/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/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-queue.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 18:15:28,716 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 18:15:28,719 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 18:15:28,761 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 18:15:28,761 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 18:15:28,764 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 18:15:28,766 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 18:15:28,771 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 18:15:28,774 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 18:15:28,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 18:15:28,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 18:15:28,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 18:15:28,781 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 18:15:28,783 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 18:15:28,785 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 18:15:28,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 18:15:28,790 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 18:15:28,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 18:15:28,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 18:15:28,799 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 18:15:28,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 18:15:28,817 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 18:15:28,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 18:15:28,820 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 18:15:28,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-21 18:15:28,831 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 18:15:28,832 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 18:15:28,832 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 18:15:28,839 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2021-08-21 18:15:28,876 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 18:15:28,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 18:15:28,879 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 18:15:28,879 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 18:15:28,880 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 18:15:28,880 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 18:15:28,880 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 18:15:28,880 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 18:15:28,880 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 18:15:28,880 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 18:15:28,881 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 18:15:28,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 18:15:28,881 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 18:15:28,882 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 18:15:28,882 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 18:15:28,882 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 18:15:28,882 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 18:15:28,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 18:15:28,882 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 18:15:28,882 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 18:15:28,883 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 18:15:28,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:15:28,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 18:15:28,883 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 18:15:28,883 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 18:15:28,883 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 18:15:28,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 18:15:28,883 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 18:15:28,884 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 18:15:28,884 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 18:15:28,884 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 18:15:29,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 18:15:29,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 18:15:29,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 18:15:29,185 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 18:15:29,186 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 18:15:29,187 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-queue.wvr.bpl [2021-08-21 18:15:29,187 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-queue.wvr.bpl' [2021-08-21 18:15:29,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 18:15:29,207 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 18:15:29,208 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 18:15:29,208 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 18:15:29,209 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 18:15:29,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:15:29" (1/1) ... [2021-08-21 18:15:29,227 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:15:29" (1/1) ... [2021-08-21 18:15:29,234 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 18:15:29,235 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 18:15:29,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 18:15:29,236 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 18:15:29,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:15:29" (1/1) ... [2021-08-21 18:15:29,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:15:29" (1/1) ... [2021-08-21 18:15:29,244 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:15:29" (1/1) ... [2021-08-21 18:15:29,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:15:29" (1/1) ... [2021-08-21 18:15:29,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:15:29" (1/1) ... [2021-08-21 18:15:29,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:15:29" (1/1) ... [2021-08-21 18:15:29,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:15:29" (1/1) ... [2021-08-21 18:15:29,252 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 18:15:29,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 18:15:29,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 18:15:29,254 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 18:15:29,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:15:29" (1/1) ... [2021-08-21 18:15:29,262 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:15:29,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:29,294 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) [2021-08-21 18:15:29,321 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 [2021-08-21 18:15:29,340 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 18:15:29,340 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 18:15:29,340 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 18:15:29,340 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 18:15:29,340 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 18:15:29,341 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 18:15:29,341 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 18:15:29,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 18:15:29,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 18:15:29,342 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 18:15:29,535 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 18:15:29,535 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-21 18:15:29,536 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-08-21 18:15:29,536 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-08-21 18:15:29,538 INFO L202 PluginConnector]: Adding new model simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:15:29 BoogieIcfgContainer [2021-08-21 18:15:29,538 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 18:15:29,540 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 18:15:29,540 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 18:15:29,542 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 18:15:29,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:15:29" (1/2) ... [2021-08-21 18:15:29,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b8b2118 and model type simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:15:29, skipping insertion in model container [2021-08-21 18:15:29,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:15:29" (2/2) ... [2021-08-21 18:15:29,545 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-queue.wvr.bpl [2021-08-21 18:15:29,549 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 18:15:29,549 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 18:15:29,549 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 18:15:29,549 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 18:15:29,578 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-21 18:15:29,648 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 18:15:29,667 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 18:15:29,668 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 18:15:29,774 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 12 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) [2021-08-21 18:15:29,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-21 18:15:29,779 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:29,779 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:29,780 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:29,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:29,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1902423204, now seen corresponding path program 1 times [2021-08-21 18:15:29,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:29,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556660110] [2021-08-21 18:15:29,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:29,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:29,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:29,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:29,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556660110] [2021-08-21 18:15:29,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556660110] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:15:29,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:15:29,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:15:29,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659809989] [2021-08-21 18:15:29,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:15:29,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:29,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:15:29,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:15:29,995 INFO L87 Difference]: Start difference. First operand has 13 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 12 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:30,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:30,012 INFO L93 Difference]: Finished difference Result 20 states and 25 transitions. [2021-08-21 18:15:30,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:15:30,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:15:30,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:30,021 INFO L225 Difference]: With dead ends: 20 [2021-08-21 18:15:30,022 INFO L226 Difference]: Without dead ends: 12 [2021-08-21 18:15:30,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:15:30,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-08-21 18:15:30,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-08-21 18:15:30,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:30,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2021-08-21 18:15:30,052 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 9 [2021-08-21 18:15:30,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:30,052 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2021-08-21 18:15:30,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:30,053 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2021-08-21 18:15:30,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-21 18:15:30,054 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:30,054 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:30,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 18:15:30,055 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:30,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:30,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1131344589, now seen corresponding path program 1 times [2021-08-21 18:15:30,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:30,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251536151] [2021-08-21 18:15:30,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:30,060 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:30,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:30,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:30,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251536151] [2021-08-21 18:15:30,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251536151] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:15:30,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:15:30,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:15:30,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782881195] [2021-08-21 18:15:30,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:15:30,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:30,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:15:30,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:15:30,126 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:30,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:30,137 INFO L93 Difference]: Finished difference Result 15 states and 21 transitions. [2021-08-21 18:15:30,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:15:30,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:15:30,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:30,138 INFO L225 Difference]: With dead ends: 15 [2021-08-21 18:15:30,138 INFO L226 Difference]: Without dead ends: 14 [2021-08-21 18:15:30,139 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:15:30,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-08-21 18:15:30,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-08-21 18:15:30,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 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) [2021-08-21 18:15:30,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 20 transitions. [2021-08-21 18:15:30,145 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 20 transitions. Word has length 10 [2021-08-21 18:15:30,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:30,145 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 20 transitions. [2021-08-21 18:15:30,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:30,146 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 20 transitions. [2021-08-21 18:15:30,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-21 18:15:30,146 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:30,146 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:30,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 18:15:30,147 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:30,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:30,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1781814060, now seen corresponding path program 1 times [2021-08-21 18:15:30,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:30,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465327640] [2021-08-21 18:15:30,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:30,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:30,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:30,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:30,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465327640] [2021-08-21 18:15:30,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465327640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:30,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730691764] [2021-08-21 18:15:30,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:30,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:30,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:30,220 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) [2021-08-21 18:15:30,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 18:15:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:30,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:15:30,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:30,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:15:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:30,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730691764] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:30,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:30,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:15:30,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262561190] [2021-08-21 18:15:30,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:15:30,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:30,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:15:30,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:15:30,388 INFO L87 Difference]: Start difference. First operand 14 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:30,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:30,449 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2021-08-21 18:15:30,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:15:30,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:15:30,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:30,452 INFO L225 Difference]: With dead ends: 19 [2021-08-21 18:15:30,452 INFO L226 Difference]: Without dead ends: 16 [2021-08-21 18:15:30,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:15:30,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-08-21 18:15:30,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-08-21 18:15:30,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:30,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 24 transitions. [2021-08-21 18:15:30,455 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 24 transitions. Word has length 11 [2021-08-21 18:15:30,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:30,456 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 24 transitions. [2021-08-21 18:15:30,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:30,456 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 24 transitions. [2021-08-21 18:15:30,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 18:15:30,456 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:30,457 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:30,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-21 18:15:30,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:30,658 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:30,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:30,658 INFO L82 PathProgramCache]: Analyzing trace with hash 621417219, now seen corresponding path program 2 times [2021-08-21 18:15:30,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:30,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711158971] [2021-08-21 18:15:30,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:30,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:30,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:30,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:30,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:30,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711158971] [2021-08-21 18:15:30,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711158971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:30,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979639157] [2021-08-21 18:15:30,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:15:30,726 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:30,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:30,735 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) [2021-08-21 18:15:30,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 18:15:30,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:15:30,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:30,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 18:15:30,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:30,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:30,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979639157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:30,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:30,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2021-08-21 18:15:30,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439026279] [2021-08-21 18:15:30,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:15:30,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:30,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:15:30,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:15:30,822 INFO L87 Difference]: Start difference. First operand 16 states and 24 transitions. Second operand has 5 states, 5 states have (on average 3.0) 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) [2021-08-21 18:15:30,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:30,838 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2021-08-21 18:15:30,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:15:30,838 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) 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 12 [2021-08-21 18:15:30,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:30,841 INFO L225 Difference]: With dead ends: 37 [2021-08-21 18:15:30,841 INFO L226 Difference]: Without dead ends: 35 [2021-08-21 18:15:30,841 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:15:30,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-21 18:15:30,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2021-08-21 18:15:30,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:30,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 41 transitions. [2021-08-21 18:15:30,857 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 41 transitions. Word has length 12 [2021-08-21 18:15:30,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:30,858 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 41 transitions. [2021-08-21 18:15:30,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) 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) [2021-08-21 18:15:30,858 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 41 transitions. [2021-08-21 18:15:30,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 18:15:30,860 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:30,860 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:30,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 18:15:31,067 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,SelfDestructingSolverStorable3 [2021-08-21 18:15:31,068 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:31,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:31,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1709486492, now seen corresponding path program 3 times [2021-08-21 18:15:31,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:31,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099949518] [2021-08-21 18:15:31,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:31,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:31,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:31,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:31,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099949518] [2021-08-21 18:15:31,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099949518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:31,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563273197] [2021-08-21 18:15:31,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:15:31,156 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:31,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:31,161 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) [2021-08-21 18:15:31,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 18:15:31,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:15:31,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:31,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:15:31,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:31,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:15:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:31,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563273197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:31,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:31,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:15:31,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328817619] [2021-08-21 18:15:31,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:15:31,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:31,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:15:31,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:15:31,315 INFO L87 Difference]: Start difference. First operand 25 states and 41 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:31,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:31,396 INFO L93 Difference]: Finished difference Result 48 states and 70 transitions. [2021-08-21 18:15:31,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:15:31,397 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:15:31,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:31,400 INFO L225 Difference]: With dead ends: 48 [2021-08-21 18:15:31,400 INFO L226 Difference]: Without dead ends: 30 [2021-08-21 18:15:31,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:15:31,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-21 18:15:31,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2021-08-21 18:15:31,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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) [2021-08-21 18:15:31,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 32 transitions. [2021-08-21 18:15:31,407 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 32 transitions. Word has length 13 [2021-08-21 18:15:31,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:31,407 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 32 transitions. [2021-08-21 18:15:31,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:31,408 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 32 transitions. [2021-08-21 18:15:31,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 18:15:31,411 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:31,412 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:31,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 18:15:31,624 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 [2021-08-21 18:15:31,624 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:31,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:31,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1431395469, now seen corresponding path program 4 times [2021-08-21 18:15:31,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:31,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517863895] [2021-08-21 18:15:31,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:31,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:31,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:31,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517863895] [2021-08-21 18:15:31,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517863895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:31,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608967309] [2021-08-21 18:15:31,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:15:31,686 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:31,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:31,701 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) [2021-08-21 18:15:31,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 18:15:31,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:15:31,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:31,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:15:31,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:31,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:31,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608967309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:31,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:31,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 18:15:31,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726566796] [2021-08-21 18:15:31,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:15:31,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:31,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:15:31,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:15:31,828 INFO L87 Difference]: Start difference. First operand 20 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:31,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:31,841 INFO L93 Difference]: Finished difference Result 54 states and 81 transitions. [2021-08-21 18:15:31,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:15:31,842 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:15:31,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:31,842 INFO L225 Difference]: With dead ends: 54 [2021-08-21 18:15:31,842 INFO L226 Difference]: Without dead ends: 51 [2021-08-21 18:15:31,843 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:15:31,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-21 18:15:31,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2021-08-21 18:15:31,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 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) [2021-08-21 18:15:31,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 64 transitions. [2021-08-21 18:15:31,853 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 64 transitions. Word has length 14 [2021-08-21 18:15:31,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:31,853 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 64 transitions. [2021-08-21 18:15:31,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:31,853 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 64 transitions. [2021-08-21 18:15:31,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 18:15:31,854 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:31,854 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:31,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-08-21 18:15:32,068 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 [2021-08-21 18:15:32,069 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:32,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:32,069 INFO L82 PathProgramCache]: Analyzing trace with hash 543066772, now seen corresponding path program 5 times [2021-08-21 18:15:32,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:32,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146944630] [2021-08-21 18:15:32,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:32,070 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:32,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:32,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146944630] [2021-08-21 18:15:32,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146944630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:32,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904455344] [2021-08-21 18:15:32,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:15:32,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:32,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:32,193 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) [2021-08-21 18:15:32,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 18:15:32,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:15:32,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:32,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 18:15:32,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:32,493 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:15:32,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-08-21 18:15:32,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:32,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904455344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:32,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:32,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 18:15:32,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711362163] [2021-08-21 18:15:32,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:15:32,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:32,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:15:32,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:15:32,526 INFO L87 Difference]: Start difference. First operand 36 states and 64 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-08-21 18:15:32,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:32,929 INFO L93 Difference]: Finished difference Result 165 states and 256 transitions. [2021-08-21 18:15:32,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:15:32,930 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) Word has length 15 [2021-08-21 18:15:32,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:32,931 INFO L225 Difference]: With dead ends: 165 [2021-08-21 18:15:32,931 INFO L226 Difference]: Without dead ends: 93 [2021-08-21 18:15:32,931 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 421.3ms TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:15:32,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-21 18:15:32,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 43. [2021-08-21 18:15:32,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 42 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) [2021-08-21 18:15:32,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 80 transitions. [2021-08-21 18:15:32,936 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 80 transitions. Word has length 15 [2021-08-21 18:15:32,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:32,936 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 80 transitions. [2021-08-21 18:15:32,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-08-21 18:15:32,936 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 80 transitions. [2021-08-21 18:15:32,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 18:15:32,937 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:32,937 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:32,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 18:15:33,152 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 [2021-08-21 18:15:33,153 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:33,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:33,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1239052252, now seen corresponding path program 6 times [2021-08-21 18:15:33,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:33,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090430020] [2021-08-21 18:15:33,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:33,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:33,273 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:33,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:33,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090430020] [2021-08-21 18:15:33,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090430020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:33,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909376204] [2021-08-21 18:15:33,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:15:33,274 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:33,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:33,275 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) [2021-08-21 18:15:33,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 18:15:33,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:15:33,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:33,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 18:15:33,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:33,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:15:33,447 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:33,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909376204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:33,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:33,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-21 18:15:33,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47535898] [2021-08-21 18:15:33,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:15:33,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:33,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:15:33,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:15:33,449 INFO L87 Difference]: Start difference. First operand 43 states and 80 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:33,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:33,612 INFO L93 Difference]: Finished difference Result 89 states and 145 transitions. [2021-08-21 18:15:33,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:15:33,613 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:15:33,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:33,614 INFO L225 Difference]: With dead ends: 89 [2021-08-21 18:15:33,614 INFO L226 Difference]: Without dead ends: 59 [2021-08-21 18:15:33,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 180.8ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:15:33,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-21 18:15:33,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 28. [2021-08-21 18:15:33,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:33,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 48 transitions. [2021-08-21 18:15:33,617 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 48 transitions. Word has length 17 [2021-08-21 18:15:33,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:33,618 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 48 transitions. [2021-08-21 18:15:33,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:33,618 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 48 transitions. [2021-08-21 18:15:33,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 18:15:33,618 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:33,618 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:33,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 18:15:33,832 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 [2021-08-21 18:15:33,832 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:33,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:33,833 INFO L82 PathProgramCache]: Analyzing trace with hash 267164083, now seen corresponding path program 7 times [2021-08-21 18:15:33,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:33,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512925048] [2021-08-21 18:15:33,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:33,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:33,906 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:33,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:33,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512925048] [2021-08-21 18:15:33,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512925048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:33,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402028213] [2021-08-21 18:15:33,907 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:15:33,907 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:33,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:33,908 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) [2021-08-21 18:15:33,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 18:15:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:33,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 18:15:33,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:34,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402028213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:34,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:34,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 18:15:34,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060947576] [2021-08-21 18:15:34,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:15:34,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:34,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:15:34,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:15:34,051 INFO L87 Difference]: Start difference. First operand 28 states and 48 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 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) [2021-08-21 18:15:34,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:34,066 INFO L93 Difference]: Finished difference Result 94 states and 151 transitions. [2021-08-21 18:15:34,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:15:34,067 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 18:15:34,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:34,068 INFO L225 Difference]: With dead ends: 94 [2021-08-21 18:15:34,068 INFO L226 Difference]: Without dead ends: 89 [2021-08-21 18:15:34,068 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:15:34,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-08-21 18:15:34,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 64. [2021-08-21 18:15:34,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 63 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) [2021-08-21 18:15:34,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 122 transitions. [2021-08-21 18:15:34,073 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 122 transitions. Word has length 18 [2021-08-21 18:15:34,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:34,073 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 122 transitions. [2021-08-21 18:15:34,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 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) [2021-08-21 18:15:34,073 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 122 transitions. [2021-08-21 18:15:34,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 18:15:34,074 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:34,074 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:34,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 18:15:34,289 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 [2021-08-21 18:15:34,289 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:34,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:34,289 INFO L82 PathProgramCache]: Analyzing trace with hash -819853228, now seen corresponding path program 8 times [2021-08-21 18:15:34,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:34,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423158427] [2021-08-21 18:15:34,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:34,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:34,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:34,456 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:34,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:34,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423158427] [2021-08-21 18:15:34,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423158427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:34,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692625428] [2021-08-21 18:15:34,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:15:34,457 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:34,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:34,458 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) [2021-08-21 18:15:34,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 18:15:34,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:15:34,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:34,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:15:34,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:34,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:15:34,664 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:34,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692625428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:34,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:34,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-08-21 18:15:34,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236574091] [2021-08-21 18:15:34,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:15:34,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:34,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:15:34,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:15:34,666 INFO L87 Difference]: Start difference. First operand 64 states and 122 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 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) [2021-08-21 18:15:34,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:34,893 INFO L93 Difference]: Finished difference Result 129 states and 214 transitions. [2021-08-21 18:15:34,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 18:15:34,900 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 18:15:34,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:34,901 INFO L225 Difference]: With dead ends: 129 [2021-08-21 18:15:34,901 INFO L226 Difference]: Without dead ends: 81 [2021-08-21 18:15:34,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 262.7ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:15:34,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-21 18:15:34,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 32. [2021-08-21 18:15:34,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) [2021-08-21 18:15:34,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 56 transitions. [2021-08-21 18:15:34,904 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 56 transitions. Word has length 19 [2021-08-21 18:15:34,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:34,904 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 56 transitions. [2021-08-21 18:15:34,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 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) [2021-08-21 18:15:34,905 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 56 transitions. [2021-08-21 18:15:34,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 18:15:34,905 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:34,905 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:34,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 18:15:35,107 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 [2021-08-21 18:15:35,107 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:35,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:35,108 INFO L82 PathProgramCache]: Analyzing trace with hash 377431939, now seen corresponding path program 9 times [2021-08-21 18:15:35,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:35,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789521803] [2021-08-21 18:15:35,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:35,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:35,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:35,192 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:35,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:35,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789521803] [2021-08-21 18:15:35,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789521803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:35,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965164999] [2021-08-21 18:15:35,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:15:35,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:35,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:35,199 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) [2021-08-21 18:15:35,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 18:15:35,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:15:35,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:35,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 18:15:35,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:35,370 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:35,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965164999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:35,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:35,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 18:15:35,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827747603] [2021-08-21 18:15:35,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:15:35,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:35,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:15:35,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:15:35,372 INFO L87 Difference]: Start difference. First operand 32 states and 56 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:35,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:35,391 INFO L93 Difference]: Finished difference Result 117 states and 192 transitions. [2021-08-21 18:15:35,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:15:35,391 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 18:15:35,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:35,392 INFO L225 Difference]: With dead ends: 117 [2021-08-21 18:15:35,392 INFO L226 Difference]: Without dead ends: 111 [2021-08-21 18:15:35,392 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:15:35,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-08-21 18:15:35,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 81. [2021-08-21 18:15:35,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.9625) internal successors, (157), 80 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:35,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 157 transitions. [2021-08-21 18:15:35,397 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 157 transitions. Word has length 20 [2021-08-21 18:15:35,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:35,397 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 157 transitions. [2021-08-21 18:15:35,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:35,397 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 157 transitions. [2021-08-21 18:15:35,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 18:15:35,398 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:35,398 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:35,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 18:15:35,621 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 [2021-08-21 18:15:35,621 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:35,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:35,622 INFO L82 PathProgramCache]: Analyzing trace with hash -569151004, now seen corresponding path program 10 times [2021-08-21 18:15:35,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:35,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210289781] [2021-08-21 18:15:35,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:35,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:35,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:35,820 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:35,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:35,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210289781] [2021-08-21 18:15:35,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210289781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:35,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089143025] [2021-08-21 18:15:35,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:15:35,820 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:35,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:35,821 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) [2021-08-21 18:15:35,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 18:15:35,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:15:35,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:35,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:15:35,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:36,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:15:36,069 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:36,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089143025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:36,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:36,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-21 18:15:36,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788536505] [2021-08-21 18:15:36,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:15:36,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:36,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:15:36,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:15:36,070 INFO L87 Difference]: Start difference. First operand 81 states and 157 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 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) [2021-08-21 18:15:36,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:36,405 INFO L93 Difference]: Finished difference Result 164 states and 278 transitions. [2021-08-21 18:15:36,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:15:36,406 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 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 21 [2021-08-21 18:15:36,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:36,407 INFO L225 Difference]: With dead ends: 164 [2021-08-21 18:15:36,407 INFO L226 Difference]: Without dead ends: 104 [2021-08-21 18:15:36,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 337.7ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:15:36,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-21 18:15:36,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 36. [2021-08-21 18:15:36,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 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) [2021-08-21 18:15:36,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 64 transitions. [2021-08-21 18:15:36,410 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 64 transitions. Word has length 21 [2021-08-21 18:15:36,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:36,410 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 64 transitions. [2021-08-21 18:15:36,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 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) [2021-08-21 18:15:36,410 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 64 transitions. [2021-08-21 18:15:36,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 18:15:36,411 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:36,411 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:36,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 18:15:36,624 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 [2021-08-21 18:15:36,625 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:36,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:36,625 INFO L82 PathProgramCache]: Analyzing trace with hash -440733709, now seen corresponding path program 11 times [2021-08-21 18:15:36,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:36,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750345798] [2021-08-21 18:15:36,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:36,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:36,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:36,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750345798] [2021-08-21 18:15:36,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750345798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:36,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160229913] [2021-08-21 18:15:36,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:15:36,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:36,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:36,733 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) [2021-08-21 18:15:36,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 18:15:36,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:15:36,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:36,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 18:15:36,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:36,919 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:36,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160229913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:36,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:36,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 18:15:36,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859027390] [2021-08-21 18:15:36,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:15:36,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:36,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:15:36,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:15:36,921 INFO L87 Difference]: Start difference. First operand 36 states and 64 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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) [2021-08-21 18:15:36,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:36,942 INFO L93 Difference]: Finished difference Result 142 states and 237 transitions. [2021-08-21 18:15:36,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:15:36,943 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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 22 [2021-08-21 18:15:36,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:36,944 INFO L225 Difference]: With dead ends: 142 [2021-08-21 18:15:36,944 INFO L226 Difference]: Without dead ends: 135 [2021-08-21 18:15:36,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:15:36,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-08-21 18:15:36,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 100. [2021-08-21 18:15:36,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.97979797979798) internal successors, (196), 99 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:36,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 196 transitions. [2021-08-21 18:15:36,949 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 196 transitions. Word has length 22 [2021-08-21 18:15:36,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:36,949 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 196 transitions. [2021-08-21 18:15:36,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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) [2021-08-21 18:15:36,949 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 196 transitions. [2021-08-21 18:15:36,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:15:36,950 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:36,950 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:36,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 18:15:37,161 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 [2021-08-21 18:15:37,161 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:37,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:37,161 INFO L82 PathProgramCache]: Analyzing trace with hash 426124820, now seen corresponding path program 12 times [2021-08-21 18:15:37,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:37,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312210994] [2021-08-21 18:15:37,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:37,162 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:37,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:37,417 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:37,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:37,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312210994] [2021-08-21 18:15:37,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312210994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:37,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912807498] [2021-08-21 18:15:37,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:15:37,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:37,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:37,421 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) [2021-08-21 18:15:37,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 18:15:37,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:15:37,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:37,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:15:37,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:38,100 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:15:38,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-08-21 18:15:38,115 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:38,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912807498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:38,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:38,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-21 18:15:38,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273448094] [2021-08-21 18:15:38,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:15:38,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:38,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:15:38,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:15:38,117 INFO L87 Difference]: Start difference. First operand 100 states and 196 transitions. Second operand has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:39,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:39,824 INFO L93 Difference]: Finished difference Result 611 states and 1030 transitions. [2021-08-21 18:15:39,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-21 18:15:39,825 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:15:39,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:39,827 INFO L225 Difference]: With dead ends: 611 [2021-08-21 18:15:39,827 INFO L226 Difference]: Without dead ends: 363 [2021-08-21 18:15:39,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 1855.3ms TimeCoverageRelationStatistics Valid=1224, Invalid=5256, Unknown=0, NotChecked=0, Total=6480 [2021-08-21 18:15:39,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-08-21 18:15:39,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 111. [2021-08-21 18:15:39,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0) internal successors, (220), 110 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:39,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 220 transitions. [2021-08-21 18:15:39,835 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 220 transitions. Word has length 23 [2021-08-21 18:15:39,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:39,835 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 220 transitions. [2021-08-21 18:15:39,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:39,835 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 220 transitions. [2021-08-21 18:15:39,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 18:15:39,836 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:39,836 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:39,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 18:15:40,048 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 [2021-08-21 18:15:40,049 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:40,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:40,049 INFO L82 PathProgramCache]: Analyzing trace with hash 175436708, now seen corresponding path program 13 times [2021-08-21 18:15:40,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:40,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247764573] [2021-08-21 18:15:40,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:40,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:40,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:40,336 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:40,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:40,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247764573] [2021-08-21 18:15:40,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247764573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:40,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800187684] [2021-08-21 18:15:40,336 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:15:40,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:40,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:40,338 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) [2021-08-21 18:15:40,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 18:15:40,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:40,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 18:15:40,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:40,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:15:40,634 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:40,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800187684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:40,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:40,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-08-21 18:15:40,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715546142] [2021-08-21 18:15:40,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:15:40,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:40,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:15:40,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:15:40,636 INFO L87 Difference]: Start difference. First operand 111 states and 220 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 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) [2021-08-21 18:15:41,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:41,105 INFO L93 Difference]: Finished difference Result 233 states and 409 transitions. [2021-08-21 18:15:41,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:15:41,105 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 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 25 [2021-08-21 18:15:41,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:41,106 INFO L225 Difference]: With dead ends: 233 [2021-08-21 18:15:41,106 INFO L226 Difference]: Without dead ends: 157 [2021-08-21 18:15:41,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 501.8ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 18:15:41,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-08-21 18:15:41,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 44. [2021-08-21 18:15:41,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8604651162790697) internal successors, (80), 43 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:41,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 80 transitions. [2021-08-21 18:15:41,109 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 80 transitions. Word has length 25 [2021-08-21 18:15:41,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:41,110 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 80 transitions. [2021-08-21 18:15:41,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 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) [2021-08-21 18:15:41,110 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 80 transitions. [2021-08-21 18:15:41,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:15:41,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:41,110 INFO L512 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:41,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 18:15:41,333 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 [2021-08-21 18:15:41,333 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:41,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:41,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1166648883, now seen corresponding path program 14 times [2021-08-21 18:15:41,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:41,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269637389] [2021-08-21 18:15:41,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:41,334 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:41,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:41,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269637389] [2021-08-21 18:15:41,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269637389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:41,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868644097] [2021-08-21 18:15:41,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:15:41,445 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:41,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:41,446 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) [2021-08-21 18:15:41,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 18:15:41,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:15:41,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:41,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 18:15:41,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:41,679 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:41,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868644097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:41,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:41,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 18:15:41,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692370944] [2021-08-21 18:15:41,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:15:41,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:41,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:15:41,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:15:41,680 INFO L87 Difference]: Start difference. First operand 44 states and 80 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:41,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:41,714 INFO L93 Difference]: Finished difference Result 198 states and 339 transitions. [2021-08-21 18:15:41,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:15:41,714 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:15:41,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:41,715 INFO L225 Difference]: With dead ends: 198 [2021-08-21 18:15:41,715 INFO L226 Difference]: Without dead ends: 189 [2021-08-21 18:15:41,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:15:41,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-08-21 18:15:41,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 144. [2021-08-21 18:15:41,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.0) internal successors, (286), 143 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:41,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 286 transitions. [2021-08-21 18:15:41,720 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 286 transitions. Word has length 26 [2021-08-21 18:15:41,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:41,720 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 286 transitions. [2021-08-21 18:15:41,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:41,720 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 286 transitions. [2021-08-21 18:15:41,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 18:15:41,721 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:41,721 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:41,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 18:15:41,945 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 [2021-08-21 18:15:41,945 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:41,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:41,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1501895724, now seen corresponding path program 15 times [2021-08-21 18:15:41,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:41,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400107476] [2021-08-21 18:15:41,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:41,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:42,286 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:42,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:42,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400107476] [2021-08-21 18:15:42,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400107476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:42,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603748178] [2021-08-21 18:15:42,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:15:42,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:42,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:42,287 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) [2021-08-21 18:15:42,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 18:15:42,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 18:15:42,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:42,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-21 18:15:42,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:42,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:15:42,611 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:42,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603748178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:42,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:42,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-08-21 18:15:42,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536419778] [2021-08-21 18:15:42,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 18:15:42,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:42,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 18:15:42,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:15:42,613 INFO L87 Difference]: Start difference. First operand 144 states and 286 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 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) [2021-08-21 18:15:43,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:43,176 INFO L93 Difference]: Finished difference Result 293 states and 518 transitions. [2021-08-21 18:15:43,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:15:43,176 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 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 27 [2021-08-21 18:15:43,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:43,177 INFO L225 Difference]: With dead ends: 293 [2021-08-21 18:15:43,177 INFO L226 Difference]: Without dead ends: 191 [2021-08-21 18:15:43,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 621.3ms TimeCoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 18:15:43,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-08-21 18:15:43,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 48. [2021-08-21 18:15:43,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.872340425531915) internal successors, (88), 47 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) [2021-08-21 18:15:43,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 88 transitions. [2021-08-21 18:15:43,180 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 88 transitions. Word has length 27 [2021-08-21 18:15:43,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:43,181 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 88 transitions. [2021-08-21 18:15:43,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 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) [2021-08-21 18:15:43,181 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 88 transitions. [2021-08-21 18:15:43,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:15:43,181 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:43,181 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:43,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-21 18:15:43,396 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 [2021-08-21 18:15:43,397 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:43,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:43,397 INFO L82 PathProgramCache]: Analyzing trace with hash 708951043, now seen corresponding path program 16 times [2021-08-21 18:15:43,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:43,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073845997] [2021-08-21 18:15:43,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:43,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:43,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:43,517 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:43,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:43,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073845997] [2021-08-21 18:15:43,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073845997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:43,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755634354] [2021-08-21 18:15:43,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:15:43,517 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:43,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:43,518 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) [2021-08-21 18:15:43,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 18:15:43,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:15:43,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:43,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:15:43,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:43,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755634354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:43,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:43,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 18:15:43,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744680347] [2021-08-21 18:15:43,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:15:43,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:43,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:15:43,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:15:43,790 INFO L87 Difference]: Start difference. First operand 48 states and 88 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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) [2021-08-21 18:15:43,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:43,820 INFO L93 Difference]: Finished difference Result 229 states and 396 transitions. [2021-08-21 18:15:43,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 18:15:43,820 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 28 [2021-08-21 18:15:43,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:43,822 INFO L225 Difference]: With dead ends: 229 [2021-08-21 18:15:43,822 INFO L226 Difference]: Without dead ends: 219 [2021-08-21 18:15:43,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:15:43,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-08-21 18:15:43,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 169. [2021-08-21 18:15:43,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.005952380952381) internal successors, (337), 168 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:43,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 337 transitions. [2021-08-21 18:15:43,827 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 337 transitions. Word has length 28 [2021-08-21 18:15:43,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:43,827 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 337 transitions. [2021-08-21 18:15:43,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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) [2021-08-21 18:15:43,827 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 337 transitions. [2021-08-21 18:15:43,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:15:43,828 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:43,828 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:43,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 18:15:44,048 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 [2021-08-21 18:15:44,049 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:44,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:44,049 INFO L82 PathProgramCache]: Analyzing trace with hash 333059428, now seen corresponding path program 17 times [2021-08-21 18:15:44,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:44,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306706508] [2021-08-21 18:15:44,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:44,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:44,403 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:44,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:44,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306706508] [2021-08-21 18:15:44,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306706508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:44,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859795523] [2021-08-21 18:15:44,403 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:15:44,403 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:44,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:44,404 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) [2021-08-21 18:15:44,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 18:15:44,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 18:15:44,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:44,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 18:15:44,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:44,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:15:44,753 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:44,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859795523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:44,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:44,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-08-21 18:15:44,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070820650] [2021-08-21 18:15:44,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:15:44,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:44,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:15:44,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:15:44,755 INFO L87 Difference]: Start difference. First operand 169 states and 337 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:45,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:45,408 INFO L93 Difference]: Finished difference Result 344 states and 614 transitions. [2021-08-21 18:15:45,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:15:45,409 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:15:45,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:45,410 INFO L225 Difference]: With dead ends: 344 [2021-08-21 18:15:45,410 INFO L226 Difference]: Without dead ends: 226 [2021-08-21 18:15:45,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 692.3ms TimeCoverageRelationStatistics Valid=303, Invalid=1503, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 18:15:45,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-08-21 18:15:45,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 52. [2021-08-21 18:15:45,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.8823529411764706) internal successors, (96), 51 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:45,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 96 transitions. [2021-08-21 18:15:45,419 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 96 transitions. Word has length 29 [2021-08-21 18:15:45,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:45,419 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 96 transitions. [2021-08-21 18:15:45,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:45,420 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 96 transitions. [2021-08-21 18:15:45,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:15:45,422 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:45,422 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:45,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 18:15:45,640 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 [2021-08-21 18:15:45,641 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:45,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:45,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1757985907, now seen corresponding path program 18 times [2021-08-21 18:15:45,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:45,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135025356] [2021-08-21 18:15:45,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:45,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:45,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:45,810 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:45,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:45,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135025356] [2021-08-21 18:15:45,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135025356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:45,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108073057] [2021-08-21 18:15:45,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:15:45,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:45,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:45,812 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) [2021-08-21 18:15:45,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 18:15:46,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 18:15:46,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:46,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 18:15:46,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:46,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108073057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:46,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:46,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 18:15:46,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238424216] [2021-08-21 18:15:46,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:15:46,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:46,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:15:46,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:15:46,123 INFO L87 Difference]: Start difference. First operand 52 states and 96 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 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) [2021-08-21 18:15:46,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:46,159 INFO L93 Difference]: Finished difference Result 262 states and 457 transitions. [2021-08-21 18:15:46,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 18:15:46,160 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 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 30 [2021-08-21 18:15:46,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:46,161 INFO L225 Difference]: With dead ends: 262 [2021-08-21 18:15:46,161 INFO L226 Difference]: Without dead ends: 251 [2021-08-21 18:15:46,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:15:46,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-08-21 18:15:46,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 196. [2021-08-21 18:15:46,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.01025641025641) internal successors, (392), 195 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:46,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 392 transitions. [2021-08-21 18:15:46,166 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 392 transitions. Word has length 30 [2021-08-21 18:15:46,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:46,166 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 392 transitions. [2021-08-21 18:15:46,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 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) [2021-08-21 18:15:46,166 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 392 transitions. [2021-08-21 18:15:46,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:15:46,167 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:46,167 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:46,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 18:15:46,380 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 [2021-08-21 18:15:46,381 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:46,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:46,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1303396756, now seen corresponding path program 19 times [2021-08-21 18:15:46,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:46,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775243343] [2021-08-21 18:15:46,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:46,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:46,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:46,749 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:46,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:46,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775243343] [2021-08-21 18:15:46,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775243343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:46,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321693138] [2021-08-21 18:15:46,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:15:46,749 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:46,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:46,750 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) [2021-08-21 18:15:46,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 18:15:46,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:46,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 18:15:46,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:47,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:15:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:47,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321693138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:47,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:47,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-08-21 18:15:47,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802387598] [2021-08-21 18:15:47,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:15:47,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:47,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:15:47,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:15:47,126 INFO L87 Difference]: Start difference. First operand 196 states and 392 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 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) [2021-08-21 18:15:47,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:47,873 INFO L93 Difference]: Finished difference Result 399 states and 718 transitions. [2021-08-21 18:15:47,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:15:47,873 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 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 31 [2021-08-21 18:15:47,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:47,875 INFO L225 Difference]: With dead ends: 399 [2021-08-21 18:15:47,875 INFO L226 Difference]: Without dead ends: 264 [2021-08-21 18:15:47,875 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 786.4ms TimeCoverageRelationStatistics Valid=355, Invalid=1807, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 18:15:47,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-08-21 18:15:47,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 56. [2021-08-21 18:15:47,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.8909090909090909) internal successors, (104), 55 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) [2021-08-21 18:15:47,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 104 transitions. [2021-08-21 18:15:47,878 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 104 transitions. Word has length 31 [2021-08-21 18:15:47,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:47,878 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 104 transitions. [2021-08-21 18:15:47,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 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) [2021-08-21 18:15:47,879 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 104 transitions. [2021-08-21 18:15:47,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:15:47,879 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:47,879 INFO L512 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:47,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 18:15:48,088 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 [2021-08-21 18:15:48,089 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:48,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:48,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1773672003, now seen corresponding path program 20 times [2021-08-21 18:15:48,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:48,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025979000] [2021-08-21 18:15:48,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:48,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:48,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:48,236 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:48,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:48,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025979000] [2021-08-21 18:15:48,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025979000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:48,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012167616] [2021-08-21 18:15:48,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:15:48,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:48,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:48,252 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) [2021-08-21 18:15:48,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 18:15:48,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:15:48,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:48,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 18:15:48,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:48,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012167616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:48,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:48,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 18:15:48,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928861175] [2021-08-21 18:15:48,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:15:48,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:48,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:15:48,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:15:48,595 INFO L87 Difference]: Start difference. First operand 56 states and 104 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:48,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:48,629 INFO L93 Difference]: Finished difference Result 297 states and 522 transitions. [2021-08-21 18:15:48,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:15:48,630 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:15:48,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:48,631 INFO L225 Difference]: With dead ends: 297 [2021-08-21 18:15:48,631 INFO L226 Difference]: Without dead ends: 285 [2021-08-21 18:15:48,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:15:48,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-08-21 18:15:48,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 225. [2021-08-21 18:15:48,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.013392857142857) internal successors, (451), 224 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:48,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 451 transitions. [2021-08-21 18:15:48,637 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 451 transitions. Word has length 32 [2021-08-21 18:15:48,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:48,638 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 451 transitions. [2021-08-21 18:15:48,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:48,638 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 451 transitions. [2021-08-21 18:15:48,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:15:48,638 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:48,639 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:48,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 18:15:48,856 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 [2021-08-21 18:15:48,856 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:48,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:48,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1294805212, now seen corresponding path program 21 times [2021-08-21 18:15:48,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:48,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874100959] [2021-08-21 18:15:48,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:48,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:49,282 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:49,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:49,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874100959] [2021-08-21 18:15:49,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874100959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:49,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915149920] [2021-08-21 18:15:49,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:15:49,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:49,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:49,283 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) [2021-08-21 18:15:49,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 18:15:49,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 18:15:49,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:49,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 18:15:49,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:50,766 INFO L354 Elim1Store]: treesize reduction 64, result has 4.5 percent of original size [2021-08-21 18:15:50,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 26 [2021-08-21 18:15:50,785 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:50,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915149920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:50,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:50,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 47 [2021-08-21 18:15:50,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246318169] [2021-08-21 18:15:50,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-21 18:15:50,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:50,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-21 18:15:50,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2105, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 18:15:50,787 INFO L87 Difference]: Start difference. First operand 225 states and 451 transitions. Second operand has 48 states, 48 states have (on average 1.1875) internal successors, (57), 47 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) [2021-08-21 18:15:52,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:52,447 INFO L93 Difference]: Finished difference Result 878 states and 1659 transitions. [2021-08-21 18:15:52,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 18:15:52,447 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1875) internal successors, (57), 47 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 33 [2021-08-21 18:15:52,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:52,450 INFO L225 Difference]: With dead ends: 878 [2021-08-21 18:15:52,450 INFO L226 Difference]: Without dead ends: 505 [2021-08-21 18:15:52,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1481 ImplicationChecksByTransitivity, 2071.3ms TimeCoverageRelationStatistics Valid=701, Invalid=5941, Unknown=0, NotChecked=0, Total=6642 [2021-08-21 18:15:52,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-08-21 18:15:52,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 62. [2021-08-21 18:15:52,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.901639344262295) internal successors, (116), 61 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) [2021-08-21 18:15:52,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 116 transitions. [2021-08-21 18:15:52,456 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 116 transitions. Word has length 33 [2021-08-21 18:15:52,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:52,456 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 116 transitions. [2021-08-21 18:15:52,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1875) internal successors, (57), 47 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) [2021-08-21 18:15:52,456 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 116 transitions. [2021-08-21 18:15:52,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:15:52,457 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:52,457 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:52,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 18:15:52,680 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 [2021-08-21 18:15:52,680 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:52,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:52,681 INFO L82 PathProgramCache]: Analyzing trace with hash 374751060, now seen corresponding path program 22 times [2021-08-21 18:15:52,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:52,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766473747] [2021-08-21 18:15:52,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:52,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:53,205 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:53,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:53,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766473747] [2021-08-21 18:15:53,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766473747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:53,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874593536] [2021-08-21 18:15:53,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:15:53,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:53,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:53,207 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) [2021-08-21 18:15:53,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 18:15:53,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:15:53,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:53,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 55 conjunts are in the unsatisfiable core [2021-08-21 18:15:53,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:53,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:15:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:53,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874593536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:53,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:53,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2021-08-21 18:15:53,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456822381] [2021-08-21 18:15:53,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 18:15:53,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:53,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 18:15:53,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:15:53,666 INFO L87 Difference]: Start difference. First operand 62 states and 116 transitions. Second operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:54,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:54,701 INFO L93 Difference]: Finished difference Result 67 states and 123 transitions. [2021-08-21 18:15:54,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:15:54,702 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:15:54,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:54,703 INFO L225 Difference]: With dead ends: 67 [2021-08-21 18:15:54,703 INFO L226 Difference]: Without dead ends: 64 [2021-08-21 18:15:54,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1165.6ms TimeCoverageRelationStatistics Valid=471, Invalid=2499, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 18:15:54,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-21 18:15:54,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-08-21 18:15:54,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.9047619047619047) internal successors, (120), 63 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:54,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 120 transitions. [2021-08-21 18:15:54,705 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 120 transitions. Word has length 35 [2021-08-21 18:15:54,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:54,705 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 120 transitions. [2021-08-21 18:15:54,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:54,706 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 120 transitions. [2021-08-21 18:15:54,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:15:54,706 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:54,706 INFO L512 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:54,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 18:15:54,929 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 [2021-08-21 18:15:54,930 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:54,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:54,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1244540797, now seen corresponding path program 23 times [2021-08-21 18:15:54,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:54,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638858724] [2021-08-21 18:15:54,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:54,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:54,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:55,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:55,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638858724] [2021-08-21 18:15:55,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638858724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:55,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596221594] [2021-08-21 18:15:55,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:15:55,133 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:55,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:55,133 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) [2021-08-21 18:15:55,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 18:15:55,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 18:15:55,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:55,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:15:55,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:55,550 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:55,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596221594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:55,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:55,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-21 18:15:55,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391593549] [2021-08-21 18:15:55,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:15:55,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:55,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:15:55,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:15:55,552 INFO L87 Difference]: Start difference. First operand 64 states and 120 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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) [2021-08-21 18:15:55,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:55,587 INFO L93 Difference]: Finished difference Result 373 states and 664 transitions. [2021-08-21 18:15:55,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 18:15:55,590 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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 36 [2021-08-21 18:15:55,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:55,591 INFO L225 Difference]: With dead ends: 373 [2021-08-21 18:15:55,591 INFO L226 Difference]: Without dead ends: 359 [2021-08-21 18:15:55,592 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:15:55,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-08-21 18:15:55,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 289. [2021-08-21 18:15:55,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.017361111111111) internal successors, (581), 288 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:55,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 581 transitions. [2021-08-21 18:15:55,609 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 581 transitions. Word has length 36 [2021-08-21 18:15:55,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:55,609 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 581 transitions. [2021-08-21 18:15:55,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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) [2021-08-21 18:15:55,610 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 581 transitions. [2021-08-21 18:15:55,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:15:55,611 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:55,611 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:55,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 18:15:55,832 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 [2021-08-21 18:15:55,833 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:55,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:55,833 INFO L82 PathProgramCache]: Analyzing trace with hash 2146384100, now seen corresponding path program 24 times [2021-08-21 18:15:55,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:55,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660524710] [2021-08-21 18:15:55,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:55,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:56,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:56,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660524710] [2021-08-21 18:15:56,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660524710] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:56,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721169286] [2021-08-21 18:15:56,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:15:56,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:56,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:56,374 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) [2021-08-21 18:15:56,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 18:15:56,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 18:15:56,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:56,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 61 conjunts are in the unsatisfiable core [2021-08-21 18:15:56,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:56,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:15:56,917 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:56,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721169286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:56,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:56,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-08-21 18:15:56,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49651223] [2021-08-21 18:15:56,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:15:56,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:56,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:15:56,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:15:56,919 INFO L87 Difference]: Start difference. First operand 289 states and 581 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 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) [2021-08-21 18:15:58,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:58,285 INFO L93 Difference]: Finished difference Result 588 states and 1078 transitions. [2021-08-21 18:15:58,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 18:15:58,285 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 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 37 [2021-08-21 18:15:58,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:58,287 INFO L225 Difference]: With dead ends: 588 [2021-08-21 18:15:58,287 INFO L226 Difference]: Without dead ends: 396 [2021-08-21 18:15:58,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1394.7ms TimeCoverageRelationStatistics Valid=535, Invalid=2887, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 18:15:58,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-08-21 18:15:58,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 68. [2021-08-21 18:15:58,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9104477611940298) internal successors, (128), 67 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) [2021-08-21 18:15:58,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 128 transitions. [2021-08-21 18:15:58,292 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 128 transitions. Word has length 37 [2021-08-21 18:15:58,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:58,292 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 128 transitions. [2021-08-21 18:15:58,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 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) [2021-08-21 18:15:58,293 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 128 transitions. [2021-08-21 18:15:58,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 18:15:58,293 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:58,293 INFO L512 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:58,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 18:15:58,508 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 [2021-08-21 18:15:58,509 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:58,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:58,509 INFO L82 PathProgramCache]: Analyzing trace with hash 2136475891, now seen corresponding path program 25 times [2021-08-21 18:15:58,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:58,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565124696] [2021-08-21 18:15:58,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:58,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:58,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:58,714 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:58,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:58,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565124696] [2021-08-21 18:15:58,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565124696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:58,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372042992] [2021-08-21 18:15:58,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:15:58,715 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:58,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:58,716 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) [2021-08-21 18:15:58,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 18:15:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:59,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:15:59,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:59,180 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:59,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372042992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:59,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:59,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-08-21 18:15:59,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978549379] [2021-08-21 18:15:59,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:15:59,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:59,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:15:59,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:15:59,182 INFO L87 Difference]: Start difference. First operand 68 states and 128 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:59,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:59,222 INFO L93 Difference]: Finished difference Result 414 states and 741 transitions. [2021-08-21 18:15:59,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:15:59,225 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:15:59,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:59,226 INFO L225 Difference]: With dead ends: 414 [2021-08-21 18:15:59,226 INFO L226 Difference]: Without dead ends: 399 [2021-08-21 18:15:59,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 127.9ms TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:15:59,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-08-21 18:15:59,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 324. [2021-08-21 18:15:59,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.018575851393189) internal successors, (652), 323 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) [2021-08-21 18:15:59,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 652 transitions. [2021-08-21 18:15:59,233 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 652 transitions. Word has length 38 [2021-08-21 18:15:59,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:59,233 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 652 transitions. [2021-08-21 18:15:59,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:15:59,233 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 652 transitions. [2021-08-21 18:15:59,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:15:59,234 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:59,234 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:59,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 18:15:59,448 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 [2021-08-21 18:15:59,449 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:59,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:59,449 INFO L82 PathProgramCache]: Analyzing trace with hash 935124244, now seen corresponding path program 26 times [2021-08-21 18:15:59,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:59,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306127028] [2021-08-21 18:15:59,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:59,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:59,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:00,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:16:00,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306127028] [2021-08-21 18:16:00,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306127028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:00,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147517461] [2021-08-21 18:16:00,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:16:00,059 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:00,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:16:00,060 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) [2021-08-21 18:16:00,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 18:16:00,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:16:00,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:16:00,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 63 conjunts are in the unsatisfiable core [2021-08-21 18:16:00,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:16:00,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:16:00,635 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:00,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147517461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:00,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:16:00,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-08-21 18:16:00,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771775640] [2021-08-21 18:16:00,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 18:16:00,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:16:00,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 18:16:00,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:16:00,637 INFO L87 Difference]: Start difference. First operand 324 states and 652 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 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) [2021-08-21 18:16:01,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:16:01,974 INFO L93 Difference]: Finished difference Result 659 states and 1214 transitions. [2021-08-21 18:16:01,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 18:16:01,974 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 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 39 [2021-08-21 18:16:01,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:16:01,976 INFO L225 Difference]: With dead ends: 659 [2021-08-21 18:16:01,976 INFO L226 Difference]: Without dead ends: 446 [2021-08-21 18:16:01,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1470.0ms TimeCoverageRelationStatistics Valid=603, Invalid=3303, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 18:16:01,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-08-21 18:16:01,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 72. [2021-08-21 18:16:01,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.9154929577464788) internal successors, (136), 71 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:01,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 136 transitions. [2021-08-21 18:16:01,980 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 136 transitions. Word has length 39 [2021-08-21 18:16:01,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:16:01,980 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 136 transitions. [2021-08-21 18:16:01,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 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) [2021-08-21 18:16:01,980 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 136 transitions. [2021-08-21 18:16:01,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 18:16:01,981 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:16:01,981 INFO L512 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:16:02,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 18:16:02,204 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 [2021-08-21 18:16:02,204 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:16:02,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:16:02,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1052841277, now seen corresponding path program 27 times [2021-08-21 18:16:02,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:16:02,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311994099] [2021-08-21 18:16:02,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:16:02,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:16:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:02,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:16:02,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311994099] [2021-08-21 18:16:02,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311994099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:02,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607497299] [2021-08-21 18:16:02,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:16:02,401 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:02,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:16:02,401 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) [2021-08-21 18:16:02,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 18:16:02,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-21 18:16:02,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:16:02,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:16:02,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:16:02,913 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:02,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607497299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:02,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:16:02,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-08-21 18:16:02,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708781549] [2021-08-21 18:16:02,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:16:02,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:16:02,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:16:02,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:16:02,914 INFO L87 Difference]: Start difference. First operand 72 states and 136 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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) [2021-08-21 18:16:02,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:16:02,956 INFO L93 Difference]: Finished difference Result 457 states and 822 transitions. [2021-08-21 18:16:02,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:16:02,956 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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 40 [2021-08-21 18:16:02,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:16:02,958 INFO L225 Difference]: With dead ends: 457 [2021-08-21 18:16:02,958 INFO L226 Difference]: Without dead ends: 441 [2021-08-21 18:16:02,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 127.1ms TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:16:02,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-08-21 18:16:02,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 361. [2021-08-21 18:16:02,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 2.0194444444444444) internal successors, (727), 360 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:02,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 727 transitions. [2021-08-21 18:16:02,964 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 727 transitions. Word has length 40 [2021-08-21 18:16:02,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:16:02,965 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 727 transitions. [2021-08-21 18:16:02,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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) [2021-08-21 18:16:02,965 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 727 transitions. [2021-08-21 18:16:02,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 18:16:02,966 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:16:02,966 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:16:02,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 18:16:03,189 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 [2021-08-21 18:16:03,189 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:16:03,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:16:03,190 INFO L82 PathProgramCache]: Analyzing trace with hash -205571420, now seen corresponding path program 28 times [2021-08-21 18:16:03,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:16:03,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040342211] [2021-08-21 18:16:03,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:16:03,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:16:03,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:03,913 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:03,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:16:03,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040342211] [2021-08-21 18:16:03,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040342211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:03,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18023850] [2021-08-21 18:16:03,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:16:03,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:03,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:16:03,915 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) [2021-08-21 18:16:03,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 18:16:04,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:16:04,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:16:04,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 67 conjunts are in the unsatisfiable core [2021-08-21 18:16:04,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:16:04,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:16:04,496 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:04,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18023850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:04,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:16:04,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-08-21 18:16:04,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265692302] [2021-08-21 18:16:04,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 18:16:04,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:16:04,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 18:16:04,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 18:16:04,498 INFO L87 Difference]: Start difference. First operand 361 states and 727 transitions. Second operand has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:06,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:16:06,033 INFO L93 Difference]: Finished difference Result 734 states and 1358 transitions. [2021-08-21 18:16:06,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:16:06,033 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:16:06,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:16:06,034 INFO L225 Difference]: With dead ends: 734 [2021-08-21 18:16:06,034 INFO L226 Difference]: Without dead ends: 499 [2021-08-21 18:16:06,035 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1721.3ms TimeCoverageRelationStatistics Valid=675, Invalid=3747, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 18:16:06,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-08-21 18:16:06,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 76. [2021-08-21 18:16:06,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.92) internal successors, (144), 75 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:06,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 144 transitions. [2021-08-21 18:16:06,039 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 144 transitions. Word has length 41 [2021-08-21 18:16:06,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:16:06,039 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 144 transitions. [2021-08-21 18:16:06,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:06,039 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 144 transitions. [2021-08-21 18:16:06,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 18:16:06,040 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:16:06,040 INFO L512 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:16:06,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 18:16:06,260 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 [2021-08-21 18:16:06,261 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:16:06,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:16:06,261 INFO L82 PathProgramCache]: Analyzing trace with hash -2054668493, now seen corresponding path program 29 times [2021-08-21 18:16:06,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:16:06,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741471164] [2021-08-21 18:16:06,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:16:06,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:16:06,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:06,500 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:06,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:16:06,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741471164] [2021-08-21 18:16:06,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741471164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:06,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659351858] [2021-08-21 18:16:06,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:16:06,500 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:06,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:16:06,505 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) [2021-08-21 18:16:06,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 18:16:06,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-21 18:16:07,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:16:07,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:16:07,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:16:07,149 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:07,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659351858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:07,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:16:07,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 19 [2021-08-21 18:16:07,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154503519] [2021-08-21 18:16:07,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:16:07,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:16:07,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:16:07,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:16:07,150 INFO L87 Difference]: Start difference. First operand 76 states and 144 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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) [2021-08-21 18:16:07,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:16:07,194 INFO L93 Difference]: Finished difference Result 502 states and 907 transitions. [2021-08-21 18:16:07,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:16:07,194 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 42 [2021-08-21 18:16:07,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:16:07,196 INFO L225 Difference]: With dead ends: 502 [2021-08-21 18:16:07,196 INFO L226 Difference]: Without dead ends: 485 [2021-08-21 18:16:07,196 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 164.6ms TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:16:07,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-08-21 18:16:07,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 400. [2021-08-21 18:16:07,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.020050125313283) internal successors, (806), 399 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:07,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 806 transitions. [2021-08-21 18:16:07,203 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 806 transitions. Word has length 42 [2021-08-21 18:16:07,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:16:07,203 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 806 transitions. [2021-08-21 18:16:07,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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) [2021-08-21 18:16:07,203 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 806 transitions. [2021-08-21 18:16:07,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:16:07,204 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:16:07,204 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:16:07,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 18:16:07,428 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 [2021-08-21 18:16:07,428 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:16:07,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:16:07,428 INFO L82 PathProgramCache]: Analyzing trace with hash 422845140, now seen corresponding path program 30 times [2021-08-21 18:16:07,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:16:07,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131073066] [2021-08-21 18:16:07,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:16:07,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:16:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:08,189 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:08,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:16:08,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131073066] [2021-08-21 18:16:08,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131073066] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:08,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619264640] [2021-08-21 18:16:08,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:16:08,189 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:08,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:16:08,190 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) [2021-08-21 18:16:08,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 18:16:08,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-21 18:16:08,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:16:08,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 18:16:08,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:16:10,622 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:16:10,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-08-21 18:16:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 136 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:10,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619264640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:10,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:16:10,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2021-08-21 18:16:10,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558939850] [2021-08-21 18:16:10,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-08-21 18:16:10,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:16:10,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-08-21 18:16:10,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=700, Invalid=4270, Unknown=0, NotChecked=0, Total=4970 [2021-08-21 18:16:10,638 INFO L87 Difference]: Start difference. First operand 400 states and 806 transitions. Second operand has 71 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 70 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) [2021-08-21 18:16:26,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:16:26,178 INFO L93 Difference]: Finished difference Result 3756 states and 6815 transitions. [2021-08-21 18:16:26,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2021-08-21 18:16:26,178 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 70 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 43 [2021-08-21 18:16:26,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:16:26,185 INFO L225 Difference]: With dead ends: 3756 [2021-08-21 18:16:26,185 INFO L226 Difference]: Without dead ends: 2648 [2021-08-21 18:16:26,190 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23730 ImplicationChecksByTransitivity, 16185.1ms TimeCoverageRelationStatistics Valid=13164, Invalid=62736, Unknown=0, NotChecked=0, Total=75900 [2021-08-21 18:16:26,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2021-08-21 18:16:26,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 421. [2021-08-21 18:16:26,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.0238095238095237) internal successors, (850), 420 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:26,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 850 transitions. [2021-08-21 18:16:26,209 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 850 transitions. Word has length 43 [2021-08-21 18:16:26,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:16:26,209 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 850 transitions. [2021-08-21 18:16:26,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 70 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) [2021-08-21 18:16:26,209 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 850 transitions. [2021-08-21 18:16:26,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-21 18:16:26,210 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:16:26,210 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:16:26,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-21 18:16:26,434 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 [2021-08-21 18:16:26,435 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:16:26,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:16:26,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1725095012, now seen corresponding path program 31 times [2021-08-21 18:16:26,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:16:26,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524273081] [2021-08-21 18:16:26,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:16:26,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:16:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:27,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:16:27,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524273081] [2021-08-21 18:16:27,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524273081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:27,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269066350] [2021-08-21 18:16:27,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:16:27,235 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:27,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:16:27,236 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) [2021-08-21 18:16:27,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 18:16:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:27,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 75 conjunts are in the unsatisfiable core [2021-08-21 18:16:27,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:16:27,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:16:27,944 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:27,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269066350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:27,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:16:27,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-08-21 18:16:27,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522058556] [2021-08-21 18:16:27,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 18:16:27,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:16:27,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 18:16:27,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 18:16:27,946 INFO L87 Difference]: Start difference. First operand 421 states and 850 transitions. Second operand has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 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) [2021-08-21 18:16:29,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:16:29,878 INFO L93 Difference]: Finished difference Result 873 states and 1629 transitions. [2021-08-21 18:16:29,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:16:29,878 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 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 45 [2021-08-21 18:16:29,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:16:29,880 INFO L225 Difference]: With dead ends: 873 [2021-08-21 18:16:29,880 INFO L226 Difference]: Without dead ends: 612 [2021-08-21 18:16:29,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 2077.1ms TimeCoverageRelationStatistics Valid=831, Invalid=4719, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 18:16:29,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-08-21 18:16:29,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 84. [2021-08-21 18:16:29,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.927710843373494) internal successors, (160), 83 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:29,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 160 transitions. [2021-08-21 18:16:29,886 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 160 transitions. Word has length 45 [2021-08-21 18:16:29,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:16:29,886 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 160 transitions. [2021-08-21 18:16:29,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 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) [2021-08-21 18:16:29,886 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 160 transitions. [2021-08-21 18:16:29,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 18:16:29,887 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:16:29,887 INFO L512 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:16:29,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-21 18:16:30,105 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 [2021-08-21 18:16:30,105 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:16:30,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:16:30,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1961416051, now seen corresponding path program 32 times [2021-08-21 18:16:30,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:16:30,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631302703] [2021-08-21 18:16:30,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:16:30,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:16:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:30,349 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:30,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:16:30,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631302703] [2021-08-21 18:16:30,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631302703] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:30,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342978966] [2021-08-21 18:16:30,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:16:30,350 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:30,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:16:30,351 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) [2021-08-21 18:16:30,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 18:16:30,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:16:30,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:16:30,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-21 18:16:30,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:16:31,000 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:31,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342978966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:31,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:16:31,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 21 [2021-08-21 18:16:31,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56985878] [2021-08-21 18:16:31,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:16:31,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:16:31,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:16:31,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:16:31,002 INFO L87 Difference]: Start difference. First operand 84 states and 160 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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) [2021-08-21 18:16:31,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:16:31,051 INFO L93 Difference]: Finished difference Result 598 states and 1089 transitions. [2021-08-21 18:16:31,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:16:31,051 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 46 [2021-08-21 18:16:31,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:16:31,053 INFO L225 Difference]: With dead ends: 598 [2021-08-21 18:16:31,053 INFO L226 Difference]: Without dead ends: 579 [2021-08-21 18:16:31,053 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 165.9ms TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:16:31,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-08-21 18:16:31,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 484. [2021-08-21 18:16:31,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 2.020703933747412) internal successors, (976), 483 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:31,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 976 transitions. [2021-08-21 18:16:31,060 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 976 transitions. Word has length 46 [2021-08-21 18:16:31,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:16:31,060 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 976 transitions. [2021-08-21 18:16:31,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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) [2021-08-21 18:16:31,060 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 976 transitions. [2021-08-21 18:16:31,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 18:16:31,061 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:16:31,061 INFO L512 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:16:31,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-21 18:16:31,280 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 [2021-08-21 18:16:31,281 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:16:31,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:16:31,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1376516244, now seen corresponding path program 33 times [2021-08-21 18:16:31,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:16:31,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260775911] [2021-08-21 18:16:31,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:16:31,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:16:31,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:32,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:16:32,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260775911] [2021-08-21 18:16:32,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260775911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:32,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422198806] [2021-08-21 18:16:32,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:16:32,209 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:32,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:16:32,209 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) [2021-08-21 18:16:32,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 18:16:32,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-21 18:16:32,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:16:32,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 79 conjunts are in the unsatisfiable core [2021-08-21 18:16:32,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:16:32,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:16:32,965 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:32,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422198806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:32,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:16:32,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2021-08-21 18:16:32,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750680092] [2021-08-21 18:16:32,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 18:16:32,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:16:32,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 18:16:32,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:16:32,967 INFO L87 Difference]: Start difference. First operand 484 states and 976 transitions. Second operand has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 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) [2021-08-21 18:16:35,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:16:35,228 INFO L93 Difference]: Finished difference Result 983 states and 1838 transitions. [2021-08-21 18:16:35,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 18:16:35,229 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 18:16:35,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:16:35,230 INFO L225 Difference]: With dead ends: 983 [2021-08-21 18:16:35,230 INFO L226 Difference]: Without dead ends: 676 [2021-08-21 18:16:35,231 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 2407.1ms TimeCoverageRelationStatistics Valid=915, Invalid=5247, Unknown=0, NotChecked=0, Total=6162 [2021-08-21 18:16:35,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-08-21 18:16:35,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 88. [2021-08-21 18:16:35,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.9310344827586208) internal successors, (168), 87 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:35,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 168 transitions. [2021-08-21 18:16:35,234 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 168 transitions. Word has length 47 [2021-08-21 18:16:35,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:16:35,234 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 168 transitions. [2021-08-21 18:16:35,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 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) [2021-08-21 18:16:35,234 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 168 transitions. [2021-08-21 18:16:35,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-21 18:16:35,234 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:16:35,234 INFO L512 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:16:35,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-21 18:16:35,448 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 [2021-08-21 18:16:35,449 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:16:35,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:16:35,449 INFO L82 PathProgramCache]: Analyzing trace with hash -254591165, now seen corresponding path program 34 times [2021-08-21 18:16:35,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:16:35,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232182865] [2021-08-21 18:16:35,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:16:35,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:16:35,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:35,712 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:35,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:16:35,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232182865] [2021-08-21 18:16:35,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232182865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:35,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636623364] [2021-08-21 18:16:35,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:16:35,713 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:35,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:16:35,713 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) [2021-08-21 18:16:35,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 18:16:36,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:16:36,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:16:36,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 18:16:36,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:16:36,390 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:36,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636623364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:36,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:16:36,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 22 [2021-08-21 18:16:36,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273159522] [2021-08-21 18:16:36,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:16:36,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:16:36,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:16:36,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:16:36,391 INFO L87 Difference]: Start difference. First operand 88 states and 168 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 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) [2021-08-21 18:16:36,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:16:36,465 INFO L93 Difference]: Finished difference Result 649 states and 1186 transitions. [2021-08-21 18:16:36,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:16:36,466 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 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 48 [2021-08-21 18:16:36,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:16:36,467 INFO L225 Difference]: With dead ends: 649 [2021-08-21 18:16:36,467 INFO L226 Difference]: Without dead ends: 629 [2021-08-21 18:16:36,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 185.6ms TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:16:36,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-08-21 18:16:36,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 529. [2021-08-21 18:16:36,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 2.0208333333333335) internal successors, (1067), 528 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:36,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1067 transitions. [2021-08-21 18:16:36,475 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1067 transitions. Word has length 48 [2021-08-21 18:16:36,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:16:36,475 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 1067 transitions. [2021-08-21 18:16:36,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 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) [2021-08-21 18:16:36,476 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1067 transitions. [2021-08-21 18:16:36,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:16:36,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:16:36,477 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:16:36,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 18:16:36,701 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 [2021-08-21 18:16:36,701 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:16:36,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:16:36,702 INFO L82 PathProgramCache]: Analyzing trace with hash 297410084, now seen corresponding path program 35 times [2021-08-21 18:16:36,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:16:36,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476496776] [2021-08-21 18:16:36,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:16:36,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:16:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:37,646 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:37,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:16:37,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476496776] [2021-08-21 18:16:37,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476496776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:37,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891158746] [2021-08-21 18:16:37,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:16:37,646 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:37,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:16:37,648 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) [2021-08-21 18:16:37,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 18:16:38,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-21 18:16:38,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:16:38,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 18:16:38,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:16:40,850 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:16:40,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-08-21 18:16:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 190 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:40,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891158746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:40,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:16:40,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 82 [2021-08-21 18:16:40,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850437145] [2021-08-21 18:16:40,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-08-21 18:16:40,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:16:40,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-08-21 18:16:40,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=943, Invalid=5863, Unknown=0, NotChecked=0, Total=6806 [2021-08-21 18:16:40,869 INFO L87 Difference]: Start difference. First operand 529 states and 1067 transitions. Second operand has 83 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 82 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) [2021-08-21 18:17:06,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:17:06,380 INFO L93 Difference]: Finished difference Result 5486 states and 10065 transitions. [2021-08-21 18:17:06,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 294 states. [2021-08-21 18:17:06,380 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 82 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 49 [2021-08-21 18:17:06,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:17:06,392 INFO L225 Difference]: With dead ends: 5486 [2021-08-21 18:17:06,392 INFO L226 Difference]: Without dead ends: 4003 [2021-08-21 18:17:06,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 352 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41000 ImplicationChecksByTransitivity, 26093.0ms TimeCoverageRelationStatistics Valid=21491, Invalid=103471, Unknown=0, NotChecked=0, Total=124962 [2021-08-21 18:17:06,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4003 states. [2021-08-21 18:17:06,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4003 to 553. [2021-08-21 18:17:06,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 2.023550724637681) internal successors, (1117), 552 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:06,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1117 transitions. [2021-08-21 18:17:06,415 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1117 transitions. Word has length 49 [2021-08-21 18:17:06,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:17:06,415 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 1117 transitions. [2021-08-21 18:17:06,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 82 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) [2021-08-21 18:17:06,416 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1117 transitions. [2021-08-21 18:17:06,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-21 18:17:06,416 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:17:06,417 INFO L512 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:17:06,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-21 18:17:06,629 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 [2021-08-21 18:17:06,629 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:17:06,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:17:06,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1449888172, now seen corresponding path program 36 times [2021-08-21 18:17:06,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:17:06,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106243759] [2021-08-21 18:17:06,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:17:06,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:17:06,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:17:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:07,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:17:07,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106243759] [2021-08-21 18:17:07,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106243759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:07,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658586925] [2021-08-21 18:17:07,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:17:07,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:07,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:17:07,661 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) [2021-08-21 18:17:07,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 18:17:08,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-08-21 18:17:08,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:17:08,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 18:17:08,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:17:10,978 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:17:10,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-08-21 18:17:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 210 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:10,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658586925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:10,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:17:10,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 86 [2021-08-21 18:17:10,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816931223] [2021-08-21 18:17:10,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-08-21 18:17:10,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:17:10,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-08-21 18:17:10,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1032, Invalid=6450, Unknown=0, NotChecked=0, Total=7482 [2021-08-21 18:17:10,993 INFO L87 Difference]: Start difference. First operand 553 states and 1117 transitions. Second operand has 87 states, 87 states have (on average 1.1149425287356323) internal successors, (97), 86 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) [2021-08-21 18:17:40,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:17:40,735 INFO L93 Difference]: Finished difference Result 6139 states and 11296 transitions. [2021-08-21 18:17:40,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 319 states. [2021-08-21 18:17:40,736 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.1149425287356323) internal successors, (97), 86 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 51 [2021-08-21 18:17:40,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:17:40,748 INFO L225 Difference]: With dead ends: 6139 [2021-08-21 18:17:40,748 INFO L226 Difference]: Without dead ends: 4540 [2021-08-21 18:17:40,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 380 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48420 ImplicationChecksByTransitivity, 30422.1ms TimeCoverageRelationStatistics Valid=24975, Invalid=120567, Unknown=0, NotChecked=0, Total=145542 [2021-08-21 18:17:40,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4540 states. [2021-08-21 18:17:40,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4540 to 601. [2021-08-21 18:17:40,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 600 states have (on average 2.0233333333333334) internal successors, (1214), 600 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:40,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 1214 transitions. [2021-08-21 18:17:40,777 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 1214 transitions. Word has length 51 [2021-08-21 18:17:40,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:17:40,777 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 1214 transitions. [2021-08-21 18:17:40,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.1149425287356323) internal successors, (97), 86 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) [2021-08-21 18:17:40,777 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 1214 transitions. [2021-08-21 18:17:40,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-21 18:17:40,778 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:17:40,779 INFO L512 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:17:40,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 18:17:41,003 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 [2021-08-21 18:17:41,004 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:17:41,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:17:41,004 INFO L82 PathProgramCache]: Analyzing trace with hash 218431460, now seen corresponding path program 37 times [2021-08-21 18:17:41,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:17:41,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80158659] [2021-08-21 18:17:41,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:17:41,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:17:41,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:17:42,131 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:42,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:17:42,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80158659] [2021-08-21 18:17:42,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80158659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:42,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744446001] [2021-08-21 18:17:42,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:17:42,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:42,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:17:42,133 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) [2021-08-21 18:17:42,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 18:17:42,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:17:42,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 91 conjunts are in the unsatisfiable core [2021-08-21 18:17:42,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:17:42,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:17:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:42,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744446001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:42,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:17:42,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2021-08-21 18:17:42,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216281099] [2021-08-21 18:17:42,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-21 18:17:42,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:17:42,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-21 18:17:42,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 18:17:42,999 INFO L87 Difference]: Start difference. First operand 601 states and 1214 transitions. Second operand has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:46,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:17:46,007 INFO L93 Difference]: Finished difference Result 1241 states and 2341 transitions. [2021-08-21 18:17:46,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 18:17:46,008 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-21 18:17:46,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:17:46,011 INFO L225 Difference]: With dead ends: 1241 [2021-08-21 18:17:46,011 INFO L226 Difference]: Without dead ends: 878 [2021-08-21 18:17:46,011 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 3227.6ms TimeCoverageRelationStatistics Valid=1191, Invalid=6999, Unknown=0, NotChecked=0, Total=8190 [2021-08-21 18:17:46,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-08-21 18:17:46,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 100. [2021-08-21 18:17:46,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.9393939393939394) internal successors, (192), 99 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:46,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 192 transitions. [2021-08-21 18:17:46,016 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 192 transitions. Word has length 53 [2021-08-21 18:17:46,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:17:46,016 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 192 transitions. [2021-08-21 18:17:46,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:46,017 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 192 transitions. [2021-08-21 18:17:46,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-21 18:17:46,017 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:17:46,017 INFO L512 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:17:46,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 18:17:46,223 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 [2021-08-21 18:17:46,223 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:17:46,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:17:46,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1795481101, now seen corresponding path program 38 times [2021-08-21 18:17:46,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:17:46,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127292771] [2021-08-21 18:17:46,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:17:46,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:17:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:17:46,568 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:46,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:17:46,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127292771] [2021-08-21 18:17:46,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127292771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:46,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333524055] [2021-08-21 18:17:46,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:17:46,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:46,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:17:46,573 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) [2021-08-21 18:17:46,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 18:17:47,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:17:47,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:17:47,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 18:17:47,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:17:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:47,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333524055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:47,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:17:47,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 25 [2021-08-21 18:17:47,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586813536] [2021-08-21 18:17:47,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:17:47,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:17:47,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:17:47,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:17:47,520 INFO L87 Difference]: Start difference. First operand 100 states and 192 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 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) [2021-08-21 18:17:47,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:17:47,584 INFO L93 Difference]: Finished difference Result 814 states and 1501 transitions. [2021-08-21 18:17:47,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:17:47,585 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 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 54 [2021-08-21 18:17:47,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:17:47,588 INFO L225 Difference]: With dead ends: 814 [2021-08-21 18:17:47,588 INFO L226 Difference]: Without dead ends: 791 [2021-08-21 18:17:47,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 253.2ms TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:17:47,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-08-21 18:17:47,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 676. [2021-08-21 18:17:47,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 2.0207407407407407) internal successors, (1364), 675 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:47,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1364 transitions. [2021-08-21 18:17:47,599 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1364 transitions. Word has length 54 [2021-08-21 18:17:47,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:17:47,599 INFO L470 AbstractCegarLoop]: Abstraction has 676 states and 1364 transitions. [2021-08-21 18:17:47,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 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) [2021-08-21 18:17:47,599 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1364 transitions. [2021-08-21 18:17:47,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-21 18:17:47,600 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:17:47,600 INFO L512 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:17:47,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 18:17:47,824 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 [2021-08-21 18:17:47,825 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:17:47,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:17:47,825 INFO L82 PathProgramCache]: Analyzing trace with hash 387814420, now seen corresponding path program 39 times [2021-08-21 18:17:47,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:17:47,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68687264] [2021-08-21 18:17:47,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:17:47,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:17:47,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:17:48,999 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:49,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:17:49,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68687264] [2021-08-21 18:17:49,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68687264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:49,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992931663] [2021-08-21 18:17:49,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:17:49,000 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:49,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:17:49,001 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) [2021-08-21 18:17:49,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 18:17:49,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-08-21 18:17:49,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:17:49,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 95 conjunts are in the unsatisfiable core [2021-08-21 18:17:49,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:17:49,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:17:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:49,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992931663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:49,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:17:49,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2021-08-21 18:17:49,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042569593] [2021-08-21 18:17:49,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-21 18:17:49,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:17:49,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-21 18:17:49,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 18:17:49,964 INFO L87 Difference]: Start difference. First operand 676 states and 1364 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 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) [2021-08-21 18:17:53,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:17:53,225 INFO L93 Difference]: Finished difference Result 1371 states and 2590 transitions. [2021-08-21 18:17:53,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 18:17:53,225 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 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 55 [2021-08-21 18:17:53,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:17:53,227 INFO L225 Difference]: With dead ends: 1371 [2021-08-21 18:17:53,227 INFO L226 Difference]: Without dead ends: 954 [2021-08-21 18:17:53,228 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 3424.6ms TimeCoverageRelationStatistics Valid=1291, Invalid=7639, Unknown=0, NotChecked=0, Total=8930 [2021-08-21 18:17:53,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-08-21 18:17:53,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 104. [2021-08-21 18:17:53,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.941747572815534) internal successors, (200), 103 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) [2021-08-21 18:17:53,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 200 transitions. [2021-08-21 18:17:53,232 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 200 transitions. Word has length 55 [2021-08-21 18:17:53,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:17:53,233 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 200 transitions. [2021-08-21 18:17:53,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 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) [2021-08-21 18:17:53,233 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 200 transitions. [2021-08-21 18:17:53,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 18:17:53,233 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:17:53,233 INFO L512 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:17:53,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-21 18:17:53,436 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 [2021-08-21 18:17:53,437 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:17:53,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:17:53,437 INFO L82 PathProgramCache]: Analyzing trace with hash -839576637, now seen corresponding path program 40 times [2021-08-21 18:17:53,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:17:53,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52199708] [2021-08-21 18:17:53,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:17:53,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:17:53,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:17:53,823 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:53,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:17:53,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52199708] [2021-08-21 18:17:53,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52199708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:53,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541781278] [2021-08-21 18:17:53,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:17:53,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:53,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:17:53,835 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) [2021-08-21 18:17:53,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 18:17:54,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:17:54,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:17:54,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 18:17:54,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:17:54,794 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:54,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541781278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:54,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:17:54,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 26 [2021-08-21 18:17:54,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756265978] [2021-08-21 18:17:54,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:17:54,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:17:54,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:17:54,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:17:54,795 INFO L87 Difference]: Start difference. First operand 104 states and 200 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:54,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:17:54,863 INFO L93 Difference]: Finished difference Result 873 states and 1614 transitions. [2021-08-21 18:17:54,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:17:54,863 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:17:54,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:17:54,864 INFO L225 Difference]: With dead ends: 873 [2021-08-21 18:17:54,864 INFO L226 Difference]: Without dead ends: 849 [2021-08-21 18:17:54,865 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 271.2ms TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:17:54,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2021-08-21 18:17:54,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 729. [2021-08-21 18:17:54,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 2.0206043956043955) internal successors, (1471), 728 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:54,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 1471 transitions. [2021-08-21 18:17:54,873 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 1471 transitions. Word has length 56 [2021-08-21 18:17:54,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:17:54,874 INFO L470 AbstractCegarLoop]: Abstraction has 729 states and 1471 transitions. [2021-08-21 18:17:54,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:54,874 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 1471 transitions. [2021-08-21 18:17:54,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 18:17:54,875 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:17:54,875 INFO L512 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:17:54,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-21 18:17:55,080 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 [2021-08-21 18:17:55,081 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:17:55,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:17:55,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1363378596, now seen corresponding path program 41 times [2021-08-21 18:17:55,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:17:55,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282910568] [2021-08-21 18:17:55,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:17:55,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:17:55,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:17:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:56,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:17:56,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282910568] [2021-08-21 18:17:56,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282910568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:56,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506326830] [2021-08-21 18:17:56,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:17:56,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:56,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:17:56,397 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) [2021-08-21 18:17:56,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 18:17:57,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-08-21 18:17:57,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:17:57,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-21 18:17:57,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:18:00,711 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:18:00,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-08-21 18:18:00,725 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 276 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:18:00,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506326830] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:00,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:18:00,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2021-08-21 18:18:00,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28355987] [2021-08-21 18:18:00,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-08-21 18:18:00,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:18:00,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-08-21 18:18:00,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1323, Invalid=8379, Unknown=0, NotChecked=0, Total=9702 [2021-08-21 18:18:00,727 INFO L87 Difference]: Start difference. First operand 729 states and 1471 transitions. Second operand has 99 states, 99 states have (on average 1.101010101010101) internal successors, (109), 98 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) [2021-08-21 18:18:46,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:18:46,963 INFO L93 Difference]: Finished difference Result 8516 states and 15803 transitions. [2021-08-21 18:18:46,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 400 states. [2021-08-21 18:18:46,963 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.101010101010101) internal successors, (109), 98 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 57 [2021-08-21 18:18:46,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:18:46,972 INFO L225 Difference]: With dead ends: 8516 [2021-08-21 18:18:46,972 INFO L226 Difference]: Without dead ends: 6449 [2021-08-21 18:18:46,979 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 470 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76712 ImplicationChecksByTransitivity, 46497.8ms TimeCoverageRelationStatistics Valid=37944, Invalid=184368, Unknown=0, NotChecked=0, Total=222312 [2021-08-21 18:18:46,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6449 states. [2021-08-21 18:18:47,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6449 to 757. [2021-08-21 18:18:47,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 2.0224867724867726) internal successors, (1529), 756 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:47,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1529 transitions. [2021-08-21 18:18:47,007 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1529 transitions. Word has length 57 [2021-08-21 18:18:47,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:18:47,007 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 1529 transitions. [2021-08-21 18:18:47,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.101010101010101) internal successors, (109), 98 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) [2021-08-21 18:18:47,007 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1529 transitions. [2021-08-21 18:18:47,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 18:18:47,008 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:18:47,008 INFO L512 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:18:47,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 18:18:47,224 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 [2021-08-21 18:18:47,225 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:18:47,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:18:47,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1040756268, now seen corresponding path program 42 times [2021-08-21 18:18:47,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:18:47,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196904461] [2021-08-21 18:18:47,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:18:47,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:18:47,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:18:48,647 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:18:48,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:18:48,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196904461] [2021-08-21 18:18:48,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196904461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:48,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536938714] [2021-08-21 18:18:48,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:18:48,647 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:18:48,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:18:48,648 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) [2021-08-21 18:18:48,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 18:18:49,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-08-21 18:18:49,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:18:49,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 103 conjunts are in the unsatisfiable core [2021-08-21 18:18:49,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:18:49,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:18:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:18:49,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536938714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:49,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:18:49,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2021-08-21 18:18:49,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122312352] [2021-08-21 18:18:49,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-08-21 18:18:49,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:18:49,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-08-21 18:18:49,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 18:18:49,752 INFO L87 Difference]: Start difference. First operand 757 states and 1529 transitions. Second operand has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:53,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:18:53,693 INFO L93 Difference]: Finished difference Result 1559 states and 2959 transitions. [2021-08-21 18:18:53,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 18:18:53,694 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:18:53,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:18:53,695 INFO L225 Difference]: With dead ends: 1559 [2021-08-21 18:18:53,695 INFO L226 Difference]: Without dead ends: 1109 [2021-08-21 18:18:53,699 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 4226.9ms TimeCoverageRelationStatistics Valid=1503, Invalid=9003, Unknown=0, NotChecked=0, Total=10506 [2021-08-21 18:18:53,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-08-21 18:18:53,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 112. [2021-08-21 18:18:53,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.945945945945946) internal successors, (216), 111 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) [2021-08-21 18:18:53,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 216 transitions. [2021-08-21 18:18:53,704 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 216 transitions. Word has length 59 [2021-08-21 18:18:53,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:18:53,704 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 216 transitions. [2021-08-21 18:18:53,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:53,704 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 216 transitions. [2021-08-21 18:18:53,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-21 18:18:53,705 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:18:53,705 INFO L512 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:18:53,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-21 18:18:53,905 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 [2021-08-21 18:18:53,905 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:18:53,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:18:53,906 INFO L82 PathProgramCache]: Analyzing trace with hash 2119372291, now seen corresponding path program 43 times [2021-08-21 18:18:53,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:18:53,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045126480] [2021-08-21 18:18:53,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:18:53,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:18:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:18:54,331 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:18:54,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:18:54,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045126480] [2021-08-21 18:18:54,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045126480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:54,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068759274] [2021-08-21 18:18:54,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:18:54,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:18:54,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:18:54,337 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) [2021-08-21 18:18:54,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 18:18:55,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:18:55,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-21 18:18:55,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:18:55,559 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:18:55,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068759274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:55,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:18:55,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 28 [2021-08-21 18:18:55,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076160356] [2021-08-21 18:18:55,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 18:18:55,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:18:55,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 18:18:55,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:18:55,560 INFO L87 Difference]: Start difference. First operand 112 states and 216 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 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) [2021-08-21 18:18:55,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:18:55,653 INFO L93 Difference]: Finished difference Result 997 states and 1852 transitions. [2021-08-21 18:18:55,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:18:55,653 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 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 60 [2021-08-21 18:18:55,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:18:55,655 INFO L225 Difference]: With dead ends: 997 [2021-08-21 18:18:55,655 INFO L226 Difference]: Without dead ends: 971 [2021-08-21 18:18:55,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 322.2ms TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:18:55,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-08-21 18:18:55,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 841. [2021-08-21 18:18:55,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 2.020238095238095) internal successors, (1697), 840 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:18:55,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1697 transitions. [2021-08-21 18:18:55,666 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1697 transitions. Word has length 60 [2021-08-21 18:18:55,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:18:55,666 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1697 transitions. [2021-08-21 18:18:55,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 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) [2021-08-21 18:18:55,667 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1697 transitions. [2021-08-21 18:18:55,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 18:18:55,668 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:18:55,668 INFO L512 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:18:55,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 18:18:55,876 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 [2021-08-21 18:18:55,877 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:18:55,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:18:55,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1224367260, now seen corresponding path program 44 times [2021-08-21 18:18:55,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:18:55,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684877842] [2021-08-21 18:18:55,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:18:55,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:18:55,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:18:57,423 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:18:57,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:18:57,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684877842] [2021-08-21 18:18:57,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684877842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:57,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071236428] [2021-08-21 18:18:57,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:18:57,424 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:18:57,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:18:57,425 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) [2021-08-21 18:18:57,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 18:18:58,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:18:58,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:18:58,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 107 conjunts are in the unsatisfiable core [2021-08-21 18:18:58,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:18:58,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:18:58,551 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:18:58,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071236428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:58,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:18:58,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2021-08-21 18:18:58,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79865911] [2021-08-21 18:18:58,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-08-21 18:18:58,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:18:58,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-08-21 18:18:58,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 18:18:58,552 INFO L87 Difference]: Start difference. First operand 841 states and 1697 transitions. Second operand has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 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) [2021-08-21 18:19:02,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:19:02,819 INFO L93 Difference]: Finished difference Result 1704 states and 3238 transitions. [2021-08-21 18:19:02,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-21 18:19:02,820 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 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 61 [2021-08-21 18:19:02,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:19:02,821 INFO L225 Difference]: With dead ends: 1704 [2021-08-21 18:19:02,821 INFO L226 Difference]: Without dead ends: 1194 [2021-08-21 18:19:02,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 4520.5ms TimeCoverageRelationStatistics Valid=1615, Invalid=9727, Unknown=0, NotChecked=0, Total=11342 [2021-08-21 18:19:02,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-08-21 18:19:02,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 116. [2021-08-21 18:19:02,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.9478260869565218) internal successors, (224), 115 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) [2021-08-21 18:19:02,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 224 transitions. [2021-08-21 18:19:02,828 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 224 transitions. Word has length 61 [2021-08-21 18:19:02,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:19:02,828 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 224 transitions. [2021-08-21 18:19:02,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 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) [2021-08-21 18:19:02,829 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 224 transitions. [2021-08-21 18:19:02,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 18:19:02,829 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:19:02,829 INFO L512 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:19:02,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 18:19:03,048 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 [2021-08-21 18:19:03,049 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:19:03,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:19:03,049 INFO L82 PathProgramCache]: Analyzing trace with hash 722398835, now seen corresponding path program 45 times [2021-08-21 18:19:03,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:19:03,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980203866] [2021-08-21 18:19:03,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:19:03,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:19:03,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:19:03,520 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:03,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:19:03,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980203866] [2021-08-21 18:19:03,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980203866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:03,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856077643] [2021-08-21 18:19:03,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:19:03,520 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:19:03,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:19:03,525 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) [2021-08-21 18:19:03,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 18:19:04,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-08-21 18:19:04,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:19:04,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-21 18:19:04,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:19:04,678 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:04,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856077643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:04,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:19:04,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 29 [2021-08-21 18:19:04,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529611951] [2021-08-21 18:19:04,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:19:04,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:19:04,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:19:04,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:19:04,680 INFO L87 Difference]: Start difference. First operand 116 states and 224 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:04,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:19:04,807 INFO L93 Difference]: Finished difference Result 1062 states and 1977 transitions. [2021-08-21 18:19:04,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:19:04,807 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 18:19:04,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:19:04,809 INFO L225 Difference]: With dead ends: 1062 [2021-08-21 18:19:04,809 INFO L226 Difference]: Without dead ends: 1035 [2021-08-21 18:19:04,809 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 356.1ms TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:19:04,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2021-08-21 18:19:04,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 900. [2021-08-21 18:19:04,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 2.020022246941046) internal successors, (1816), 899 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:04,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1816 transitions. [2021-08-21 18:19:04,831 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1816 transitions. Word has length 62 [2021-08-21 18:19:04,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:19:04,831 INFO L470 AbstractCegarLoop]: Abstraction has 900 states and 1816 transitions. [2021-08-21 18:19:04,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:04,832 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1816 transitions. [2021-08-21 18:19:04,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-21 18:19:04,834 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:19:04,834 INFO L512 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:19:04,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-21 18:19:05,048 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 [2021-08-21 18:19:05,049 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:19:05,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:19:05,049 INFO L82 PathProgramCache]: Analyzing trace with hash 24227732, now seen corresponding path program 46 times [2021-08-21 18:19:05,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:19:05,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588644994] [2021-08-21 18:19:05,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:19:05,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:19:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:19:06,639 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:06,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:19:06,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588644994] [2021-08-21 18:19:06,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588644994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:06,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625553679] [2021-08-21 18:19:06,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:19:06,640 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:19:06,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:19:06,640 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) [2021-08-21 18:19:06,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 18:19:07,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:19:07,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:19:07,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 111 conjunts are in the unsatisfiable core [2021-08-21 18:19:07,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:19:07,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:19:07,881 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:07,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625553679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:07,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:19:07,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2021-08-21 18:19:07,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062763750] [2021-08-21 18:19:07,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-08-21 18:19:07,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:19:07,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-08-21 18:19:07,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 18:19:07,882 INFO L87 Difference]: Start difference. First operand 900 states and 1816 transitions. Second operand has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 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) [2021-08-21 18:19:12,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:19:12,489 INFO L93 Difference]: Finished difference Result 1823 states and 3470 transitions. [2021-08-21 18:19:12,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-21 18:19:12,491 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 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 63 [2021-08-21 18:19:12,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:19:12,493 INFO L225 Difference]: With dead ends: 1823 [2021-08-21 18:19:12,494 INFO L226 Difference]: Without dead ends: 1280 [2021-08-21 18:19:12,494 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 4859.7ms TimeCoverageRelationStatistics Valid=1731, Invalid=10479, Unknown=0, NotChecked=0, Total=12210 [2021-08-21 18:19:12,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2021-08-21 18:19:12,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 120. [2021-08-21 18:19:12,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.949579831932773) internal successors, (232), 119 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) [2021-08-21 18:19:12,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 232 transitions. [2021-08-21 18:19:12,501 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 232 transitions. Word has length 63 [2021-08-21 18:19:12,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:19:12,502 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 232 transitions. [2021-08-21 18:19:12,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 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) [2021-08-21 18:19:12,502 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 232 transitions. [2021-08-21 18:19:12,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-08-21 18:19:12,502 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:19:12,502 INFO L512 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:19:12,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-21 18:19:12,716 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 [2021-08-21 18:19:12,717 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:19:12,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:19:12,717 INFO L82 PathProgramCache]: Analyzing trace with hash 774137923, now seen corresponding path program 47 times [2021-08-21 18:19:12,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:19:12,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780418007] [2021-08-21 18:19:12,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:19:12,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:19:12,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:19:13,178 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:13,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:19:13,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780418007] [2021-08-21 18:19:13,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780418007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:13,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887920542] [2021-08-21 18:19:13,178 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:19:13,178 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:19:13,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:19:13,182 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) [2021-08-21 18:19:13,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 18:19:14,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-08-21 18:19:14,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:19:14,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-21 18:19:14,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:19:14,328 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:14,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887920542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:14,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:19:14,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 30 [2021-08-21 18:19:14,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817424786] [2021-08-21 18:19:14,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:19:14,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:19:14,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:19:14,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:19:14,329 INFO L87 Difference]: Start difference. First operand 120 states and 232 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 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) [2021-08-21 18:19:14,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:19:14,414 INFO L93 Difference]: Finished difference Result 1129 states and 2106 transitions. [2021-08-21 18:19:14,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:19:14,415 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 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 64 [2021-08-21 18:19:14,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:19:14,416 INFO L225 Difference]: With dead ends: 1129 [2021-08-21 18:19:14,416 INFO L226 Difference]: Without dead ends: 1101 [2021-08-21 18:19:14,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 351.6ms TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:19:14,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2021-08-21 18:19:14,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 961. [2021-08-21 18:19:14,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 960 states have (on average 2.019791666666667) internal successors, (1939), 960 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:14,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1939 transitions. [2021-08-21 18:19:14,428 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1939 transitions. Word has length 64 [2021-08-21 18:19:14,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:19:14,428 INFO L470 AbstractCegarLoop]: Abstraction has 961 states and 1939 transitions. [2021-08-21 18:19:14,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 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) [2021-08-21 18:19:14,429 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1939 transitions. [2021-08-21 18:19:14,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-21 18:19:14,430 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:19:14,430 INFO L512 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:19:14,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-21 18:19:14,641 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 [2021-08-21 18:19:14,641 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:19:14,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:19:14,642 INFO L82 PathProgramCache]: Analyzing trace with hash -153393884, now seen corresponding path program 48 times [2021-08-21 18:19:14,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:19:14,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747600422] [2021-08-21 18:19:14,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:19:14,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:19:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:19:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:16,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:19:16,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747600422] [2021-08-21 18:19:16,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747600422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:16,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211984329] [2021-08-21 18:19:16,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:19:16,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:19:16,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:19:16,301 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) [2021-08-21 18:19:16,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 18:19:17,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-08-21 18:19:17,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:19:17,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 117 conjunts are in the unsatisfiable core [2021-08-21 18:19:17,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:19:17,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:19:17,592 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:17,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211984329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:17,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:19:17,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2021-08-21 18:19:17,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298070112] [2021-08-21 18:19:17,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-08-21 18:19:17,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:19:17,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-08-21 18:19:17,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 18:19:17,594 INFO L87 Difference]: Start difference. First operand 961 states and 1939 transitions. Second operand has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:22,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:19:22,608 INFO L93 Difference]: Finished difference Result 1946 states and 3710 transitions. [2021-08-21 18:19:22,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-21 18:19:22,608 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-21 18:19:22,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:19:22,611 INFO L225 Difference]: With dead ends: 1946 [2021-08-21 18:19:22,611 INFO L226 Difference]: Without dead ends: 1369 [2021-08-21 18:19:22,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 5271.4ms TimeCoverageRelationStatistics Valid=1851, Invalid=11259, Unknown=0, NotChecked=0, Total=13110 [2021-08-21 18:19:22,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-08-21 18:19:22,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 124. [2021-08-21 18:19:22,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.951219512195122) internal successors, (240), 123 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:22,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 240 transitions. [2021-08-21 18:19:22,619 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 240 transitions. Word has length 65 [2021-08-21 18:19:22,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:19:22,620 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 240 transitions. [2021-08-21 18:19:22,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:22,620 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 240 transitions. [2021-08-21 18:19:22,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-21 18:19:22,620 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:19:22,621 INFO L512 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:19:22,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-21 18:19:22,846 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 [2021-08-21 18:19:22,846 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:19:22,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:19:22,847 INFO L82 PathProgramCache]: Analyzing trace with hash -437164877, now seen corresponding path program 49 times [2021-08-21 18:19:22,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:19:22,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905109766] [2021-08-21 18:19:22,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:19:22,847 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:19:22,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:19:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:23,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:19:23,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905109766] [2021-08-21 18:19:23,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905109766] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:23,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643708728] [2021-08-21 18:19:23,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:19:23,353 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:19:23,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:19:23,354 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) [2021-08-21 18:19:23,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 18:19:24,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:19:24,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 18:19:24,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:19:24,579 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:24,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643708728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:24,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:19:24,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 31 [2021-08-21 18:19:24,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576051281] [2021-08-21 18:19:24,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 18:19:24,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:19:24,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 18:19:24,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:19:24,580 INFO L87 Difference]: Start difference. First operand 124 states and 240 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 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) [2021-08-21 18:19:24,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:19:24,671 INFO L93 Difference]: Finished difference Result 1198 states and 2239 transitions. [2021-08-21 18:19:24,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 18:19:24,672 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 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 66 [2021-08-21 18:19:24,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:19:24,673 INFO L225 Difference]: With dead ends: 1198 [2021-08-21 18:19:24,673 INFO L226 Difference]: Without dead ends: 1169 [2021-08-21 18:19:24,673 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 380.5ms TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:19:24,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-08-21 18:19:24,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 1024. [2021-08-21 18:19:24,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 2.0195503421309873) internal successors, (2066), 1023 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:24,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 2066 transitions. [2021-08-21 18:19:24,683 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 2066 transitions. Word has length 66 [2021-08-21 18:19:24,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:19:24,683 INFO L470 AbstractCegarLoop]: Abstraction has 1024 states and 2066 transitions. [2021-08-21 18:19:24,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 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) [2021-08-21 18:19:24,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 2066 transitions. [2021-08-21 18:19:24,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 18:19:24,684 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:19:24,685 INFO L512 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:19:24,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 18:19:24,900 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 [2021-08-21 18:19:24,901 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:19:24,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:19:24,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1557966164, now seen corresponding path program 50 times [2021-08-21 18:19:24,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:19:24,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398658008] [2021-08-21 18:19:24,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:19:24,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:19:24,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:19:26,896 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:26,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:19:26,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398658008] [2021-08-21 18:19:26,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398658008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:26,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914484885] [2021-08-21 18:19:26,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:19:26,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:19:26,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:19:26,897 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) [2021-08-21 18:19:26,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 18:19:27,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:19:27,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:19:27,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 119 conjunts are in the unsatisfiable core [2021-08-21 18:19:27,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:19:28,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:19:28,238 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:28,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914484885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:28,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:19:28,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2021-08-21 18:19:28,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329118308] [2021-08-21 18:19:28,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-08-21 18:19:28,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:19:28,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-08-21 18:19:28,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 18:19:28,239 INFO L87 Difference]: Start difference. First operand 1024 states and 2066 transitions. Second operand has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 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) [2021-08-21 18:19:33,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:19:33,651 INFO L93 Difference]: Finished difference Result 2073 states and 3958 transitions. [2021-08-21 18:19:33,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-08-21 18:19:33,651 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 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 67 [2021-08-21 18:19:33,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:19:33,653 INFO L225 Difference]: With dead ends: 2073 [2021-08-21 18:19:33,653 INFO L226 Difference]: Without dead ends: 1461 [2021-08-21 18:19:33,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 5908.3ms TimeCoverageRelationStatistics Valid=1975, Invalid=12067, Unknown=0, NotChecked=0, Total=14042 [2021-08-21 18:19:33,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2021-08-21 18:19:33,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 128. [2021-08-21 18:19:33,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.952755905511811) internal successors, (248), 127 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:33,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 248 transitions. [2021-08-21 18:19:33,658 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 248 transitions. Word has length 67 [2021-08-21 18:19:33,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:19:33,658 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 248 transitions. [2021-08-21 18:19:33,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 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) [2021-08-21 18:19:33,658 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 248 transitions. [2021-08-21 18:19:33,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-08-21 18:19:33,659 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:19:33,659 INFO L512 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:19:33,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-21 18:19:33,859 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 [2021-08-21 18:19:33,859 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:19:33,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:19:33,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1075389059, now seen corresponding path program 51 times [2021-08-21 18:19:33,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:19:33,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515685007] [2021-08-21 18:19:33,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:19:33,860 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:19:33,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:19:34,383 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:34,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:19:34,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515685007] [2021-08-21 18:19:34,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515685007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:34,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399457924] [2021-08-21 18:19:34,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:19:34,384 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:19:34,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:19:34,384 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) [2021-08-21 18:19:34,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 18:19:35,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-08-21 18:19:35,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:19:35,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 60 conjunts are in the unsatisfiable core [2021-08-21 18:19:35,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:19:35,672 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:35,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399457924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:35,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:19:35,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 32 [2021-08-21 18:19:35,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350330912] [2021-08-21 18:19:35,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 18:19:35,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:19:35,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 18:19:35,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:19:35,674 INFO L87 Difference]: Start difference. First operand 128 states and 248 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:35,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:19:35,767 INFO L93 Difference]: Finished difference Result 1269 states and 2376 transitions. [2021-08-21 18:19:35,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 18:19:35,768 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-08-21 18:19:35,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:19:35,769 INFO L225 Difference]: With dead ends: 1269 [2021-08-21 18:19:35,769 INFO L226 Difference]: Without dead ends: 1239 [2021-08-21 18:19:35,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 410.5ms TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:19:35,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2021-08-21 18:19:35,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1089. [2021-08-21 18:19:35,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 1088 states have (on average 2.0193014705882355) internal successors, (2197), 1088 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:35,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 2197 transitions. [2021-08-21 18:19:35,780 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 2197 transitions. Word has length 68 [2021-08-21 18:19:35,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:19:35,781 INFO L470 AbstractCegarLoop]: Abstraction has 1089 states and 2197 transitions. [2021-08-21 18:19:35,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:35,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 2197 transitions. [2021-08-21 18:19:35,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-08-21 18:19:35,782 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:19:35,783 INFO L512 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:19:35,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-21 18:19:36,009 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 [2021-08-21 18:19:36,009 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:19:36,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:19:36,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1454061852, now seen corresponding path program 52 times [2021-08-21 18:19:36,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:19:36,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488093488] [2021-08-21 18:19:36,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:19:36,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:19:36,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:19:38,047 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:38,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:19:38,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488093488] [2021-08-21 18:19:38,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488093488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:38,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958302327] [2021-08-21 18:19:38,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:19:38,048 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:19:38,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:19:38,050 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) [2021-08-21 18:19:38,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 18:19:39,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:19:39,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:19:39,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 123 conjunts are in the unsatisfiable core [2021-08-21 18:19:39,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:19:39,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:19:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:39,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958302327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:39,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:19:39,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2021-08-21 18:19:39,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786786634] [2021-08-21 18:19:39,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-08-21 18:19:39,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:19:39,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-08-21 18:19:39,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 18:19:39,512 INFO L87 Difference]: Start difference. First operand 1089 states and 2197 transitions. Second operand has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 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) [2021-08-21 18:19:45,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:19:45,297 INFO L93 Difference]: Finished difference Result 2204 states and 4214 transitions. [2021-08-21 18:19:45,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-21 18:19:45,298 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 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 69 [2021-08-21 18:19:45,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:19:45,300 INFO L225 Difference]: With dead ends: 2204 [2021-08-21 18:19:45,300 INFO L226 Difference]: Without dead ends: 1556 [2021-08-21 18:19:45,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 6231.0ms TimeCoverageRelationStatistics Valid=2103, Invalid=12903, Unknown=0, NotChecked=0, Total=15006 [2021-08-21 18:19:45,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2021-08-21 18:19:45,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 132. [2021-08-21 18:19:45,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.9541984732824427) internal successors, (256), 131 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:45,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 256 transitions. [2021-08-21 18:19:45,308 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 256 transitions. Word has length 69 [2021-08-21 18:19:45,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:19:45,308 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 256 transitions. [2021-08-21 18:19:45,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 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) [2021-08-21 18:19:45,309 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 256 transitions. [2021-08-21 18:19:45,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-21 18:19:45,309 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:19:45,309 INFO L512 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:19:45,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-21 18:19:45,509 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 [2021-08-21 18:19:45,510 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:19:45,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:19:45,510 INFO L82 PathProgramCache]: Analyzing trace with hash -2103166221, now seen corresponding path program 53 times [2021-08-21 18:19:45,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:19:45,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064571684] [2021-08-21 18:19:45,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:19:45,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:19:45,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:19:46,116 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:46,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:19:46,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064571684] [2021-08-21 18:19:46,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064571684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:46,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778886688] [2021-08-21 18:19:46,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:19:46,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:19:46,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:19:46,121 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:19:46,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 18:19:47,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-08-21 18:19:47,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:19:47,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 62 conjunts are in the unsatisfiable core [2021-08-21 18:19:47,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:19:47,484 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:47,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778886688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:47,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:19:47,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 33 [2021-08-21 18:19:47,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409941638] [2021-08-21 18:19:47,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 18:19:47,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:19:47,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 18:19:47,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:19:47,485 INFO L87 Difference]: Start difference. First operand 132 states and 256 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 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) [2021-08-21 18:19:47,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:19:47,584 INFO L93 Difference]: Finished difference Result 1342 states and 2517 transitions. [2021-08-21 18:19:47,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 18:19:47,585 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 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 70 [2021-08-21 18:19:47,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:19:47,586 INFO L225 Difference]: With dead ends: 1342 [2021-08-21 18:19:47,586 INFO L226 Difference]: Without dead ends: 1311 [2021-08-21 18:19:47,587 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 483.6ms TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:19:47,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2021-08-21 18:19:47,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1156. [2021-08-21 18:19:47,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1155 states have (on average 2.019047619047619) internal successors, (2332), 1155 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:47,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 2332 transitions. [2021-08-21 18:19:47,598 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 2332 transitions. Word has length 70 [2021-08-21 18:19:47,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:19:47,598 INFO L470 AbstractCegarLoop]: Abstraction has 1156 states and 2332 transitions. [2021-08-21 18:19:47,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 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) [2021-08-21 18:19:47,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 2332 transitions. [2021-08-21 18:19:47,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-08-21 18:19:47,599 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:19:47,600 INFO L512 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:19:47,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 18:19:47,805 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 [2021-08-21 18:19:47,806 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:19:47,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:19:47,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1954002156, now seen corresponding path program 54 times [2021-08-21 18:19:47,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:19:47,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977074924] [2021-08-21 18:19:47,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:19:47,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:19:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:19:49,983 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:49,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:19:49,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977074924] [2021-08-21 18:19:49,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977074924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:49,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224808525] [2021-08-21 18:19:49,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:19:49,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:19:49,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:19:49,985 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) [2021-08-21 18:19:49,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 18:19:51,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-08-21 18:19:51,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:19:51,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 127 conjunts are in the unsatisfiable core [2021-08-21 18:19:51,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:19:51,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:19:51,507 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:51,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224808525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:51,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:19:51,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2021-08-21 18:19:51,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30999258] [2021-08-21 18:19:51,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-08-21 18:19:51,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:19:51,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-08-21 18:19:51,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2021-08-21 18:19:51,508 INFO L87 Difference]: Start difference. First operand 1156 states and 2332 transitions. Second operand has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:57,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:19:57,739 INFO L93 Difference]: Finished difference Result 2339 states and 4478 transitions. [2021-08-21 18:19:57,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-21 18:19:57,739 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-08-21 18:19:57,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:19:57,741 INFO L225 Difference]: With dead ends: 2339 [2021-08-21 18:19:57,741 INFO L226 Difference]: Without dead ends: 1654 [2021-08-21 18:19:57,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 6710.7ms TimeCoverageRelationStatistics Valid=2235, Invalid=13767, Unknown=0, NotChecked=0, Total=16002 [2021-08-21 18:19:57,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2021-08-21 18:19:57,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 136. [2021-08-21 18:19:57,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.9555555555555555) internal successors, (264), 135 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:57,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 264 transitions. [2021-08-21 18:19:57,748 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 264 transitions. Word has length 71 [2021-08-21 18:19:57,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:19:57,749 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 264 transitions. [2021-08-21 18:19:57,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:57,749 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 264 transitions. [2021-08-21 18:19:57,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 18:19:57,749 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:19:57,749 INFO L512 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:19:57,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-21 18:19:57,949 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 [2021-08-21 18:19:57,950 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:19:57,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:19:57,950 INFO L82 PathProgramCache]: Analyzing trace with hash -421446461, now seen corresponding path program 55 times [2021-08-21 18:19:57,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:19:57,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268573713] [2021-08-21 18:19:57,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:19:57,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:19:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:19:58,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:58,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:19:58,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268573713] [2021-08-21 18:19:58,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268573713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:58,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831102416] [2021-08-21 18:19:58,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:19:58,525 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:19:58,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:19:58,526 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) [2021-08-21 18:19:58,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 18:19:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:19:59,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 64 conjunts are in the unsatisfiable core [2021-08-21 18:19:59,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:19:59,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:59,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831102416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:59,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:19:59,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 34 [2021-08-21 18:19:59,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420039163] [2021-08-21 18:19:59,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 18:19:59,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:19:59,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 18:19:59,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 18:19:59,941 INFO L87 Difference]: Start difference. First operand 136 states and 264 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:00,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:00,044 INFO L93 Difference]: Finished difference Result 1417 states and 2662 transitions. [2021-08-21 18:20:00,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 18:20:00,044 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 18:20:00,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:00,046 INFO L225 Difference]: With dead ends: 1417 [2021-08-21 18:20:00,046 INFO L226 Difference]: Without dead ends: 1385 [2021-08-21 18:20:00,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 454.0ms TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 18:20:00,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2021-08-21 18:20:00,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1225. [2021-08-21 18:20:00,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1225 states, 1224 states have (on average 2.0187908496732025) internal successors, (2471), 1224 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:00,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 2471 transitions. [2021-08-21 18:20:00,060 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 2471 transitions. Word has length 72 [2021-08-21 18:20:00,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:00,060 INFO L470 AbstractCegarLoop]: Abstraction has 1225 states and 2471 transitions. [2021-08-21 18:20:00,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:00,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 2471 transitions. [2021-08-21 18:20:00,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-08-21 18:20:00,062 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:00,062 INFO L512 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:00,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-21 18:20:00,265 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 [2021-08-21 18:20:00,265 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:00,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:00,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1191299236, now seen corresponding path program 56 times [2021-08-21 18:20:00,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:00,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806733428] [2021-08-21 18:20:00,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:00,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:00,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:02,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:02,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:02,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806733428] [2021-08-21 18:20:02,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806733428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:02,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840548833] [2021-08-21 18:20:02,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:20:02,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:02,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:02,434 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) [2021-08-21 18:20:02,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 18:20:03,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:20:03,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:03,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 131 conjunts are in the unsatisfiable core [2021-08-21 18:20:03,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:04,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:20:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:04,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840548833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:04,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:04,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2021-08-21 18:20:04,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576993392] [2021-08-21 18:20:04,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-08-21 18:20:04,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:04,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-08-21 18:20:04,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 18:20:04,053 INFO L87 Difference]: Start difference. First operand 1225 states and 2471 transitions. Second operand has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 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) [2021-08-21 18:20:10,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:10,882 INFO L93 Difference]: Finished difference Result 2478 states and 4750 transitions. [2021-08-21 18:20:10,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-21 18:20:10,882 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 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 73 [2021-08-21 18:20:10,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:10,885 INFO L225 Difference]: With dead ends: 2478 [2021-08-21 18:20:10,885 INFO L226 Difference]: Without dead ends: 1755 [2021-08-21 18:20:10,886 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 7188.2ms TimeCoverageRelationStatistics Valid=2371, Invalid=14659, Unknown=0, NotChecked=0, Total=17030 [2021-08-21 18:20:10,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1755 states. [2021-08-21 18:20:10,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1755 to 140. [2021-08-21 18:20:10,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.9568345323741008) internal successors, (272), 139 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:10,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 272 transitions. [2021-08-21 18:20:10,893 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 272 transitions. Word has length 73 [2021-08-21 18:20:10,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:10,893 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 272 transitions. [2021-08-21 18:20:10,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 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) [2021-08-21 18:20:10,893 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 272 transitions. [2021-08-21 18:20:10,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-08-21 18:20:10,894 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:10,894 INFO L512 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:10,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-21 18:20:11,094 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 [2021-08-21 18:20:11,094 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:11,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:11,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1701351117, now seen corresponding path program 57 times [2021-08-21 18:20:11,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:11,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774589113] [2021-08-21 18:20:11,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:11,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:11,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:11,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:11,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:11,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774589113] [2021-08-21 18:20:11,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774589113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:11,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658217364] [2021-08-21 18:20:11,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:20:11,726 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:11,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:11,727 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) [2021-08-21 18:20:11,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 18:20:13,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-08-21 18:20:13,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:13,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-21 18:20:13,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:13,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658217364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:13,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:13,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 35 [2021-08-21 18:20:13,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892585501] [2021-08-21 18:20:13,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 18:20:13,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:13,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 18:20:13,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:20:13,229 INFO L87 Difference]: Start difference. First operand 140 states and 272 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:13,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:13,337 INFO L93 Difference]: Finished difference Result 1494 states and 2811 transitions. [2021-08-21 18:20:13,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:20:13,337 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:20:13,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:13,338 INFO L225 Difference]: With dead ends: 1494 [2021-08-21 18:20:13,338 INFO L226 Difference]: Without dead ends: 1461 [2021-08-21 18:20:13,339 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 480.4ms TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:20:13,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2021-08-21 18:20:13,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1296. [2021-08-21 18:20:13,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 2.0185328185328184) internal successors, (2614), 1295 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:13,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 2614 transitions. [2021-08-21 18:20:13,349 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 2614 transitions. Word has length 74 [2021-08-21 18:20:13,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:13,350 INFO L470 AbstractCegarLoop]: Abstraction has 1296 states and 2614 transitions. [2021-08-21 18:20:13,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:13,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 2614 transitions. [2021-08-21 18:20:13,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 18:20:13,351 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:13,351 INFO L512 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:13,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-21 18:20:13,551 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 [2021-08-21 18:20:13,551 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:13,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:13,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1959037140, now seen corresponding path program 58 times [2021-08-21 18:20:13,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:13,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163703513] [2021-08-21 18:20:13,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:13,552 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:15,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:15,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:15,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163703513] [2021-08-21 18:20:15,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163703513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:15,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111942931] [2021-08-21 18:20:15,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:20:15,840 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:15,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:15,841 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) [2021-08-21 18:20:15,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 18:20:17,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:20:17,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:17,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 135 conjunts are in the unsatisfiable core [2021-08-21 18:20:17,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:17,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:20:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:17,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111942931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:17,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:17,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2021-08-21 18:20:17,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401034056] [2021-08-21 18:20:17,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-08-21 18:20:17,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:17,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-08-21 18:20:17,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2021-08-21 18:20:17,526 INFO L87 Difference]: Start difference. First operand 1296 states and 2614 transitions. Second operand has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 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) [2021-08-21 18:20:24,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:24,762 INFO L93 Difference]: Finished difference Result 2621 states and 5030 transitions. [2021-08-21 18:20:24,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-21 18:20:24,762 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 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 75 [2021-08-21 18:20:24,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:24,764 INFO L225 Difference]: With dead ends: 2621 [2021-08-21 18:20:24,765 INFO L226 Difference]: Without dead ends: 1859 [2021-08-21 18:20:24,766 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 7620.7ms TimeCoverageRelationStatistics Valid=2511, Invalid=15579, Unknown=0, NotChecked=0, Total=18090 [2021-08-21 18:20:24,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2021-08-21 18:20:24,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 144. [2021-08-21 18:20:24,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.9580419580419581) internal successors, (280), 143 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:24,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 280 transitions. [2021-08-21 18:20:24,772 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 280 transitions. Word has length 75 [2021-08-21 18:20:24,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:24,772 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 280 transitions. [2021-08-21 18:20:24,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 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) [2021-08-21 18:20:24,772 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 280 transitions. [2021-08-21 18:20:24,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 18:20:24,772 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:24,772 INFO L512 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:24,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-21 18:20:24,988 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 [2021-08-21 18:20:24,989 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:24,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:24,989 INFO L82 PathProgramCache]: Analyzing trace with hash 623687427, now seen corresponding path program 59 times [2021-08-21 18:20:24,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:24,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833548884] [2021-08-21 18:20:24,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:24,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:25,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:25,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:25,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833548884] [2021-08-21 18:20:25,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833548884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:25,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611424555] [2021-08-21 18:20:25,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:20:25,600 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:25,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:25,601 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) [2021-08-21 18:20:25,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 18:20:26,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-08-21 18:20:26,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:26,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 68 conjunts are in the unsatisfiable core [2021-08-21 18:20:27,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:27,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611424555] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:27,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:27,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 36 [2021-08-21 18:20:27,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096082817] [2021-08-21 18:20:27,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 18:20:27,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:27,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 18:20:27,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:20:27,210 INFO L87 Difference]: Start difference. First operand 144 states and 280 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:27,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:27,324 INFO L93 Difference]: Finished difference Result 1573 states and 2964 transitions. [2021-08-21 18:20:27,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 18:20:27,325 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:20:27,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:27,326 INFO L225 Difference]: With dead ends: 1573 [2021-08-21 18:20:27,327 INFO L226 Difference]: Without dead ends: 1539 [2021-08-21 18:20:27,327 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 487.8ms TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:20:27,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2021-08-21 18:20:27,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1369. [2021-08-21 18:20:27,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1368 states have (on average 2.0182748538011697) internal successors, (2761), 1368 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:27,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2761 transitions. [2021-08-21 18:20:27,339 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2761 transitions. Word has length 76 [2021-08-21 18:20:27,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:27,339 INFO L470 AbstractCegarLoop]: Abstraction has 1369 states and 2761 transitions. [2021-08-21 18:20:27,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:27,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2761 transitions. [2021-08-21 18:20:27,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-08-21 18:20:27,341 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:27,341 INFO L512 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:27,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 18:20:27,554 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 [2021-08-21 18:20:27,554 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:27,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:27,555 INFO L82 PathProgramCache]: Analyzing trace with hash 678586980, now seen corresponding path program 60 times [2021-08-21 18:20:27,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:27,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285513127] [2021-08-21 18:20:27,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:27,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:27,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:30,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:30,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:30,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285513127] [2021-08-21 18:20:30,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285513127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:30,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609882597] [2021-08-21 18:20:30,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:20:30,167 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:30,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:30,167 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) [2021-08-21 18:20:30,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 18:20:31,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-08-21 18:20:31,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:31,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 141 conjunts are in the unsatisfiable core [2021-08-21 18:20:31,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:31,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:20:31,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:31,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609882597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:31,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:31,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2021-08-21 18:20:31,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311141539] [2021-08-21 18:20:31,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-08-21 18:20:31,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:31,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-08-21 18:20:31,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2021-08-21 18:20:31,970 INFO L87 Difference]: Start difference. First operand 1369 states and 2761 transitions. Second operand has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:39,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:39,713 INFO L93 Difference]: Finished difference Result 2768 states and 5318 transitions. [2021-08-21 18:20:39,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-08-21 18:20:39,718 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:20:39,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:39,720 INFO L225 Difference]: With dead ends: 2768 [2021-08-21 18:20:39,720 INFO L226 Difference]: Without dead ends: 1966 [2021-08-21 18:20:39,720 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 8329.3ms TimeCoverageRelationStatistics Valid=2655, Invalid=16527, Unknown=0, NotChecked=0, Total=19182 [2021-08-21 18:20:39,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2021-08-21 18:20:39,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 148. [2021-08-21 18:20:39,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.9591836734693877) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:39,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 288 transitions. [2021-08-21 18:20:39,727 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 288 transitions. Word has length 77 [2021-08-21 18:20:39,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:39,727 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 288 transitions. [2021-08-21 18:20:39,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:39,727 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 288 transitions. [2021-08-21 18:20:39,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-08-21 18:20:39,728 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:39,728 INFO L512 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:39,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-21 18:20:39,928 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 [2021-08-21 18:20:39,928 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:39,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:39,929 INFO L82 PathProgramCache]: Analyzing trace with hash -415561869, now seen corresponding path program 61 times [2021-08-21 18:20:39,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:39,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685251078] [2021-08-21 18:20:39,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:39,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:40,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:40,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:40,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685251078] [2021-08-21 18:20:40,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685251078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:40,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054494003] [2021-08-21 18:20:40,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:20:40,575 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:40,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:40,576 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) [2021-08-21 18:20:40,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 18:20:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:42,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 70 conjunts are in the unsatisfiable core [2021-08-21 18:20:42,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:42,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:42,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054494003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:42,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:42,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 37 [2021-08-21 18:20:42,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87649931] [2021-08-21 18:20:42,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-21 18:20:42,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:42,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-21 18:20:42,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:20:42,269 INFO L87 Difference]: Start difference. First operand 148 states and 288 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 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) [2021-08-21 18:20:42,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:42,409 INFO L93 Difference]: Finished difference Result 1654 states and 3121 transitions. [2021-08-21 18:20:42,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 18:20:42,410 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 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 78 [2021-08-21 18:20:42,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:42,411 INFO L225 Difference]: With dead ends: 1654 [2021-08-21 18:20:42,411 INFO L226 Difference]: Without dead ends: 1619 [2021-08-21 18:20:42,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 517.5ms TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:20:42,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2021-08-21 18:20:42,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1444. [2021-08-21 18:20:42,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 2.018018018018018) internal successors, (2912), 1443 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:42,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 2912 transitions. [2021-08-21 18:20:42,425 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 2912 transitions. Word has length 78 [2021-08-21 18:20:42,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:42,425 INFO L470 AbstractCegarLoop]: Abstraction has 1444 states and 2912 transitions. [2021-08-21 18:20:42,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 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) [2021-08-21 18:20:42,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 2912 transitions. [2021-08-21 18:20:42,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-08-21 18:20:42,427 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:42,427 INFO L512 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:42,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-21 18:20:42,652 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 [2021-08-21 18:20:42,653 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:42,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:42,653 INFO L82 PathProgramCache]: Analyzing trace with hash 803301012, now seen corresponding path program 62 times [2021-08-21 18:20:42,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:42,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729336767] [2021-08-21 18:20:42,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:42,654 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:42,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:45,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:45,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:45,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729336767] [2021-08-21 18:20:45,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729336767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:45,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109754000] [2021-08-21 18:20:45,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:20:45,199 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:45,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:45,200 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) [2021-08-21 18:20:45,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 18:20:46,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:20:46,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:46,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 143 conjunts are in the unsatisfiable core [2021-08-21 18:20:46,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:47,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:20:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:47,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109754000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:47,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:47,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2021-08-21 18:20:47,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182395618] [2021-08-21 18:20:47,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-08-21 18:20:47,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:47,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-08-21 18:20:47,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 18:20:47,101 INFO L87 Difference]: Start difference. First operand 1444 states and 2912 transitions. Second operand has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:55,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:55,431 INFO L93 Difference]: Finished difference Result 2919 states and 5614 transitions. [2021-08-21 18:20:55,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-21 18:20:55,432 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:20:55,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:55,435 INFO L225 Difference]: With dead ends: 2919 [2021-08-21 18:20:55,435 INFO L226 Difference]: Without dead ends: 2076 [2021-08-21 18:20:55,437 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 8748.0ms TimeCoverageRelationStatistics Valid=2803, Invalid=17503, Unknown=0, NotChecked=0, Total=20306 [2021-08-21 18:20:55,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2021-08-21 18:20:55,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 152. [2021-08-21 18:20:55,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.9602649006622517) internal successors, (296), 151 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:55,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 296 transitions. [2021-08-21 18:20:55,448 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 296 transitions. Word has length 79 [2021-08-21 18:20:55,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:55,448 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 296 transitions. [2021-08-21 18:20:55,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:55,448 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 296 transitions. [2021-08-21 18:20:55,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-21 18:20:55,448 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:55,449 INFO L512 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:55,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-21 18:20:55,676 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 [2021-08-21 18:20:55,676 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:55,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:55,677 INFO L82 PathProgramCache]: Analyzing trace with hash -844394173, now seen corresponding path program 63 times [2021-08-21 18:20:55,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:55,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926050706] [2021-08-21 18:20:55,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:55,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:56,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:56,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:56,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926050706] [2021-08-21 18:20:56,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926050706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:56,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581071293] [2021-08-21 18:20:56,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:20:56,372 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:56,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:56,374 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) [2021-08-21 18:20:56,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 18:20:57,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-08-21 18:20:57,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:57,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 72 conjunts are in the unsatisfiable core [2021-08-21 18:20:57,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:58,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:58,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581071293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:58,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:58,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 38 [2021-08-21 18:20:58,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054464893] [2021-08-21 18:20:58,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 18:20:58,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:58,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 18:20:58,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 18:20:58,215 INFO L87 Difference]: Start difference. First operand 152 states and 296 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:58,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:58,364 INFO L93 Difference]: Finished difference Result 1737 states and 3282 transitions. [2021-08-21 18:20:58,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 18:20:58,365 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:20:58,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:58,367 INFO L225 Difference]: With dead ends: 1737 [2021-08-21 18:20:58,367 INFO L226 Difference]: Without dead ends: 1701 [2021-08-21 18:20:58,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 547.4ms TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 18:20:58,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2021-08-21 18:20:58,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1521. [2021-08-21 18:20:58,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 2.017763157894737) internal successors, (3067), 1520 states have internal predecessors, (3067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:58,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 3067 transitions. [2021-08-21 18:20:58,380 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 3067 transitions. Word has length 80 [2021-08-21 18:20:58,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:58,380 INFO L470 AbstractCegarLoop]: Abstraction has 1521 states and 3067 transitions. [2021-08-21 18:20:58,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:58,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 3067 transitions. [2021-08-21 18:20:58,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-08-21 18:20:58,382 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:58,382 INFO L512 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:58,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-21 18:20:58,599 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 [2021-08-21 18:20:58,599 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:58,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:58,599 INFO L82 PathProgramCache]: Analyzing trace with hash -2043237340, now seen corresponding path program 64 times [2021-08-21 18:20:58,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:58,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734011428] [2021-08-21 18:20:58,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:58,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:58,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:01,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:01,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:01,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734011428] [2021-08-21 18:21:01,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734011428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:01,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772097152] [2021-08-21 18:21:01,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:21:01,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:01,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:01,234 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) [2021-08-21 18:21:01,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 18:21:02,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:21:02,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:02,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 147 conjunts are in the unsatisfiable core [2021-08-21 18:21:02,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:03,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:21:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:03,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772097152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:03,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:03,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2021-08-21 18:21:03,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097335363] [2021-08-21 18:21:03,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-08-21 18:21:03,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:03,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-08-21 18:21:03,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 18:21:03,186 INFO L87 Difference]: Start difference. First operand 1521 states and 3067 transitions. Second operand has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 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) [2021-08-21 18:21:12,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:12,002 INFO L93 Difference]: Finished difference Result 3074 states and 5918 transitions. [2021-08-21 18:21:12,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-08-21 18:21:12,003 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 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 81 [2021-08-21 18:21:12,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:12,005 INFO L225 Difference]: With dead ends: 3074 [2021-08-21 18:21:12,005 INFO L226 Difference]: Without dead ends: 2189 [2021-08-21 18:21:12,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 9225.3ms TimeCoverageRelationStatistics Valid=2955, Invalid=18507, Unknown=0, NotChecked=0, Total=21462 [2021-08-21 18:21:12,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2021-08-21 18:21:12,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 156. [2021-08-21 18:21:12,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.961290322580645) internal successors, (304), 155 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) [2021-08-21 18:21:12,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 304 transitions. [2021-08-21 18:21:12,014 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 304 transitions. Word has length 81 [2021-08-21 18:21:12,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:12,014 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 304 transitions. [2021-08-21 18:21:12,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 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) [2021-08-21 18:21:12,014 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 304 transitions. [2021-08-21 18:21:12,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-08-21 18:21:12,014 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:12,014 INFO L512 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:12,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-21 18:21:12,215 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 [2021-08-21 18:21:12,215 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:21:12,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:12,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1107230131, now seen corresponding path program 65 times [2021-08-21 18:21:12,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:12,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527255773] [2021-08-21 18:21:12,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:12,216 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:12,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:13,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:13,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:13,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527255773] [2021-08-21 18:21:13,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527255773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:13,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855234819] [2021-08-21 18:21:13,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:21:13,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:13,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:13,001 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) [2021-08-21 18:21:13,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 18:21:14,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-08-21 18:21:14,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:14,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 74 conjunts are in the unsatisfiable core [2021-08-21 18:21:14,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:14,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:14,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855234819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:14,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:14,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 39 [2021-08-21 18:21:14,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882469012] [2021-08-21 18:21:14,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:21:14,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:14,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:21:14,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:21:14,886 INFO L87 Difference]: Start difference. First operand 156 states and 304 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 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) [2021-08-21 18:21:15,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:15,020 INFO L93 Difference]: Finished difference Result 1822 states and 3447 transitions. [2021-08-21 18:21:15,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:21:15,020 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 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 82 [2021-08-21 18:21:15,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:15,022 INFO L225 Difference]: With dead ends: 1822 [2021-08-21 18:21:15,022 INFO L226 Difference]: Without dead ends: 1785 [2021-08-21 18:21:15,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 636.3ms TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:21:15,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2021-08-21 18:21:15,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1600. [2021-08-21 18:21:15,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 2.017510944340213) internal successors, (3226), 1599 states have internal predecessors, (3226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:15,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 3226 transitions. [2021-08-21 18:21:15,036 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 3226 transitions. Word has length 82 [2021-08-21 18:21:15,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:15,036 INFO L470 AbstractCegarLoop]: Abstraction has 1600 states and 3226 transitions. [2021-08-21 18:21:15,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 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) [2021-08-21 18:21:15,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 3226 transitions. [2021-08-21 18:21:15,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-08-21 18:21:15,037 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:15,037 INFO L512 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:15,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-21 18:21:15,237 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 [2021-08-21 18:21:15,238 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:21:15,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:15,238 INFO L82 PathProgramCache]: Analyzing trace with hash 70181972, now seen corresponding path program 66 times [2021-08-21 18:21:15,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:15,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318219890] [2021-08-21 18:21:15,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:15,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:15,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:17,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:17,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:17,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318219890] [2021-08-21 18:21:17,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318219890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:17,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748798728] [2021-08-21 18:21:17,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:21:17,996 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:17,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:17,996 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) [2021-08-21 18:21:17,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 18:21:19,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-08-21 18:21:19,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:19,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 80 conjunts are in the unsatisfiable core [2021-08-21 18:21:19,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:27,422 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:21:27,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-08-21 18:21:27,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 666 proven. 740 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:27,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748798728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:27,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:27,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 150 [2021-08-21 18:21:27,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975889701] [2021-08-21 18:21:27,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2021-08-21 18:21:27,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:27,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2021-08-21 18:21:27,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3000, Invalid=19650, Unknown=0, NotChecked=0, Total=22650 [2021-08-21 18:21:27,437 INFO L87 Difference]: Start difference. First operand 1600 states and 3226 transitions. Second operand has 151 states, 151 states have (on average 1.0662251655629138) internal successors, (161), 150 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:04,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:25:04,247 INFO L93 Difference]: Finished difference Result 25546 states and 48485 transitions. [2021-08-21 18:25:04,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 855 states. [2021-08-21 18:25:04,249 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 1.0662251655629138) internal successors, (161), 150 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-08-21 18:25:04,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:25:04,293 INFO L225 Difference]: With dead ends: 25546 [2021-08-21 18:25:04,293 INFO L226 Difference]: Without dead ends: 20918 [2021-08-21 18:25:04,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 973 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 964 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356620 ImplicationChecksByTransitivity, 209122.6ms TimeCoverageRelationStatistics Valid=157219, Invalid=774971, Unknown=0, NotChecked=0, Total=932190 [2021-08-21 18:25:04,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20918 states. [2021-08-21 18:25:04,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20918 to 1641. [2021-08-21 18:25:04,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1640 states have (on average 2.018292682926829) internal successors, (3310), 1640 states have internal predecessors, (3310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:04,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 3310 transitions. [2021-08-21 18:25:04,486 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 3310 transitions. Word has length 83 [2021-08-21 18:25:04,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:25:04,486 INFO L470 AbstractCegarLoop]: Abstraction has 1641 states and 3310 transitions. [2021-08-21 18:25:04,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 1.0662251655629138) internal successors, (161), 150 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:04,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 3310 transitions. [2021-08-21 18:25:04,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-21 18:25:04,488 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:25:04,488 INFO L512 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:25:04,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-21 18:25:04,712 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 [2021-08-21 18:25:04,713 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:25:04,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:25:04,713 INFO L82 PathProgramCache]: Analyzing trace with hash 2027851236, now seen corresponding path program 67 times [2021-08-21 18:25:04,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:25:04,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529828988] [2021-08-21 18:25:04,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:25:04,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:25:04,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:25:07,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:07,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:25:07,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529828988] [2021-08-21 18:25:07,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529828988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:07,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076751874] [2021-08-21 18:25:07,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:25:07,891 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:25:07,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:25:07,917 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) [2021-08-21 18:25:07,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 18:25:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:25:09,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 155 conjunts are in the unsatisfiable core [2021-08-21 18:25:09,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:25:10,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:25:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:10,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076751874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:10,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:25:10,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2021-08-21 18:25:10,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013382439] [2021-08-21 18:25:10,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-08-21 18:25:10,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:25:10,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-08-21 18:25:10,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2021-08-21 18:25:10,158 INFO L87 Difference]: Start difference. First operand 1641 states and 3310 transitions. Second operand has 79 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 78 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) [2021-08-21 18:25:20,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:25:20,515 INFO L93 Difference]: Finished difference Result 3353 states and 6469 transitions. [2021-08-21 18:25:20,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-08-21 18:25:20,516 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 78 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 85 [2021-08-21 18:25:20,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:25:20,519 INFO L225 Difference]: With dead ends: 3353 [2021-08-21 18:25:20,519 INFO L226 Difference]: Without dead ends: 2422 [2021-08-21 18:25:20,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 10958.2ms TimeCoverageRelationStatistics Valid=3271, Invalid=20599, Unknown=0, NotChecked=0, Total=23870 [2021-08-21 18:25:20,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2021-08-21 18:25:20,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 164. [2021-08-21 18:25:20,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.9631901840490797) internal successors, (320), 163 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) [2021-08-21 18:25:20,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 320 transitions. [2021-08-21 18:25:20,528 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 320 transitions. Word has length 85 [2021-08-21 18:25:20,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:25:20,528 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 320 transitions. [2021-08-21 18:25:20,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 78 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) [2021-08-21 18:25:20,528 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 320 transitions. [2021-08-21 18:25:20,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-08-21 18:25:20,528 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:25:20,528 INFO L512 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:25:20,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-21 18:25:20,729 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 [2021-08-21 18:25:20,729 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:25:20,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:25:20,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1538042893, now seen corresponding path program 68 times [2021-08-21 18:25:20,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:25:20,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896570828] [2021-08-21 18:25:20,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:25:20,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:25:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:25:21,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:21,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:25:21,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896570828] [2021-08-21 18:25:21,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896570828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:21,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813604147] [2021-08-21 18:25:21,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:25:21,558 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:25:21,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:25:21,562 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) [2021-08-21 18:25:21,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 18:25:23,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:25:23,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:25:23,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 78 conjunts are in the unsatisfiable core [2021-08-21 18:25:23,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:25:23,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:23,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813604147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:23,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:25:23,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 41 [2021-08-21 18:25:23,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940195223] [2021-08-21 18:25:23,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-21 18:25:23,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:25:23,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-21 18:25:23,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:25:23,637 INFO L87 Difference]: Start difference. First operand 164 states and 320 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:23,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:25:23,817 INFO L93 Difference]: Finished difference Result 1998 states and 3789 transitions. [2021-08-21 18:25:23,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 18:25:23,817 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-08-21 18:25:23,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:25:23,819 INFO L225 Difference]: With dead ends: 1998 [2021-08-21 18:25:23,819 INFO L226 Difference]: Without dead ends: 1959 [2021-08-21 18:25:23,820 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 677.6ms TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:25:23,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-08-21 18:25:23,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1764. [2021-08-21 18:25:23,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 2.01701644923426) internal successors, (3556), 1763 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:23,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 3556 transitions. [2021-08-21 18:25:23,841 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 3556 transitions. Word has length 86 [2021-08-21 18:25:23,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:25:23,842 INFO L470 AbstractCegarLoop]: Abstraction has 1764 states and 3556 transitions. [2021-08-21 18:25:23,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:23,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 3556 transitions. [2021-08-21 18:25:23,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-08-21 18:25:23,844 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:25:23,844 INFO L512 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:25:23,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-21 18:25:24,056 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 [2021-08-21 18:25:24,057 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:25:24,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:25:24,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1761411604, now seen corresponding path program 69 times [2021-08-21 18:25:24,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:25:24,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823614134] [2021-08-21 18:25:24,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:25:24,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:25:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:25:27,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:27,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:25:27,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823614134] [2021-08-21 18:25:27,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823614134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:27,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096830740] [2021-08-21 18:25:27,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:25:27,199 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:25:27,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:25:27,199 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) [2021-08-21 18:25:27,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-21 18:25:29,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-08-21 18:25:29,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:25:29,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 159 conjunts are in the unsatisfiable core [2021-08-21 18:25:29,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:25:29,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:25:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:29,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096830740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:29,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:25:29,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2021-08-21 18:25:29,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692737469] [2021-08-21 18:25:29,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-08-21 18:25:29,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:25:29,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-08-21 18:25:29,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2021-08-21 18:25:29,520 INFO L87 Difference]: Start difference. First operand 1764 states and 3556 transitions. Second operand has 81 states, 81 states have (on average 1.0740740740740742) internal successors, (87), 80 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) [2021-08-21 18:25:40,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:25:40,475 INFO L93 Difference]: Finished difference Result 3563 states and 6878 transitions. [2021-08-21 18:25:40,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-08-21 18:25:40,475 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.0740740740740742) internal successors, (87), 80 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 87 [2021-08-21 18:25:40,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:25:40,478 INFO L225 Difference]: With dead ends: 3563 [2021-08-21 18:25:40,478 INFO L226 Difference]: Without dead ends: 2546 [2021-08-21 18:25:40,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3003 ImplicationChecksByTransitivity, 11351.0ms TimeCoverageRelationStatistics Valid=3435, Invalid=21687, Unknown=0, NotChecked=0, Total=25122 [2021-08-21 18:25:40,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2546 states. [2021-08-21 18:25:40,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2546 to 168. [2021-08-21 18:25:40,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.964071856287425) internal successors, (328), 167 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:40,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 328 transitions. [2021-08-21 18:25:40,487 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 328 transitions. Word has length 87 [2021-08-21 18:25:40,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:25:40,487 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 328 transitions. [2021-08-21 18:25:40,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.0740740740740742) internal successors, (87), 80 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) [2021-08-21 18:25:40,487 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 328 transitions. [2021-08-21 18:25:40,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-08-21 18:25:40,488 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:25:40,488 INFO L512 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:25:40,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-21 18:25:40,691 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 [2021-08-21 18:25:40,691 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:25:40,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:25:40,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1207736893, now seen corresponding path program 70 times [2021-08-21 18:25:40,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:25:40,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035142758] [2021-08-21 18:25:40,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:25:40,692 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:25:40,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:25:41,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:41,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:25:41,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035142758] [2021-08-21 18:25:41,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035142758] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:41,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114062996] [2021-08-21 18:25:41,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:25:41,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:25:41,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:25:41,509 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) [2021-08-21 18:25:41,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-21 18:25:43,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:25:43,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:25:43,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 80 conjunts are in the unsatisfiable core [2021-08-21 18:25:43,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:25:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:43,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114062996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:43,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:25:43,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 42 [2021-08-21 18:25:43,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554648922] [2021-08-21 18:25:43,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 18:25:43,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:25:43,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 18:25:43,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 18:25:43,637 INFO L87 Difference]: Start difference. First operand 168 states and 328 transitions. Second operand has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 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) [2021-08-21 18:25:43,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:25:43,787 INFO L93 Difference]: Finished difference Result 2089 states and 3966 transitions. [2021-08-21 18:25:43,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 18:25:43,787 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 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 88 [2021-08-21 18:25:43,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:25:43,789 INFO L225 Difference]: With dead ends: 2089 [2021-08-21 18:25:43,790 INFO L226 Difference]: Without dead ends: 2049 [2021-08-21 18:25:43,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 673.9ms TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 18:25:43,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-08-21 18:25:43,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1849. [2021-08-21 18:25:43,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1848 states have (on average 2.0167748917748916) internal successors, (3727), 1848 states have internal predecessors, (3727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:43,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 3727 transitions. [2021-08-21 18:25:43,805 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 3727 transitions. Word has length 88 [2021-08-21 18:25:43,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:25:43,805 INFO L470 AbstractCegarLoop]: Abstraction has 1849 states and 3727 transitions. [2021-08-21 18:25:43,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 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) [2021-08-21 18:25:43,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 3727 transitions. [2021-08-21 18:25:43,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-08-21 18:25:43,806 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:25:43,806 INFO L512 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:25:43,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-21 18:25:44,007 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 [2021-08-21 18:25:44,007 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:25:44,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:25:44,007 INFO L82 PathProgramCache]: Analyzing trace with hash -117829724, now seen corresponding path program 71 times [2021-08-21 18:25:44,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:25:44,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903862458] [2021-08-21 18:25:44,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:25:44,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:25:44,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:25:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:47,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:25:47,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903862458] [2021-08-21 18:25:47,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903862458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:47,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688345229] [2021-08-21 18:25:47,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:25:47,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:25:47,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:25:47,241 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) [2021-08-21 18:25:47,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-21 18:25:49,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-08-21 18:25:49,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:25:49,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 89 conjunts are in the unsatisfiable core [2021-08-21 18:25:49,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:25:57,123 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-08-21 18:25:57,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 18 [2021-08-21 18:25:57,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 780 proven. 860 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:57,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688345229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:57,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:25:57,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 162 [2021-08-21 18:25:57,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120348846] [2021-08-21 18:25:57,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2021-08-21 18:25:57,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:25:57,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2021-08-21 18:25:57,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3483, Invalid=22923, Unknown=0, NotChecked=0, Total=26406 [2021-08-21 18:25:57,138 INFO L87 Difference]: Start difference. First operand 1849 states and 3727 transitions. Second operand has 163 states, 163 states have (on average 1.0613496932515338) internal successors, (173), 162 states have internal predecessors, (173), 0 states have call successors, (0), 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... [2021-08-21 18:27:54,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 613 states. [2021-08-21 18:27:54,926 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 18:27:54,929 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 18:27:54,937 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 [2021-08-21 18:27:54,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-21 18:27:55,127 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 [2021-08-21 18:27:55,127 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (1849states) and FLOYD_HOARE automaton (currently 613 states, 163 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 771 known predicates. [2021-08-21 18:27:55,128 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 18:27:55,129 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 18:27:55,132 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 18:27:55,132 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 18:27:55,135 INFO L202 PluginConnector]: Adding new model simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:27:55 BasicIcfg [2021-08-21 18:27:55,135 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 18:27:55,136 INFO L168 Benchmark]: Toolchain (without parser) took 745928.30 ms. Allocated memory was 196.1 MB in the beginning and 1.2 GB in the end (delta: 1.0 GB). Free memory was 175.7 MB in the beginning and 614.1 MB in the end (delta: -438.3 MB). Peak memory consumption was 590.3 MB. Max. memory is 8.0 GB. [2021-08-21 18:27:55,136 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.17 ms. Allocated memory is still 196.1 MB. Free memory is still 176.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 18:27:55,136 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.19 ms. Allocated memory is still 196.1 MB. Free memory was 175.6 MB in the beginning and 174.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 18:27:55,136 INFO L168 Benchmark]: Boogie Preprocessor took 16.91 ms. Allocated memory is still 196.1 MB. Free memory was 174.2 MB in the beginning and 173.3 MB in the end (delta: 881.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 18:27:55,136 INFO L168 Benchmark]: RCFGBuilder took 284.30 ms. Allocated memory is still 196.1 MB. Free memory was 173.2 MB in the beginning and 162.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-08-21 18:27:55,136 INFO L168 Benchmark]: TraceAbstraction took 745595.48 ms. Allocated memory was 196.1 MB in the beginning and 1.2 GB in the end (delta: 1.0 GB). Free memory was 161.8 MB in the beginning and 614.1 MB in the end (delta: -452.3 MB). Peak memory consumption was 574.6 MB. Max. memory is 8.0 GB. [2021-08-21 18:27:55,137 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 0.17 ms. Allocated memory is still 196.1 MB. Free memory is still 176.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 26.19 ms. Allocated memory is still 196.1 MB. Free memory was 175.6 MB in the beginning and 174.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.91 ms. Allocated memory is still 196.1 MB. Free memory was 174.2 MB in the beginning and 173.3 MB in the end (delta: 881.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 284.30 ms. Allocated memory is still 196.1 MB. Free memory was 173.2 MB in the beginning and 162.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 745595.48 ms. Allocated memory was 196.1 MB in the beginning and 1.2 GB in the end (delta: 1.0 GB). Free memory was 161.8 MB in the beginning and 614.1 MB in the end (delta: -452.3 MB). Peak memory consumption was 574.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 12, positive: 8, positive conditional: 8, positive unconditional: 0, negative: 4, negative conditional: 4, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 8, positive: 8, positive conditional: 0, positive unconditional: 8, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 8, positive: 8, positive conditional: 0, positive unconditional: 8, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 8, positive: 7, positive conditional: 0, positive unconditional: 7, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 13, positive: 13, positive conditional: 0, positive unconditional: 13, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 8, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 8, unknown conditional: 0, unknown unconditional: 8] , Statistics on independence cache: Total cache size (in pairs): 8, Positive cache size: 8, Positive conditional cache size: 0, Positive unconditional cache size: 8, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 4 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1849states) and FLOYD_HOARE automaton (currently 613 states, 163 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 771 known predicates. - TimeoutResultAtElement [Line: 41]: 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 (1849states) and FLOYD_HOARE automaton (currently 613 states, 163 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 771 known predicates. - TimeoutResultAtElement [Line: 41]: 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 (1849states) and FLOYD_HOARE automaton (currently 613 states, 163 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 771 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 745484.4ms, OverallIterations: 73, TraceHistogramMax: 40, EmptinessCheckTime: 65.8ms, AutomataDifference: 572624.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 104.2ms, PartialOrderReductionTime: 61.2ms, HoareTripleCheckerStatistics: 7405 SDtfs, 73264 SDslu, 254619 SDs, 0 SdLazy, 70356 SolverSat, 31570 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 37831.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10527 GetRequests, 3778 SyntacticMatches, 61 SemanticMatches, 6687 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791653 ImplicationChecksByTransitivity, 583747.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1849occurred in iteration=72, InterpolantAutomatonStates: 4321, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 735.6ms AutomataMinimizationTime, 72 MinimizatonAttempts, 65841 StatesRemovedByMinimization, 68 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 468.4ms SsaConstructionTime, 2634.0ms SatisfiabilityAnalysisTime, 102885.9ms InterpolantComputationTime, 7195 NumberOfCodeBlocks, 7195 NumberOfCodeBlocksAsserted, 538 NumberOfCheckSat, 7051 ConstructedInterpolants, 143 QuantifiedInterpolants, 46249 SizeOfPredicates, 54 NumberOfNonLiveVariables, 14848 ConjunctsInSsa, 4446 ConjunctsInUnsatCore, 144 InterpolantComputations, 2 PerfectInterpolantSequences, 21525/83065 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