,082 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:20,082 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690017320] [2022-03-15 21:36:20,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:20,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:20,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:20,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 497 proven. 527 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:20,737 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:20,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690017320] [2022-03-15 21:36:20,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690017320] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:20,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757811605] [2022-03-15 21:36:20,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:36:20,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:20,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:20,739 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:36:20,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-15 21:36:20,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-03-15 21:36:20,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:20,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-15 21:36:20,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 497 proven. 527 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:23,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:26,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:26,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757811605] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:26,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:26,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 65, 65] total 161 [2022-03-15 21:36:26,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [519574160] [2022-03-15 21:36:26,317 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:26,349 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:26,463 INFO L252 McrAutomatonBuilder]: Finished intersection with 106 states and 139 transitions. [2022-03-15 21:36:26,463 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:27,100 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [93914#(< i2 N2)] [2022-03-15 21:36:27,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 21:36:27,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:27,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 21:36:27,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6033, Invalid=20373, Unknown=0, NotChecked=0, Total=26406 [2022-03-15 21:36:27,102 INFO L87 Difference]: Start difference. First operand 236 states and 499 transitions. Second operand has 36 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 35 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 21:36:30,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:30,248 INFO L93 Difference]: Finished difference Result 454 states and 898 transitions. [2022-03-15 21:36:30,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-03-15 21:36:30,248 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 35 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-03-15 21:36:30,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:30,249 INFO L225 Difference]: With dead ends: 454 [2022-03-15 21:36:30,249 INFO L226 Difference]: Without dead ends: 453 [2022-03-15 21:36:30,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 47 SyntacticMatches, 31 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22885 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=15269, Invalid=50011, Unknown=0, NotChecked=0, Total=65280 [2022-03-15 21:36:30,253 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 276 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:30,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 0 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:36:30,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-03-15 21:36:30,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 205. [2022-03-15 21:36:30,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.142156862745098) internal successors, (437), 204 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 21:36:30,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 437 transitions. [2022-03-15 21:36:30,256 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 437 transitions. Word has length 71 [2022-03-15 21:36:30,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:30,256 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 437 transitions. [2022-03-15 21:36:30,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 35 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 21:36:30,257 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 437 transitions. [2022-03-15 21:36:30,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-15 21:36:30,257 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:30,257 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:30,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-03-15 21:36:30,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-03-15 21:36:30,458 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:30,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:30,458 INFO L85 PathProgramCache]: Analyzing trace with hash 364460936, now seen corresponding path program 94 times [2022-03-15 21:36:30,459 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:30,459 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018489625] [2022-03-15 21:36:30,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:30,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:30,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:31,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1055 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:31,128 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:31,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018489625] [2022-03-15 21:36:31,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018489625] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:31,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540822672] [2022-03-15 21:36:31,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:36:31,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:31,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:31,132 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:36:31,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-15 21:36:31,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:36:31,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:31,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 131 conjunts are in the unsatisfiable core [2022-03-15 21:36:31,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:31,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1055 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:31,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1055 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:31,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540822672] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:31,710 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:31,710 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 33 [2022-03-15 21:36:31,710 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1841083327] [2022-03-15 21:36:31,710 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:31,718 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:31,828 INFO L252 McrAutomatonBuilder]: Finished intersection with 172 states and 270 transitions. [2022-03-15 21:36:31,828 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:35,171 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 32 new interpolants: [95434#(and (or (<= (* 9 C) counter) (<= counter (* C 8))) (or (<= counter 0) (<= counter (* 9 C)))), 95443#(and (or (<= counter (* C 17)) (<= (* C 18) counter)) (or (<= counter 0) (<= counter (* C 18)))), 95430#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter))), 95447#(and (or (<= (* 22 C) counter) (<= counter (* 21 C))) (or (<= counter 0) (<= counter (* 22 C)))), 95429#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter))), 95428#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 95448#(and (or (<= counter 0) (<= counter (* 23 C))) (or (<= (* 23 C) counter) (<= counter (* 22 C)))), 95446#(and (or (<= counter 0) (<= counter (* 21 C))) (or (<= (* 21 C) counter) (<= counter (* C 20)))), 95456#(and (or (<= counter (* C 31)) (<= counter 0)) (or (<= (* C 31) counter) (<= counter (* 30 C)))), 95426#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 95436#(and (or (<= counter (* C 10)) (<= (* C 11) counter)) (or (<= counter 0) (<= counter (* C 11)))), 95449#(and (or (<= (* C 24) counter) (<= counter (* 23 C))) (or (<= counter (* C 24)) (<= counter 0))), 95431#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C)))), 95439#(and (or (<= (* 14 C) counter) (<= counter (* C 13))) (or (<= counter 0) (<= counter (* 14 C)))), 95441#(and (or (<= counter 0) (<= counter (* 16 C))) (or (<= (* 16 C) counter) (<= counter (* C 15)))), 95455#(and (or (<= counter 0) (<= counter (* 30 C))) (or (<= counter (* 29 C)) (<= (* 30 C) counter))), 95440#(and (or (<= (* C 15) counter) (<= counter (* 14 C))) (or (<= counter 0) (<= counter (* C 15)))), 95450#(and (or (<= counter (* C 24)) (<= (* C 25) counter)) (or (<= counter 0) (<= counter (* C 25)))), 95454#(and (or (<= counter (* C 28)) (<= (* 29 C) counter)) (or (<= counter 0) (<= counter (* 29 C)))), 95433#(and (or (<= counter 0) (<= counter (* C 8))) (or (<= (* C 8) counter) (<= counter (* 7 C)))), 95432#(and (or (<= counter 0) (<= counter (* 7 C))) (or (<= counter (* 6 C)) (<= (* 7 C) counter))), 95427#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 95452#(and (or (<= (* C 27) counter) (<= counter (* C 26))) (or (<= counter (* C 27)) (<= counter 0))), 95457#(and (or (<= counter (* C 31)) (<= (* 32 C) counter)) (or (<= counter (* 32 C)) (<= counter 0))), 95435#(and (or (<= (* C 10) counter) (<= counter (* 9 C))) (or (<= counter (* C 10)) (<= counter 0))), 95438#(and (or (<= counter 0) (<= counter (* C 13))) (or (<= counter (* C 12)) (<= (* C 13) counter))), 95444#(and (or (<= counter (* 19 C)) (<= counter 0)) (or (<= (* 19 C) counter) (<= counter (* C 18)))), 95445#(and (or (<= counter 0) (<= counter (* C 20))) (or (<= (* C 20) counter) (<= counter (* 19 C)))), 95451#(and (or (<= counter (* C 25)) (<= (* C 26) counter)) (or (<= counter 0) (<= counter (* C 26)))), 95442#(and (or (<= counter 0) (<= counter (* C 17))) (or (<= (* C 17) counter) (<= counter (* 16 C)))), 95453#(and (or (<= counter 0) (<= counter (* C 28))) (or (<= counter (* C 27)) (<= (* C 28) counter))), 95437#(and (or (<= counter (* C 11)) (<= (* C 12) counter)) (or (<= counter (* C 12)) (<= counter 0)))] [2022-03-15 21:36:35,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-15 21:36:35,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:35,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-15 21:36:35,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1187, Invalid=3235, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 21:36:35,172 INFO L87 Difference]: Start difference. First operand 205 states and 437 transitions. Second operand has 67 states, 66 states have (on average 3.0454545454545454) internal successors, (201), 66 states have internal predecessors, (201), 0 states have call successors, (0), 0 states 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 21:36:37,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:37,146 INFO L93 Difference]: Finished difference Result 661 states and 1282 transitions. [2022-03-15 21:36:37,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 21:36:37,146 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 3.0454545454545454) internal successors, (201), 66 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-03-15 21:36:37,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:37,148 INFO L225 Difference]: With dead ends: 661 [2022-03-15 21:36:37,148 INFO L226 Difference]: Without dead ends: 591 [2022-03-15 21:36:37,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 238 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1187, Invalid=3235, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 21:36:37,148 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 482 mSDsluCounter, 3509 mSDsCounter, 0 mSdLazyCounter, 5835 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 5835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:37,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 0 Invalid, 5957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 5835 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-15 21:36:37,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-03-15 21:36:37,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 430. [2022-03-15 21:36:37,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 2.289044289044289) internal successors, (982), 429 states have internal predecessors, (982), 0 states have call successors, (0), 0 states 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 21:36:37,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 982 transitions. [2022-03-15 21:36:37,153 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 982 transitions. Word has length 72 [2022-03-15 21:36:37,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:37,153 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 982 transitions. [2022-03-15 21:36:37,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 3.0454545454545454) internal successors, (201), 66 states have internal predecessors, (201), 0 states have call successors, (0), 0 states 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 21:36:37,153 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 982 transitions. [2022-03-15 21:36:37,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-15 21:36:37,154 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:37,154 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:37,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-15 21:36:37,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-03-15 21:36:37,354 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:37,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:37,355 INFO L85 PathProgramCache]: Analyzing trace with hash -581525694, now seen corresponding path program 95 times [2022-03-15 21:36:37,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:37,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329961062] [2022-03-15 21:36:37,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:37,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:38,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 528 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:38,968 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:38,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329961062] [2022-03-15 21:36:38,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329961062] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:38,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874393257] [2022-03-15 21:36:38,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:36:38,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:38,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:38,970 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:36:38,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-15 21:36:39,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-03-15 21:36:39,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:39,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-15 21:36:39,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 528 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:42,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:45,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 528 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:45,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874393257] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:45,907 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:45,908 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 199 [2022-03-15 21:36:45,908 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [786005673] [2022-03-15 21:36:45,908 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:45,916 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:46,060 INFO L252 McrAutomatonBuilder]: Finished intersection with 174 states and 273 transitions. [2022-03-15 21:36:46,060 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:49,758 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 33 new interpolants: [97615#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 97638#(or (<= (+ 29 i2) N2) (<= N2 (+ i2 27))), 97624#(or (<= (+ i2 15) N2) (<= N2 (+ i2 13))), 97614#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 97636#(or (<= (+ i2 27) N2) (<= N2 (+ i2 25))), 97637#(or (<= N2 (+ i2 26)) (<= (+ i2 28) N2)), 97628#(or (<= N2 (+ i2 17)) (<= (+ 19 i2) N2)), 97640#(or (<= (+ i2 31) N2) (<= N2 (+ 29 i2))), 97630#(or (<= N2 (+ 19 i2)) (<= (+ 21 i2) N2)), 97616#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2))), 97642#(or (<= (+ i2 33) N2) (<= N2 (+ i2 31))), 97619#(or (<= (+ i2 10) N2) (<= N2 (+ i2 8))), 97639#(or (<= N2 (+ i2 28)) (<= (+ 30 i2) N2)), 97632#(or (<= (+ 23 i2) N2) (<= N2 (+ 21 i2))), 97627#(or (<= N2 (+ 16 i2)) (<= (+ i2 18) N2)), 97634#(or (<= N2 (+ 23 i2)) (<= (+ i2 25) N2)), 97643#(< i1 N1), 97622#(or (<= N2 (+ i2 11)) (<= (+ i2 13) N2)), 97629#(or (<= (+ i2 20) N2) (<= N2 (+ i2 18))), 97625#(or (<= N2 (+ 14 i2)) (<= (+ 16 i2) N2)), 97623#(or (<= N2 (+ i2 12)) (<= (+ 14 i2) N2)), 97617#(or (<= N2 (+ 6 i2)) (<= (+ i2 8) N2)), 97611#(or (<= N2 i2) (<= (+ 2 i2) N2)), 97618#(or (<= (+ 9 i2) N2) (<= N2 (+ 7 i2))), 97641#(or (<= (+ 32 i2) N2) (<= N2 (+ 30 i2))), 97612#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 97621#(or (<= N2 (+ i2 10)) (<= (+ i2 12) N2)), 97631#(or (<= (+ 22 i2) N2) (<= N2 (+ i2 20))), 97620#(or (<= (+ i2 11) N2) (<= N2 (+ 9 i2))), 97633#(or (<= N2 (+ 22 i2)) (<= (+ i2 24) N2)), 97613#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2))), 97626#(or (<= N2 (+ i2 15)) (<= (+ i2 17) N2)), 97635#(or (<= (+ i2 26) N2) (<= N2 (+ i2 24)))] [2022-03-15 21:36:49,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-03-15 21:36:49,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:49,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-03-15 21:36:49,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7558, Invalid=46498, Unknown=0, NotChecked=0, Total=54056 [2022-03-15 21:36:49,761 INFO L87 Difference]: Start difference. First operand 430 states and 982 transitions. Second operand has 102 states, 102 states have (on average 2.019607843137255) internal successors, (206), 101 states have internal predecessors, (206), 0 states have call successors, (0), 0 states 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 21:36:55,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:55,604 INFO L93 Difference]: Finished difference Result 730 states and 1447 transitions. [2022-03-15 21:36:55,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-15 21:36:55,604 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.019607843137255) internal successors, (206), 101 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-03-15 21:36:55,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:55,606 INFO L225 Difference]: With dead ends: 730 [2022-03-15 21:36:55,606 INFO L226 Difference]: Without dead ends: 604 [2022-03-15 21:36:55,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 47 SyntacticMatches, 34 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37728 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=21551, Invalid=87679, Unknown=0, NotChecked=0, Total=109230 [2022-03-15 21:36:55,612 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 785 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 3007 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 3007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:55,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [785 Valid, 0 Invalid, 3196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 3007 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-15 21:36:55,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-03-15 21:36:55,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 243. [2022-03-15 21:36:55,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.12396694214876) internal successors, (514), 242 states have internal predecessors, (514), 0 states have call successors, (0), 0 states 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 21:36:55,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 514 transitions. [2022-03-15 21:36:55,616 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 514 transitions. Word has length 73 [2022-03-15 21:36:55,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:55,616 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 514 transitions. [2022-03-15 21:36:55,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.019607843137255) internal successors, (206), 101 states have internal predecessors, (206), 0 states have call successors, (0), 0 states 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 21:36:55,617 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 514 transitions. [2022-03-15 21:36:55,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-15 21:36:55,617 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:55,617 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:55,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-15 21:36:55,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:55,818 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:55,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:55,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1470369494, now seen corresponding path program 96 times [2022-03-15 21:36:55,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:55,819 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125782794] [2022-03-15 21:36:55,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:55,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:55,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:56,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 529 proven. 560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:56,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:56,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125782794] [2022-03-15 21:36:56,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125782794] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:56,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327025754] [2022-03-15 21:36:56,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:36:56,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:56,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:56,508 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:36:56,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-15 21:36:56,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-15 21:36:56,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:56,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-15 21:36:56,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 529 proven. 560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:59,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:02,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:02,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327025754] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:02,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:02,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 67, 67] total 166 [2022-03-15 21:37:02,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [69561143] [2022-03-15 21:37:02,440 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:02,448 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:02,571 INFO L252 McrAutomatonBuilder]: Finished intersection with 109 states and 143 transitions. [2022-03-15 21:37:02,571 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:03,276 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [99655#(< i2 N2)] [2022-03-15 21:37:03,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 21:37:03,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:03,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 21:37:03,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6403, Invalid=21653, Unknown=0, NotChecked=0, Total=28056 [2022-03-15 21:37:03,278 INFO L87 Difference]: Start difference. First operand 243 states and 514 transitions. Second operand has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 36 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 21:37:06,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:06,605 INFO L93 Difference]: Finished difference Result 468 states and 926 transitions. [2022-03-15 21:37:06,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-03-15 21:37:06,605 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 36 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-03-15 21:37:06,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:06,606 INFO L225 Difference]: With dead ends: 468 [2022-03-15 21:37:06,606 INFO L226 Difference]: Without dead ends: 467 [2022-03-15 21:37:06,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 48 SyntacticMatches, 32 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24375 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=16225, Invalid=53207, Unknown=0, NotChecked=0, Total=69432 [2022-03-15 21:37:06,609 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 283 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:06,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 0 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:37:06,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-03-15 21:37:06,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 211. [2022-03-15 21:37:06,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.142857142857143) internal successors, (450), 210 states have internal predecessors, (450), 0 states have call successors, (0), 0 states 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 21:37:06,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 450 transitions. [2022-03-15 21:37:06,612 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 450 transitions. Word has length 73 [2022-03-15 21:37:06,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:06,612 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 450 transitions. [2022-03-15 21:37:06,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 36 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 21:37:06,612 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 450 transitions. [2022-03-15 21:37:06,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-15 21:37:06,612 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:06,613 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:06,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-03-15 21:37:06,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:06,816 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:06,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:06,816 INFO L85 PathProgramCache]: Analyzing trace with hash -871699450, now seen corresponding path program 97 times [2022-03-15 21:37:06,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:06,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210626731] [2022-03-15 21:37:06,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:06,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:06,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:07,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1121 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:07,516 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:07,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210626731] [2022-03-15 21:37:07,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210626731] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:07,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638041351] [2022-03-15 21:37:07,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:37:07,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:07,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:07,517 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:37:07,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-15 21:37:07,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:07,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 135 conjunts are in the unsatisfiable core [2022-03-15 21:37:07,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:07,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1121 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:07,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1121 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:08,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638041351] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:08,064 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:08,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 34 [2022-03-15 21:37:08,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [641527288] [2022-03-15 21:37:08,065 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:08,074 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:08,249 INFO L252 McrAutomatonBuilder]: Finished intersection with 177 states and 278 transitions. [2022-03-15 21:37:08,249 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:11,730 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 33 new interpolants: [101227#(and (or (<= counter 0) (<= counter (* 16 C))) (or (<= (* 16 C) counter) (<= counter (* C 15)))), 101223#(and (or (<= counter (* C 11)) (<= (* C 12) counter)) (or (<= counter (* C 12)) (<= counter 0))), 101212#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 101236#(and (or (<= counter (* C 24)) (<= (* C 25) counter)) (or (<= counter 0) (<= counter (* C 25)))), 101228#(and (or (<= counter 0) (<= counter (* C 17))) (or (<= (* C 17) counter) (<= counter (* 16 C)))), 101225#(and (or (<= (* 14 C) counter) (<= counter (* C 13))) (or (<= counter 0) (<= counter (* 14 C)))), 101231#(and (or (<= counter 0) (<= counter (* C 20))) (or (<= (* C 20) counter) (<= counter (* 19 C)))), 101243#(and (or (<= counter (* C 31)) (<= (* 32 C) counter)) (or (<= counter (* 32 C)) (<= counter 0))), 101224#(and (or (<= counter 0) (<= counter (* C 13))) (or (<= counter (* C 12)) (<= (* C 13) counter))), 101215#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter))), 101221#(and (or (<= (* C 10) counter) (<= counter (* 9 C))) (or (<= counter (* C 10)) (<= counter 0))), 101218#(and (or (<= counter 0) (<= counter (* 7 C))) (or (<= counter (* 6 C)) (<= (* 7 C) counter))), 101214#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 101222#(and (or (<= counter (* C 10)) (<= (* C 11) counter)) (or (<= counter 0) (<= counter (* C 11)))), 101217#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C)))), 101230#(and (or (<= counter (* 19 C)) (<= counter 0)) (or (<= (* 19 C) counter) (<= counter (* C 18)))), 101237#(and (or (<= counter (* C 25)) (<= (* C 26) counter)) (or (<= counter 0) (<= counter (* C 26)))), 101241#(and (or (<= counter 0) (<= counter (* 30 C))) (or (<= counter (* 29 C)) (<= (* 30 C) counter))), 101234#(and (or (<= counter 0) (<= counter (* 23 C))) (or (<= (* 23 C) counter) (<= counter (* 22 C)))), 101244#(and (or (<= counter 0) (<= counter (* C 33))) (or (<= counter (* 32 C)) (<= (* C 33) counter))), 101213#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 101216#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter))), 101229#(and (or (<= counter (* C 17)) (<= (* C 18) counter)) (or (<= counter 0) (<= counter (* C 18)))), 101235#(and (or (<= (* C 24) counter) (<= counter (* 23 C))) (or (<= counter (* C 24)) (<= counter 0))), 101240#(and (or (<= counter (* C 28)) (<= (* 29 C) counter)) (or (<= counter 0) (<= counter (* 29 C)))), 101239#(and (or (<= counter 0) (<= counter (* C 28))) (or (<= counter (* C 27)) (<= (* C 28) counter))), 101242#(and (or (<= counter (* C 31)) (<= counter 0)) (or (<= (* C 31) counter) (<= counter (* 30 C)))), 101219#(and (or (<= counter 0) (<= counter (* C 8))) (or (<= (* C 8) counter) (<= counter (* 7 C)))), 101233#(and (or (<= (* 22 C) counter) (<= counter (* 21 C))) (or (<= counter 0) (<= counter (* 22 C)))), 101226#(and (or (<= (* C 15) counter) (<= counter (* 14 C))) (or (<= counter 0) (<= counter (* C 15)))), 101238#(and (or (<= (* C 27) counter) (<= counter (* C 26))) (or (<= counter (* C 27)) (<= counter 0))), 101220#(and (or (<= (* 9 C) counter) (<= counter (* C 8))) (or (<= counter 0) (<= counter (* 9 C)))), 101232#(and (or (<= counter 0) (<= counter (* 21 C))) (or (<= (* 21 C) counter) (<= counter (* C 20))))] [2022-03-15 21:37:11,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-15 21:37:11,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:11,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-15 21:37:11,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1257, Invalid=3435, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 21:37:11,731 INFO L87 Difference]: Start difference. First operand 211 states and 450 transitions. Second operand has 69 states, 68 states have (on average 3.0441176470588234) internal successors, (207), 68 states have internal predecessors, (207), 0 states have call successors, (0), 0 states 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 21:37:14,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:14,012 INFO L93 Difference]: Finished difference Result 681 states and 1321 transitions. [2022-03-15 21:37:14,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 21:37:14,012 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 3.0441176470588234) internal successors, (207), 68 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-03-15 21:37:14,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:14,013 INFO L225 Difference]: With dead ends: 681 [2022-03-15 21:37:14,013 INFO L226 Difference]: Without dead ends: 609 [2022-03-15 21:37:14,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 245 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1257, Invalid=3435, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 21:37:14,014 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 514 mSDsluCounter, 3951 mSDsCounter, 0 mSdLazyCounter, 6550 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 6550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:14,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [514 Valid, 0 Invalid, 6684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 6550 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-15 21:37:14,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2022-03-15 21:37:14,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 443. [2022-03-15 21:37:14,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 2.2895927601809953) internal successors, (1012), 442 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states 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 21:37:14,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1012 transitions. [2022-03-15 21:37:14,020 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1012 transitions. Word has length 74 [2022-03-15 21:37:14,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:14,020 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 1012 transitions. [2022-03-15 21:37:14,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 3.0441176470588234) internal successors, (207), 68 states have internal predecessors, (207), 0 states have call successors, (0), 0 states 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 21:37:14,020 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1012 transitions. [2022-03-15 21:37:14,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-15 21:37:14,021 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:14,021 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:14,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-15 21:37:14,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-03-15 21:37:14,235 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:14,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:14,236 INFO L85 PathProgramCache]: Analyzing trace with hash 568215872, now seen corresponding path program 98 times [2022-03-15 21:37:14,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:14,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122906660] [2022-03-15 21:37:14,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:14,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:14,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 561 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:15,962 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:15,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122906660] [2022-03-15 21:37:15,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122906660] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:15,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846022269] [2022-03-15 21:37:15,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:37:15,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:15,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:15,963 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:37:15,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-15 21:37:16,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:37:16,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:16,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-15 21:37:16,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:19,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 561 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:19,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:23,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 561 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:23,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846022269] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:23,334 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:23,334 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 205 [2022-03-15 21:37:23,334 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1944300060] [2022-03-15 21:37:23,334 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:23,343 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:23,462 INFO L252 McrAutomatonBuilder]: Finished intersection with 179 states and 281 transitions. [2022-03-15 21:37:23,462 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:27,369 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 34 new interpolants: [103486#(or (<= (+ i2 26) N2) (<= N2 (+ i2 24))), 103478#(or (<= N2 (+ 16 i2)) (<= (+ i2 18) N2)), 103467#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2))), 103474#(or (<= N2 (+ i2 12)) (<= (+ 14 i2) N2)), 103480#(or (<= (+ i2 20) N2) (<= N2 (+ i2 18))), 103482#(or (<= (+ 22 i2) N2) (<= N2 (+ i2 20))), 103464#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2))), 103476#(or (<= N2 (+ 14 i2)) (<= (+ 16 i2) N2)), 103477#(or (<= N2 (+ i2 15)) (<= (+ i2 17) N2)), 103483#(or (<= (+ 23 i2) N2) (<= N2 (+ 21 i2))), 103471#(or (<= (+ i2 11) N2) (<= N2 (+ 9 i2))), 103495#(< i1 N1), 103472#(or (<= N2 (+ i2 10)) (<= (+ i2 12) N2)), 103489#(or (<= (+ 29 i2) N2) (<= N2 (+ i2 27))), 103475#(or (<= (+ i2 15) N2) (<= N2 (+ i2 13))), 103463#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 103490#(or (<= N2 (+ i2 28)) (<= (+ 30 i2) N2)), 103494#(or (<= N2 (+ 32 i2)) (<= (+ i2 34) N2)), 103492#(or (<= (+ 32 i2) N2) (<= N2 (+ 30 i2))), 103462#(or (<= N2 i2) (<= (+ 2 i2) N2)), 103470#(or (<= (+ i2 10) N2) (<= N2 (+ i2 8))), 103468#(or (<= N2 (+ 6 i2)) (<= (+ i2 8) N2)), 103465#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 103484#(or (<= N2 (+ 22 i2)) (<= (+ i2 24) N2)), 103491#(or (<= (+ i2 31) N2) (<= N2 (+ 29 i2))), 103469#(or (<= (+ 9 i2) N2) (<= N2 (+ 7 i2))), 103473#(or (<= N2 (+ i2 11)) (<= (+ i2 13) N2)), 103485#(or (<= N2 (+ 23 i2)) (<= (+ i2 25) N2)), 103487#(or (<= (+ i2 27) N2) (<= N2 (+ i2 25))), 103493#(or (<= (+ i2 33) N2) (<= N2 (+ i2 31))), 103481#(or (<= N2 (+ 19 i2)) (<= (+ 21 i2) N2)), 103466#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 103488#(or (<= N2 (+ i2 26)) (<= (+ i2 28) N2)), 103479#(or (<= N2 (+ i2 17)) (<= (+ 19 i2) N2))] [2022-03-15 21:37:27,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-03-15 21:37:27,369 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:27,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-03-15 21:37:27,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8008, Invalid=49352, Unknown=0, NotChecked=0, Total=57360 [2022-03-15 21:37:27,372 INFO L87 Difference]: Start difference. First operand 443 states and 1012 transitions. Second operand has 105 states, 105 states have (on average 2.019047619047619) internal successors, (212), 104 states have internal predecessors, (212), 0 states have call successors, (0), 0 states 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 21:37:33,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:33,356 INFO L93 Difference]: Finished difference Result 752 states and 1491 transitions. [2022-03-15 21:37:33,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-15 21:37:33,356 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.019047619047619) internal successors, (212), 104 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-03-15 21:37:33,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:33,357 INFO L225 Difference]: With dead ends: 752 [2022-03-15 21:37:33,357 INFO L226 Difference]: Without dead ends: 622 [2022-03-15 21:37:33,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 48 SyntacticMatches, 35 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40078 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=22867, Invalid=93073, Unknown=0, NotChecked=0, Total=115940 [2022-03-15 21:37:33,362 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 860 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 3062 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 3062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:33,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [860 Valid, 0 Invalid, 3254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 3062 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-15 21:37:33,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-03-15 21:37:33,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 250. [2022-03-15 21:37:33,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.1244979919678717) internal successors, (529), 249 states have internal predecessors, (529), 0 states have call successors, (0), 0 states 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 21:37:33,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 529 transitions. [2022-03-15 21:37:33,366 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 529 transitions. Word has length 75 [2022-03-15 21:37:33,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:33,366 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 529 transitions. [2022-03-15 21:37:33,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.019047619047619) internal successors, (212), 104 states have internal predecessors, (212), 0 states have call successors, (0), 0 states 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 21:37:33,366 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 529 transitions. [2022-03-15 21:37:33,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-15 21:37:33,366 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:33,366 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:33,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-15 21:37:33,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:33,567 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:33,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:33,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1136635796, now seen corresponding path program 99 times [2022-03-15 21:37:33,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:33,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198916264] [2022-03-15 21:37:33,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:33,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:33,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:34,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 562 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:34,306 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:34,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198916264] [2022-03-15 21:37:34,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198916264] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:34,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406454497] [2022-03-15 21:37:34,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:37:34,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:34,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:34,308 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:37:34,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-15 21:37:34,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2022-03-15 21:37:34,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:34,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-15 21:37:34,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 562 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:37,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:40,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:40,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406454497] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:40,533 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:40,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 69, 69] total 171 [2022-03-15 21:37:40,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1905225111] [2022-03-15 21:37:40,533 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:40,542 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:40,657 INFO L252 McrAutomatonBuilder]: Finished intersection with 112 states and 147 transitions. [2022-03-15 21:37:40,657 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:41,355 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [105566#(< i2 N2)] [2022-03-15 21:37:41,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 21:37:41,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:41,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 21:37:41,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6784, Invalid=22972, Unknown=0, NotChecked=0, Total=29756 [2022-03-15 21:37:41,356 INFO L87 Difference]: Start difference. First operand 250 states and 529 transitions. Second operand has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 37 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 21:37:44,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:44,874 INFO L93 Difference]: Finished difference Result 482 states and 954 transitions. [2022-03-15 21:37:44,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-03-15 21:37:44,874 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 37 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-03-15 21:37:44,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:44,875 INFO L225 Difference]: With dead ends: 482 [2022-03-15 21:37:44,875 INFO L226 Difference]: Without dead ends: 481 [2022-03-15 21:37:44,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 49 SyntacticMatches, 33 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25912 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=17210, Invalid=56502, Unknown=0, NotChecked=0, Total=73712 [2022-03-15 21:37:44,879 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 236 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:44,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 0 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:37:44,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-03-15 21:37:44,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 217. [2022-03-15 21:37:44,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.1435185185185186) internal successors, (463), 216 states have internal predecessors, (463), 0 states have call successors, (0), 0 states 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 21:37:44,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 463 transitions. [2022-03-15 21:37:44,881 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 463 transitions. Word has length 75 [2022-03-15 21:37:44,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:44,881 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 463 transitions. [2022-03-15 21:37:44,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 37 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 21:37:44,882 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 463 transitions. [2022-03-15 21:37:44,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-15 21:37:44,882 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:44,882 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:44,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-03-15 21:37:45,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:45,082 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:45,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:45,083 INFO L85 PathProgramCache]: Analyzing trace with hash 410550728, now seen corresponding path program 100 times [2022-03-15 21:37:45,083 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:45,083 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212430135] [2022-03-15 21:37:45,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:45,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1189 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:45,818 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:45,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212430135] [2022-03-15 21:37:45,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212430135] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:45,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96876508] [2022-03-15 21:37:45,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:37:45,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:45,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:45,819 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:37:45,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-15 21:37:45,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:37:45,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:45,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 139 conjunts are in the unsatisfiable core [2022-03-15 21:37:45,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:46,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1189 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:46,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1189 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:46,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96876508] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:46,429 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:46,430 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 35 [2022-03-15 21:37:46,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [231981512] [2022-03-15 21:37:46,430 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:46,439 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:46,607 INFO L252 McrAutomatonBuilder]: Finished intersection with 182 states and 286 transitions. [2022-03-15 21:37:46,607 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:50,268 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 34 new interpolants: [107169#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 107196#(and (or (<= counter (* C 28)) (<= (* 29 C) counter)) (or (<= counter 0) (<= counter (* 29 C)))), 107182#(and (or (<= (* C 15) counter) (<= counter (* 14 C))) (or (<= counter 0) (<= counter (* C 15)))), 107188#(and (or (<= counter 0) (<= counter (* 21 C))) (or (<= (* 21 C) counter) (<= counter (* C 20)))), 107191#(and (or (<= (* C 24) counter) (<= counter (* 23 C))) (or (<= counter (* C 24)) (<= counter 0))), 107195#(and (or (<= counter 0) (<= counter (* C 28))) (or (<= counter (* C 27)) (<= (* C 28) counter))), 107199#(and (or (<= counter (* C 31)) (<= (* 32 C) counter)) (or (<= counter (* 32 C)) (<= counter 0))), 107187#(and (or (<= counter 0) (<= counter (* C 20))) (or (<= (* C 20) counter) (<= counter (* 19 C)))), 107181#(and (or (<= (* 14 C) counter) (<= counter (* C 13))) (or (<= counter 0) (<= counter (* 14 C)))), 107197#(and (or (<= counter 0) (<= counter (* 30 C))) (or (<= counter (* 29 C)) (<= (* 30 C) counter))), 107175#(and (or (<= counter 0) (<= counter (* C 8))) (or (<= (* C 8) counter) (<= counter (* 7 C)))), 107192#(and (or (<= counter (* C 24)) (<= (* C 25) counter)) (or (<= counter 0) (<= counter (* C 25)))), 107176#(and (or (<= (* 9 C) counter) (<= counter (* C 8))) (or (<= counter 0) (<= counter (* 9 C)))), 107185#(and (or (<= counter (* C 17)) (<= (* C 18) counter)) (or (<= counter 0) (<= counter (* C 18)))), 107179#(and (or (<= counter (* C 11)) (<= (* C 12) counter)) (or (<= counter (* C 12)) (<= counter 0))), 107174#(and (or (<= counter 0) (<= counter (* 7 C))) (or (<= counter (* 6 C)) (<= (* 7 C) counter))), 107198#(and (or (<= counter (* C 31)) (<= counter 0)) (or (<= (* C 31) counter) (<= counter (* 30 C)))), 107170#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 107200#(and (or (<= counter 0) (<= counter (* C 33))) (or (<= counter (* 32 C)) (<= (* C 33) counter))), 107183#(and (or (<= counter 0) (<= counter (* 16 C))) (or (<= (* 16 C) counter) (<= counter (* C 15)))), 107178#(and (or (<= counter (* C 10)) (<= (* C 11) counter)) (or (<= counter 0) (<= counter (* C 11)))), 107168#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 107194#(and (or (<= (* C 27) counter) (<= counter (* C 26))) (or (<= counter (* C 27)) (<= counter 0))), 107184#(and (or (<= counter 0) (<= counter (* C 17))) (or (<= (* C 17) counter) (<= counter (* 16 C)))), 107171#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter))), 107186#(and (or (<= counter (* 19 C)) (<= counter 0)) (or (<= (* 19 C) counter) (<= counter (* C 18)))), 107201#(and (or (<= (* C 34) counter) (<= counter (* C 33))) (or (<= counter (* C 34)) (<= counter 0))), 107172#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter))), 107177#(and (or (<= (* C 10) counter) (<= counter (* 9 C))) (or (<= counter (* C 10)) (<= counter 0))), 107189#(and (or (<= (* 22 C) counter) (<= counter (* 21 C))) (or (<= counter 0) (<= counter (* 22 C)))), 107193#(and (or (<= counter (* C 25)) (<= (* C 26) counter)) (or (<= counter 0) (<= counter (* C 26)))), 107180#(and (or (<= counter 0) (<= counter (* C 13))) (or (<= counter (* C 12)) (<= (* C 13) counter))), 107173#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C)))), 107190#(and (or (<= counter 0) (<= counter (* 23 C))) (or (<= (* 23 C) counter) (<= counter (* 22 C))))] [2022-03-15 21:37:50,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-15 21:37:50,269 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:50,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-15 21:37:50,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1329, Invalid=3641, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 21:37:50,269 INFO L87 Difference]: Start difference. First operand 217 states and 463 transitions. Second operand has 71 states, 70 states have (on average 3.0428571428571427) internal successors, (213), 70 states have internal predecessors, (213), 0 states have call successors, (0), 0 states 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 21:37:52,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:52,497 INFO L93 Difference]: Finished difference Result 701 states and 1360 transitions. [2022-03-15 21:37:52,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 21:37:52,497 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 3.0428571428571427) internal successors, (213), 70 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-03-15 21:37:52,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:52,498 INFO L225 Difference]: With dead ends: 701 [2022-03-15 21:37:52,498 INFO L226 Difference]: Without dead ends: 627 [2022-03-15 21:37:52,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 252 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1329, Invalid=3641, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 21:37:52,499 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 654 mSDsluCounter, 3924 mSDsCounter, 0 mSdLazyCounter, 6508 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 6508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:52,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [654 Valid, 0 Invalid, 6660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 6508 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-15 21:37:52,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-03-15 21:37:52,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 456. [2022-03-15 21:37:52,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 2.29010989010989) internal successors, (1042), 455 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states 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 21:37:52,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1042 transitions. [2022-03-15 21:37:52,504 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1042 transitions. Word has length 76 [2022-03-15 21:37:52,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:52,504 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 1042 transitions. [2022-03-15 21:37:52,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 3.0428571428571427) internal successors, (213), 70 states have internal predecessors, (213), 0 states have call successors, (0), 0 states 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 21:37:52,504 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1042 transitions. [2022-03-15 21:37:52,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-15 21:37:52,504 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:52,504 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:52,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-03-15 21:37:52,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-15 21:37:52,705 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:52,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:52,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1189705858, now seen corresponding path program 101 times [2022-03-15 21:37:52,706 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:52,706 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265805852] [2022-03-15 21:37:52,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:52,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:52,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:54,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 595 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:54,513 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:54,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265805852] [2022-03-15 21:37:54,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265805852] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:54,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371146832] [2022-03-15 21:37:54,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:37:54,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:54,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:54,514 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:37:54,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-15 21:37:54,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2022-03-15 21:37:54,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:54,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-15 21:37:54,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 595 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:58,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:38:02,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 595 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:02,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371146832] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:38:02,253 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:38:02,254 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 71, 71] total 211 [2022-03-15 21:38:02,254 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [21487754] [2022-03-15 21:38:02,254 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:38:02,263 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:38:02,427 INFO L252 McrAutomatonBuilder]: Finished intersection with 184 states and 289 transitions. [2022-03-15 21:38:02,427 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:38:06,520 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 35 new interpolants: [109504#(or (<= (+ 23 i2) N2) (<= N2 (+ 21 i2))), 109506#(or (<= N2 (+ 23 i2)) (<= (+ i2 25) N2)), 109489#(or (<= N2 (+ 6 i2)) (<= (+ i2 8) N2)), 109513#(or (<= (+ 32 i2) N2) (<= N2 (+ 30 i2))), 109488#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2))), 109503#(or (<= (+ 22 i2) N2) (<= N2 (+ i2 20))), 109487#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 109516#(or (<= (+ 35 i2) N2) (<= N2 (+ i2 33))), 109514#(or (<= (+ i2 33) N2) (<= N2 (+ i2 31))), 109484#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 109492#(or (<= (+ i2 11) N2) (<= N2 (+ 9 i2))), 109509#(or (<= N2 (+ i2 26)) (<= (+ i2 28) N2)), 109512#(or (<= (+ i2 31) N2) (<= N2 (+ 29 i2))), 109499#(or (<= N2 (+ 16 i2)) (<= (+ i2 18) N2)), 109502#(or (<= N2 (+ 19 i2)) (<= (+ 21 i2) N2)), 109500#(or (<= N2 (+ i2 17)) (<= (+ 19 i2) N2)), 109495#(or (<= N2 (+ i2 12)) (<= (+ 14 i2) N2)), 109511#(or (<= N2 (+ i2 28)) (<= (+ 30 i2) N2)), 109498#(or (<= N2 (+ i2 15)) (<= (+ i2 17) N2)), 109494#(or (<= N2 (+ i2 11)) (<= (+ i2 13) N2)), 109507#(or (<= (+ i2 26) N2) (<= N2 (+ i2 24))), 109491#(or (<= (+ i2 10) N2) (<= N2 (+ i2 8))), 109485#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2))), 109486#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 109501#(or (<= (+ i2 20) N2) (<= N2 (+ i2 18))), 109505#(or (<= N2 (+ 22 i2)) (<= (+ i2 24) N2)), 109483#(or (<= N2 i2) (<= (+ 2 i2) N2)), 109515#(or (<= N2 (+ 32 i2)) (<= (+ i2 34) N2)), 109510#(or (<= (+ 29 i2) N2) (<= N2 (+ i2 27))), 109497#(or (<= N2 (+ 14 i2)) (<= (+ 16 i2) N2)), 109490#(or (<= (+ 9 i2) N2) (<= N2 (+ 7 i2))), 109517#(< i1 N1), 109493#(or (<= N2 (+ i2 10)) (<= (+ i2 12) N2)), 109508#(or (<= (+ i2 27) N2) (<= N2 (+ i2 25))), 109496#(or (<= (+ i2 15) N2) (<= N2 (+ i2 13)))] [2022-03-15 21:38:06,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-03-15 21:38:06,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:38:06,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-03-15 21:38:06,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8471, Invalid=52291, Unknown=0, NotChecked=0, Total=60762 [2022-03-15 21:38:06,523 INFO L87 Difference]: Start difference. First operand 456 states and 1042 transitions. Second operand has 108 states, 108 states have (on average 2.0185185185185186) internal successors, (218), 107 states have internal predecessors, (218), 0 states have call successors, (0), 0 states 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 21:38:13,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:38:13,011 INFO L93 Difference]: Finished difference Result 774 states and 1535 transitions. [2022-03-15 21:38:13,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-03-15 21:38:13,011 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.0185185185185186) internal successors, (218), 107 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-03-15 21:38:13,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:38:13,012 INFO L225 Difference]: With dead ends: 774 [2022-03-15 21:38:13,012 INFO L226 Difference]: Without dead ends: 640 [2022-03-15 21:38:13,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 49 SyntacticMatches, 36 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42499 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=24222, Invalid=98628, Unknown=0, NotChecked=0, Total=122850 [2022-03-15 21:38:13,019 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 849 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 3389 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 3389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:38:13,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [849 Valid, 0 Invalid, 3591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 3389 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-15 21:38:13,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-03-15 21:38:13,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 257. [2022-03-15 21:38:13,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.125) internal successors, (544), 256 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:38:13,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 544 transitions. [2022-03-15 21:38:13,023 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 544 transitions. Word has length 77 [2022-03-15 21:38:13,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:38:13,023 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 544 transitions. [2022-03-15 21:38:13,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.0185185185185186) internal successors, (218), 107 states have internal predecessors, (218), 0 states have call successors, (0), 0 states 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 21:38:13,024 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 544 transitions. [2022-03-15 21:38:13,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-15 21:38:13,024 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:38:13,024 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:38:13,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-03-15 21:38:13,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-15 21:38:13,240 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:38:13,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:38:13,241 INFO L85 PathProgramCache]: Analyzing trace with hash -41585942, now seen corresponding path program 102 times [2022-03-15 21:38:13,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:38:13,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920863070] [2022-03-15 21:38:13,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:38:13,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:38:13,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 596 proven. 629 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:14,019 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:38:14,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920863070] [2022-03-15 21:38:14,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920863070] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:38:14,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226890190] [2022-03-15 21:38:14,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:38:14,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:14,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:38:14,020 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:38:14,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-15 21:38:14,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2022-03-15 21:38:14,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:38:14,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-15 21:38:14,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:38:17,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 596 proven. 629 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:17,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:38:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:20,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226890190] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:38:20,640 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:38:20,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 71, 71] total 176 [2022-03-15 21:38:20,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [325961162] [2022-03-15 21:38:20,641 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:38:20,650 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:38:20,739 INFO L252 McrAutomatonBuilder]: Finished intersection with 115 states and 151 transitions. [2022-03-15 21:38:20,739 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:38:21,489 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [111647#(< i2 N2)] [2022-03-15 21:38:21,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-15 21:38:21,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:38:21,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-15 21:38:21,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7176, Invalid=24330, Unknown=0, NotChecked=0, Total=31506 [2022-03-15 21:38:21,492 INFO L87 Difference]: Start difference. First operand 257 states and 544 transitions. Second operand has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 38 states have internal predecessors, (115), 0 states have call successors, (0), 0 states 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 21:38:25,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:38:25,194 INFO L93 Difference]: Finished difference Result 496 states and 982 transitions. [2022-03-15 21:38:25,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-03-15 21:38:25,194 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 38 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-03-15 21:38:25,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:38:25,195 INFO L225 Difference]: With dead ends: 496 [2022-03-15 21:38:25,195 INFO L226 Difference]: Without dead ends: 495 [2022-03-15 21:38:25,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 50 SyntacticMatches, 34 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27496 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=18224, Invalid=59896, Unknown=0, NotChecked=0, Total=78120 [2022-03-15 21:38:25,201 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 279 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:38:25,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 0 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:38:25,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-03-15 21:38:25,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 223. [2022-03-15 21:38:25,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.144144144144144) internal successors, (476), 222 states have internal predecessors, (476), 0 states have call successors, (0), 0 states 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 21:38:25,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 476 transitions. [2022-03-15 21:38:25,204 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 476 transitions. Word has length 77 [2022-03-15 21:38:25,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:38:25,204 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 476 transitions. [2022-03-15 21:38:25,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 38 states have internal predecessors, (115), 0 states have call successors, (0), 0 states 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 21:38:25,204 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 476 transitions. [2022-03-15 21:38:25,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-15 21:38:25,204 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:38:25,204 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:38:25,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-03-15 21:38:25,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:25,405 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:38:25,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:38:25,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1798096186, now seen corresponding path program 103 times [2022-03-15 21:38:25,406 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:38:25,406 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132102839] [2022-03-15 21:38:25,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:38:25,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:38:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:26,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1259 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:38:26,175 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:38:26,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132102839] [2022-03-15 21:38:26,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132102839] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:38:26,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754517928] [2022-03-15 21:38:26,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:38:26,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:26,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:38:26,176 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:38:26,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-15 21:38:26,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:26,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 143 conjunts are in the unsatisfiable core [2022-03-15 21:38:26,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:38:26,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1259 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:38:26,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:38:26,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1259 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:38:26,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754517928] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:38:26,777 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:38:26,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 36 [2022-03-15 21:38:26,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [592221642] [2022-03-15 21:38:26,777 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:38:26,786 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:38:26,924 INFO L252 McrAutomatonBuilder]: Finished intersection with 187 states and 294 transitions. [2022-03-15 21:38:26,924 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:38:30,722 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 35 new interpolants: [113306#(and (or (<= counter 0) (<= counter (* C 13))) (or (<= counter (* C 12)) (<= (* C 13) counter))), 113295#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 113322#(and (or (<= counter (* C 28)) (<= (* 29 C) counter)) (or (<= counter 0) (<= counter (* 29 C)))), 113294#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 113319#(and (or (<= counter (* C 25)) (<= (* C 26) counter)) (or (<= counter 0) (<= counter (* C 26)))), 113310#(and (or (<= counter 0) (<= counter (* C 17))) (or (<= (* C 17) counter) (<= counter (* 16 C)))), 113325#(and (or (<= counter (* C 31)) (<= (* 32 C) counter)) (or (<= counter (* 32 C)) (<= counter 0))), 113318#(and (or (<= counter (* C 24)) (<= (* C 25) counter)) (or (<= counter 0) (<= counter (* C 25)))), 113296#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 113313#(and (or (<= counter 0) (<= counter (* C 20))) (or (<= (* C 20) counter) (<= counter (* 19 C)))), 113326#(and (or (<= counter 0) (<= counter (* C 33))) (or (<= counter (* 32 C)) (<= (* C 33) counter))), 113305#(and (or (<= counter (* C 11)) (<= (* C 12) counter)) (or (<= counter (* C 12)) (<= counter 0))), 113324#(and (or (<= counter (* C 31)) (<= counter 0)) (or (<= (* C 31) counter) (<= counter (* 30 C)))), 113298#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter))), 113299#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C)))), 113323#(and (or (<= counter 0) (<= counter (* 30 C))) (or (<= counter (* 29 C)) (<= (* 30 C) counter))), 113312#(and (or (<= counter (* 19 C)) (<= counter 0)) (or (<= (* 19 C) counter) (<= counter (* C 18)))), 113317#(and (or (<= (* C 24) counter) (<= counter (* 23 C))) (or (<= counter (* C 24)) (<= counter 0))), 113327#(and (or (<= (* C 34) counter) (<= counter (* C 33))) (or (<= counter (* C 34)) (<= counter 0))), 113297#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter))), 113321#(and (or (<= counter 0) (<= counter (* C 28))) (or (<= counter (* C 27)) (<= (* C 28) counter))), 113301#(and (or (<= counter 0) (<= counter (* C 8))) (or (<= (* C 8) counter) (<= counter (* 7 C)))), 113309#(and (or (<= counter 0) (<= counter (* 16 C))) (or (<= (* 16 C) counter) (<= counter (* C 15)))), 113302#(and (or (<= (* 9 C) counter) (<= counter (* C 8))) (or (<= counter 0) (<= counter (* 9 C)))), 113314#(and (or (<= counter 0) (<= counter (* 21 C))) (or (<= (* 21 C) counter) (<= counter (* C 20)))), 113304#(and (or (<= counter (* C 10)) (<= (* C 11) counter)) (or (<= counter 0) (<= counter (* C 11)))), 113307#(and (or (<= (* 14 C) counter) (<= counter (* C 13))) (or (<= counter 0) (<= counter (* 14 C)))), 113308#(and (or (<= (* C 15) counter) (<= counter (* 14 C))) (or (<= counter 0) (<= counter (* C 15)))), 113311#(and (or (<= counter (* C 17)) (<= (* C 18) counter)) (or (<= counter 0) (<= counter (* C 18)))), 113315#(and (or (<= (* 22 C) counter) (<= counter (* 21 C))) (or (<= counter 0) (<= counter (* 22 C)))), 113303#(and (or (<= (* C 10) counter) (<= counter (* 9 C))) (or (<= counter (* C 10)) (<= counter 0))), 113316#(and (or (<= counter 0) (<= counter (* 23 C))) (or (<= (* 23 C) counter) (<= counter (* 22 C)))), 113300#(and (or (<= counter 0) (<= counter (* 7 C))) (or (<= counter (* 6 C)) (<= (* 7 C) counter))), 113328#(and (or (<= counter 0) (<= counter (* 35 C))) (or (<= counter (* C 34)) (<= (* 35 C) counter))), 113320#(and (or (<= (* C 27) counter) (<= counter (* C 26))) (or (<= counter (* C 27)) (<= counter 0)))] [2022-03-15 21:38:30,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-15 21:38:30,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:38:30,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-15 21:38:30,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1403, Invalid=3853, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 21:38:30,723 INFO L87 Difference]: Start difference. First operand 223 states and 476 transitions. Second operand has 73 states, 72 states have (on average 3.0416666666666665) internal successors, (219), 72 states have internal predecessors, (219), 0 states have call successors, (0), 0 states 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 21:38:33,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:38:33,115 INFO L93 Difference]: Finished difference Result 721 states and 1399 transitions. [2022-03-15 21:38:33,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 21:38:33,115 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 3.0416666666666665) internal successors, (219), 72 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-03-15 21:38:33,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:38:33,116 INFO L225 Difference]: With dead ends: 721 [2022-03-15 21:38:33,116 INFO L226 Difference]: Without dead ends: 645 [2022-03-15 21:38:33,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 259 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1403, Invalid=3853, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 21:38:33,116 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 629 mSDsluCounter, 4012 mSDsCounter, 0 mSdLazyCounter, 6654 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 6654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:38:33,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [629 Valid, 0 Invalid, 6801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 6654 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-15 21:38:33,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-03-15 21:38:33,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 469. [2022-03-15 21:38:33,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 2.2905982905982905) internal successors, (1072), 468 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:38:33,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1072 transitions. [2022-03-15 21:38:33,121 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1072 transitions. Word has length 78 [2022-03-15 21:38:33,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:38:33,121 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 1072 transitions. [2022-03-15 21:38:33,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 3.0416666666666665) internal successors, (219), 72 states have internal predecessors, (219), 0 states have call successors, (0), 0 states 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 21:38:33,121 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1072 transitions. [2022-03-15 21:38:33,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-15 21:38:33,122 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:38:33,122 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:38:33,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-03-15 21:38:33,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:33,322 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:38:33,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:38:33,322 INFO L85 PathProgramCache]: Analyzing trace with hash -354325760, now seen corresponding path program 104 times [2022-03-15 21:38:33,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:38:33,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423266893] [2022-03-15 21:38:33,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:38:33,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:38:33,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:35,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 630 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:35,203 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:38:35,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423266893] [2022-03-15 21:38:35,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423266893] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:38:35,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509947715] [2022-03-15 21:38:35,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:38:35,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:35,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:38:35,204 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:38:35,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-15 21:38:35,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:38:35,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:38:35,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-15 21:38:35,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:38:39,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 630 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:39,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:38:43,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 630 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:43,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509947715] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:38:43,346 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:38:43,346 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 217 [2022-03-15 21:38:43,346 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [406580214] [2022-03-15 21:38:43,346 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:38:43,379 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:38:43,515 INFO L252 McrAutomatonBuilder]: Finished intersection with 189 states and 297 transitions. [2022-03-15 21:38:43,515 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:38:47,749 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 36 new interpolants: [115691#(or (<= N2 (+ i2 17)) (<= (+ 19 i2) N2)), 115692#(or (<= (+ i2 20) N2) (<= N2 (+ i2 18))), 115709#(< i1 N1), 115679#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2))), 115680#(or (<= N2 (+ 6 i2)) (<= (+ i2 8) N2)), 115697#(or (<= N2 (+ 23 i2)) (<= (+ i2 25) N2)), 115707#(or (<= (+ 35 i2) N2) (<= N2 (+ i2 33))), 115674#(or (<= N2 i2) (<= (+ 2 i2) N2)), 115676#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2))), 115687#(or (<= (+ i2 15) N2) (<= N2 (+ i2 13))), 115701#(or (<= (+ 29 i2) N2) (<= N2 (+ i2 27))), 115696#(or (<= N2 (+ 22 i2)) (<= (+ i2 24) N2)), 115705#(or (<= (+ i2 33) N2) (<= N2 (+ i2 31))), 115683#(or (<= (+ i2 11) N2) (<= N2 (+ 9 i2))), 115704#(or (<= (+ 32 i2) N2) (<= N2 (+ 30 i2))), 115703#(or (<= (+ i2 31) N2) (<= N2 (+ 29 i2))), 115689#(or (<= N2 (+ i2 15)) (<= (+ i2 17) N2)), 115678#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 115682#(or (<= (+ i2 10) N2) (<= N2 (+ i2 8))), 115685#(or (<= N2 (+ i2 11)) (<= (+ i2 13) N2)), 115708#(or (<= N2 (+ i2 34)) (<= (+ i2 36) N2)), 115681#(or (<= (+ 9 i2) N2) (<= N2 (+ 7 i2))), 115677#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 115684#(or (<= N2 (+ i2 10)) (<= (+ i2 12) N2)), 115699#(or (<= (+ i2 27) N2) (<= N2 (+ i2 25))), 115690#(or (<= N2 (+ 16 i2)) (<= (+ i2 18) N2)), 115702#(or (<= N2 (+ i2 28)) (<= (+ 30 i2) N2)), 115695#(or (<= (+ 23 i2) N2) (<= N2 (+ 21 i2))), 115698#(or (<= (+ i2 26) N2) (<= N2 (+ i2 24))), 115706#(or (<= N2 (+ 32 i2)) (<= (+ i2 34) N2)), 115693#(or (<= N2 (+ 19 i2)) (<= (+ 21 i2) N2)), 115686#(or (<= N2 (+ i2 12)) (<= (+ 14 i2) N2)), 115675#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 115700#(or (<= N2 (+ i2 26)) (<= (+ i2 28) N2)), 115688#(or (<= N2 (+ 14 i2)) (<= (+ 16 i2) N2)), 115694#(or (<= (+ 22 i2) N2) (<= N2 (+ i2 20)))] [2022-03-15 21:38:47,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-03-15 21:38:47,750 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:38:47,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-03-15 21:38:47,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8947, Invalid=55315, Unknown=0, NotChecked=0, Total=64262 [2022-03-15 21:38:47,752 INFO L87 Difference]: Start difference. First operand 469 states and 1072 transitions. Second operand has 111 states, 111 states have (on average 2.018018018018018) internal successors, (224), 110 states have internal predecessors, (224), 0 states have call successors, (0), 0 states 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 21:38:54,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:38:54,499 INFO L93 Difference]: Finished difference Result 796 states and 1579 transitions. [2022-03-15 21:38:54,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-03-15 21:38:54,499 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.018018018018018) internal successors, (224), 110 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-03-15 21:38:54,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:38:54,500 INFO L225 Difference]: With dead ends: 796 [2022-03-15 21:38:54,500 INFO L226 Difference]: Without dead ends: 658 [2022-03-15 21:38:54,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 50 SyntacticMatches, 37 SemanticMatches, 359 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44991 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=25616, Invalid=104344, Unknown=0, NotChecked=0, Total=129960 [2022-03-15 21:38:54,506 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 876 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 3472 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 3472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:38:54,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [876 Valid, 0 Invalid, 3672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 3472 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-15 21:38:54,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-03-15 21:38:54,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 264. [2022-03-15 21:38:54,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.1254752851711025) internal successors, (559), 263 states have internal predecessors, (559), 0 states have call successors, (0), 0 states 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 21:38:54,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 559 transitions. [2022-03-15 21:38:54,509 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 559 transitions. Word has length 79 [2022-03-15 21:38:54,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:38:54,509 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 559 transitions. [2022-03-15 21:38:54,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.018018018018018) internal successors, (224), 110 states have internal predecessors, (224), 0 states have call successors, (0), 0 states 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 21:38:54,509 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 559 transitions. [2022-03-15 21:38:54,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-15 21:38:54,510 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:38:54,510 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:38:54,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-03-15 21:38:54,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-03-15 21:38:54,710 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:38:54,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:38:54,711 INFO L85 PathProgramCache]: Analyzing trace with hash 209836460, now seen corresponding path program 105 times [2022-03-15 21:38:54,711 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:38:54,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26189262] [2022-03-15 21:38:54,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:38:54,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:38:54,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:55,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 631 proven. 665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:55,547 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:38:55,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26189262] [2022-03-15 21:38:55,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26189262] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:38:55,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135636387] [2022-03-15 21:38:55,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:38:55,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:55,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:38:55,548 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:38:55,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-15 21:38:55,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2022-03-15 21:38:55,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:38:55,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-15 21:38:55,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:38:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 631 proven. 665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:58,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:02,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:02,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135636387] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:02,492 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:02,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 73, 73] total 181 [2022-03-15 21:39:02,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [529055793] [2022-03-15 21:39:02,492 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:02,501 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:02,595 INFO L252 McrAutomatonBuilder]: Finished intersection with 118 states and 155 transitions. [2022-03-15 21:39:02,595 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:03,423 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [117898#(< i2 N2)] [2022-03-15 21:39:03,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 21:39:03,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:03,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 21:39:03,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7579, Invalid=25727, Unknown=0, NotChecked=0, Total=33306 [2022-03-15 21:39:03,425 INFO L87 Difference]: Start difference. First operand 264 states and 559 transitions. Second operand has 40 states, 40 states have (on average 2.95) internal successors, (118), 39 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 21:39:07,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:07,279 INFO L93 Difference]: Finished difference Result 510 states and 1010 transitions. [2022-03-15 21:39:07,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-03-15 21:39:07,279 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.95) internal successors, (118), 39 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-03-15 21:39:07,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:07,280 INFO L225 Difference]: With dead ends: 510 [2022-03-15 21:39:07,280 INFO L226 Difference]: Without dead ends: 509 [2022-03-15 21:39:07,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 51 SyntacticMatches, 35 SemanticMatches, 286 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29127 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=19267, Invalid=63389, Unknown=0, NotChecked=0, Total=82656 [2022-03-15 21:39:07,285 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 260 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:07,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 0 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:39:07,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-03-15 21:39:07,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 229. [2022-03-15 21:39:07,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.1447368421052633) internal successors, (489), 228 states have internal predecessors, (489), 0 states have call successors, (0), 0 states 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 21:39:07,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 489 transitions. [2022-03-15 21:39:07,290 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 489 transitions. Word has length 79 [2022-03-15 21:39:07,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:07,290 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 489 transitions. [2022-03-15 21:39:07,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.95) internal successors, (118), 39 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 21:39:07,290 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 489 transitions. [2022-03-15 21:39:07,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-15 21:39:07,290 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:07,290 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:07,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-03-15 21:39:07,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-03-15 21:39:07,511 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:07,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:07,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1876531208, now seen corresponding path program 106 times [2022-03-15 21:39:07,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:07,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499875131] [2022-03-15 21:39:07,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:07,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:08,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1331 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:08,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:08,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499875131] [2022-03-15 21:39:08,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499875131] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:08,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617473537] [2022-03-15 21:39:08,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:39:08,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:08,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:08,316 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:39:08,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-15 21:39:08,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:39:08,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:39:08,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 147 conjunts are in the unsatisfiable core [2022-03-15 21:39:08,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1331 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:08,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:08,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1331 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:08,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617473537] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:08,920 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:08,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 37 [2022-03-15 21:39:08,920 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2055357072] [2022-03-15 21:39:08,920 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:08,930 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:09,074 INFO L252 McrAutomatonBuilder]: Finished intersection with 192 states and 302 transitions. [2022-03-15 21:39:09,074 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:13,018 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 36 new interpolants: [119605#(and (or (<= counter 0) (<= counter (* 16 C))) (or (<= (* 16 C) counter) (<= counter (* C 15)))), 119613#(and (or (<= (* C 24) counter) (<= counter (* 23 C))) (or (<= counter (* C 24)) (<= counter 0))), 119595#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C)))), 119593#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter))), 119611#(and (or (<= (* 22 C) counter) (<= counter (* 21 C))) (or (<= counter 0) (<= counter (* 22 C)))), 119592#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 119615#(and (or (<= counter (* C 25)) (<= (* C 26) counter)) (or (<= counter 0) (<= counter (* C 26)))), 119617#(and (or (<= counter 0) (<= counter (* C 28))) (or (<= counter (* C 27)) (<= (* C 28) counter))), 119600#(and (or (<= counter (* C 10)) (<= (* C 11) counter)) (or (<= counter 0) (<= counter (* C 11)))), 119601#(and (or (<= counter (* C 11)) (<= (* C 12) counter)) (or (<= counter (* C 12)) (<= counter 0))), 119610#(and (or (<= counter 0) (<= counter (* 21 C))) (or (<= (* 21 C) counter) (<= counter (* C 20)))), 119620#(and (or (<= counter (* C 31)) (<= counter 0)) (or (<= (* C 31) counter) (<= counter (* 30 C)))), 119590#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 119596#(and (or (<= counter 0) (<= counter (* 7 C))) (or (<= counter (* 6 C)) (<= (* 7 C) counter))), 119607#(and (or (<= counter (* C 17)) (<= (* C 18) counter)) (or (<= counter 0) (<= counter (* C 18)))), 119624#(and (or (<= counter 0) (<= counter (* 35 C))) (or (<= counter (* C 34)) (<= (* 35 C) counter))), 119598#(and (or (<= (* 9 C) counter) (<= counter (* C 8))) (or (<= counter 0) (<= counter (* 9 C)))), 119599#(and (or (<= (* C 10) counter) (<= counter (* 9 C))) (or (<= counter (* C 10)) (<= counter 0))), 119609#(and (or (<= counter 0) (<= counter (* C 20))) (or (<= (* C 20) counter) (<= counter (* 19 C)))), 119622#(and (or (<= counter 0) (<= counter (* C 33))) (or (<= counter (* 32 C)) (<= (* C 33) counter))), 119612#(and (or (<= counter 0) (<= counter (* 23 C))) (or (<= (* 23 C) counter) (<= counter (* 22 C)))), 119619#(and (or (<= counter 0) (<= counter (* 30 C))) (or (<= counter (* 29 C)) (<= (* 30 C) counter))), 119594#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter))), 119604#(and (or (<= (* C 15) counter) (<= counter (* 14 C))) (or (<= counter 0) (<= counter (* C 15)))), 119618#(and (or (<= counter (* C 28)) (<= (* 29 C) counter)) (or (<= counter 0) (<= counter (* 29 C)))), 119608#(and (or (<= counter (* 19 C)) (<= counter 0)) (or (<= (* 19 C) counter) (<= counter (* C 18)))), 119616#(and (or (<= (* C 27) counter) (<= counter (* C 26))) (or (<= counter (* C 27)) (<= counter 0))), 119621#(and (or (<= counter (* C 31)) (<= (* 32 C) counter)) (or (<= counter (* 32 C)) (<= counter 0))), 119597#(and (or (<= counter 0) (<= counter (* C 8))) (or (<= (* C 8) counter) (<= counter (* 7 C)))), 119606#(and (or (<= counter 0) (<= counter (* C 17))) (or (<= (* C 17) counter) (<= counter (* 16 C)))), 119623#(and (or (<= (* C 34) counter) (<= counter (* C 33))) (or (<= counter (* C 34)) (<= counter 0))), 119603#(and (or (<= (* 14 C) counter) (<= counter (* C 13))) (or (<= counter 0) (<= counter (* 14 C)))), 119625#(and (or (<= (* C 36) counter) (<= counter (* 35 C))) (or (<= counter 0) (<= counter (* C 36)))), 119614#(and (or (<= counter (* C 24)) (<= (* C 25) counter)) (or (<= counter 0) (<= counter (* C 25)))), 119591#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 119602#(and (or (<= counter 0) (<= counter (* C 13))) (or (<= counter (* C 12)) (<= (* C 13) counter)))] [2022-03-15 21:39:13,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-15 21:39:13,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:13,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-15 21:39:13,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1479, Invalid=4071, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 21:39:13,019 INFO L87 Difference]: Start difference. First operand 229 states and 489 transitions. Second operand has 75 states, 74 states have (on average 3.0405405405405403) internal successors, (225), 74 states have internal predecessors, (225), 0 states have call successors, (0), 0 states 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 21:39:15,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:15,689 INFO L93 Difference]: Finished difference Result 741 states and 1438 transitions. [2022-03-15 21:39:15,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 21:39:15,689 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 3.0405405405405403) internal successors, (225), 74 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-03-15 21:39:15,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:15,690 INFO L225 Difference]: With dead ends: 741 [2022-03-15 21:39:15,690 INFO L226 Difference]: Without dead ends: 663 [2022-03-15 21:39:15,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 266 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1479, Invalid=4071, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 21:39:15,691 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 526 mSDsluCounter, 4750 mSDsCounter, 0 mSdLazyCounter, 7847 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 7847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:15,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 0 Invalid, 7985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 7847 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-15 21:39:15,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-03-15 21:39:15,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 482. [2022-03-15 21:39:15,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.291060291060291) internal successors, (1102), 481 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:39:15,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1102 transitions. [2022-03-15 21:39:15,697 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1102 transitions. Word has length 80 [2022-03-15 21:39:15,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:15,697 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1102 transitions. [2022-03-15 21:39:15,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 3.0405405405405403) internal successors, (225), 74 states have internal predecessors, (225), 0 states have call successors, (0), 0 states 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 21:39:15,698 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1102 transitions. [2022-03-15 21:39:15,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-15 21:39:15,698 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:15,698 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:15,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-03-15 21:39:15,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:15,911 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:15,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:15,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2065473986, now seen corresponding path program 107 times [2022-03-15 21:39:15,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:15,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528106757] [2022-03-15 21:39:15,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:15,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:15,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:17,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 666 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:17,878 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:17,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528106757] [2022-03-15 21:39:17,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528106757] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:17,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582784869] [2022-03-15 21:39:17,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:39:17,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:17,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:17,879 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:39:17,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-15 21:39:17,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-03-15 21:39:17,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:39:17,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-15 21:39:17,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:21,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 666 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:21,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 666 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:26,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582784869] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:26,473 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:26,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75, 75] total 223 [2022-03-15 21:39:26,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [259274750] [2022-03-15 21:39:26,473 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:26,514 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:26,706 INFO L252 McrAutomatonBuilder]: Finished intersection with 194 states and 305 transitions. [2022-03-15 21:39:26,706 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:31,209 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 37 new interpolants: [122052#(or (<= N2 (+ i2 17)) (<= (+ 19 i2) N2)), 122061#(or (<= N2 (+ i2 26)) (<= (+ i2 28) N2)), 122066#(or (<= (+ i2 33) N2) (<= N2 (+ i2 31))), 122069#(or (<= N2 (+ i2 34)) (<= (+ i2 36) N2)), 122049#(or (<= N2 (+ 14 i2)) (<= (+ 16 i2) N2)), 122042#(or (<= (+ 9 i2) N2) (<= N2 (+ 7 i2))), 122065#(or (<= (+ 32 i2) N2) (<= N2 (+ 30 i2))), 122035#(or (<= N2 i2) (<= (+ 2 i2) N2)), 122056#(or (<= (+ 23 i2) N2) (<= N2 (+ 21 i2))), 122071#(< i1 N1), 122041#(or (<= N2 (+ 6 i2)) (<= (+ i2 8) N2)), 122040#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2))), 122043#(or (<= (+ i2 10) N2) (<= N2 (+ i2 8))), 122059#(or (<= (+ i2 26) N2) (<= N2 (+ i2 24))), 122054#(or (<= N2 (+ 19 i2)) (<= (+ 21 i2) N2)), 122038#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 122047#(or (<= N2 (+ i2 12)) (<= (+ 14 i2) N2)), 122051#(or (<= N2 (+ 16 i2)) (<= (+ i2 18) N2)), 122058#(or (<= N2 (+ 23 i2)) (<= (+ i2 25) N2)), 122044#(or (<= (+ i2 11) N2) (<= N2 (+ 9 i2))), 122068#(or (<= (+ 35 i2) N2) (<= N2 (+ i2 33))), 122070#(or (<= N2 (+ 35 i2)) (<= (+ i2 37) N2)), 122057#(or (<= N2 (+ 22 i2)) (<= (+ i2 24) N2)), 122067#(or (<= N2 (+ 32 i2)) (<= (+ i2 34) N2)), 122063#(or (<= N2 (+ i2 28)) (<= (+ 30 i2) N2)), 122046#(or (<= N2 (+ i2 11)) (<= (+ i2 13) N2)), 122062#(or (<= (+ 29 i2) N2) (<= N2 (+ i2 27))), 122039#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 122053#(or (<= (+ i2 20) N2) (<= N2 (+ i2 18))), 122064#(or (<= (+ i2 31) N2) (<= N2 (+ 29 i2))), 122037#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2))), 122045#(or (<= N2 (+ i2 10)) (<= (+ i2 12) N2)), 122050#(or (<= N2 (+ i2 15)) (<= (+ i2 17) N2)), 122048#(or (<= (+ i2 15) N2) (<= N2 (+ i2 13))), 122036#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 122060#(or (<= (+ i2 27) N2) (<= N2 (+ i2 25))), 122055#(or (<= (+ 22 i2) N2) (<= N2 (+ i2 20)))] [2022-03-15 21:39:31,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-03-15 21:39:31,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:31,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-03-15 21:39:31,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9436, Invalid=58424, Unknown=0, NotChecked=0, Total=67860 [2022-03-15 21:39:31,212 INFO L87 Difference]: Start difference. First operand 482 states and 1102 transitions. Second operand has 114 states, 114 states have (on average 2.017543859649123) internal successors, (230), 113 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:39:38,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:38,350 INFO L93 Difference]: Finished difference Result 818 states and 1623 transitions. [2022-03-15 21:39:38,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-03-15 21:39:38,350 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.017543859649123) internal successors, (230), 113 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-03-15 21:39:38,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:38,351 INFO L225 Difference]: With dead ends: 818 [2022-03-15 21:39:38,351 INFO L226 Difference]: Without dead ends: 676 [2022-03-15 21:39:38,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 51 SyntacticMatches, 38 SemanticMatches, 369 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47554 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=27049, Invalid=110221, Unknown=0, NotChecked=0, Total=137270 [2022-03-15 21:39:38,358 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1040 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 3522 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1040 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 3522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:38,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1040 Valid, 0 Invalid, 3731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 3522 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-15 21:39:38,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-03-15 21:39:38,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 271. [2022-03-15 21:39:38,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 2.1259259259259258) internal successors, (574), 270 states have internal predecessors, (574), 0 states have call successors, (0), 0 states 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 21:39:38,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 574 transitions. [2022-03-15 21:39:38,362 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 574 transitions. Word has length 81 [2022-03-15 21:39:38,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:38,362 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 574 transitions. [2022-03-15 21:39:38,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.017543859649123) internal successors, (230), 113 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:39:38,362 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 574 transitions. [2022-03-15 21:39:38,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-15 21:39:38,362 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:38,362 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:38,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-03-15 21:39:38,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:38,563 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:38,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:38,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1840831318, now seen corresponding path program 108 times [2022-03-15 21:39:38,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:38,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632814127] [2022-03-15 21:39:38,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:38,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:38,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:39,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 667 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:39,394 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:39,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632814127] [2022-03-15 21:39:39,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632814127] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:39,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308573127] [2022-03-15 21:39:39,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:39:39,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:39,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:39,395 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:39:39,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-15 21:39:39,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-03-15 21:39:39,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:39:39,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-15 21:39:39,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:42,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 667 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:42,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:46,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:46,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308573127] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:46,722 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:46,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 75, 75] total 186 [2022-03-15 21:39:46,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1752382236] [2022-03-15 21:39:46,722 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:46,732 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:46,829 INFO L252 McrAutomatonBuilder]: Finished intersection with 121 states and 159 transitions. [2022-03-15 21:39:46,830 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:47,638 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [124319#(< i2 N2)] [2022-03-15 21:39:47,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 21:39:47,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:47,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 21:39:47,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7993, Invalid=27163, Unknown=0, NotChecked=0, Total=35156 [2022-03-15 21:39:47,640 INFO L87 Difference]: Start difference. First operand 271 states and 574 transitions. Second operand has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 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 21:39:51,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:51,681 INFO L93 Difference]: Finished difference Result 524 states and 1038 transitions. [2022-03-15 21:39:51,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-03-15 21:39:51,681 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 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) Word has length 81 [2022-03-15 21:39:51,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:51,682 INFO L225 Difference]: With dead ends: 524 [2022-03-15 21:39:51,682 INFO L226 Difference]: Without dead ends: 523 [2022-03-15 21:39:51,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 52 SyntacticMatches, 36 SemanticMatches, 294 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30805 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=20339, Invalid=66981, Unknown=0, NotChecked=0, Total=87320 [2022-03-15 21:39:51,690 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 343 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:51,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 0 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:39:51,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-03-15 21:39:51,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 235. [2022-03-15 21:39:51,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.1452991452991452) internal successors, (502), 234 states have internal predecessors, (502), 0 states have call successors, (0), 0 states 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 21:39:51,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 502 transitions. [2022-03-15 21:39:51,693 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 502 transitions. Word has length 81 [2022-03-15 21:39:51,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:51,693 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 502 transitions. [2022-03-15 21:39:51,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 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 21:39:51,693 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 502 transitions. [2022-03-15 21:39:51,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-15 21:39:51,693 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:51,693 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:51,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-03-15 21:39:51,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2022-03-15 21:39:51,894 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:51,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:51,894 INFO L85 PathProgramCache]: Analyzing trace with hash -419087994, now seen corresponding path program 109 times [2022-03-15 21:39:51,895 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:51,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154732791] [2022-03-15 21:39:51,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:51,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:52,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:52,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:52,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154732791] [2022-03-15 21:39:52,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154732791] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:52,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156988196] [2022-03-15 21:39:52,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:39:52,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:52,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:52,740 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:39:52,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-15 21:39:52,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:52,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 151 conjunts are in the unsatisfiable core [2022-03-15 21:39:52,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:53,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:53,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:53,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156988196] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:53,368 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:53,368 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 38 [2022-03-15 21:39:53,368 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1462622958] [2022-03-15 21:39:53,368 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:53,379 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:53,536 INFO L252 McrAutomatonBuilder]: Finished intersection with 197 states and 310 transitions. [2022-03-15 21:39:53,536 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:57,635 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 37 new interpolants: [126074#(and (or (<= counter (* 19 C)) (<= counter 0)) (or (<= (* 19 C) counter) (<= counter (* C 18)))), 126079#(and (or (<= (* C 24) counter) (<= counter (* 23 C))) (or (<= counter (* C 24)) (<= counter 0))), 126081#(and (or (<= counter (* C 25)) (<= (* C 26) counter)) (or (<= counter 0) (<= counter (* C 26)))), 126086#(and (or (<= counter (* C 31)) (<= counter 0)) (or (<= (* C 31) counter) (<= counter (* 30 C)))), 126076#(and (or (<= counter 0) (<= counter (* 21 C))) (or (<= (* 21 C) counter) (<= counter (* C 20)))), 126089#(and (or (<= (* C 34) counter) (<= counter (* C 33))) (or (<= counter (* C 34)) (<= counter 0))), 126065#(and (or (<= (* C 10) counter) (<= counter (* 9 C))) (or (<= counter (* C 10)) (<= counter 0))), 126075#(and (or (<= counter 0) (<= counter (* C 20))) (or (<= (* C 20) counter) (<= counter (* 19 C)))), 126056#(and (or (<= counter 0) (<= counter C)) (or (<= counter 0) (<= C counter))), 126066#(and (or (<= counter (* C 10)) (<= (* C 11) counter)) (or (<= counter 0) (<= counter (* C 11)))), 126092#(and (or (<= counter 0) (<= counter (* C 37))) (or (<= (* C 37) counter) (<= counter (* C 36)))), 126078#(and (or (<= counter 0) (<= counter (* 23 C))) (or (<= (* 23 C) counter) (<= counter (* 22 C)))), 126064#(and (or (<= (* 9 C) counter) (<= counter (* C 8))) (or (<= counter 0) (<= counter (* 9 C)))), 126072#(and (or (<= counter 0) (<= counter (* C 17))) (or (<= (* C 17) counter) (<= counter (* 16 C)))), 126058#(and (or (<= counter (* 2 C)) (<= (* 3 C) counter)) (or (<= counter 0) (<= counter (* 3 C)))), 126061#(and (or (<= counter (* 6 C)) (<= counter 0)) (or (<= (* 6 C) counter) (<= counter (* 5 C)))), 126069#(and (or (<= (* 14 C) counter) (<= counter (* C 13))) (or (<= counter 0) (<= counter (* 14 C)))), 126083#(and (or (<= counter 0) (<= counter (* C 28))) (or (<= counter (* C 27)) (<= (* C 28) counter))), 126090#(and (or (<= counter 0) (<= counter (* 35 C))) (or (<= counter (* C 34)) (<= (* 35 C) counter))), 126062#(and (or (<= counter 0) (<= counter (* 7 C))) (or (<= counter (* 6 C)) (<= (* 7 C) counter))), 126082#(and (or (<= (* C 27) counter) (<= counter (* C 26))) (or (<= counter (* C 27)) (<= counter 0))), 126087#(and (or (<= counter (* C 31)) (<= (* 32 C) counter)) (or (<= counter (* 32 C)) (<= counter 0))), 126059#(and (or (<= counter 0) (<= counter (* C 4))) (or (<= counter (* 3 C)) (<= (* C 4) counter))), 126057#(and (or (<= counter (* 2 C)) (<= counter 0)) (or (<= counter C) (<= (* 2 C) counter))), 126088#(and (or (<= counter 0) (<= counter (* C 33))) (or (<= counter (* 32 C)) (<= (* C 33) counter))), 126077#(and (or (<= (* 22 C) counter) (<= counter (* 21 C))) (or (<= counter 0) (<= counter (* 22 C)))), 126063#(and (or (<= counter 0) (<= counter (* C 8))) (or (<= (* C 8) counter) (<= counter (* 7 C)))), 126085#(and (or (<= counter 0) (<= counter (* 30 C))) (or (<= counter (* 29 C)) (<= (* 30 C) counter))), 126071#(and (or (<= counter 0) (<= counter (* 16 C))) (or (<= (* 16 C) counter) (<= counter (* C 15)))), 126060#(and (or (<= counter 0) (<= counter (* 5 C))) (or (<= counter (* C 4)) (<= (* 5 C) counter))), 126067#(and (or (<= counter (* C 11)) (<= (* C 12) counter)) (or (<= counter (* C 12)) (<= counter 0))), 126091#(and (or (<= (* C 36) counter) (<= counter (* 35 C))) (or (<= counter 0) (<= counter (* C 36)))), 126084#(and (or (<= counter (* C 28)) (<= (* 29 C) counter)) (or (<= counter 0) (<= counter (* 29 C)))), 126068#(and (or (<= counter 0) (<= counter (* C 13))) (or (<= counter (* C 12)) (<= (* C 13) counter))), 126080#(and (or (<= counter (* C 24)) (<= (* C 25) counter)) (or (<= counter 0) (<= counter (* C 25)))), 126070#(and (or (<= (* C 15) counter) (<= counter (* 14 C))) (or (<= counter 0) (<= counter (* C 15)))), 126073#(and (or (<= counter (* C 17)) (<= (* C 18) counter)) (or (<= counter 0) (<= counter (* C 18))))] [2022-03-15 21:39:57,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-15 21:39:57,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:57,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-15 21:39:57,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1557, Invalid=4295, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 21:39:57,636 INFO L87 Difference]: Start difference. First operand 235 states and 502 transitions. Second operand has 77 states, 76 states have (on average 3.039473684210526) internal successors, (231), 76 states have internal predecessors, (231), 0 states have call successors, (0), 0 states 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 21:40:00,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:40:00,163 INFO L93 Difference]: Finished difference Result 761 states and 1477 transitions. [2022-03-15 21:40:00,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 21:40:00,163 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 3.039473684210526) internal successors, (231), 76 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-03-15 21:40:00,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:40:00,165 INFO L225 Difference]: With dead ends: 761 [2022-03-15 21:40:00,165 INFO L226 Difference]: Without dead ends: 681 [2022-03-15 21:40:00,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 273 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1557, Invalid=4295, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 21:40:00,165 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 584 mSDsluCounter, 4452 mSDsCounter, 0 mSdLazyCounter, 7367 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 7367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:40:00,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [584 Valid, 0 Invalid, 7507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 7367 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-15 21:40:00,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-03-15 21:40:00,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 495. [2022-03-15 21:40:00,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 2.291497975708502) internal successors, (1132), 494 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states 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 21:40:00,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1132 transitions. [2022-03-15 21:40:00,170 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1132 transitions. Word has length 82 [2022-03-15 21:40:00,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:40:00,170 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 1132 transitions. [2022-03-15 21:40:00,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 3.039473684210526) internal successors, (231), 76 states have internal predecessors, (231), 0 states have call successors, (0), 0 states 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 21:40:00,170 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1132 transitions. [2022-03-15 21:40:00,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-15 21:40:00,171 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:40:00,171 INFO L514 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:40:00,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-03-15 21:40:00,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-03-15 21:40:00,372 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:40:00,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:40:00,372 INFO L85 PathProgramCache]: Analyzing trace with hash 766295232, now seen corresponding path program 110 times [2022-03-15 21:40:00,373 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:40:00,373 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420214339] [2022-03-15 21:40:00,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:40:00,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:40:00,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:40:02,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 703 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:02,432 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:40:02,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420214339] [2022-03-15 21:40:02,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420214339] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:40:02,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111679479] [2022-03-15 21:40:02,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:40:02,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:40:02,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:40:02,433 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:40:02,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-15 21:40:02,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:40:02,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:40:02,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-15 21:40:02,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:40:06,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 703 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:06,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:40:11,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 703 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:11,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111679479] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:40:11,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:40:11,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 77, 77] total 229 [2022-03-15 21:40:11,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2050771958] [2022-03-15 21:40:11,517 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:40:11,527 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:40:11,752 INFO L252 McrAutomatonBuilder]: Finished intersection with 199 states and 313 transitions. [2022-03-15 21:40:11,752 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:40:16,403 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 38 new interpolants: [128584#(or (<= (+ i2 20) N2) (<= N2 (+ i2 18))), 128569#(or (<= N2 (+ 3 i2)) (<= (+ 5 i2) N2)), 128595#(or (<= (+ i2 31) N2) (<= N2 (+ 29 i2))), 128581#(or (<= N2 (+ i2 15)) (<= (+ i2 17) N2)), 128571#(or (<= (+ 7 i2) N2) (<= N2 (+ 5 i2))), 128602#(or (<= (+ i2 38) N2) (<= N2 (+ i2 36))), 128590#(or (<= (+ i2 26) N2) (<= N2 (+ i2 24))), 128572#(or (<= N2 (+ 6 i2)) (<= (+ i2 8) N2)), 128592#(or (<= N2 (+ i2 26)) (<= (+ i2 28) N2)), 128597#(or (<= (+ i2 33) N2) (<= N2 (+ i2 31))), 128600#(or (<= N2 (+ i2 34)) (<= (+ i2 36) N2)), 128601#(or (<= N2 (+ 35 i2)) (<= (+ i2 37) N2)), 128588#(or (<= N2 (+ 22 i2)) (<= (+ i2 24) N2)), 128591#(or (<= (+ i2 27) N2) (<= N2 (+ i2 25))), 128580#(or (<= N2 (+ 14 i2)) (<= (+ 16 i2) N2)), 128567#(or (<= N2 (+ i2 1)) (<= (+ 3 i2) N2)), 128599#(or (<= (+ 35 i2) N2) (<= N2 (+ i2 33))), 128570#(or (<= (+ 6 i2) N2) (<= N2 (+ i2 4))), 128574#(or (<= (+ i2 10) N2) (<= N2 (+ i2 8))), 128566#(or (<= N2 i2) (<= (+ 2 i2) N2)), 128577#(or (<= N2 (+ i2 11)) (<= (+ i2 13) N2)), 128587#(or (<= (+ 23 i2) N2) (<= N2 (+ 21 i2))), 128589#(or (<= N2 (+ 23 i2)) (<= (+ i2 25) N2)), 128593#(or (<= (+ 29 i2) N2) (<= N2 (+ i2 27))), 128603#(< i1 N1), 128576#(or (<= N2 (+ i2 10)) (<= (+ i2 12) N2)), 128585#(or (<= N2 (+ 19 i2)) (<= (+ 21 i2) N2)), 128594#(or (<= N2 (+ i2 28)) (<= (+ 30 i2) N2)), 128583#(or (<= N2 (+ i2 17)) (<= (+ 19 i2) N2)), 128579#(or (<= (+ i2 15) N2) (<= N2 (+ i2 13))), 128578#(or (<= N2 (+ i2 12)) (<= (+ 14 i2) N2)), 128596#(or (<= (+ 32 i2) N2) (<= N2 (+ 30 i2))), 128575#(or (<= (+ i2 11) N2) (<= N2 (+ 9 i2))), 128568#(or (<= (+ i2 4) N2) (<= N2 (+ 2 i2))), 128573#(or (<= (+ 9 i2) N2) (<= N2 (+ 7 i2))), 128582#(or (<= N2 (+ 16 i2)) (<= (+ i2 18) N2)), 128598#(or (<= N2 (+ 32 i2)) (<= (+ i2 34) N2)), 128586#(or (<= (+ 22 i2) N2) (<= N2 (+ i2 20)))] [2022-03-15 21:40:16,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-03-15 21:40:16,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:40:16,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-03-15 21:40:16,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9938, Invalid=61618, Unknown=0, NotChecked=0, Total=71556 [2022-03-15 21:40:16,406 INFO L87 Difference]: Start difference. First operand 495 states and 1132 transitions. Second operand has 117 states, 117 states have (on average 2.017094017094017) internal successors, (236), 116 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-03-15 21:40:23,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-03-15 21:40:23,756 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 21:40:23,756 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 21:40:23,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 52 SyntacticMatches, 39 SemanticMatches, 377 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50111 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=27923, Invalid=115339, Unknown=0, NotChecked=0, Total=143262 [2022-03-15 21:40:23,759 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 943 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 3565 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 943 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 3565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:40:23,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [943 Valid, 0 Invalid, 3790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 3565 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-15 21:40:23,760 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-15 21:40:23,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-03-15 21:40:23,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-03-15 21:40:23,961 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (495states) and FLOYD_HOARE automaton (currently 114 states, 117 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 379 known predicates. [2022-03-15 21:40:23,962 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-15 21:40:23,962 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-15 21:40:23,964 INFO L732 BasicCegarLoop]: Path program histogram: [110, 2, 1] [2022-03-15 21:40:23,965 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 21:40:23,965 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 21:40:23,966 INFO L202 PluginConnector]: Adding new model figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 09:40:23 BasicIcfg [2022-03-15 21:40:23,966 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 21:40:23,966 INFO L158 Benchmark]: Toolchain (without parser) took 690080.96ms. Allocated memory was 175.1MB in the beginning and 1.0GB in the end (delta: 874.5MB). Free memory was 134.0MB in the beginning and 411.9MB in the end (delta: -277.9MB). Peak memory consumption was 598.5MB. Max. memory is 8.0GB. [2022-03-15 21:40:23,966 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 175.1MB. Free memory is still 135.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 21:40:23,967 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.76ms. Allocated memory is still 175.1MB. Free memory was 133.9MB in the beginning and 132.3MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-03-15 21:40:23,967 INFO L158 Benchmark]: Boogie Preprocessor took 16.36ms. Allocated memory is still 175.1MB. Free memory was 132.3MB in the beginning and 131.4MB in the end (delta: 920.6kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 21:40:23,967 INFO L158 Benchmark]: RCFGBuilder took 213.33ms. Allocated memory is still 175.1MB. Free memory was 131.4MB in the beginning and 122.5MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-03-15 21:40:23,967 INFO L158 Benchmark]: TraceAbstraction took 689819.12ms. Allocated memory was 175.1MB in the beginning and 1.0GB in the end (delta: 874.5MB). Free memory was 122.0MB in the beginning and 411.9MB in the end (delta: -289.9MB). Peak memory consumption was 584.9MB. Max. memory is 8.0GB. [2022-03-15 21:40:23,967 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 0.13ms. Allocated memory is still 175.1MB. Free memory is still 135.1MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 26.76ms. Allocated memory is still 175.1MB. Free memory was 133.9MB in the beginning and 132.3MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 16.36ms. Allocated memory is still 175.1MB. Free memory was 132.3MB in the beginning and 131.4MB in the end (delta: 920.6kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 213.33ms. Allocated memory is still 175.1MB. Free memory was 131.4MB in the beginning and 122.5MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 689819.12ms. Allocated memory was 175.1MB in the beginning and 1.0GB in the end (delta: 874.5MB). Free memory was 122.0MB in the beginning and 411.9MB in the end (delta: -289.9MB). Peak memory consumption was 584.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.3s, 28 PlacesBefore, 18 PlacesAfterwards, 23 TransitionsBefore, 13 TransitionsAfterwards, 48 CoEnabledTransitionPairs, 3 FixpointIterations, 7 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 11 TotalNumberOfCompositions, 43 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 43, positive: 43, positive conditional: 0, positive unconditional: 43, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 23, positive: 23, positive conditional: 0, positive unconditional: 23, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 43, positive: 20, positive conditional: 0, positive unconditional: 20, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 23, unknown conditional: 0, unknown unconditional: 23] , Statistics on independence cache: Total cache size (in pairs): 5, Positive cache size: 5, Positive conditional cache size: 0, Positive unconditional cache size: 5, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (495states) and FLOYD_HOARE automaton (currently 114 states, 117 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 379 known predicates. - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (495states) and FLOYD_HOARE automaton (currently 114 states, 117 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 379 known predicates. - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (495states) and FLOYD_HOARE automaton (currently 114 states, 117 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 379 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 689.7s, OverallIterations: 113, TraceHistogramMax: 38, PathProgramHistogramMax: 110, EmptinessCheckTime: 0.1s, AutomataDifference: 201.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.3s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 33545 SdHoareTripleChecker+Valid, 66.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 33545 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 55.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 86429 mSDsCounter, 8653 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 180498 IncrementalHoareTripleChecker+Invalid, 189151 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8653 mSolverCounterUnsat, 0 mSDtfsCounter, 180498 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 23886 GetRequests, 7965 SyntacticMatches, 1555 SemanticMatches, 14365 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041699 ImplicationChecksByTransitivity, 456.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=495occurred in iteration=112, InterpolantAutomatonStates: 5782, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 112 MinimizatonAttempts, 16546 StatesRemovedByMinimization, 111 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 3.8s SatisfiabilityAnalysisTime, 298.6s InterpolantComputationTime, 10230 NumberOfCodeBlocks, 10230 NumberOfCodeBlocksAsserted, 845 NumberOfCheckSat, 15001 ConstructedInterpolants, 0 QuantifiedInterpolants, 146230 SizeOfPredicates, 186 NumberOfNonLiveVariables, 26048 ConjunctsInSsa, 6031 ConjunctsInUnsatCore, 335 InterpolantComputations, 3 PerfectInterpolantSequences, 53614/164616 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown