/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.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-sum.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-01 18:08:34,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-01 18:08:34,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-01 18:08:34,718 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-01 18:08:34,718 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-01 18:08:34,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-01 18:08:34,722 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-01 18:08:34,723 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-01 18:08:34,724 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-01 18:08:34,725 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-01 18:08:34,725 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-01 18:08:34,726 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-01 18:08:34,726 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-01 18:08:34,727 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-01 18:08:34,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-01 18:08:34,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-01 18:08:34,728 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-01 18:08:34,729 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-01 18:08:34,730 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-01 18:08:34,734 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-01 18:08:34,738 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-01 18:08:34,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-01 18:08:34,746 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-01 18:08:34,747 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-01 18:08:34,750 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-01 18:08:34,750 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-01 18:08:34,750 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-01 18:08:34,750 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-01 18:08:34,751 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-01 18:08:34,751 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-01 18:08:34,751 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-01 18:08:34,752 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-01 18:08:34,752 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-01 18:08:34,753 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-01 18:08:34,753 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-01 18:08:34,753 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-01 18:08:34,754 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-01 18:08:34,754 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-01 18:08:34,754 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-01 18:08:34,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-01 18:08:34,755 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-01 18:08:34,760 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-01 18:08:34,772 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-01 18:08:34,772 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-01 18:08:34,772 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-01 18:08:34,772 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-01 18:08:34,773 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-01 18:08:34,773 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-01 18:08:34,773 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-01 18:08:34,773 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-01 18:08:34,773 INFO L138 SettingsManager]: * Use SBE=true [2022-03-01 18:08:34,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-01 18:08:34,774 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-01 18:08:34,774 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-01 18:08:34,774 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-01 18:08:34,774 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-01 18:08:34,774 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-01 18:08:34,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-01 18:08:34,774 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-01 18:08:34,774 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-01 18:08:34,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-01 18:08:34,774 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-01 18:08:34,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-01 18:08:34,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-01 18:08:34,775 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-01 18:08:34,775 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-01 18:08:34,775 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-01 18:08:34,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:08:34,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-01 18:08:34,775 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-01 18:08:34,775 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-01 18:08:34,775 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-01 18:08:34,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-01 18:08:34,775 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-01 18:08:34,776 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-01 18:08:34,776 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-01 18:08:34,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-01 18:08:34,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-01 18:08:34,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-01 18:08:34,969 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-01 18:08:34,970 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-01 18:08:34,971 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-sum.wvr.bpl [2022-03-01 18:08:34,971 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-sum.wvr.bpl' [2022-03-01 18:08:34,992 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-01 18:08:34,993 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-01 18:08:34,993 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-01 18:08:34,993 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-01 18:08:34,993 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-01 18:08:35,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:08:34" (1/1) ... [2022-03-01 18:08:35,021 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:08:34" (1/1) ... [2022-03-01 18:08:35,025 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-01 18:08:35,027 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-01 18:08:35,028 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-01 18:08:35,028 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-01 18:08:35,028 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-01 18:08:35,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:08:34" (1/1) ... [2022-03-01 18:08:35,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:08:34" (1/1) ... [2022-03-01 18:08:35,035 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:08:34" (1/1) ... [2022-03-01 18:08:35,035 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:08:34" (1/1) ... [2022-03-01 18:08:35,039 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:08:34" (1/1) ... [2022-03-01 18:08:35,042 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:08:34" (1/1) ... [2022-03-01 18:08:35,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:08:34" (1/1) ... [2022-03-01 18:08:35,046 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-01 18:08:35,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-01 18:08:35,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-01 18:08:35,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-01 18:08:35,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:08:34" (1/1) ... [2022-03-01 18:08:35,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:08:35,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:35,085 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-01 18:08:35,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-01 18:08:35,171 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-01 18:08:35,171 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-01 18:08:35,171 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-01 18:08:35,171 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-01 18:08:35,171 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-01 18:08:35,171 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-01 18:08:35,171 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-01 18:08:35,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-01 18:08:35,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-01 18:08:35,172 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-01 18:08:35,172 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-01 18:08:35,172 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-01 18:08:35,173 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-01 18:08:35,234 INFO L234 CfgBuilder]: Building ICFG [2022-03-01 18:08:35,235 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-01 18:08:35,422 INFO L275 CfgBuilder]: Performing block encoding [2022-03-01 18:08:35,447 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-01 18:08:35,448 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-01 18:08:35,449 INFO L202 PluginConnector]: Adding new model three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:08:35 BoogieIcfgContainer [2022-03-01 18:08:35,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-01 18:08:35,451 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-01 18:08:35,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-01 18:08:35,470 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-01 18:08:35,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:08:34" (1/2) ... [2022-03-01 18:08:35,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c59f148 and model type three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.03 06:08:35, skipping insertion in model container [2022-03-01 18:08:35,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:08:35" (2/2) ... [2022-03-01 18:08:35,481 INFO L111 eAbstractionObserver]: Analyzing ICFG three-array-sum.wvr.bpl [2022-03-01 18:08:35,484 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-01 18:08:35,485 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-01 18:08:35,485 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-01 18:08:35,485 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-01 18:08:35,583 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-01 18:08:35,704 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-01 18:08:35,720 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-01 18:08:35,721 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-01 18:08:35,751 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 35 places, 29 transitions, 82 flow [2022-03-01 18:08:35,795 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 131 states, 130 states have (on average 3.023076923076923) internal successors, (393), 130 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:35,799 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 130 states have (on average 3.023076923076923) internal successors, (393), 130 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:35,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 18:08:35,811 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:35,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:35,812 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:35,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:35,815 INFO L85 PathProgramCache]: Analyzing trace with hash 510990075, now seen corresponding path program 1 times [2022-03-01 18:08:35,822 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:35,822 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570058260] [2022-03-01 18:08:35,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:35,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:35,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:35,978 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:35,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570058260] [2022-03-01 18:08:35,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570058260] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:08:35,979 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:08:35,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-01 18:08:35,981 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308357827] [2022-03-01 18:08:35,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:08:35,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 18:08:35,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:36,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 18:08:36,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 18:08:36,006 INFO L87 Difference]: Start difference. First operand has 131 states, 130 states have (on average 3.023076923076923) internal successors, (393), 130 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:36,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:36,045 INFO L93 Difference]: Finished difference Result 257 states and 781 transitions. [2022-03-01 18:08:36,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 18:08:36,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 18:08:36,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:36,092 INFO L225 Difference]: With dead ends: 257 [2022-03-01 18:08:36,092 INFO L226 Difference]: Without dead ends: 230 [2022-03-01 18:08:36,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 18:08:36,096 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:36,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:08:36,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-03-01 18:08:36,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 188. [2022-03-01 18:08:36,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 3.0802139037433154) internal successors, (576), 187 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:36,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 576 transitions. [2022-03-01 18:08:36,136 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 576 transitions. Word has length 16 [2022-03-01 18:08:36,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:36,137 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 576 transitions. [2022-03-01 18:08:36,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:36,138 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 576 transitions. [2022-03-01 18:08:36,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 18:08:36,139 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:36,139 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:36,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-01 18:08:36,140 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:36,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:36,141 INFO L85 PathProgramCache]: Analyzing trace with hash 761707259, now seen corresponding path program 1 times [2022-03-01 18:08:36,141 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:36,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501317408] [2022-03-01 18:08:36,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:36,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:36,178 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:36,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501317408] [2022-03-01 18:08:36,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501317408] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:08:36,178 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:08:36,178 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 18:08:36,178 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224484458] [2022-03-01 18:08:36,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:08:36,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 18:08:36,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:36,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 18:08:36,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-01 18:08:36,180 INFO L87 Difference]: Start difference. First operand 188 states and 576 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:36,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:36,235 INFO L93 Difference]: Finished difference Result 355 states and 1087 transitions. [2022-03-01 18:08:36,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 18:08:36,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 18:08:36,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:36,239 INFO L225 Difference]: With dead ends: 355 [2022-03-01 18:08:36,239 INFO L226 Difference]: Without dead ends: 355 [2022-03-01 18:08:36,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-01 18:08:36,240 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:36,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 36 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:08:36,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-03-01 18:08:36,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 213. [2022-03-01 18:08:36,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 3.1792452830188678) internal successors, (674), 212 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:36,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 674 transitions. [2022-03-01 18:08:36,257 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 674 transitions. Word has length 18 [2022-03-01 18:08:36,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:36,257 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 674 transitions. [2022-03-01 18:08:36,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:36,257 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 674 transitions. [2022-03-01 18:08:36,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 18:08:36,259 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:36,259 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:36,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-01 18:08:36,259 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:36,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:36,260 INFO L85 PathProgramCache]: Analyzing trace with hash 988928639, now seen corresponding path program 2 times [2022-03-01 18:08:36,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:36,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639932008] [2022-03-01 18:08:36,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:36,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:36,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:36,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:36,298 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:36,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639932008] [2022-03-01 18:08:36,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639932008] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:08:36,298 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:08:36,298 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 18:08:36,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415986617] [2022-03-01 18:08:36,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:08:36,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 18:08:36,299 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:36,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 18:08:36,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:08:36,299 INFO L87 Difference]: Start difference. First operand 213 states and 674 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:36,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:36,366 INFO L93 Difference]: Finished difference Result 450 states and 1348 transitions. [2022-03-01 18:08:36,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 18:08:36,366 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 18:08:36,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:36,369 INFO L225 Difference]: With dead ends: 450 [2022-03-01 18:08:36,369 INFO L226 Difference]: Without dead ends: 450 [2022-03-01 18:08:36,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:08:36,370 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 48 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:36,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 47 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:08:36,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-03-01 18:08:36,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 235. [2022-03-01 18:08:36,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 3.1837606837606836) internal successors, (745), 234 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:36,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 745 transitions. [2022-03-01 18:08:36,383 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 745 transitions. Word has length 18 [2022-03-01 18:08:36,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:36,384 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 745 transitions. [2022-03-01 18:08:36,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:36,384 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 745 transitions. [2022-03-01 18:08:36,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 18:08:36,385 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:36,386 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:36,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-01 18:08:36,386 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:36,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:36,387 INFO L85 PathProgramCache]: Analyzing trace with hash 901635393, now seen corresponding path program 3 times [2022-03-01 18:08:36,387 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:36,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597538961] [2022-03-01 18:08:36,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:36,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:36,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:36,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:36,418 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:36,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597538961] [2022-03-01 18:08:36,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597538961] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:08:36,419 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:08:36,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 18:08:36,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709731832] [2022-03-01 18:08:36,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:08:36,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 18:08:36,420 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:36,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 18:08:36,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 18:08:36,420 INFO L87 Difference]: Start difference. First operand 235 states and 745 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:36,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:36,465 INFO L93 Difference]: Finished difference Result 349 states and 1037 transitions. [2022-03-01 18:08:36,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 18:08:36,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 18:08:36,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:36,468 INFO L225 Difference]: With dead ends: 349 [2022-03-01 18:08:36,468 INFO L226 Difference]: Without dead ends: 345 [2022-03-01 18:08:36,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:08:36,477 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:36,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 30 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:08:36,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-03-01 18:08:36,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 274. [2022-03-01 18:08:36,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.128205128205128) internal successors, (854), 273 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:36,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 854 transitions. [2022-03-01 18:08:36,495 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 854 transitions. Word has length 18 [2022-03-01 18:08:36,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:36,495 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 854 transitions. [2022-03-01 18:08:36,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:36,496 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 854 transitions. [2022-03-01 18:08:36,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 18:08:36,499 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:36,499 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:36,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-01 18:08:36,500 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:36,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:36,502 INFO L85 PathProgramCache]: Analyzing trace with hash 938496605, now seen corresponding path program 1 times [2022-03-01 18:08:36,503 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:36,503 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242933942] [2022-03-01 18:08:36,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:36,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:36,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:36,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:36,535 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:36,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242933942] [2022-03-01 18:08:36,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242933942] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:08:36,535 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:08:36,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 18:08:36,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572538394] [2022-03-01 18:08:36,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:08:36,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 18:08:36,536 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:36,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 18:08:36,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 18:08:36,537 INFO L87 Difference]: Start difference. First operand 274 states and 854 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:36,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:36,613 INFO L93 Difference]: Finished difference Result 345 states and 1038 transitions. [2022-03-01 18:08:36,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 18:08:36,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 18:08:36,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:36,617 INFO L225 Difference]: With dead ends: 345 [2022-03-01 18:08:36,617 INFO L226 Difference]: Without dead ends: 307 [2022-03-01 18:08:36,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:08:36,618 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:36,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 21 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:08:36,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-03-01 18:08:36,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 276. [2022-03-01 18:08:36,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.036363636363636) internal successors, (835), 275 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:36,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 835 transitions. [2022-03-01 18:08:36,627 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 835 transitions. Word has length 19 [2022-03-01 18:08:36,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:36,627 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 835 transitions. [2022-03-01 18:08:36,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:36,627 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 835 transitions. [2022-03-01 18:08:36,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 18:08:36,628 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:36,628 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:36,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-01 18:08:36,628 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:36,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:36,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1599468323, now seen corresponding path program 2 times [2022-03-01 18:08:36,629 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:36,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798935752] [2022-03-01 18:08:36,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:36,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:36,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:36,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:36,653 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:36,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798935752] [2022-03-01 18:08:36,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798935752] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:08:36,654 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:08:36,654 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-01 18:08:36,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692138376] [2022-03-01 18:08:36,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:08:36,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 18:08:36,654 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:36,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 18:08:36,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 18:08:36,655 INFO L87 Difference]: Start difference. First operand 276 states and 835 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:36,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:36,673 INFO L93 Difference]: Finished difference Result 257 states and 747 transitions. [2022-03-01 18:08:36,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 18:08:36,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 18:08:36,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:36,675 INFO L225 Difference]: With dead ends: 257 [2022-03-01 18:08:36,675 INFO L226 Difference]: Without dead ends: 241 [2022-03-01 18:08:36,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 18:08:36,676 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:36,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 21 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:08:36,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-03-01 18:08:36,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 231. [2022-03-01 18:08:36,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 3.017391304347826) internal successors, (694), 230 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:36,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 694 transitions. [2022-03-01 18:08:36,682 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 694 transitions. Word has length 19 [2022-03-01 18:08:36,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:36,682 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 694 transitions. [2022-03-01 18:08:36,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:36,683 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 694 transitions. [2022-03-01 18:08:36,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 18:08:36,683 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:36,683 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:36,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-01 18:08:36,684 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:36,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:36,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1736700641, now seen corresponding path program 1 times [2022-03-01 18:08:36,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:36,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297725228] [2022-03-01 18:08:36,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:36,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:36,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:36,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:08:36,718 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:36,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297725228] [2022-03-01 18:08:36,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297725228] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:36,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450306475] [2022-03-01 18:08:36,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:36,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:36,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:36,728 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:08:36,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-01 18:08:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:36,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-01 18:08:36,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:36,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:08:36,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:36,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:08:36,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450306475] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:36,912 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:36,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-03-01 18:08:36,913 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357681804] [2022-03-01 18:08:36,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:36,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:08:36,913 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:36,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:08:36,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:08:36,914 INFO L87 Difference]: Start difference. First operand 231 states and 694 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:36,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:36,995 INFO L93 Difference]: Finished difference Result 295 states and 908 transitions. [2022-03-01 18:08:36,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 18:08:36,995 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-01 18:08:36,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:36,996 INFO L225 Difference]: With dead ends: 295 [2022-03-01 18:08:36,997 INFO L226 Difference]: Without dead ends: 295 [2022-03-01 18:08:36,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:08:36,998 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:36,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 31 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:08:36,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-03-01 18:08:37,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 203. [2022-03-01 18:08:37,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 3.0247524752475248) internal successors, (611), 202 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:37,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 611 transitions. [2022-03-01 18:08:37,003 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 611 transitions. Word has length 20 [2022-03-01 18:08:37,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:37,003 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 611 transitions. [2022-03-01 18:08:37,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:37,004 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 611 transitions. [2022-03-01 18:08:37,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 18:08:37,004 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:37,004 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:37,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-01 18:08:37,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:37,222 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:37,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:37,223 INFO L85 PathProgramCache]: Analyzing trace with hash 345358593, now seen corresponding path program 1 times [2022-03-01 18:08:37,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:37,223 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22871529] [2022-03-01 18:08:37,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:37,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:37,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:08:37,288 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:37,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22871529] [2022-03-01 18:08:37,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22871529] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:37,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126846460] [2022-03-01 18:08:37,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:37,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:37,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:37,290 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:08:37,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-01 18:08:37,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:37,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-01 18:08:37,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:08:37,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:37,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:08:37,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126846460] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:37,433 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:37,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2022-03-01 18:08:37,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203955073] [2022-03-01 18:08:37,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:37,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 18:08:37,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:37,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 18:08:37,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:08:37,435 INFO L87 Difference]: Start difference. First operand 203 states and 611 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:37,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:37,517 INFO L93 Difference]: Finished difference Result 288 states and 873 transitions. [2022-03-01 18:08:37,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 18:08:37,519 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 18:08:37,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:37,525 INFO L225 Difference]: With dead ends: 288 [2022-03-01 18:08:37,525 INFO L226 Difference]: Without dead ends: 288 [2022-03-01 18:08:37,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:08:37,526 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:37,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 34 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:08:37,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-03-01 18:08:37,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 215. [2022-03-01 18:08:37,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.0233644859813085) internal successors, (647), 214 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:37,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 647 transitions. [2022-03-01 18:08:37,534 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 647 transitions. Word has length 21 [2022-03-01 18:08:37,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:37,534 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 647 transitions. [2022-03-01 18:08:37,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:37,534 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 647 transitions. [2022-03-01 18:08:37,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 18:08:37,535 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:37,535 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:37,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-01 18:08:37,751 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,SelfDestructingSolverStorable7 [2022-03-01 18:08:37,751 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:37,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:37,752 INFO L85 PathProgramCache]: Analyzing trace with hash -41937549, now seen corresponding path program 1 times [2022-03-01 18:08:37,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:37,753 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375719553] [2022-03-01 18:08:37,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:37,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:37,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:37,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:37,859 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:37,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375719553] [2022-03-01 18:08:37,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375719553] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:37,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699948319] [2022-03-01 18:08:37,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:37,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:37,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:37,872 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:08:37,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-01 18:08:37,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:37,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 18:08:37,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:38,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-03-01 18:08:38,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-03-01 18:08:38,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-01 18:08:38,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 18:08:38,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:38,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:38,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-03-01 18:08:38,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:08:38,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:08:38,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2022-03-01 18:08:38,374 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:08:38,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 19 [2022-03-01 18:08:38,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-01 18:08:38,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-03-01 18:08:38,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:38,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699948319] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:38,446 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:38,447 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-03-01 18:08:38,447 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877921164] [2022-03-01 18:08:38,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:38,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:08:38,447 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:38,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:08:38,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:08:38,448 INFO L87 Difference]: Start difference. First operand 215 states and 647 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:38,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:38,561 INFO L93 Difference]: Finished difference Result 476 states and 1460 transitions. [2022-03-01 18:08:38,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 18:08:38,562 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 18:08:38,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:38,564 INFO L225 Difference]: With dead ends: 476 [2022-03-01 18:08:38,564 INFO L226 Difference]: Without dead ends: 449 [2022-03-01 18:08:38,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:08:38,564 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:38,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 80 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:08:38,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-03-01 18:08:38,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 314. [2022-03-01 18:08:38,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.073482428115016) internal successors, (962), 313 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:38,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 962 transitions. [2022-03-01 18:08:38,571 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 962 transitions. Word has length 23 [2022-03-01 18:08:38,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:38,571 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 962 transitions. [2022-03-01 18:08:38,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:38,572 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 962 transitions. [2022-03-01 18:08:38,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 18:08:38,572 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:38,572 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:38,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-01 18:08:38,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:38,789 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:38,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:38,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1347256959, now seen corresponding path program 2 times [2022-03-01 18:08:38,790 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:38,790 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415235015] [2022-03-01 18:08:38,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:38,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:38,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:38,909 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:38,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415235015] [2022-03-01 18:08:38,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415235015] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:38,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309934] [2022-03-01 18:08:38,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:08:38,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:38,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:38,924 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:08:38,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-01 18:08:38,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:08:38,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:08:38,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 18:08:38,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:39,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:08:39,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-03-01 18:08:39,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-03-01 18:08:39,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-01 18:08:39,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:39,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:39,323 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:08:39,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2022-03-01 18:08:39,330 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:08:39,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2022-03-01 18:08:39,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2022-03-01 18:08:39,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 18:08:39,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-03-01 18:08:39,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:08:39,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:39,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309934] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:39,452 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:39,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-01 18:08:39,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277960172] [2022-03-01 18:08:39,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:39,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 18:08:39,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:39,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 18:08:39,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:08:39,454 INFO L87 Difference]: Start difference. First operand 314 states and 962 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:39,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:39,551 INFO L93 Difference]: Finished difference Result 517 states and 1600 transitions. [2022-03-01 18:08:39,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 18:08:39,551 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 18:08:39,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:39,554 INFO L225 Difference]: With dead ends: 517 [2022-03-01 18:08:39,554 INFO L226 Difference]: Without dead ends: 490 [2022-03-01 18:08:39,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:08:39,554 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 57 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:39,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 73 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:08:39,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-03-01 18:08:39,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 366. [2022-03-01 18:08:39,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.084931506849315) internal successors, (1126), 365 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:39,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1126 transitions. [2022-03-01 18:08:39,563 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1126 transitions. Word has length 23 [2022-03-01 18:08:39,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:39,563 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 1126 transitions. [2022-03-01 18:08:39,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:39,564 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1126 transitions. [2022-03-01 18:08:39,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 18:08:39,566 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:39,566 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:39,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-01 18:08:39,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:39,783 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:39,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:39,783 INFO L85 PathProgramCache]: Analyzing trace with hash 228461667, now seen corresponding path program 3 times [2022-03-01 18:08:39,783 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:39,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850474918] [2022-03-01 18:08:39,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:39,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:39,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:39,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:39,869 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:39,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850474918] [2022-03-01 18:08:39,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850474918] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:39,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512605172] [2022-03-01 18:08:39,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:08:39,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:39,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:39,884 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:08:39,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-01 18:08:39,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:08:39,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:08:39,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 18:08:39,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:40,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:08:40,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-01 18:08:40,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-01 18:08:40,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-03-01 18:08:40,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:40,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:40,288 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:08:40,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-03-01 18:08:40,295 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:08:40,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2022-03-01 18:08:40,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-03-01 18:08:40,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 18:08:40,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-03-01 18:08:40,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:08:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:40,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512605172] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:40,485 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:40,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-01 18:08:40,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349110850] [2022-03-01 18:08:40,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:40,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 18:08:40,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:40,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 18:08:40,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:08:40,488 INFO L87 Difference]: Start difference. First operand 366 states and 1126 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:40,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:40,643 INFO L93 Difference]: Finished difference Result 572 states and 1775 transitions. [2022-03-01 18:08:40,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 18:08:40,643 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 18:08:40,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:40,646 INFO L225 Difference]: With dead ends: 572 [2022-03-01 18:08:40,646 INFO L226 Difference]: Without dead ends: 545 [2022-03-01 18:08:40,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:08:40,647 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 42 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:40,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 97 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:08:40,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-03-01 18:08:40,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 366. [2022-03-01 18:08:40,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.084931506849315) internal successors, (1126), 365 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:40,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1126 transitions. [2022-03-01 18:08:40,655 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1126 transitions. Word has length 23 [2022-03-01 18:08:40,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:40,656 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 1126 transitions. [2022-03-01 18:08:40,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:40,656 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1126 transitions. [2022-03-01 18:08:40,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-01 18:08:40,657 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:40,657 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:40,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-01 18:08:40,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-01 18:08:40,871 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:40,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:40,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1894937297, now seen corresponding path program 4 times [2022-03-01 18:08:40,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:40,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437067464] [2022-03-01 18:08:40,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:40,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:40,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:40,899 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:40,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437067464] [2022-03-01 18:08:40,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437067464] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:40,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292017007] [2022-03-01 18:08:40,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:08:40,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:40,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:40,900 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:08:40,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-01 18:08:40,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:08:40,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:08:40,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:08:40,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:40,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:40,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:41,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:41,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292017007] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:41,008 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:41,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-01 18:08:41,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638799024] [2022-03-01 18:08:41,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:41,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 18:08:41,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:41,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 18:08:41,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:08:41,009 INFO L87 Difference]: Start difference. First operand 366 states and 1126 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:41,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:41,106 INFO L93 Difference]: Finished difference Result 886 states and 2662 transitions. [2022-03-01 18:08:41,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 18:08:41,106 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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 25 [2022-03-01 18:08:41,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:41,110 INFO L225 Difference]: With dead ends: 886 [2022-03-01 18:08:41,110 INFO L226 Difference]: Without dead ends: 886 [2022-03-01 18:08:41,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:08:41,111 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 93 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:41,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 117 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:08:41,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-03-01 18:08:41,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 517. [2022-03-01 18:08:41,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 3.203488372093023) internal successors, (1653), 516 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:41,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1653 transitions. [2022-03-01 18:08:41,124 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1653 transitions. Word has length 25 [2022-03-01 18:08:41,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:41,125 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 1653 transitions. [2022-03-01 18:08:41,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:41,125 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1653 transitions. [2022-03-01 18:08:41,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-01 18:08:41,126 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:41,126 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:41,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-01 18:08:41,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:41,337 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:41,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:41,337 INFO L85 PathProgramCache]: Analyzing trace with hash -595223613, now seen corresponding path program 5 times [2022-03-01 18:08:41,338 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:41,338 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263566962] [2022-03-01 18:08:41,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:41,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:41,375 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:41,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263566962] [2022-03-01 18:08:41,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263566962] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:41,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138204743] [2022-03-01 18:08:41,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:08:41,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:41,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:41,376 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:08:41,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-01 18:08:41,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:08:41,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:08:41,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:08:41,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:08:41,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:41,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:08:41,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138204743] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:41,507 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:41,507 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-03-01 18:08:41,507 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457531724] [2022-03-01 18:08:41,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:41,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 18:08:41,507 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:41,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 18:08:41,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:08:41,508 INFO L87 Difference]: Start difference. First operand 517 states and 1653 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:42,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:42,233 INFO L93 Difference]: Finished difference Result 1033 states and 3239 transitions. [2022-03-01 18:08:42,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 18:08:42,233 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-01 18:08:42,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:42,238 INFO L225 Difference]: With dead ends: 1033 [2022-03-01 18:08:42,238 INFO L226 Difference]: Without dead ends: 1033 [2022-03-01 18:08:42,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=398, Invalid=1324, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 18:08:42,239 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 332 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:42,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 85 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:08:42,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2022-03-01 18:08:42,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 646. [2022-03-01 18:08:42,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 3.2496124031007754) internal successors, (2096), 645 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:42,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 2096 transitions. [2022-03-01 18:08:42,256 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 2096 transitions. Word has length 25 [2022-03-01 18:08:42,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:42,256 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 2096 transitions. [2022-03-01 18:08:42,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:42,257 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 2096 transitions. [2022-03-01 18:08:42,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-01 18:08:42,258 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:42,258 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:42,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-01 18:08:42,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:42,481 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:42,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:42,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1959818837, now seen corresponding path program 6 times [2022-03-01 18:08:42,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:42,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216402286] [2022-03-01 18:08:42,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:42,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:42,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:42,525 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:42,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216402286] [2022-03-01 18:08:42,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216402286] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:42,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790299736] [2022-03-01 18:08:42,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:08:42,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:42,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:42,528 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:08:42,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-01 18:08:42,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:08:42,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:08:42,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:08:42,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:08:42,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:42,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:08:42,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790299736] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:42,683 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:42,683 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-01 18:08:42,683 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536253041] [2022-03-01 18:08:42,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:42,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 18:08:42,685 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:42,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 18:08:42,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:08:42,685 INFO L87 Difference]: Start difference. First operand 646 states and 2096 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:43,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:43,204 INFO L93 Difference]: Finished difference Result 2177 states and 6995 transitions. [2022-03-01 18:08:43,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 18:08:43,205 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-01 18:08:43,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:43,214 INFO L225 Difference]: With dead ends: 2177 [2022-03-01 18:08:43,214 INFO L226 Difference]: Without dead ends: 2151 [2022-03-01 18:08:43,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=251, Invalid=741, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:08:43,215 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 240 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:43,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 73 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:08:43,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2022-03-01 18:08:43,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 1034. [2022-03-01 18:08:43,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 3.478218780251694) internal successors, (3593), 1033 states have internal predecessors, (3593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:43,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3593 transitions. [2022-03-01 18:08:43,245 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3593 transitions. Word has length 25 [2022-03-01 18:08:43,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:43,245 INFO L470 AbstractCegarLoop]: Abstraction has 1034 states and 3593 transitions. [2022-03-01 18:08:43,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:43,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3593 transitions. [2022-03-01 18:08:43,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-01 18:08:43,249 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:43,249 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:43,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-01 18:08:43,464 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,SelfDestructingSolverStorable13 [2022-03-01 18:08:43,465 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:43,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:43,465 INFO L85 PathProgramCache]: Analyzing trace with hash -131125633, now seen corresponding path program 7 times [2022-03-01 18:08:43,465 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:43,465 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269058366] [2022-03-01 18:08:43,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:43,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:43,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:43,495 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:43,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269058366] [2022-03-01 18:08:43,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269058366] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:43,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909760381] [2022-03-01 18:08:43,495 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:08:43,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:43,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:43,496 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:08:43,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-01 18:08:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:43,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:08:43,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:43,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:43,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:43,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909760381] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:43,607 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:43,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-01 18:08:43,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666957260] [2022-03-01 18:08:43,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:43,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:08:43,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:43,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:08:43,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:08:43,610 INFO L87 Difference]: Start difference. First operand 1034 states and 3593 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:43,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:43,715 INFO L93 Difference]: Finished difference Result 1476 states and 4927 transitions. [2022-03-01 18:08:43,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 18:08:43,715 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 25 [2022-03-01 18:08:43,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:43,730 INFO L225 Difference]: With dead ends: 1476 [2022-03-01 18:08:43,730 INFO L226 Difference]: Without dead ends: 1470 [2022-03-01 18:08:43,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-01 18:08:43,733 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 60 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:43,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 92 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:08:43,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-03-01 18:08:43,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1051. [2022-03-01 18:08:43,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1050 states have (on average 3.4647619047619047) internal successors, (3638), 1050 states have internal predecessors, (3638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:43,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 3638 transitions. [2022-03-01 18:08:43,760 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 3638 transitions. Word has length 25 [2022-03-01 18:08:43,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:43,760 INFO L470 AbstractCegarLoop]: Abstraction has 1051 states and 3638 transitions. [2022-03-01 18:08:43,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:43,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 3638 transitions. [2022-03-01 18:08:43,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-01 18:08:43,762 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:43,762 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:43,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-01 18:08:43,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-01 18:08:43,979 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:43,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:43,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1794697629, now seen corresponding path program 8 times [2022-03-01 18:08:43,979 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:43,979 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486359278] [2022-03-01 18:08:43,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:43,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:44,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:44,010 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:44,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486359278] [2022-03-01 18:08:44,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486359278] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:44,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968385140] [2022-03-01 18:08:44,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:08:44,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:44,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:44,012 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:08:44,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-01 18:08:44,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:08:44,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:08:44,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:08:44,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:44,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:44,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:44,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968385140] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:44,126 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:44,126 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-01 18:08:44,126 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820400609] [2022-03-01 18:08:44,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:44,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 18:08:44,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:44,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 18:08:44,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:08:44,128 INFO L87 Difference]: Start difference. First operand 1051 states and 3638 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:44,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:44,249 INFO L93 Difference]: Finished difference Result 1980 states and 6727 transitions. [2022-03-01 18:08:44,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 18:08:44,250 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-01 18:08:44,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:44,258 INFO L225 Difference]: With dead ends: 1980 [2022-03-01 18:08:44,258 INFO L226 Difference]: Without dead ends: 1968 [2022-03-01 18:08:44,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:08:44,259 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 95 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:44,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 84 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:08:44,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2022-03-01 18:08:44,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1297. [2022-03-01 18:08:44,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.580246913580247) internal successors, (4640), 1296 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:44,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4640 transitions. [2022-03-01 18:08:44,289 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4640 transitions. Word has length 25 [2022-03-01 18:08:44,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:44,290 INFO L470 AbstractCegarLoop]: Abstraction has 1297 states and 4640 transitions. [2022-03-01 18:08:44,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:44,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4640 transitions. [2022-03-01 18:08:44,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-01 18:08:44,293 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:44,293 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:44,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-01 18:08:44,530 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,SelfDestructingSolverStorable15 [2022-03-01 18:08:44,530 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:44,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:44,531 INFO L85 PathProgramCache]: Analyzing trace with hash -675454435, now seen corresponding path program 9 times [2022-03-01 18:08:44,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:44,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256529073] [2022-03-01 18:08:44,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:44,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:44,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:44,576 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:44,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256529073] [2022-03-01 18:08:44,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256529073] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:44,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748648719] [2022-03-01 18:08:44,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:08:44,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:44,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:44,578 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:08:44,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-01 18:08:44,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:08:44,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:08:44,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:08:44,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:44,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:44,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748648719] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:44,721 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:44,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-01 18:08:44,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754419830] [2022-03-01 18:08:44,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:44,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 18:08:44,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:44,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 18:08:44,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:08:44,722 INFO L87 Difference]: Start difference. First operand 1297 states and 4640 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:44,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:44,819 INFO L93 Difference]: Finished difference Result 2951 states and 10415 transitions. [2022-03-01 18:08:44,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 18:08:44,819 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-01 18:08:44,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:44,831 INFO L225 Difference]: With dead ends: 2951 [2022-03-01 18:08:44,831 INFO L226 Difference]: Without dead ends: 2945 [2022-03-01 18:08:44,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:08:44,831 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 159 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:44,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 41 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:08:44,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2945 states. [2022-03-01 18:08:44,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2945 to 2000. [2022-03-01 18:08:44,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1999 states have (on average 3.773886943471736) internal successors, (7544), 1999 states have internal predecessors, (7544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:44,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 7544 transitions. [2022-03-01 18:08:44,879 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 7544 transitions. Word has length 25 [2022-03-01 18:08:44,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:44,879 INFO L470 AbstractCegarLoop]: Abstraction has 2000 states and 7544 transitions. [2022-03-01 18:08:44,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:44,880 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 7544 transitions. [2022-03-01 18:08:44,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-01 18:08:44,884 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:44,884 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:44,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-01 18:08:45,101 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,SelfDestructingSolverStorable16 [2022-03-01 18:08:45,101 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:45,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:45,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1549423517, now seen corresponding path program 10 times [2022-03-01 18:08:45,102 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:45,102 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103844401] [2022-03-01 18:08:45,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:45,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:45,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:45,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:45,162 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:45,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103844401] [2022-03-01 18:08:45,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103844401] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:45,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773827796] [2022-03-01 18:08:45,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:08:45,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:45,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:45,164 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:08:45,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-01 18:08:45,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:08:45,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:08:45,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:08:45,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:08:45,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:08:45,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773827796] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:45,277 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:45,277 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-01 18:08:45,277 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237741954] [2022-03-01 18:08:45,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:45,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:08:45,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:45,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:08:45,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:08:45,278 INFO L87 Difference]: Start difference. First operand 2000 states and 7544 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:45,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:45,365 INFO L93 Difference]: Finished difference Result 2777 states and 9915 transitions. [2022-03-01 18:08:45,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 18:08:45,365 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-01 18:08:45,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:45,382 INFO L225 Difference]: With dead ends: 2777 [2022-03-01 18:08:45,382 INFO L226 Difference]: Without dead ends: 2759 [2022-03-01 18:08:45,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:08:45,383 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 92 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:45,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 67 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:08:45,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2759 states. [2022-03-01 18:08:45,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2759 to 1995. [2022-03-01 18:08:45,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 3.7703109327983952) internal successors, (7518), 1994 states have internal predecessors, (7518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:45,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 7518 transitions. [2022-03-01 18:08:45,434 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 7518 transitions. Word has length 25 [2022-03-01 18:08:45,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:45,434 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 7518 transitions. [2022-03-01 18:08:45,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:45,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 7518 transitions. [2022-03-01 18:08:45,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:08:45,439 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:45,439 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:45,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-01 18:08:45,655 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,SelfDestructingSolverStorable17 [2022-03-01 18:08:45,656 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:45,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:45,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1017584555, now seen corresponding path program 11 times [2022-03-01 18:08:45,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:45,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263908703] [2022-03-01 18:08:45,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:45,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:45,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:45,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:08:45,688 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:45,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263908703] [2022-03-01 18:08:45,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263908703] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:45,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205739296] [2022-03-01 18:08:45,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:08:45,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:45,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:45,689 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:08:45,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-01 18:08:45,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:08:45,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:08:45,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:08:45,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:45,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:08:45,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:45,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:08:45,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205739296] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:45,873 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:45,873 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-01 18:08:45,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212779368] [2022-03-01 18:08:45,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:45,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:08:45,875 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:45,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:08:45,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:08:45,875 INFO L87 Difference]: Start difference. First operand 1995 states and 7518 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:46,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:46,310 INFO L93 Difference]: Finished difference Result 4088 states and 14079 transitions. [2022-03-01 18:08:46,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 18:08:46,310 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:08:46,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:46,326 INFO L225 Difference]: With dead ends: 4088 [2022-03-01 18:08:46,326 INFO L226 Difference]: Without dead ends: 3536 [2022-03-01 18:08:46,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:08:46,327 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 220 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:46,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 107 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:08:46,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3536 states. [2022-03-01 18:08:46,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3536 to 2540. [2022-03-01 18:08:46,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2540 states, 2539 states have (on average 3.588814493895234) internal successors, (9112), 2539 states have internal predecessors, (9112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:46,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 9112 transitions. [2022-03-01 18:08:46,410 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 9112 transitions. Word has length 26 [2022-03-01 18:08:46,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:46,410 INFO L470 AbstractCegarLoop]: Abstraction has 2540 states and 9112 transitions. [2022-03-01 18:08:46,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:46,411 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 9112 transitions. [2022-03-01 18:08:46,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:08:46,416 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:46,416 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:46,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-01 18:08:46,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:46,632 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:46,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:46,632 INFO L85 PathProgramCache]: Analyzing trace with hash 226713273, now seen corresponding path program 12 times [2022-03-01 18:08:46,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:46,633 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982743084] [2022-03-01 18:08:46,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:46,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:46,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:46,670 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:46,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982743084] [2022-03-01 18:08:46,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982743084] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:46,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551887891] [2022-03-01 18:08:46,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:08:46,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:46,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:46,671 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:08:46,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-01 18:08:46,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:08:46,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:08:46,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:08:46,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:08:46,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:46,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:08:46,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551887891] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:46,778 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:46,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-01 18:08:46,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454157885] [2022-03-01 18:08:46,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:46,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:08:46,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:46,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:08:46,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:08:46,779 INFO L87 Difference]: Start difference. First operand 2540 states and 9112 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:46,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:46,979 INFO L93 Difference]: Finished difference Result 5012 states and 17668 transitions. [2022-03-01 18:08:46,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 18:08:46,979 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:08:46,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:46,997 INFO L225 Difference]: With dead ends: 5012 [2022-03-01 18:08:46,997 INFO L226 Difference]: Without dead ends: 4982 [2022-03-01 18:08:46,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-01 18:08:46,998 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 90 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:46,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 61 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:08:47,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4982 states. [2022-03-01 18:08:47,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4982 to 3891. [2022-03-01 18:08:47,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3891 states, 3890 states have (on average 3.6817480719794347) internal successors, (14322), 3890 states have internal predecessors, (14322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:47,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3891 states to 3891 states and 14322 transitions. [2022-03-01 18:08:47,185 INFO L78 Accepts]: Start accepts. Automaton has 3891 states and 14322 transitions. Word has length 28 [2022-03-01 18:08:47,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:47,185 INFO L470 AbstractCegarLoop]: Abstraction has 3891 states and 14322 transitions. [2022-03-01 18:08:47,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:47,186 INFO L276 IsEmpty]: Start isEmpty. Operand 3891 states and 14322 transitions. [2022-03-01 18:08:47,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:08:47,224 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:47,224 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:47,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-01 18:08:47,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:47,445 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:47,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:47,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1762243953, now seen corresponding path program 13 times [2022-03-01 18:08:47,446 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:47,446 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566115857] [2022-03-01 18:08:47,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:47,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:47,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:47,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:47,484 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:47,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566115857] [2022-03-01 18:08:47,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566115857] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:47,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760281713] [2022-03-01 18:08:47,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:08:47,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:47,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:47,485 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:08:47,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-01 18:08:47,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:47,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:08:47,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:47,563 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:08:47,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:47,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:08:47,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760281713] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:47,622 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:47,622 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-03-01 18:08:47,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17472185] [2022-03-01 18:08:47,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:47,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-01 18:08:47,622 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:47,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-01 18:08:47,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-01 18:08:47,623 INFO L87 Difference]: Start difference. First operand 3891 states and 14322 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:47,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:47,927 INFO L93 Difference]: Finished difference Result 9890 states and 33297 transitions. [2022-03-01 18:08:47,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 18:08:47,927 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:08:47,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:47,951 INFO L225 Difference]: With dead ends: 9890 [2022-03-01 18:08:47,951 INFO L226 Difference]: Without dead ends: 9836 [2022-03-01 18:08:47,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:08:47,952 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 199 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:47,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 131 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:08:47,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9836 states. [2022-03-01 18:08:48,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9836 to 6083. [2022-03-01 18:08:48,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6083 states, 6082 states have (on average 3.672640578756988) internal successors, (22337), 6082 states have internal predecessors, (22337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:48,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6083 states to 6083 states and 22337 transitions. [2022-03-01 18:08:48,229 INFO L78 Accepts]: Start accepts. Automaton has 6083 states and 22337 transitions. Word has length 28 [2022-03-01 18:08:48,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:48,230 INFO L470 AbstractCegarLoop]: Abstraction has 6083 states and 22337 transitions. [2022-03-01 18:08:48,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:48,230 INFO L276 IsEmpty]: Start isEmpty. Operand 6083 states and 22337 transitions. [2022-03-01 18:08:48,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:08:48,248 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:48,248 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:48,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-01 18:08:48,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:48,462 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:48,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:48,463 INFO L85 PathProgramCache]: Analyzing trace with hash 2006057489, now seen corresponding path program 14 times [2022-03-01 18:08:48,463 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:48,463 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264838497] [2022-03-01 18:08:48,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:48,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:48,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:48,493 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:48,493 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:48,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264838497] [2022-03-01 18:08:48,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264838497] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:48,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325465864] [2022-03-01 18:08:48,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:08:48,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:48,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:48,495 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:08:48,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-01 18:08:48,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:08:48,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:08:48,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:08:48,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:48,558 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:08:48,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:48,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:08:48,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325465864] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:48,654 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:48,654 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-01 18:08:48,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416079992] [2022-03-01 18:08:48,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:48,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:08:48,655 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:48,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:08:48,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:08:48,655 INFO L87 Difference]: Start difference. First operand 6083 states and 22337 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:48,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:48,777 INFO L93 Difference]: Finished difference Result 8194 states and 29343 transitions. [2022-03-01 18:08:48,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 18:08:48,778 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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 28 [2022-03-01 18:08:48,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:48,799 INFO L225 Difference]: With dead ends: 8194 [2022-03-01 18:08:48,800 INFO L226 Difference]: Without dead ends: 8152 [2022-03-01 18:08:48,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-01 18:08:48,800 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 61 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:48,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 74 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:08:48,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8152 states. [2022-03-01 18:08:48,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8152 to 7162. [2022-03-01 18:08:48,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7162 states, 7161 states have (on average 3.697807568775311) internal successors, (26480), 7161 states have internal predecessors, (26480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:49,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7162 states to 7162 states and 26480 transitions. [2022-03-01 18:08:49,029 INFO L78 Accepts]: Start accepts. Automaton has 7162 states and 26480 transitions. Word has length 28 [2022-03-01 18:08:49,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:49,029 INFO L470 AbstractCegarLoop]: Abstraction has 7162 states and 26480 transitions. [2022-03-01 18:08:49,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:49,029 INFO L276 IsEmpty]: Start isEmpty. Operand 7162 states and 26480 transitions. [2022-03-01 18:08:49,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:08:49,043 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:49,043 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:49,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-01 18:08:49,268 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,SelfDestructingSolverStorable21 [2022-03-01 18:08:49,269 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:49,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:49,269 INFO L85 PathProgramCache]: Analyzing trace with hash -753379127, now seen corresponding path program 15 times [2022-03-01 18:08:49,269 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:49,269 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107424890] [2022-03-01 18:08:49,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:49,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:49,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:49,351 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:49,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107424890] [2022-03-01 18:08:49,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107424890] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:49,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164789779] [2022-03-01 18:08:49,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:08:49,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:49,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:49,352 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:08:49,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-01 18:08:49,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 18:08:49,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:08:49,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:08:49,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:49,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:08:49,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:49,505 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:08:49,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164789779] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:49,506 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:49,506 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-03-01 18:08:49,506 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964564933] [2022-03-01 18:08:49,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:49,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:08:49,506 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:49,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:08:49,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:08:49,506 INFO L87 Difference]: Start difference. First operand 7162 states and 26480 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:49,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:49,848 INFO L93 Difference]: Finished difference Result 11815 states and 40319 transitions. [2022-03-01 18:08:49,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 18:08:49,848 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:08:49,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:49,909 INFO L225 Difference]: With dead ends: 11815 [2022-03-01 18:08:49,909 INFO L226 Difference]: Without dead ends: 11657 [2022-03-01 18:08:49,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:08:49,910 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 208 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:49,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 171 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:08:49,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11657 states. [2022-03-01 18:08:50,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11657 to 9193. [2022-03-01 18:08:50,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9193 states, 9192 states have (on average 3.609769364664926) internal successors, (33181), 9192 states have internal predecessors, (33181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:50,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9193 states to 9193 states and 33181 transitions. [2022-03-01 18:08:50,161 INFO L78 Accepts]: Start accepts. Automaton has 9193 states and 33181 transitions. Word has length 28 [2022-03-01 18:08:50,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:50,161 INFO L470 AbstractCegarLoop]: Abstraction has 9193 states and 33181 transitions. [2022-03-01 18:08:50,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:50,161 INFO L276 IsEmpty]: Start isEmpty. Operand 9193 states and 33181 transitions. [2022-03-01 18:08:50,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:08:50,178 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:50,178 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:50,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-01 18:08:50,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:50,396 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:50,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:50,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1894836115, now seen corresponding path program 16 times [2022-03-01 18:08:50,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:50,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256334243] [2022-03-01 18:08:50,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:50,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:50,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:50,713 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:50,713 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:50,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256334243] [2022-03-01 18:08:50,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256334243] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:50,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769845023] [2022-03-01 18:08:50,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:08:50,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:50,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:50,729 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:08:50,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-01 18:08:50,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:08:50,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:08:50,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:08:50,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:51,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:08:51,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-03-01 18:08:51,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-03-01 18:08:51,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-03-01 18:08:51,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-03-01 18:08:51,235 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:51,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:51,357 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:08:51,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 518 treesize of output 486 [2022-03-01 18:08:51,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:08:51,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:51,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:08:51,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:51,536 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:08:51,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 63 [2022-03-01 18:08:51,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:51,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:51,558 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:08:51,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 55 [2022-03-01 18:08:51,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:51,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:51,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:08:51,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-03-01 18:08:51,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:51,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:51,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:08:51,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:08:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:51,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769845023] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:51,786 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:51,786 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:08:51,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858662646] [2022-03-01 18:08:51,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:51,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:08:51,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:51,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:08:51,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:08:51,788 INFO L87 Difference]: Start difference. First operand 9193 states and 33181 transitions. Second operand has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:52,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:52,599 INFO L93 Difference]: Finished difference Result 12792 states and 45116 transitions. [2022-03-01 18:08:52,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 18:08:52,599 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 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 30 [2022-03-01 18:08:52,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:52,655 INFO L225 Difference]: With dead ends: 12792 [2022-03-01 18:08:52,655 INFO L226 Difference]: Without dead ends: 12771 [2022-03-01 18:08:52,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:08:52,656 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 224 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:52,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 200 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:08:52,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12771 states. [2022-03-01 18:08:52,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12771 to 9338. [2022-03-01 18:08:52,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9338 states, 9337 states have (on average 3.6080111384813107) internal successors, (33688), 9337 states have internal predecessors, (33688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:52,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9338 states to 9338 states and 33688 transitions. [2022-03-01 18:08:52,953 INFO L78 Accepts]: Start accepts. Automaton has 9338 states and 33688 transitions. Word has length 30 [2022-03-01 18:08:52,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:52,953 INFO L470 AbstractCegarLoop]: Abstraction has 9338 states and 33688 transitions. [2022-03-01 18:08:52,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:52,953 INFO L276 IsEmpty]: Start isEmpty. Operand 9338 states and 33688 transitions. [2022-03-01 18:08:52,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:08:52,974 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:52,974 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:52,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-01 18:08:53,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:53,191 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:53,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:53,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1216905027, now seen corresponding path program 17 times [2022-03-01 18:08:53,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:53,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906105764] [2022-03-01 18:08:53,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:53,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:53,446 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:53,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:53,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906105764] [2022-03-01 18:08:53,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906105764] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:53,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729082593] [2022-03-01 18:08:53,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:08:53,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:53,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:53,448 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:08:53,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-01 18:08:53,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:08:53,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:08:53,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:08:53,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:53,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:08:53,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:08:53,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:53,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:53,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-03-01 18:08:53,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:08:53,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:53,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:53,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-03-01 18:08:53,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:08:53,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 16 [2022-03-01 18:08:53,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-03-01 18:08:54,032 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:54,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:54,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:54,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:54,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 445 treesize of output 413 [2022-03-01 18:08:54,734 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:08:54,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 97 [2022-03-01 18:08:54,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:54,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:08:54,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 77 [2022-03-01 18:08:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:55,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729082593] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:55,233 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:55,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-03-01 18:08:55,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996545145] [2022-03-01 18:08:55,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:55,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 18:08:55,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:55,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 18:08:55,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:08:55,234 INFO L87 Difference]: Start difference. First operand 9338 states and 33688 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:56,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:56,566 INFO L93 Difference]: Finished difference Result 9951 states and 35487 transitions. [2022-03-01 18:08:56,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 18:08:56,567 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:08:56,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:56,587 INFO L225 Difference]: With dead ends: 9951 [2022-03-01 18:08:56,587 INFO L226 Difference]: Without dead ends: 9924 [2022-03-01 18:08:56,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 18:08:56,588 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 177 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 1300 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 632 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:56,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 322 Invalid, 1952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1300 Invalid, 0 Unknown, 632 Unchecked, 0.7s Time] [2022-03-01 18:08:56,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9924 states. [2022-03-01 18:08:56,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9924 to 9370. [2022-03-01 18:08:56,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9370 states, 9369 states have (on average 3.604653644999466) internal successors, (33772), 9369 states have internal predecessors, (33772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:56,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9370 states to 9370 states and 33772 transitions. [2022-03-01 18:08:56,804 INFO L78 Accepts]: Start accepts. Automaton has 9370 states and 33772 transitions. Word has length 30 [2022-03-01 18:08:56,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:56,804 INFO L470 AbstractCegarLoop]: Abstraction has 9370 states and 33772 transitions. [2022-03-01 18:08:56,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:56,804 INFO L276 IsEmpty]: Start isEmpty. Operand 9370 states and 33772 transitions. [2022-03-01 18:08:56,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:08:56,819 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:56,819 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:56,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-01 18:08:57,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:57,035 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:57,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:57,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1367781517, now seen corresponding path program 18 times [2022-03-01 18:08:57,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:57,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106788828] [2022-03-01 18:08:57,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:57,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:57,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:57,256 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:57,256 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:57,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106788828] [2022-03-01 18:08:57,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106788828] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:57,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77684905] [2022-03-01 18:08:57,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:08:57,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:57,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:57,257 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:08:57,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-01 18:08:57,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:08:57,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:08:57,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:08:57,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:57,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:08:57,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 18:08:57,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-03-01 18:08:57,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:57,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-03-01 18:08:57,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-03-01 18:08:57,680 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:57,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:57,832 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:08:57,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 614 treesize of output 582 [2022-03-01 18:08:57,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:08:57,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:57,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:08:58,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:58,069 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:08:58,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 63 [2022-03-01 18:08:58,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:58,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:58,090 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:08:58,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 55 [2022-03-01 18:08:58,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:58,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:58,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:08:58,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-03-01 18:08:58,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:58,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:08:58,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:08:58,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:08:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:58,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77684905] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:58,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:58,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:08:58,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419894945] [2022-03-01 18:08:58,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:58,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:08:58,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:58,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:08:58,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:08:58,284 INFO L87 Difference]: Start difference. First operand 9370 states and 33772 transitions. Second operand has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:59,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:59,390 INFO L93 Difference]: Finished difference Result 13421 states and 47075 transitions. [2022-03-01 18:08:59,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 18:08:59,391 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 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 30 [2022-03-01 18:08:59,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:59,429 INFO L225 Difference]: With dead ends: 13421 [2022-03-01 18:08:59,429 INFO L226 Difference]: Without dead ends: 13367 [2022-03-01 18:08:59,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:08:59,430 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 214 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:59,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 189 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:08:59,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13367 states. [2022-03-01 18:08:59,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13367 to 9537. [2022-03-01 18:08:59,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9537 states, 9536 states have (on average 3.606753355704698) internal successors, (34394), 9536 states have internal predecessors, (34394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:59,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9537 states to 9537 states and 34394 transitions. [2022-03-01 18:08:59,694 INFO L78 Accepts]: Start accepts. Automaton has 9537 states and 34394 transitions. Word has length 30 [2022-03-01 18:08:59,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:59,694 INFO L470 AbstractCegarLoop]: Abstraction has 9537 states and 34394 transitions. [2022-03-01 18:08:59,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:59,694 INFO L276 IsEmpty]: Start isEmpty. Operand 9537 states and 34394 transitions. [2022-03-01 18:08:59,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:08:59,714 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:59,714 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:08:59,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-01 18:08:59,930 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,SelfDestructingSolverStorable25 [2022-03-01 18:08:59,930 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:59,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:59,931 INFO L85 PathProgramCache]: Analyzing trace with hash 782322175, now seen corresponding path program 19 times [2022-03-01 18:08:59,931 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:59,931 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121008282] [2022-03-01 18:08:59,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:59,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:09:00,237 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:00,237 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:09:00,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121008282] [2022-03-01 18:09:00,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121008282] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:09:00,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960195346] [2022-03-01 18:09:00,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:09:00,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:09:00,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:09:00,241 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:09:00,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-01 18:09:00,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:09:00,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:09:00,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:09:00,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:09:00,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:00,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:00,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2022-03-01 18:09:00,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 18:09:00,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-03-01 18:09:00,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-03-01 18:09:00,668 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:00,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:09:00,776 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:09:00,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 614 treesize of output 582 [2022-03-01 18:09:00,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:00,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:00,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:00,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:00,925 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:09:00,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 63 [2022-03-01 18:09:00,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:00,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:00,946 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:09:00,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 55 [2022-03-01 18:09:01,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:01,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:01,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:01,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-03-01 18:09:01,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:01,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:01,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:01,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:09:01,096 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:01,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960195346] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:09:01,096 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:09:01,096 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2022-03-01 18:09:01,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058792914] [2022-03-01 18:09:01,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:09:01,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:09:01,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:09:01,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:09:01,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:09:01,101 INFO L87 Difference]: Start difference. First operand 9537 states and 34394 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:09:02,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:09:02,406 INFO L93 Difference]: Finished difference Result 13632 states and 47787 transitions. [2022-03-01 18:09:02,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 18:09:02,407 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 30 [2022-03-01 18:09:02,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:09:02,451 INFO L225 Difference]: With dead ends: 13632 [2022-03-01 18:09:02,451 INFO L226 Difference]: Without dead ends: 13611 [2022-03-01 18:09:02,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 18:09:02,452 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 194 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1619 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:09:02,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 347 Invalid, 1660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1619 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 18:09:02,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13611 states. [2022-03-01 18:09:02,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13611 to 9566. [2022-03-01 18:09:02,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9566 states, 9565 states have (on average 3.6065865133298485) internal successors, (34497), 9565 states have internal predecessors, (34497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:09:02,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9566 states to 9566 states and 34497 transitions. [2022-03-01 18:09:02,818 INFO L78 Accepts]: Start accepts. Automaton has 9566 states and 34497 transitions. Word has length 30 [2022-03-01 18:09:02,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:09:02,819 INFO L470 AbstractCegarLoop]: Abstraction has 9566 states and 34497 transitions. [2022-03-01 18:09:02,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:09:02,823 INFO L276 IsEmpty]: Start isEmpty. Operand 9566 states and 34497 transitions. [2022-03-01 18:09:02,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:09:02,837 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:09:02,837 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:09:02,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-01 18:09:03,048 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,SelfDestructingSolverStorable26 [2022-03-01 18:09:03,049 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:09:03,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:09:03,050 INFO L85 PathProgramCache]: Analyzing trace with hash -336473117, now seen corresponding path program 20 times [2022-03-01 18:09:03,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:09:03,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929921919] [2022-03-01 18:09:03,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:09:03,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:09:03,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:09:03,355 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:03,356 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:09:03,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929921919] [2022-03-01 18:09:03,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929921919] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:09:03,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175876718] [2022-03-01 18:09:03,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:09:03,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:09:03,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:09:03,357 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:09:03,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-01 18:09:03,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:09:03,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:09:03,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:09:03,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:09:03,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:09:03,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:03,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:03,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2022-03-01 18:09:03,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-03-01 18:09:03,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-03-01 18:09:03,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:09:03,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:03,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:09:03,800 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:09:03,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 614 treesize of output 582 [2022-03-01 18:09:03,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:03,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:03,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:03,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:03,943 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:09:03,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 63 [2022-03-01 18:09:03,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:03,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:03,964 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:09:03,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 55 [2022-03-01 18:09:04,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:04,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:04,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:04,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-03-01 18:09:04,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:04,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:04,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:04,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:09:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:04,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175876718] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:09:04,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:09:04,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2022-03-01 18:09:04,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598158298] [2022-03-01 18:09:04,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:09:04,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:09:04,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:09:04,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:09:04,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:09:04,138 INFO L87 Difference]: Start difference. First operand 9566 states and 34497 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:09:05,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:09:05,385 INFO L93 Difference]: Finished difference Result 13438 states and 47172 transitions. [2022-03-01 18:09:05,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 18:09:05,386 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:09:05,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:09:05,423 INFO L225 Difference]: With dead ends: 13438 [2022-03-01 18:09:05,423 INFO L226 Difference]: Without dead ends: 13417 [2022-03-01 18:09:05,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=223, Invalid=1417, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 18:09:05,427 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 205 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1886 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:09:05,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 352 Invalid, 1930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1886 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 18:09:05,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13417 states. [2022-03-01 18:09:05,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13417 to 9556. [2022-03-01 18:09:05,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9556 states, 9555 states have (on average 3.6063840920983776) internal successors, (34459), 9555 states have internal predecessors, (34459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:09:05,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9556 states to 9556 states and 34459 transitions. [2022-03-01 18:09:05,751 INFO L78 Accepts]: Start accepts. Automaton has 9556 states and 34459 transitions. Word has length 30 [2022-03-01 18:09:05,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:09:05,751 INFO L470 AbstractCegarLoop]: Abstraction has 9556 states and 34459 transitions. [2022-03-01 18:09:05,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:09:05,751 INFO L276 IsEmpty]: Start isEmpty. Operand 9556 states and 34459 transitions. [2022-03-01 18:09:05,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:09:05,766 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:09:05,766 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:09:05,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-01 18:09:05,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-01 18:09:05,971 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:09:05,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:09:05,972 INFO L85 PathProgramCache]: Analyzing trace with hash 418455901, now seen corresponding path program 21 times [2022-03-01 18:09:05,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:09:05,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859925042] [2022-03-01 18:09:05,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:09:05,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:09:05,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:09:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:06,183 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:09:06,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859925042] [2022-03-01 18:09:06,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859925042] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:09:06,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773945839] [2022-03-01 18:09:06,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:09:06,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:09:06,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:09:06,185 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:09:06,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-01 18:09:06,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:09:06,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:09:06,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:09:06,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:09:06,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:09:06,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:09:06,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 41 [2022-03-01 18:09:06,465 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:09:06,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 61 [2022-03-01 18:09:06,473 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-01 18:09:06,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-01 18:09:06,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:06,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:09:06,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-03-01 18:09:06,744 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:06,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:09:07,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:07,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 109 [2022-03-01 18:09:07,422 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:09:07,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 98 [2022-03-01 18:09:07,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:07,446 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:09:07,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 78 [2022-03-01 18:09:07,839 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:07,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773945839] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:09:07,839 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:09:07,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-03-01 18:09:07,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066860884] [2022-03-01 18:09:07,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:09:07,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:09:07,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:09:07,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:09:07,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:09:07,840 INFO L87 Difference]: Start difference. First operand 9556 states and 34459 transitions. Second operand has 28 states, 28 states have (on average 2.75) internal successors, (77), 27 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) [2022-03-01 18:09:12,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:09:12,762 INFO L93 Difference]: Finished difference Result 20722 states and 72136 transitions. [2022-03-01 18:09:12,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-01 18:09:12,762 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.75) internal successors, (77), 27 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 30 [2022-03-01 18:09:12,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:09:12,823 INFO L225 Difference]: With dead ends: 20722 [2022-03-01 18:09:12,823 INFO L226 Difference]: Without dead ends: 20668 [2022-03-01 18:09:12,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3576 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1107, Invalid=9813, Unknown=0, NotChecked=0, Total=10920 [2022-03-01 18:09:12,826 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 590 mSDsluCounter, 1750 mSDsCounter, 0 mSdLazyCounter, 2765 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 5299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2451 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:09:12,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 851 Invalid, 5299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2765 Invalid, 0 Unknown, 2451 Unchecked, 1.5s Time] [2022-03-01 18:09:12,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20668 states. [2022-03-01 18:09:13,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20668 to 9634. [2022-03-01 18:09:13,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9634 states, 9633 states have (on average 3.6039655351396243) internal successors, (34717), 9633 states have internal predecessors, (34717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:09:13,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9634 states to 9634 states and 34717 transitions. [2022-03-01 18:09:13,115 INFO L78 Accepts]: Start accepts. Automaton has 9634 states and 34717 transitions. Word has length 30 [2022-03-01 18:09:13,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:09:13,115 INFO L470 AbstractCegarLoop]: Abstraction has 9634 states and 34717 transitions. [2022-03-01 18:09:13,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.75) internal successors, (77), 27 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) [2022-03-01 18:09:13,115 INFO L276 IsEmpty]: Start isEmpty. Operand 9634 states and 34717 transitions. [2022-03-01 18:09:13,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:09:13,131 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:09:13,131 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:09:13,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-01 18:09:13,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:09:13,347 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:09:13,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:09:13,347 INFO L85 PathProgramCache]: Analyzing trace with hash 2138468893, now seen corresponding path program 22 times [2022-03-01 18:09:13,347 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:09:13,347 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909176425] [2022-03-01 18:09:13,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:09:13,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:09:13,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:09:13,607 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:13,607 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:09:13,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909176425] [2022-03-01 18:09:13,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909176425] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:09:13,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103130344] [2022-03-01 18:09:13,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:09:13,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:09:13,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:09:13,609 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:09:13,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-01 18:09:13,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:09:13,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:09:13,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:09:13,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:09:13,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:09:13,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-03-01 18:09:13,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-03-01 18:09:13,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 16 [2022-03-01 18:09:13,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-03-01 18:09:13,990 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:13,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:09:14,159 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:09:14,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2390 treesize of output 2294 [2022-03-01 18:09:14,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:14,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:14,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:14,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:14,798 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:09:14,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 63 [2022-03-01 18:09:14,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:14,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:14,816 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:09:14,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 55 [2022-03-01 18:09:14,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:14,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:14,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:14,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-03-01 18:09:14,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:14,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:14,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:14,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:09:14,956 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:14,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103130344] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:09:14,956 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:09:14,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:09:14,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581666189] [2022-03-01 18:09:14,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:09:14,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:09:14,956 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:09:14,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:09:14,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:09:14,957 INFO L87 Difference]: Start difference. First operand 9634 states and 34717 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:09:16,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:09:16,115 INFO L93 Difference]: Finished difference Result 13699 states and 47972 transitions. [2022-03-01 18:09:16,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 18:09:16,115 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:09:16,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:09:16,145 INFO L225 Difference]: With dead ends: 13699 [2022-03-01 18:09:16,145 INFO L226 Difference]: Without dead ends: 13656 [2022-03-01 18:09:16,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 18:09:16,146 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 209 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 1364 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:09:16,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 287 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1364 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:09:16,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13656 states. [2022-03-01 18:09:16,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13656 to 9867. [2022-03-01 18:09:16,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9867 states, 9866 states have (on average 3.5997364686803164) internal successors, (35515), 9866 states have internal predecessors, (35515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:09:16,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9867 states to 9867 states and 35515 transitions. [2022-03-01 18:09:16,356 INFO L78 Accepts]: Start accepts. Automaton has 9867 states and 35515 transitions. Word has length 30 [2022-03-01 18:09:16,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:09:16,356 INFO L470 AbstractCegarLoop]: Abstraction has 9867 states and 35515 transitions. [2022-03-01 18:09:16,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:09:16,356 INFO L276 IsEmpty]: Start isEmpty. Operand 9867 states and 35515 transitions. [2022-03-01 18:09:16,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:09:16,373 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:09:16,373 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:09:16,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-01 18:09:16,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:09:16,589 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:09:16,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:09:16,589 INFO L85 PathProgramCache]: Analyzing trace with hash -586467713, now seen corresponding path program 23 times [2022-03-01 18:09:16,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:09:16,590 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218831588] [2022-03-01 18:09:16,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:09:16,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:09:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:09:16,973 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:16,974 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:09:16,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218831588] [2022-03-01 18:09:16,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218831588] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:09:16,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537651686] [2022-03-01 18:09:16,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:09:16,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:09:16,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:09:16,975 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:09:16,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-01 18:09:17,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-01 18:09:17,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:09:17,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-01 18:09:17,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:09:17,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:09:17,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:17,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-01 18:09:17,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:17,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:17,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:17,574 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:09:17,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 63 [2022-03-01 18:09:17,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:17,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:17,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:17,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:17,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 22 [2022-03-01 18:09:17,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:17,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:17,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:17,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:17,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-03-01 18:09:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:17,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:09:18,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:18,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:18,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:18,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:18,243 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:09:18,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 77 treesize of output 90 [2022-03-01 18:09:18,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:18,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:18,262 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:09:18,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 53 treesize of output 70 [2022-03-01 18:09:18,496 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:18,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537651686] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:09:18,496 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:09:18,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-01 18:09:18,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253854865] [2022-03-01 18:09:18,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:09:18,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 18:09:18,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:09:18,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 18:09:18,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:09:18,497 INFO L87 Difference]: Start difference. First operand 9867 states and 35515 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:09:27,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:09:27,347 INFO L93 Difference]: Finished difference Result 21914 states and 76487 transitions. [2022-03-01 18:09:27,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-03-01 18:09:27,347 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:09:27,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:09:27,407 INFO L225 Difference]: With dead ends: 21914 [2022-03-01 18:09:27,407 INFO L226 Difference]: Without dead ends: 21875 [2022-03-01 18:09:27,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7848 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=2494, Invalid=18676, Unknown=0, NotChecked=0, Total=21170 [2022-03-01 18:09:27,412 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 487 mSDsluCounter, 1972 mSDsCounter, 0 mSdLazyCounter, 2846 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 6896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3947 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:09:27,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 876 Invalid, 6896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2846 Invalid, 0 Unknown, 3947 Unchecked, 1.5s Time] [2022-03-01 18:09:27,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21875 states. [2022-03-01 18:09:27,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21875 to 10145. [2022-03-01 18:09:27,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10145 states, 10144 states have (on average 3.597594637223975) internal successors, (36494), 10144 states have internal predecessors, (36494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:09:27,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10145 states to 10145 states and 36494 transitions. [2022-03-01 18:09:27,702 INFO L78 Accepts]: Start accepts. Automaton has 10145 states and 36494 transitions. Word has length 30 [2022-03-01 18:09:27,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:09:27,702 INFO L470 AbstractCegarLoop]: Abstraction has 10145 states and 36494 transitions. [2022-03-01 18:09:27,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:09:27,702 INFO L276 IsEmpty]: Start isEmpty. Operand 10145 states and 36494 transitions. [2022-03-01 18:09:27,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:09:27,719 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:09:27,719 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:09:27,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-01 18:09:27,935 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,SelfDestructingSolverStorable30 [2022-03-01 18:09:27,936 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:09:27,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:09:27,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1705263005, now seen corresponding path program 24 times [2022-03-01 18:09:27,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:09:27,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751572102] [2022-03-01 18:09:27,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:09:27,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:09:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:09:28,203 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:28,203 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:09:28,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751572102] [2022-03-01 18:09:28,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751572102] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:09:28,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024596190] [2022-03-01 18:09:28,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:09:28,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:09:28,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:09:28,205 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:09:28,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-01 18:09:28,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-01 18:09:28,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:09:28,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:09:28,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:09:28,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:09:28,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-03-01 18:09:28,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-03-01 18:09:28,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-03-01 18:09:28,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:09:28,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2022-03-01 18:09:28,831 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:28,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:09:29,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:29,375 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:09:29,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1149 treesize of output 1110 [2022-03-01 18:09:30,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:30,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:30,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:30,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:30,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-03-01 18:09:30,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:30,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:30,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:30,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:30,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:09:30,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:30,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:30,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:30,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:30,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 58 [2022-03-01 18:09:30,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:30,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:30,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:09:30,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:09:30,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 28 [2022-03-01 18:09:30,323 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-03-01 18:09:30,423 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:30,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024596190] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:09:30,424 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:09:30,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 30 [2022-03-01 18:09:30,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605419211] [2022-03-01 18:09:30,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:09:30,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:09:30,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:09:30,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:09:30,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:09:30,425 INFO L87 Difference]: Start difference. First operand 10145 states and 36494 transitions. Second operand has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:09:56,134 WARN L228 SmtUtils]: Spent 6.10s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-01 18:10:06,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:10:06,385 INFO L93 Difference]: Finished difference Result 25914 states and 90193 transitions. [2022-03-01 18:10:06,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2022-03-01 18:10:06,386 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 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 30 [2022-03-01 18:10:06,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:10:06,448 INFO L225 Difference]: With dead ends: 25914 [2022-03-01 18:10:06,448 INFO L226 Difference]: Without dead ends: 25884 [2022-03-01 18:10:06,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 47 SyntacticMatches, 8 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13957 ImplicationChecksByTransitivity, 35.1s TimeCoverageRelationStatistics Valid=3729, Invalid=31802, Unknown=1, NotChecked=0, Total=35532 [2022-03-01 18:10:06,455 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 573 mSDsluCounter, 2056 mSDsCounter, 0 mSdLazyCounter, 1814 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 6627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4690 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:10:06,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 776 Invalid, 6627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1814 Invalid, 0 Unknown, 4690 Unchecked, 1.1s Time] [2022-03-01 18:10:06,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25884 states. [2022-03-01 18:10:06,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25884 to 10509. [2022-03-01 18:10:06,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10509 states, 10508 states have (on average 3.586410354015988) internal successors, (37686), 10508 states have internal predecessors, (37686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:06,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10509 states to 10509 states and 37686 transitions. [2022-03-01 18:10:06,821 INFO L78 Accepts]: Start accepts. Automaton has 10509 states and 37686 transitions. Word has length 30 [2022-03-01 18:10:06,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:10:06,821 INFO L470 AbstractCegarLoop]: Abstraction has 10509 states and 37686 transitions. [2022-03-01 18:10:06,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:06,821 INFO L276 IsEmpty]: Start isEmpty. Operand 10509 states and 37686 transitions. [2022-03-01 18:10:06,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:10:06,838 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:10:06,838 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:10:06,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-01 18:10:07,053 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,SelfDestructingSolverStorable31 [2022-03-01 18:10:07,053 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:10:07,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:10:07,054 INFO L85 PathProgramCache]: Analyzing trace with hash 66333555, now seen corresponding path program 25 times [2022-03-01 18:10:07,054 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:10:07,054 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262783224] [2022-03-01 18:10:07,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:10:07,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:10:07,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:10:07,326 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:07,326 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:10:07,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262783224] [2022-03-01 18:10:07,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262783224] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:10:07,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064518667] [2022-03-01 18:10:07,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:10:07,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:07,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:10:07,327 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:10:07,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-01 18:10:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:10:07,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:10:07,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:10:07,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:10:07,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:07,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-01 18:10:07,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-03-01 18:10:07,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-03-01 18:10:07,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-03-01 18:10:07,788 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:07,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:10:07,880 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:10:07,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2390 treesize of output 2294 [2022-03-01 18:10:08,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:08,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:08,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:08,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:08,546 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:10:08,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 63 [2022-03-01 18:10:08,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:08,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:08,566 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:10:08,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 55 [2022-03-01 18:10:08,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:08,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:08,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:08,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-03-01 18:10:08,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:08,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:08,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:08,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:10:08,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:08,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064518667] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:10:08,731 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:10:08,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2022-03-01 18:10:08,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555275310] [2022-03-01 18:10:08,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:10:08,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:10:08,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:10:08,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:10:08,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:10:08,732 INFO L87 Difference]: Start difference. First operand 10509 states and 37686 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:10,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:10:10,119 INFO L93 Difference]: Finished difference Result 14830 states and 51892 transitions. [2022-03-01 18:10:10,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 18:10:10,119 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:10:10,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:10:10,155 INFO L225 Difference]: With dead ends: 14830 [2022-03-01 18:10:10,155 INFO L226 Difference]: Without dead ends: 14791 [2022-03-01 18:10:10,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 18:10:10,156 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 177 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 1686 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:10:10,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 388 Invalid, 1731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1686 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 18:10:10,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14791 states. [2022-03-01 18:10:10,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14791 to 10482. [2022-03-01 18:10:10,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10482 states, 10481 states have (on average 3.5968896097700602) internal successors, (37699), 10481 states have internal predecessors, (37699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:10,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10482 states to 10482 states and 37699 transitions. [2022-03-01 18:10:10,356 INFO L78 Accepts]: Start accepts. Automaton has 10482 states and 37699 transitions. Word has length 30 [2022-03-01 18:10:10,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:10:10,356 INFO L470 AbstractCegarLoop]: Abstraction has 10482 states and 37699 transitions. [2022-03-01 18:10:10,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:10,356 INFO L276 IsEmpty]: Start isEmpty. Operand 10482 states and 37699 transitions. [2022-03-01 18:10:10,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:10:10,372 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:10:10,372 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:10:10,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-01 18:10:10,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:10,579 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:10:10,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:10:10,579 INFO L85 PathProgramCache]: Analyzing trace with hash 639992413, now seen corresponding path program 26 times [2022-03-01 18:10:10,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:10:10,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641117925] [2022-03-01 18:10:10,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:10:10,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:10:10,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:10:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:10,884 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:10:10,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641117925] [2022-03-01 18:10:10,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641117925] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:10:10,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513131970] [2022-03-01 18:10:10,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:10:10,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:10,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:10:10,886 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:10:10,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-01 18:10:10,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:10:10,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:10:10,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:10:10,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:10:11,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:10:11,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-03-01 18:10:11,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-03-01 18:10:11,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-03-01 18:10:11,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-03-01 18:10:11,302 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:11,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:10:11,438 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:10:11,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2390 treesize of output 2294 [2022-03-01 18:10:12,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:12,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:12,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:12,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:12,562 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:10:12,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 63 [2022-03-01 18:10:12,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:12,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:12,586 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:10:12,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 55 [2022-03-01 18:10:12,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:12,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:12,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:12,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-03-01 18:10:12,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:12,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:12,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:12,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:10:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:12,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513131970] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:10:12,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:10:12,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2022-03-01 18:10:12,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970026159] [2022-03-01 18:10:12,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:10:12,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:10:12,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:10:12,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:10:12,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:10:12,753 INFO L87 Difference]: Start difference. First operand 10482 states and 37699 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:13,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:10:13,956 INFO L93 Difference]: Finished difference Result 14320 states and 50335 transitions. [2022-03-01 18:10:13,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 18:10:13,956 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:10:13,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:10:13,987 INFO L225 Difference]: With dead ends: 14320 [2022-03-01 18:10:13,987 INFO L226 Difference]: Without dead ends: 14281 [2022-03-01 18:10:13,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:10:13,990 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 171 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 1764 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:10:13,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 395 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1764 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 18:10:14,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14281 states. [2022-03-01 18:10:14,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14281 to 10505. [2022-03-01 18:10:14,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10505 states, 10504 states have (on average 3.598153084539223) internal successors, (37795), 10504 states have internal predecessors, (37795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:14,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10505 states to 10505 states and 37795 transitions. [2022-03-01 18:10:14,176 INFO L78 Accepts]: Start accepts. Automaton has 10505 states and 37795 transitions. Word has length 30 [2022-03-01 18:10:14,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:10:14,176 INFO L470 AbstractCegarLoop]: Abstraction has 10505 states and 37795 transitions. [2022-03-01 18:10:14,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:14,176 INFO L276 IsEmpty]: Start isEmpty. Operand 10505 states and 37795 transitions. [2022-03-01 18:10:14,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:10:14,192 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:10:14,192 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:10:14,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-01 18:10:14,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:14,407 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:10:14,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:10:14,407 INFO L85 PathProgramCache]: Analyzing trace with hash -35543505, now seen corresponding path program 27 times [2022-03-01 18:10:14,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:10:14,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321716457] [2022-03-01 18:10:14,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:10:14,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:10:14,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:10:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:14,614 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:10:14,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321716457] [2022-03-01 18:10:14,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321716457] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:10:14,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965902893] [2022-03-01 18:10:14,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:10:14,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:14,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:10:14,615 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:10:14,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-01 18:10:14,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:10:14,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:10:14,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:10:14,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:10:14,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:10:15,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-03-01 18:10:15,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-03-01 18:10:15,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-03-01 18:10:15,112 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:10:15,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-03-01 18:10:15,225 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:15,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:10:15,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:15,886 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:10:15,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 124 treesize of output 133 [2022-03-01 18:10:15,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:15,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:15,904 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:10:15,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 96 treesize of output 109 [2022-03-01 18:10:15,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:15,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:15,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 77 [2022-03-01 18:10:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:16,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965902893] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:10:16,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:10:16,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2022-03-01 18:10:16,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259187453] [2022-03-01 18:10:16,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:10:16,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 18:10:16,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:10:16,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 18:10:16,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:10:16,163 INFO L87 Difference]: Start difference. First operand 10505 states and 37795 transitions. Second operand has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 28 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:18,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:10:18,763 INFO L93 Difference]: Finished difference Result 19262 states and 66696 transitions. [2022-03-01 18:10:18,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-01 18:10:18,763 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 28 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:10:18,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:10:18,812 INFO L225 Difference]: With dead ends: 19262 [2022-03-01 18:10:18,812 INFO L226 Difference]: Without dead ends: 19205 [2022-03-01 18:10:18,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1677 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=597, Invalid=5409, Unknown=0, NotChecked=0, Total=6006 [2022-03-01 18:10:18,813 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 324 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 1861 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 3154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1241 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:10:18,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 600 Invalid, 3154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1861 Invalid, 0 Unknown, 1241 Unchecked, 0.9s Time] [2022-03-01 18:10:18,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19205 states. [2022-03-01 18:10:19,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19205 to 10656. [2022-03-01 18:10:19,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10656 states, 10655 states have (on average 3.596433599249179) internal successors, (38320), 10655 states have internal predecessors, (38320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:19,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10656 states to 10656 states and 38320 transitions. [2022-03-01 18:10:19,044 INFO L78 Accepts]: Start accepts. Automaton has 10656 states and 38320 transitions. Word has length 30 [2022-03-01 18:10:19,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:10:19,044 INFO L470 AbstractCegarLoop]: Abstraction has 10656 states and 38320 transitions. [2022-03-01 18:10:19,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 28 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:19,044 INFO L276 IsEmpty]: Start isEmpty. Operand 10656 states and 38320 transitions. [2022-03-01 18:10:19,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:10:19,060 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:10:19,060 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:10:19,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-01 18:10:19,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:19,273 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:10:19,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:10:19,274 INFO L85 PathProgramCache]: Analyzing trace with hash 2114560187, now seen corresponding path program 28 times [2022-03-01 18:10:19,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:10:19,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537078608] [2022-03-01 18:10:19,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:10:19,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:10:19,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:10:19,445 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:19,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:10:19,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537078608] [2022-03-01 18:10:19,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537078608] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:10:19,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242120759] [2022-03-01 18:10:19,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:10:19,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:19,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:10:19,447 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:10:19,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-01 18:10:19,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:10:19,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:10:19,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:10:19,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:10:19,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:10:19,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:19,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2022-03-01 18:10:19,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:19,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-03-01 18:10:19,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-03-01 18:10:19,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-03-01 18:10:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:19,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:10:20,018 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:10:20,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 86 [2022-03-01 18:10:20,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:20,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:20,036 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:10:20,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 76 [2022-03-01 18:10:20,043 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:10:20,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 198 [2022-03-01 18:10:20,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:20,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:20,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:20,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-03-01 18:10:20,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:20,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:20,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:20,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-03-01 18:10:20,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:20,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:20,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:20,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242120759] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:10:20,216 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:10:20,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-01 18:10:20,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449198980] [2022-03-01 18:10:20,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:10:20,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 18:10:20,217 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:10:20,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 18:10:20,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:10:20,217 INFO L87 Difference]: Start difference. First operand 10656 states and 38320 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:21,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:10:21,604 INFO L93 Difference]: Finished difference Result 16958 states and 60208 transitions. [2022-03-01 18:10:21,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 18:10:21,604 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:10:21,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:10:21,650 INFO L225 Difference]: With dead ends: 16958 [2022-03-01 18:10:21,650 INFO L226 Difference]: Without dead ends: 16880 [2022-03-01 18:10:21,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=409, Invalid=1571, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 18:10:21,651 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 322 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:10:21,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 189 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:10:21,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16880 states. [2022-03-01 18:10:21,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16880 to 10813. [2022-03-01 18:10:21,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10813 states, 10812 states have (on average 3.5926748057713653) internal successors, (38844), 10812 states have internal predecessors, (38844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:21,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10813 states to 10813 states and 38844 transitions. [2022-03-01 18:10:21,874 INFO L78 Accepts]: Start accepts. Automaton has 10813 states and 38844 transitions. Word has length 30 [2022-03-01 18:10:21,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:10:21,875 INFO L470 AbstractCegarLoop]: Abstraction has 10813 states and 38844 transitions. [2022-03-01 18:10:21,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:21,875 INFO L276 IsEmpty]: Start isEmpty. Operand 10813 states and 38844 transitions. [2022-03-01 18:10:21,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:10:21,892 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:10:21,892 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:10:21,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-01 18:10:22,108 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,SelfDestructingSolverStorable35 [2022-03-01 18:10:22,109 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:10:22,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:10:22,109 INFO L85 PathProgramCache]: Analyzing trace with hash 995764895, now seen corresponding path program 29 times [2022-03-01 18:10:22,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:10:22,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057138300] [2022-03-01 18:10:22,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:10:22,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:10:22,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:10:22,334 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:22,334 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:10:22,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057138300] [2022-03-01 18:10:22,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057138300] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:10:22,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046598876] [2022-03-01 18:10:22,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:10:22,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:22,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:10:22,335 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:10:22,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-01 18:10:22,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 18:10:22,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:10:22,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-01 18:10:22,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:10:22,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:10:22,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:22,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2022-03-01 18:10:22,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:22,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 49 [2022-03-01 18:10:22,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:22,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-03-01 18:10:22,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-03-01 18:10:22,901 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:22,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:10:23,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:23,127 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:10:23,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 86 [2022-03-01 18:10:23,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:23,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:23,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:10:23,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 76 [2022-03-01 18:10:23,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:23,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:23,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:23,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:23,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:23,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:23,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-03-01 18:10:23,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:23,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:23,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:23,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-03-01 18:10:23,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:23,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:23,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:23,355 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:23,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046598876] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:10:23,355 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:10:23,355 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-03-01 18:10:23,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200776731] [2022-03-01 18:10:23,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:10:23,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:10:23,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:10:23,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:10:23,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:10:23,356 INFO L87 Difference]: Start difference. First operand 10813 states and 38844 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:29,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:10:29,172 INFO L93 Difference]: Finished difference Result 20992 states and 73014 transitions. [2022-03-01 18:10:29,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-01 18:10:29,172 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:10:29,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:10:29,224 INFO L225 Difference]: With dead ends: 20992 [2022-03-01 18:10:29,224 INFO L226 Difference]: Without dead ends: 20938 [2022-03-01 18:10:29,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4448 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1917, Invalid=10293, Unknown=0, NotChecked=0, Total=12210 [2022-03-01 18:10:29,229 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 462 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 2596 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 3055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 330 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:10:29,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 424 Invalid, 3055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2596 Invalid, 0 Unknown, 330 Unchecked, 1.5s Time] [2022-03-01 18:10:29,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20938 states. [2022-03-01 18:10:29,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20938 to 11234. [2022-03-01 18:10:29,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11234 states, 11233 states have (on average 3.589958158995816) internal successors, (40326), 11233 states have internal predecessors, (40326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:29,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11234 states to 11234 states and 40326 transitions. [2022-03-01 18:10:29,490 INFO L78 Accepts]: Start accepts. Automaton has 11234 states and 40326 transitions. Word has length 30 [2022-03-01 18:10:29,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:10:29,490 INFO L470 AbstractCegarLoop]: Abstraction has 11234 states and 40326 transitions. [2022-03-01 18:10:29,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:29,490 INFO L276 IsEmpty]: Start isEmpty. Operand 11234 states and 40326 transitions. [2022-03-01 18:10:29,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:10:29,508 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:10:29,508 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:10:29,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-01 18:10:29,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-01 18:10:29,724 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:10:29,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:10:29,724 INFO L85 PathProgramCache]: Analyzing trace with hash -382774213, now seen corresponding path program 30 times [2022-03-01 18:10:29,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:10:29,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264263693] [2022-03-01 18:10:29,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:10:29,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:10:29,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:10:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:29,946 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:10:29,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264263693] [2022-03-01 18:10:29,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264263693] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:10:29,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710113079] [2022-03-01 18:10:29,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:10:29,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:29,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:10:29,948 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:10:29,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-01 18:10:29,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 18:10:29,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:10:29,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:10:29,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:10:30,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:10:30,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:30,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2022-03-01 18:10:30,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:30,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2022-03-01 18:10:30,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-01 18:10:30,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-03-01 18:10:30,373 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:30,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:10:30,529 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:10:30,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 86 [2022-03-01 18:10:30,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:30,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:30,545 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:10:30,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 76 [2022-03-01 18:10:30,551 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:10:30,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 478 treesize of output 446 [2022-03-01 18:10:30,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:30,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:30,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:30,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-03-01 18:10:30,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:30,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:30,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:30,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-03-01 18:10:30,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:30,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:30,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:30,769 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:30,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710113079] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:10:30,770 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:10:30,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-01 18:10:30,770 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446162451] [2022-03-01 18:10:30,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:10:30,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 18:10:30,770 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:10:30,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 18:10:30,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:10:30,771 INFO L87 Difference]: Start difference. First operand 11234 states and 40326 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:32,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:10:32,685 INFO L93 Difference]: Finished difference Result 18303 states and 64746 transitions. [2022-03-01 18:10:32,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 18:10:32,685 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:10:32,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:10:32,726 INFO L225 Difference]: With dead ends: 18303 [2022-03-01 18:10:32,726 INFO L226 Difference]: Without dead ends: 18282 [2022-03-01 18:10:32,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=296, Invalid=1866, Unknown=0, NotChecked=0, Total=2162 [2022-03-01 18:10:32,726 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 254 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:10:32,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 256 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1437 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 18:10:32,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18282 states. [2022-03-01 18:10:32,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18282 to 11276. [2022-03-01 18:10:32,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11276 states, 11275 states have (on average 3.5881152993348113) internal successors, (40456), 11275 states have internal predecessors, (40456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:32,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11276 states to 11276 states and 40456 transitions. [2022-03-01 18:10:32,959 INFO L78 Accepts]: Start accepts. Automaton has 11276 states and 40456 transitions. Word has length 30 [2022-03-01 18:10:32,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:10:32,959 INFO L470 AbstractCegarLoop]: Abstraction has 11276 states and 40456 transitions. [2022-03-01 18:10:32,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:32,959 INFO L276 IsEmpty]: Start isEmpty. Operand 11276 states and 40456 transitions. [2022-03-01 18:10:32,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:10:32,977 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:10:32,977 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:10:33,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-01 18:10:33,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-01 18:10:33,193 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:10:33,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:10:33,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1803225825, now seen corresponding path program 31 times [2022-03-01 18:10:33,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:10:33,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924607530] [2022-03-01 18:10:33,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:10:33,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:10:33,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:10:33,404 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:33,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:10:33,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924607530] [2022-03-01 18:10:33,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924607530] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:10:33,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003223720] [2022-03-01 18:10:33,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:10:33,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:33,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:10:33,406 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:10:33,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-01 18:10:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:10:33,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:10:33,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:10:33,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:10:33,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:33,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2022-03-01 18:10:33,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:33,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-03-01 18:10:33,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-01 18:10:33,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-03-01 18:10:33,916 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:33,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:10:34,129 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:10:34,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 86 [2022-03-01 18:10:34,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:34,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:34,153 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:10:34,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 76 [2022-03-01 18:10:34,162 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:10:34,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 478 treesize of output 446 [2022-03-01 18:10:34,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:34,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:34,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:34,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-03-01 18:10:34,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:34,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:34,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:34,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-03-01 18:10:34,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:34,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:34,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:34,425 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:34,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003223720] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:10:34,425 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:10:34,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-01 18:10:34,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900636623] [2022-03-01 18:10:34,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:10:34,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 18:10:34,425 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:10:34,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 18:10:34,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:10:34,426 INFO L87 Difference]: Start difference. First operand 11276 states and 40456 transitions. Second operand has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:35,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:10:35,922 INFO L93 Difference]: Finished difference Result 17844 states and 63269 transitions. [2022-03-01 18:10:35,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 18:10:35,922 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 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 30 [2022-03-01 18:10:35,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:10:35,966 INFO L225 Difference]: With dead ends: 17844 [2022-03-01 18:10:35,966 INFO L226 Difference]: Without dead ends: 17793 [2022-03-01 18:10:35,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=318, Invalid=1662, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 18:10:35,967 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 266 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:10:35,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 221 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:10:35,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17793 states. [2022-03-01 18:10:36,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17793 to 11285. [2022-03-01 18:10:36,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11285 states, 11284 states have (on average 3.588709677419355) internal successors, (40495), 11284 states have internal predecessors, (40495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:36,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11285 states to 11285 states and 40495 transitions. [2022-03-01 18:10:36,286 INFO L78 Accepts]: Start accepts. Automaton has 11285 states and 40495 transitions. Word has length 30 [2022-03-01 18:10:36,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:10:36,286 INFO L470 AbstractCegarLoop]: Abstraction has 11285 states and 40495 transitions. [2022-03-01 18:10:36,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:36,286 INFO L276 IsEmpty]: Start isEmpty. Operand 11285 states and 40495 transitions. [2022-03-01 18:10:36,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:10:36,304 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:10:36,304 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:10:36,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-01 18:10:36,519 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,SelfDestructingSolverStorable38 [2022-03-01 18:10:36,520 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:10:36,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:10:36,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1471923427, now seen corresponding path program 32 times [2022-03-01 18:10:36,521 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:10:36,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263433879] [2022-03-01 18:10:36,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:10:36,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:10:36,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:10:36,757 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:36,757 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:10:36,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263433879] [2022-03-01 18:10:36,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263433879] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:10:36,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284759916] [2022-03-01 18:10:36,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:10:36,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:36,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:10:36,759 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:10:36,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-01 18:10:36,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:10:36,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:10:36,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:10:36,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:10:36,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:10:37,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:37,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2022-03-01 18:10:37,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:37,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 49 [2022-03-01 18:10:37,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:37,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-03-01 18:10:37,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:37,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 15 [2022-03-01 18:10:37,246 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:37,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:10:37,470 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:10:37,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 86 [2022-03-01 18:10:37,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:37,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:37,491 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:10:37,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 76 [2022-03-01 18:10:37,499 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:10:37,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 198 [2022-03-01 18:10:37,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:37,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:37,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:37,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 50 [2022-03-01 18:10:37,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:37,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:37,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:37,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2022-03-01 18:10:37,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:37,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:37,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:37,763 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:37,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284759916] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:10:37,763 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:10:37,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2022-03-01 18:10:37,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621672744] [2022-03-01 18:10:37,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:10:37,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 18:10:37,764 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:10:37,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 18:10:37,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:10:37,764 INFO L87 Difference]: Start difference. First operand 11285 states and 40495 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:39,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:10:39,239 INFO L93 Difference]: Finished difference Result 18171 states and 64224 transitions. [2022-03-01 18:10:39,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 18:10:39,240 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 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 30 [2022-03-01 18:10:39,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:10:39,285 INFO L225 Difference]: With dead ends: 18171 [2022-03-01 18:10:39,285 INFO L226 Difference]: Without dead ends: 18150 [2022-03-01 18:10:39,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=279, Invalid=1613, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 18:10:39,286 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 295 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:10:39,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 247 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:10:39,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18150 states. [2022-03-01 18:10:39,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18150 to 11289. [2022-03-01 18:10:39,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11289 states, 11288 states have (on average 3.5893869596031185) internal successors, (40517), 11288 states have internal predecessors, (40517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:39,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11289 states to 11289 states and 40517 transitions. [2022-03-01 18:10:39,513 INFO L78 Accepts]: Start accepts. Automaton has 11289 states and 40517 transitions. Word has length 30 [2022-03-01 18:10:39,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:10:39,513 INFO L470 AbstractCegarLoop]: Abstraction has 11289 states and 40517 transitions. [2022-03-01 18:10:39,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:39,514 INFO L276 IsEmpty]: Start isEmpty. Operand 11289 states and 40517 transitions. [2022-03-01 18:10:39,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:10:39,530 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:10:39,530 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:10:39,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-01 18:10:39,731 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,SelfDestructingSolverStorable39 [2022-03-01 18:10:39,731 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:10:39,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:10:39,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1713539717, now seen corresponding path program 33 times [2022-03-01 18:10:39,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:10:39,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28012172] [2022-03-01 18:10:39,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:10:39,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:10:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:10:39,950 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:39,951 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:10:39,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28012172] [2022-03-01 18:10:39,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28012172] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:10:39,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479511798] [2022-03-01 18:10:39,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:10:39,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:39,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:10:39,952 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:10:39,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-01 18:10:40,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:10:40,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:10:40,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:10:40,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:10:40,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:10:40,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:40,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2022-03-01 18:10:40,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:40,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2022-03-01 18:10:40,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:40,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2022-03-01 18:10:40,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-03-01 18:10:40,465 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:40,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:10:40,670 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:10:40,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 86 [2022-03-01 18:10:40,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:40,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:40,692 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:10:40,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 76 [2022-03-01 18:10:40,700 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:10:40,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 478 treesize of output 446 [2022-03-01 18:10:40,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:40,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:40,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:40,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-03-01 18:10:40,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:40,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:40,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:40,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-03-01 18:10:40,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:40,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:40,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:40,890 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:40,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479511798] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:10:40,890 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:10:40,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-01 18:10:40,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969189769] [2022-03-01 18:10:40,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:10:40,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 18:10:40,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:10:40,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 18:10:40,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:10:40,891 INFO L87 Difference]: Start difference. First operand 11289 states and 40517 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:42,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:10:42,320 INFO L93 Difference]: Finished difference Result 15127 states and 51549 transitions. [2022-03-01 18:10:42,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-01 18:10:42,320 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:10:42,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:10:42,351 INFO L225 Difference]: With dead ends: 15127 [2022-03-01 18:10:42,351 INFO L226 Difference]: Without dead ends: 15091 [2022-03-01 18:10:42,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=348, Invalid=2102, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 18:10:42,352 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 395 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:10:42,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 264 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1483 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:10:42,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15091 states. [2022-03-01 18:10:42,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15091 to 11206. [2022-03-01 18:10:42,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11206 states, 11205 states have (on average 3.5927710843373495) internal successors, (40257), 11205 states have internal predecessors, (40257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:42,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11206 states to 11206 states and 40257 transitions. [2022-03-01 18:10:42,546 INFO L78 Accepts]: Start accepts. Automaton has 11206 states and 40257 transitions. Word has length 30 [2022-03-01 18:10:42,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:10:42,547 INFO L470 AbstractCegarLoop]: Abstraction has 11206 states and 40257 transitions. [2022-03-01 18:10:42,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:42,547 INFO L276 IsEmpty]: Start isEmpty. Operand 11206 states and 40257 transitions. [2022-03-01 18:10:42,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:10:42,563 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:10:42,563 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:10:42,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-01 18:10:42,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:42,772 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:10:42,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:10:42,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1448303207, now seen corresponding path program 34 times [2022-03-01 18:10:42,774 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:10:42,774 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522424602] [2022-03-01 18:10:42,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:10:42,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:10:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:10:42,986 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:42,986 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:10:42,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522424602] [2022-03-01 18:10:42,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522424602] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:10:42,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467728947] [2022-03-01 18:10:42,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:10:42,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:42,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:10:42,987 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:10:42,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-01 18:10:43,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:10:43,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:10:43,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:10:43,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:10:43,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:10:43,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-03-01 18:10:43,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-03-01 18:10:43,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-01 18:10:43,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-03-01 18:10:43,350 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:43,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:10:43,497 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:10:43,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 86 [2022-03-01 18:10:43,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:43,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:43,515 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:10:43,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 76 [2022-03-01 18:10:43,521 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:10:43,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 478 treesize of output 446 [2022-03-01 18:10:43,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:43,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:43,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:43,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-03-01 18:10:43,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:43,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:43,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:43,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-03-01 18:10:43,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:43,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:43,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:43,767 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:43,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467728947] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:10:43,767 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:10:43,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-01 18:10:43,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201870506] [2022-03-01 18:10:43,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:10:43,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 18:10:43,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:10:43,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 18:10:43,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:10:43,768 INFO L87 Difference]: Start difference. First operand 11206 states and 40257 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:45,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:10:45,607 INFO L93 Difference]: Finished difference Result 15682 states and 53273 transitions. [2022-03-01 18:10:45,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 18:10:45,608 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:10:45,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:10:45,649 INFO L225 Difference]: With dead ends: 15682 [2022-03-01 18:10:45,649 INFO L226 Difference]: Without dead ends: 15646 [2022-03-01 18:10:45,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=489, Invalid=2703, Unknown=0, NotChecked=0, Total=3192 [2022-03-01 18:10:45,650 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 418 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 1538 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:10:45,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 289 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1538 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:10:45,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15646 states. [2022-03-01 18:10:45,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15646 to 11312. [2022-03-01 18:10:45,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11312 states, 11311 states have (on average 3.5949076120590577) internal successors, (40662), 11311 states have internal predecessors, (40662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:45,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11312 states to 11312 states and 40662 transitions. [2022-03-01 18:10:45,900 INFO L78 Accepts]: Start accepts. Automaton has 11312 states and 40662 transitions. Word has length 30 [2022-03-01 18:10:45,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:10:45,900 INFO L470 AbstractCegarLoop]: Abstraction has 11312 states and 40662 transitions. [2022-03-01 18:10:45,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:45,900 INFO L276 IsEmpty]: Start isEmpty. Operand 11312 states and 40662 transitions. [2022-03-01 18:10:45,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:10:45,919 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:10:45,919 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:10:45,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-01 18:10:46,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:46,137 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:10:46,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:10:46,137 INFO L85 PathProgramCache]: Analyzing trace with hash 701800485, now seen corresponding path program 35 times [2022-03-01 18:10:46,137 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:10:46,137 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050620854] [2022-03-01 18:10:46,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:10:46,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:10:46,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:10:46,423 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:46,423 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:10:46,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050620854] [2022-03-01 18:10:46,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050620854] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:10:46,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614758029] [2022-03-01 18:10:46,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:10:46,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:46,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:10:46,431 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:10:46,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-01 18:10:46,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 18:10:46,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:10:46,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-01 18:10:46,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:10:46,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:10:46,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:46,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2022-03-01 18:10:46,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:46,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-03-01 18:10:46,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-03-01 18:10:46,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-03-01 18:10:46,999 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:47,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:10:47,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:47,291 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:10:47,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 86 [2022-03-01 18:10:47,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:47,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:47,311 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:10:47,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 76 [2022-03-01 18:10:47,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:47,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:47,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:47,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:47,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:47,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:47,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-03-01 18:10:47,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:47,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:47,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:47,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-03-01 18:10:47,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:47,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:47,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:47,529 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:47,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614758029] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:10:47,529 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:10:47,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-03-01 18:10:47,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248695681] [2022-03-01 18:10:47,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:10:47,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:10:47,530 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:10:47,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:10:47,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:10:47,531 INFO L87 Difference]: Start difference. First operand 11312 states and 40662 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:53,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:10:53,812 INFO L93 Difference]: Finished difference Result 21377 states and 74506 transitions. [2022-03-01 18:10:53,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-01 18:10:53,813 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 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 30 [2022-03-01 18:10:53,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:10:53,871 INFO L225 Difference]: With dead ends: 21377 [2022-03-01 18:10:53,871 INFO L226 Difference]: Without dead ends: 21326 [2022-03-01 18:10:53,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3772 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1660, Invalid=8642, Unknown=0, NotChecked=0, Total=10302 [2022-03-01 18:10:53,873 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 534 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 2905 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 3025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:10:53,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 460 Invalid, 3025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2905 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-01 18:10:53,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21326 states. [2022-03-01 18:10:54,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21326 to 11846. [2022-03-01 18:10:54,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11846 states, 11845 states have (on average 3.599409033347404) internal successors, (42635), 11845 states have internal predecessors, (42635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:54,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11846 states to 11846 states and 42635 transitions. [2022-03-01 18:10:54,177 INFO L78 Accepts]: Start accepts. Automaton has 11846 states and 42635 transitions. Word has length 30 [2022-03-01 18:10:54,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:10:54,177 INFO L470 AbstractCegarLoop]: Abstraction has 11846 states and 42635 transitions. [2022-03-01 18:10:54,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:54,178 INFO L276 IsEmpty]: Start isEmpty. Operand 11846 states and 42635 transitions. [2022-03-01 18:10:54,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:10:54,202 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:10:54,202 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:10:54,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-01 18:10:54,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:54,418 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:10:54,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:10:54,419 INFO L85 PathProgramCache]: Analyzing trace with hash -416994807, now seen corresponding path program 36 times [2022-03-01 18:10:54,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:10:54,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170541040] [2022-03-01 18:10:54,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:10:54,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:10:54,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:10:54,739 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:54,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:10:54,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170541040] [2022-03-01 18:10:54,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170541040] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:10:54,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102046306] [2022-03-01 18:10:54,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:10:54,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:54,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:10:54,740 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:10:54,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-01 18:10:54,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 18:10:54,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:10:54,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:10:54,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:10:54,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:10:55,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:55,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:55,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2022-03-01 18:10:55,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:55,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 65 [2022-03-01 18:10:55,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:55,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 52 [2022-03-01 18:10:55,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-01 18:10:55,261 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:55,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:10:55,478 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:10:55,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 86 [2022-03-01 18:10:55,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:55,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:55,501 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:10:55,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 76 [2022-03-01 18:10:55,509 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:10:55,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 198 [2022-03-01 18:10:55,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:55,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:55,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:55,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 50 [2022-03-01 18:10:55,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:55,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:55,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:55,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2022-03-01 18:10:55,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:55,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:55,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:55,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102046306] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:10:55,782 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:10:55,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2022-03-01 18:10:55,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115366011] [2022-03-01 18:10:55,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:10:55,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 18:10:55,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:10:55,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 18:10:55,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:10:55,783 INFO L87 Difference]: Start difference. First operand 11846 states and 42635 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:57,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:10:57,865 INFO L93 Difference]: Finished difference Result 18406 states and 65255 transitions. [2022-03-01 18:10:57,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 18:10:57,866 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 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 30 [2022-03-01 18:10:57,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:10:57,920 INFO L225 Difference]: With dead ends: 18406 [2022-03-01 18:10:57,920 INFO L226 Difference]: Without dead ends: 18352 [2022-03-01 18:10:57,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=372, Invalid=1608, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 18:10:57,921 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 359 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 1536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:10:57,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 208 Invalid, 1536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-01 18:10:57,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18352 states. [2022-03-01 18:10:58,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18352 to 11938. [2022-03-01 18:10:58,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11938 states, 11937 states have (on average 3.600150791656195) internal successors, (42975), 11937 states have internal predecessors, (42975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:58,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11938 states to 11938 states and 42975 transitions. [2022-03-01 18:10:58,205 INFO L78 Accepts]: Start accepts. Automaton has 11938 states and 42975 transitions. Word has length 30 [2022-03-01 18:10:58,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:10:58,205 INFO L470 AbstractCegarLoop]: Abstraction has 11938 states and 42975 transitions. [2022-03-01 18:10:58,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:10:58,205 INFO L276 IsEmpty]: Start isEmpty. Operand 11938 states and 42975 transitions. [2022-03-01 18:10:58,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:10:58,226 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:10:58,226 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:10:58,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-01 18:10:58,443 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,SelfDestructingSolverStorable43 [2022-03-01 18:10:58,443 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:10:58,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:10:58,444 INFO L85 PathProgramCache]: Analyzing trace with hash -22684839, now seen corresponding path program 37 times [2022-03-01 18:10:58,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:10:58,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582679985] [2022-03-01 18:10:58,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:10:58,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:10:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:10:58,677 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:58,678 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:10:58,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582679985] [2022-03-01 18:10:58,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582679985] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:10:58,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913724830] [2022-03-01 18:10:58,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:10:58,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:58,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:10:58,680 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:10:58,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-01 18:10:58,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:10:58,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:10:58,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:10:58,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:10:59,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-03-01 18:10:59,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-03-01 18:10:59,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:59,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-03-01 18:10:59,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-03-01 18:10:59,220 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:59,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:10:59,414 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:10:59,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 86 [2022-03-01 18:10:59,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:59,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:59,447 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:10:59,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 76 [2022-03-01 18:10:59,457 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:10:59,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 478 treesize of output 446 [2022-03-01 18:10:59,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:59,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:59,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:59,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-03-01 18:10:59,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:59,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:59,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:59,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-03-01 18:10:59,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:59,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:59,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:59,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913724830] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:10:59,813 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:10:59,813 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-01 18:10:59,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763013083] [2022-03-01 18:10:59,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:10:59,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 18:10:59,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:10:59,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 18:10:59,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:10:59,814 INFO L87 Difference]: Start difference. First operand 11938 states and 42975 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:03,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:11:03,770 INFO L93 Difference]: Finished difference Result 22417 states and 74446 transitions. [2022-03-01 18:11:03,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-01 18:11:03,771 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:11:03,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:11:03,832 INFO L225 Difference]: With dead ends: 22417 [2022-03-01 18:11:03,832 INFO L226 Difference]: Without dead ends: 22288 [2022-03-01 18:11:03,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1590 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=747, Invalid=4509, Unknown=0, NotChecked=0, Total=5256 [2022-03-01 18:11:03,833 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 515 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 3065 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 3133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 3065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:11:03,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 682 Invalid, 3133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 3065 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-01 18:11:03,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22288 states. [2022-03-01 18:11:04,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22288 to 12527. [2022-03-01 18:11:04,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12527 states, 12526 states have (on average 3.6147213795305766) internal successors, (45278), 12526 states have internal predecessors, (45278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:04,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12527 states to 12527 states and 45278 transitions. [2022-03-01 18:11:04,198 INFO L78 Accepts]: Start accepts. Automaton has 12527 states and 45278 transitions. Word has length 30 [2022-03-01 18:11:04,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:11:04,198 INFO L470 AbstractCegarLoop]: Abstraction has 12527 states and 45278 transitions. [2022-03-01 18:11:04,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:04,198 INFO L276 IsEmpty]: Start isEmpty. Operand 12527 states and 45278 transitions. [2022-03-01 18:11:04,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:11:04,219 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:11:04,219 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:11:04,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-01 18:11:04,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-01 18:11:04,436 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:11:04,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:11:04,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1697328153, now seen corresponding path program 38 times [2022-03-01 18:11:04,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:11:04,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991415494] [2022-03-01 18:11:04,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:11:04,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:11:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:11:04,687 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:04,687 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:11:04,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991415494] [2022-03-01 18:11:04,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991415494] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:11:04,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380871612] [2022-03-01 18:11:04,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:11:04,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:11:04,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:11:04,689 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:11:04,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-01 18:11:04,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:11:04,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:11:04,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-01 18:11:04,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:11:04,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:11:05,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:05,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-03-01 18:11:05,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:05,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 28 [2022-03-01 18:11:05,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:05,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2022-03-01 18:11:05,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-03-01 18:11:05,245 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:05,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:11:05,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:05,546 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:11:05,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 79 treesize of output 98 [2022-03-01 18:11:05,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:05,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:05,567 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:11:05,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 84 [2022-03-01 18:11:05,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:05,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1014 treesize of output 966 [2022-03-01 18:11:05,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:05,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:05,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:05,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 60 [2022-03-01 18:11:05,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:05,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:05,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:05,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-03-01 18:11:05,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:05,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:05,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:05,822 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:05,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380871612] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:11:05,823 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:11:05,823 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2022-03-01 18:11:05,823 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868658986] [2022-03-01 18:11:05,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:11:05,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:11:05,823 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:11:05,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:11:05,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:11:05,824 INFO L87 Difference]: Start difference. First operand 12527 states and 45278 transitions. Second operand has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:13,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:11:13,515 INFO L93 Difference]: Finished difference Result 23372 states and 81645 transitions. [2022-03-01 18:11:13,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-01 18:11:13,515 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:11:13,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:11:13,591 INFO L225 Difference]: With dead ends: 23372 [2022-03-01 18:11:13,591 INFO L226 Difference]: Without dead ends: 23302 [2022-03-01 18:11:13,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3353 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1788, Invalid=8718, Unknown=0, NotChecked=0, Total=10506 [2022-03-01 18:11:13,593 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 670 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 3720 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 3856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 3720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:11:13,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [670 Valid, 468 Invalid, 3856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 3720 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-01 18:11:13,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23302 states. [2022-03-01 18:11:13,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23302 to 13527. [2022-03-01 18:11:13,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13527 states, 13526 states have (on average 3.618142836019518) internal successors, (48939), 13526 states have internal predecessors, (48939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:13,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13527 states to 13527 states and 48939 transitions. [2022-03-01 18:11:13,945 INFO L78 Accepts]: Start accepts. Automaton has 13527 states and 48939 transitions. Word has length 30 [2022-03-01 18:11:13,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:11:13,945 INFO L470 AbstractCegarLoop]: Abstraction has 13527 states and 48939 transitions. [2022-03-01 18:11:13,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:13,946 INFO L276 IsEmpty]: Start isEmpty. Operand 13527 states and 48939 transitions. [2022-03-01 18:11:13,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:11:13,973 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:11:13,973 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:11:13,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-01 18:11:14,186 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,SelfDestructingSolverStorable45 [2022-03-01 18:11:14,186 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:11:14,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:11:14,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1027608453, now seen corresponding path program 39 times [2022-03-01 18:11:14,186 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:11:14,186 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966913877] [2022-03-01 18:11:14,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:11:14,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:11:14,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:11:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:14,373 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:11:14,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966913877] [2022-03-01 18:11:14,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966913877] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:11:14,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950946351] [2022-03-01 18:11:14,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:11:14,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:11:14,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:11:14,375 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:11:14,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-01 18:11:14,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 18:11:14,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:11:14,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-01 18:11:14,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:11:14,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:11:14,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:14,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-01 18:11:14,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:14,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:14,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-03-01 18:11:14,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-03-01 18:11:14,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-03-01 18:11:14,998 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:14,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:11:15,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:15,372 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:11:15,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 153 treesize of output 154 [2022-03-01 18:11:15,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:15,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:15,396 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:11:15,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 117 treesize of output 122 [2022-03-01 18:11:15,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:15,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:15,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 413 treesize of output 389 [2022-03-01 18:11:15,920 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:15,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950946351] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:11:15,921 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:11:15,921 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-03-01 18:11:15,921 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994840528] [2022-03-01 18:11:15,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:11:15,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 18:11:15,921 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:11:15,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 18:11:15,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:11:15,922 INFO L87 Difference]: Start difference. First operand 13527 states and 48939 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:16,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:11:16,854 INFO L93 Difference]: Finished difference Result 15110 states and 53669 transitions. [2022-03-01 18:11:16,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 18:11:16,854 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 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 30 [2022-03-01 18:11:16,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:11:16,921 INFO L225 Difference]: With dead ends: 15110 [2022-03-01 18:11:16,921 INFO L226 Difference]: Without dead ends: 15052 [2022-03-01 18:11:16,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:11:16,922 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 157 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 503 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:11:16,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 283 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1027 Invalid, 0 Unknown, 503 Unchecked, 0.6s Time] [2022-03-01 18:11:16,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15052 states. [2022-03-01 18:11:17,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15052 to 13566. [2022-03-01 18:11:17,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13566 states, 13565 states have (on average 3.6155547364541096) internal successors, (49045), 13565 states have internal predecessors, (49045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:17,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13566 states to 13566 states and 49045 transitions. [2022-03-01 18:11:17,282 INFO L78 Accepts]: Start accepts. Automaton has 13566 states and 49045 transitions. Word has length 30 [2022-03-01 18:11:17,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:11:17,282 INFO L470 AbstractCegarLoop]: Abstraction has 13566 states and 49045 transitions. [2022-03-01 18:11:17,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:17,283 INFO L276 IsEmpty]: Start isEmpty. Operand 13566 states and 49045 transitions. [2022-03-01 18:11:17,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:11:17,310 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:11:17,310 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:11:17,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-01 18:11:17,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-01 18:11:17,528 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:11:17,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:11:17,528 INFO L85 PathProgramCache]: Analyzing trace with hash -2146403745, now seen corresponding path program 40 times [2022-03-01 18:11:17,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:11:17,529 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627074882] [2022-03-01 18:11:17,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:11:17,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:11:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:11:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:17,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:11:17,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627074882] [2022-03-01 18:11:17,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627074882] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:11:17,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055676110] [2022-03-01 18:11:17,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:11:17,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:11:17,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:11:17,733 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:11:17,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-01 18:11:17,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:11:17,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:11:17,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:11:17,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:11:17,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:11:18,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:18,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-01 18:11:18,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:18,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2022-03-01 18:11:18,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:18,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2022-03-01 18:11:18,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-01 18:11:18,286 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:18,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:11:18,492 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:11:18,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 97 [2022-03-01 18:11:18,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:18,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:18,519 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:11:18,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 83 [2022-03-01 18:11:18,532 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:11:18,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1962 treesize of output 1866 [2022-03-01 18:11:19,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:19,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:19,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:19,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 60 [2022-03-01 18:11:19,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:19,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:19,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:19,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-03-01 18:11:19,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:19,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:19,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:19,322 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:19,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055676110] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:11:19,322 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:11:19,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 18:11:19,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910006507] [2022-03-01 18:11:19,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:11:19,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:11:19,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:11:19,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:11:19,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:11:19,323 INFO L87 Difference]: Start difference. First operand 13566 states and 49045 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:19,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:11:19,924 INFO L93 Difference]: Finished difference Result 14686 states and 52491 transitions. [2022-03-01 18:11:19,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 18:11:19,925 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:11:19,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:11:20,076 INFO L225 Difference]: With dead ends: 14686 [2022-03-01 18:11:20,076 INFO L226 Difference]: Without dead ends: 14661 [2022-03-01 18:11:20,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:11:20,091 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 164 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:11:20,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 192 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:11:20,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14661 states. [2022-03-01 18:11:20,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14661 to 13684. [2022-03-01 18:11:20,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13684 states, 13683 states have (on average 3.6158737119052837) internal successors, (49476), 13683 states have internal predecessors, (49476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:20,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13684 states to 13684 states and 49476 transitions. [2022-03-01 18:11:20,412 INFO L78 Accepts]: Start accepts. Automaton has 13684 states and 49476 transitions. Word has length 30 [2022-03-01 18:11:20,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:11:20,413 INFO L470 AbstractCegarLoop]: Abstraction has 13684 states and 49476 transitions. [2022-03-01 18:11:20,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:20,413 INFO L276 IsEmpty]: Start isEmpty. Operand 13684 states and 49476 transitions. [2022-03-01 18:11:20,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:11:20,439 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:11:20,439 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:11:20,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-01 18:11:20,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:11:20,658 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:11:20,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:11:20,660 INFO L85 PathProgramCache]: Analyzing trace with hash 198851673, now seen corresponding path program 41 times [2022-03-01 18:11:20,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:11:20,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612910650] [2022-03-01 18:11:20,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:11:20,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:11:20,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:11:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:20,900 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:11:20,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612910650] [2022-03-01 18:11:20,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612910650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:11:20,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841352845] [2022-03-01 18:11:20,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:11:20,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:11:20,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:11:20,916 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:11:20,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-01 18:11:20,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 18:11:20,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:11:20,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-01 18:11:20,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:11:21,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:11:21,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:21,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-01 18:11:21,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:21,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2022-03-01 18:11:21,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:21,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2022-03-01 18:11:21,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-03-01 18:11:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:21,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:11:21,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:21,856 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:11:21,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 79 treesize of output 98 [2022-03-01 18:11:21,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:21,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:21,878 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:11:21,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 84 [2022-03-01 18:11:21,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:21,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:21,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:22,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:22,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:22,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:22,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 60 [2022-03-01 18:11:22,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:22,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:22,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:22,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-03-01 18:11:22,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:22,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:22,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:22,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841352845] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:11:22,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:11:22,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 27 [2022-03-01 18:11:22,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310948561] [2022-03-01 18:11:22,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:11:22,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:11:22,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:11:22,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:11:22,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:11:22,138 INFO L87 Difference]: Start difference. First operand 13684 states and 49476 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:27,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:11:27,204 INFO L93 Difference]: Finished difference Result 24766 states and 86992 transitions. [2022-03-01 18:11:27,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-01 18:11:27,205 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:11:27,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:11:27,270 INFO L225 Difference]: With dead ends: 24766 [2022-03-01 18:11:27,270 INFO L226 Difference]: Without dead ends: 24705 [2022-03-01 18:11:27,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3121 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1200, Invalid=8306, Unknown=0, NotChecked=0, Total=9506 [2022-03-01 18:11:27,273 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 474 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 2899 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 3345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:11:27,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 411 Invalid, 3345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2899 Invalid, 0 Unknown, 377 Unchecked, 1.9s Time] [2022-03-01 18:11:27,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24705 states. [2022-03-01 18:11:27,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24705 to 13889. [2022-03-01 18:11:27,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13889 states, 13888 states have (on average 3.6162154377880182) internal successors, (50222), 13888 states have internal predecessors, (50222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:27,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13889 states to 13889 states and 50222 transitions. [2022-03-01 18:11:27,638 INFO L78 Accepts]: Start accepts. Automaton has 13889 states and 50222 transitions. Word has length 30 [2022-03-01 18:11:27,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:11:27,639 INFO L470 AbstractCegarLoop]: Abstraction has 13889 states and 50222 transitions. [2022-03-01 18:11:27,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:27,639 INFO L276 IsEmpty]: Start isEmpty. Operand 13889 states and 50222 transitions. [2022-03-01 18:11:27,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:11:27,663 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:11:27,663 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:11:27,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-01 18:11:27,867 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,SelfDestructingSolverStorable48 [2022-03-01 18:11:27,868 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:11:27,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:11:27,869 INFO L85 PathProgramCache]: Analyzing trace with hash 2114563583, now seen corresponding path program 42 times [2022-03-01 18:11:27,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:11:27,869 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258316608] [2022-03-01 18:11:27,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:11:27,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:11:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:11:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:28,098 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:11:28,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258316608] [2022-03-01 18:11:28,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258316608] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:11:28,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947062960] [2022-03-01 18:11:28,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:11:28,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:11:28,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:11:28,099 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:11:28,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-01 18:11:28,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 18:11:28,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:11:28,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:11:28,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:11:28,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:11:28,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:28,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-03-01 18:11:28,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-03-01 18:11:28,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-03-01 18:11:28,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-03-01 18:11:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:28,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:11:28,784 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:11:28,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 86 [2022-03-01 18:11:28,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:28,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:28,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:11:28,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 76 [2022-03-01 18:11:28,813 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:11:28,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 234 treesize of output 218 [2022-03-01 18:11:29,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:29,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:29,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:29,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-03-01 18:11:29,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:29,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:29,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:29,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-03-01 18:11:29,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:29,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:29,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:29,116 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:29,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947062960] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:11:29,116 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:11:29,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-01 18:11:29,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668119052] [2022-03-01 18:11:29,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:11:29,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 18:11:29,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:11:29,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 18:11:29,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-03-01 18:11:29,117 INFO L87 Difference]: Start difference. First operand 13889 states and 50222 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:29,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:11:29,657 INFO L93 Difference]: Finished difference Result 15095 states and 53867 transitions. [2022-03-01 18:11:29,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 18:11:29,657 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:11:29,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:11:29,691 INFO L225 Difference]: With dead ends: 15095 [2022-03-01 18:11:29,692 INFO L226 Difference]: Without dead ends: 15056 [2022-03-01 18:11:29,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:11:29,692 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 143 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:11:29,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 186 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:11:29,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15056 states. [2022-03-01 18:11:29,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15056 to 13856. [2022-03-01 18:11:29,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13856 states, 13855 states have (on average 3.6176109707686757) internal successors, (50122), 13855 states have internal predecessors, (50122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:29,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13856 states to 13856 states and 50122 transitions. [2022-03-01 18:11:29,936 INFO L78 Accepts]: Start accepts. Automaton has 13856 states and 50122 transitions. Word has length 30 [2022-03-01 18:11:29,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:11:29,936 INFO L470 AbstractCegarLoop]: Abstraction has 13856 states and 50122 transitions. [2022-03-01 18:11:29,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:29,936 INFO L276 IsEmpty]: Start isEmpty. Operand 13856 states and 50122 transitions. [2022-03-01 18:11:29,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:11:29,958 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:11:29,959 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:11:29,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-01 18:11:30,163 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,SelfDestructingSolverStorable49 [2022-03-01 18:11:30,164 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:11:30,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:11:30,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1529864005, now seen corresponding path program 43 times [2022-03-01 18:11:30,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:11:30,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628410221] [2022-03-01 18:11:30,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:11:30,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:11:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:11:30,393 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:30,393 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:11:30,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628410221] [2022-03-01 18:11:30,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628410221] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:11:30,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030981926] [2022-03-01 18:11:30,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:11:30,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:11:30,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:11:30,394 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:11:30,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-01 18:11:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:11:30,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:11:30,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:11:30,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:11:30,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:30,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-01 18:11:30,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:30,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2022-03-01 18:11:30,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-03-01 18:11:30,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-03-01 18:11:30,952 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:30,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:11:31,197 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:11:31,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 97 [2022-03-01 18:11:31,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:31,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:31,223 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:11:31,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 83 [2022-03-01 18:11:31,234 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:11:31,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 982 treesize of output 934 [2022-03-01 18:11:31,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:31,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:31,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:31,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 60 [2022-03-01 18:11:31,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:31,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:31,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:31,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-03-01 18:11:31,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:31,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:31,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:31,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030981926] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:11:31,830 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:11:31,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-03-01 18:11:31,831 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079802621] [2022-03-01 18:11:31,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:11:31,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:11:31,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:11:31,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:11:31,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:11:31,831 INFO L87 Difference]: Start difference. First operand 13856 states and 50122 transitions. Second operand has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:32,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:11:32,451 INFO L93 Difference]: Finished difference Result 15000 states and 53772 transitions. [2022-03-01 18:11:32,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 18:11:32,452 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:11:32,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:11:32,508 INFO L225 Difference]: With dead ends: 15000 [2022-03-01 18:11:32,509 INFO L226 Difference]: Without dead ends: 14967 [2022-03-01 18:11:32,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:11:32,509 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 100 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:11:32,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 302 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:11:32,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14967 states. [2022-03-01 18:11:32,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14967 to 13886. [2022-03-01 18:11:32,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13886 states, 13885 states have (on average 3.616996759092546) internal successors, (50222), 13885 states have internal predecessors, (50222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:32,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13886 states to 13886 states and 50222 transitions. [2022-03-01 18:11:32,882 INFO L78 Accepts]: Start accepts. Automaton has 13886 states and 50222 transitions. Word has length 30 [2022-03-01 18:11:32,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:11:32,882 INFO L470 AbstractCegarLoop]: Abstraction has 13886 states and 50222 transitions. [2022-03-01 18:11:32,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:32,882 INFO L276 IsEmpty]: Start isEmpty. Operand 13886 states and 50222 transitions. [2022-03-01 18:11:32,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:11:32,920 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:11:32,920 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:11:32,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-01 18:11:33,145 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,SelfDestructingSolverStorable50 [2022-03-01 18:11:33,145 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:11:33,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:11:33,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1344651679, now seen corresponding path program 44 times [2022-03-01 18:11:33,145 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:11:33,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332087097] [2022-03-01 18:11:33,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:11:33,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:11:33,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:11:33,328 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:33,329 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:11:33,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332087097] [2022-03-01 18:11:33,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332087097] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:11:33,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865031800] [2022-03-01 18:11:33,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:11:33,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:11:33,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:11:33,330 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:11:33,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-01 18:11:33,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:11:33,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:11:33,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:11:33,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:11:33,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:11:33,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:33,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-01 18:11:33,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-03-01 18:11:33,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-03-01 18:11:33,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-03-01 18:11:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:33,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:11:34,074 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:11:34,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 97 [2022-03-01 18:11:34,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:34,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:34,098 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:11:34,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 83 [2022-03-01 18:11:34,108 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:11:34,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 452 treesize of output 428 [2022-03-01 18:11:34,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:34,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:34,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:34,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 60 [2022-03-01 18:11:34,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:34,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:34,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:34,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-03-01 18:11:34,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:34,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:34,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:34,507 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:34,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865031800] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:11:34,507 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:11:34,507 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 18:11:34,507 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671547657] [2022-03-01 18:11:34,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:11:34,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:11:34,508 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:11:34,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:11:34,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:11:34,508 INFO L87 Difference]: Start difference. First operand 13886 states and 50222 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:34,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:11:34,997 INFO L93 Difference]: Finished difference Result 14845 states and 53246 transitions. [2022-03-01 18:11:34,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 18:11:34,998 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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 30 [2022-03-01 18:11:34,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:11:35,047 INFO L225 Difference]: With dead ends: 14845 [2022-03-01 18:11:35,047 INFO L226 Difference]: Without dead ends: 14782 [2022-03-01 18:11:35,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:11:35,048 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 104 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:11:35,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 225 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:11:35,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14782 states. [2022-03-01 18:11:35,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14782 to 13895. [2022-03-01 18:11:35,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13895 states, 13894 states have (on average 3.617244853893767) internal successors, (50258), 13894 states have internal predecessors, (50258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:35,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13895 states to 13895 states and 50258 transitions. [2022-03-01 18:11:35,356 INFO L78 Accepts]: Start accepts. Automaton has 13895 states and 50258 transitions. Word has length 30 [2022-03-01 18:11:35,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:11:35,356 INFO L470 AbstractCegarLoop]: Abstraction has 13895 states and 50258 transitions. [2022-03-01 18:11:35,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:35,356 INFO L276 IsEmpty]: Start isEmpty. Operand 13895 states and 50258 transitions. [2022-03-01 18:11:35,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:11:35,386 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:11:35,386 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:11:35,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-01 18:11:35,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:11:35,607 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:11:35,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:11:35,608 INFO L85 PathProgramCache]: Analyzing trace with hash 324833635, now seen corresponding path program 45 times [2022-03-01 18:11:35,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:11:35,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472937237] [2022-03-01 18:11:35,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:11:35,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:11:35,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:11:35,799 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:35,799 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:11:35,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472937237] [2022-03-01 18:11:35,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472937237] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:11:35,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245664682] [2022-03-01 18:11:35,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:11:35,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:11:35,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:11:35,801 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:11:35,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-01 18:11:35,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 18:11:35,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:11:35,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-01 18:11:35,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:11:35,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:11:36,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:36,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-01 18:11:36,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-03-01 18:11:36,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-01 18:11:36,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:36,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:36,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-03-01 18:11:36,449 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:36,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:11:36,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:36,946 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:11:36,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 153 treesize of output 154 [2022-03-01 18:11:36,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:36,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:36,973 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:11:36,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 117 treesize of output 122 [2022-03-01 18:11:36,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:36,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:36,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 805 treesize of output 757 [2022-03-01 18:11:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:37,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245664682] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:11:37,874 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:11:37,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-03-01 18:11:37,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837342167] [2022-03-01 18:11:37,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:11:37,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 18:11:37,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:11:37,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 18:11:37,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:11:37,875 INFO L87 Difference]: Start difference. First operand 13895 states and 50258 transitions. Second operand has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:38,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:11:38,885 INFO L93 Difference]: Finished difference Result 16534 states and 58806 transitions. [2022-03-01 18:11:38,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 18:11:38,886 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 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 30 [2022-03-01 18:11:38,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:11:38,942 INFO L225 Difference]: With dead ends: 16534 [2022-03-01 18:11:38,942 INFO L226 Difference]: Without dead ends: 16501 [2022-03-01 18:11:38,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:11:38,943 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 154 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:11:38,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 327 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 874 Invalid, 0 Unknown, 264 Unchecked, 0.5s Time] [2022-03-01 18:11:38,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16501 states. [2022-03-01 18:11:39,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16501 to 14057. [2022-03-01 18:11:39,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14057 states, 14056 states have (on average 3.6129055207740466) internal successors, (50783), 14056 states have internal predecessors, (50783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:39,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14057 states to 14057 states and 50783 transitions. [2022-03-01 18:11:39,283 INFO L78 Accepts]: Start accepts. Automaton has 14057 states and 50783 transitions. Word has length 30 [2022-03-01 18:11:39,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:11:39,283 INFO L470 AbstractCegarLoop]: Abstraction has 14057 states and 50783 transitions. [2022-03-01 18:11:39,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:39,283 INFO L276 IsEmpty]: Start isEmpty. Operand 14057 states and 50783 transitions. [2022-03-01 18:11:39,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:11:39,311 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:11:39,311 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:11:39,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-01 18:11:39,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:11:39,527 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:11:39,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:11:39,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1748496823, now seen corresponding path program 46 times [2022-03-01 18:11:39,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:11:39,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670544277] [2022-03-01 18:11:39,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:11:39,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:11:39,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:11:39,708 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:39,708 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:11:39,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670544277] [2022-03-01 18:11:39,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670544277] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:11:39,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279524333] [2022-03-01 18:11:39,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:11:39,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:11:39,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:11:39,710 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:11:39,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-01 18:11:39,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:11:39,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:11:39,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:11:39,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:11:39,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:11:39,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:39,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-01 18:11:40,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-03-01 18:11:40,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-03-01 18:11:40,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-03-01 18:11:40,263 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:40,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:11:40,471 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:11:40,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 97 [2022-03-01 18:11:40,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:40,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:40,495 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:11:40,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 83 [2022-03-01 18:11:40,506 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:11:40,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 978 treesize of output 930 [2022-03-01 18:11:40,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:40,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:40,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:40,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 60 [2022-03-01 18:11:40,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:40,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:40,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:40,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-03-01 18:11:40,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:40,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:40,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:40,929 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:40,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279524333] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:11:40,930 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:11:40,930 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 18:11:40,930 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755545230] [2022-03-01 18:11:40,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:11:40,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:11:40,930 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:11:40,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:11:40,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:11:40,931 INFO L87 Difference]: Start difference. First operand 14057 states and 50783 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:41,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:11:41,522 INFO L93 Difference]: Finished difference Result 14932 states and 53497 transitions. [2022-03-01 18:11:41,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 18:11:41,523 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 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 30 [2022-03-01 18:11:41,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:11:41,569 INFO L225 Difference]: With dead ends: 14932 [2022-03-01 18:11:41,570 INFO L226 Difference]: Without dead ends: 14907 [2022-03-01 18:11:41,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:11:41,570 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 71 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:11:41,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 284 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:11:41,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14907 states. [2022-03-01 18:11:41,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14907 to 13958. [2022-03-01 18:11:41,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13958 states, 13957 states have (on average 3.6155334240882713) internal successors, (50462), 13957 states have internal predecessors, (50462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:41,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13958 states to 13958 states and 50462 transitions. [2022-03-01 18:11:41,931 INFO L78 Accepts]: Start accepts. Automaton has 13958 states and 50462 transitions. Word has length 30 [2022-03-01 18:11:41,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:11:41,932 INFO L470 AbstractCegarLoop]: Abstraction has 13958 states and 50462 transitions. [2022-03-01 18:11:41,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:41,932 INFO L276 IsEmpty]: Start isEmpty. Operand 13958 states and 50462 transitions. [2022-03-01 18:11:41,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:11:41,962 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:11:41,963 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:11:41,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-01 18:11:42,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:11:42,179 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:11:42,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:11:42,181 INFO L85 PathProgramCache]: Analyzing trace with hash 277277977, now seen corresponding path program 47 times [2022-03-01 18:11:42,181 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:11:42,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341213191] [2022-03-01 18:11:42,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:11:42,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:11:42,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:11:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:42,349 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:11:42,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341213191] [2022-03-01 18:11:42,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341213191] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:11:42,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881368343] [2022-03-01 18:11:42,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:11:42,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:11:42,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:11:42,351 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:11:42,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-01 18:11:42,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 18:11:42,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:11:42,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:11:42,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:11:42,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:11:42,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:42,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-01 18:11:43,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:43,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:43,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:11:43,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 69 [2022-03-01 18:11:43,436 INFO L353 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-03-01 18:11:43,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 249 treesize of output 203 [2022-03-01 18:11:43,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:43,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:43,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:43,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:43,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-03-01 18:11:43,481 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:43,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:11:46,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:46,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:46,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:46,868 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:11:46,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 153 treesize of output 148 [2022-03-01 18:11:46,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:46,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:46,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:46,903 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:11:46,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 112 [2022-03-01 18:11:46,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:46,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:46,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:46,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:47,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881368343] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:11:47,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:11:47,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 30 [2022-03-01 18:11:47,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904266707] [2022-03-01 18:11:47,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:11:47,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:11:47,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:11:47,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:11:47,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=770, Unknown=1, NotChecked=0, Total=930 [2022-03-01 18:11:47,163 INFO L87 Difference]: Start difference. First operand 13958 states and 50462 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:50,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:11:50,707 INFO L93 Difference]: Finished difference Result 17619 states and 62768 transitions. [2022-03-01 18:11:50,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-01 18:11:50,707 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:11:50,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:11:50,763 INFO L225 Difference]: With dead ends: 17619 [2022-03-01 18:11:50,763 INFO L226 Difference]: Without dead ends: 17590 [2022-03-01 18:11:50,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 53 SyntacticMatches, 10 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1079, Invalid=5396, Unknown=5, NotChecked=0, Total=6480 [2022-03-01 18:11:50,765 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 257 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 1543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1052 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:11:50,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 467 Invalid, 1543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 474 Invalid, 0 Unknown, 1052 Unchecked, 0.3s Time] [2022-03-01 18:11:50,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17590 states. [2022-03-01 18:11:51,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17590 to 14619. [2022-03-01 18:11:51,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14619 states, 14618 states have (on average 3.619715419346012) internal successors, (52913), 14618 states have internal predecessors, (52913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:51,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14619 states to 14619 states and 52913 transitions. [2022-03-01 18:11:51,198 INFO L78 Accepts]: Start accepts. Automaton has 14619 states and 52913 transitions. Word has length 30 [2022-03-01 18:11:51,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:11:51,198 INFO L470 AbstractCegarLoop]: Abstraction has 14619 states and 52913 transitions. [2022-03-01 18:11:51,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:51,198 INFO L276 IsEmpty]: Start isEmpty. Operand 14619 states and 52913 transitions. [2022-03-01 18:11:51,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:11:51,228 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:11:51,228 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:11:51,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-01 18:11:51,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-01 18:11:51,449 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:11:51,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:11:51,450 INFO L85 PathProgramCache]: Analyzing trace with hash -742540067, now seen corresponding path program 48 times [2022-03-01 18:11:51,450 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:11:51,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087598813] [2022-03-01 18:11:51,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:11:51,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:11:51,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:11:51,616 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:51,616 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:11:51,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087598813] [2022-03-01 18:11:51,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087598813] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:11:51,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113250838] [2022-03-01 18:11:51,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:11:51,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:11:51,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:11:51,618 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:11:51,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-01 18:11:51,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 18:11:51,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:11:51,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:11:51,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:11:51,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:11:51,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:51,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-01 18:11:52,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-03-01 18:11:52,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-03-01 18:11:52,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-03-01 18:11:52,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:52,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:11:52,302 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:11:52,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 97 [2022-03-01 18:11:52,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:52,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:52,326 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:11:52,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 83 [2022-03-01 18:11:52,335 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:11:52,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 978 treesize of output 930 [2022-03-01 18:11:52,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:52,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:52,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:52,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 60 [2022-03-01 18:11:52,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:52,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:52,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:52,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-03-01 18:11:52,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:52,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:52,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:52,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113250838] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:11:52,718 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:11:52,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 18:11:52,718 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032693798] [2022-03-01 18:11:52,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:11:52,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:11:52,718 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:11:52,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:11:52,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:11:52,719 INFO L87 Difference]: Start difference. First operand 14619 states and 52913 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:53,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:11:53,129 INFO L93 Difference]: Finished difference Result 15793 states and 56665 transitions. [2022-03-01 18:11:53,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 18:11:53,130 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 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 30 [2022-03-01 18:11:53,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:11:53,177 INFO L225 Difference]: With dead ends: 15793 [2022-03-01 18:11:53,178 INFO L226 Difference]: Without dead ends: 15760 [2022-03-01 18:11:53,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:11:53,178 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 133 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:11:53,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 189 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 492 Invalid, 0 Unknown, 121 Unchecked, 0.3s Time] [2022-03-01 18:11:53,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15760 states. [2022-03-01 18:11:53,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15760 to 14779. [2022-03-01 18:11:53,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14779 states, 14778 states have (on average 3.6170659087833266) internal successors, (53453), 14778 states have internal predecessors, (53453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:53,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14779 states to 14779 states and 53453 transitions. [2022-03-01 18:11:53,500 INFO L78 Accepts]: Start accepts. Automaton has 14779 states and 53453 transitions. Word has length 30 [2022-03-01 18:11:53,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:11:53,501 INFO L470 AbstractCegarLoop]: Abstraction has 14779 states and 53453 transitions. [2022-03-01 18:11:53,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:53,501 INFO L276 IsEmpty]: Start isEmpty. Operand 14779 states and 53453 transitions. [2022-03-01 18:11:53,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:11:53,531 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:11:53,531 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:11:53,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-01 18:11:53,751 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,SelfDestructingSolverStorable55 [2022-03-01 18:11:53,751 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:11:53,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:11:53,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1479096771, now seen corresponding path program 49 times [2022-03-01 18:11:53,751 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:11:53,751 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431012619] [2022-03-01 18:11:53,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:11:53,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:11:53,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:11:53,950 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:53,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:11:53,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431012619] [2022-03-01 18:11:53,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431012619] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:11:53,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165553565] [2022-03-01 18:11:53,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:11:53,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:11:53,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:11:53,951 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:11:53,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-01 18:11:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:11:53,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:11:53,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:11:54,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:11:54,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:54,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-01 18:11:54,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:54,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 66 [2022-03-01 18:11:54,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:54,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 52 [2022-03-01 18:11:54,552 INFO L353 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-03-01 18:11:54,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 67 [2022-03-01 18:11:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:54,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:11:54,830 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:11:54,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 97 [2022-03-01 18:11:54,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:54,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:54,853 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:11:54,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 83 [2022-03-01 18:11:54,864 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:11:54,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1766 treesize of output 1670 [2022-03-01 18:11:55,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:55,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:55,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:55,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 60 [2022-03-01 18:11:55,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:55,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:55,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:55,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-03-01 18:11:55,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:55,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:55,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:55,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:56,037 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:56,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165553565] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:11:56,038 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:11:56,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 18:11:56,038 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466127658] [2022-03-01 18:11:56,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:11:56,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:11:56,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:11:56,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:11:56,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:11:56,039 INFO L87 Difference]: Start difference. First operand 14779 states and 53453 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:56,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:11:56,568 INFO L93 Difference]: Finished difference Result 15575 states and 55865 transitions. [2022-03-01 18:11:56,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 18:11:56,568 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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 30 [2022-03-01 18:11:56,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:11:56,619 INFO L225 Difference]: With dead ends: 15575 [2022-03-01 18:11:56,620 INFO L226 Difference]: Without dead ends: 15542 [2022-03-01 18:11:56,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:11:56,620 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 104 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:11:56,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 195 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:11:56,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15542 states. [2022-03-01 18:11:56,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15542 to 14580. [2022-03-01 18:11:56,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14580 states, 14579 states have (on average 3.619795596405789) internal successors, (52773), 14579 states have internal predecessors, (52773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:56,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14580 states to 14580 states and 52773 transitions. [2022-03-01 18:11:56,942 INFO L78 Accepts]: Start accepts. Automaton has 14580 states and 52773 transitions. Word has length 30 [2022-03-01 18:11:56,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:11:56,942 INFO L470 AbstractCegarLoop]: Abstraction has 14580 states and 52773 transitions. [2022-03-01 18:11:56,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:56,943 INFO L276 IsEmpty]: Start isEmpty. Operand 14580 states and 52773 transitions. [2022-03-01 18:11:56,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:11:56,975 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:11:56,976 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:11:56,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-01 18:11:57,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-03-01 18:11:57,197 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:11:57,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:11:57,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1602758267, now seen corresponding path program 50 times [2022-03-01 18:11:57,197 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:11:57,197 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221832475] [2022-03-01 18:11:57,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:11:57,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:11:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:11:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:57,372 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:11:57,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221832475] [2022-03-01 18:11:57,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221832475] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:11:57,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307639341] [2022-03-01 18:11:57,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:11:57,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:11:57,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:11:57,374 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:11:57,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-01 18:11:57,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:11:57,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:11:57,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:11:57,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:11:57,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:11:57,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:57,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-01 18:11:57,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-03-01 18:11:57,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-03-01 18:11:57,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-01 18:11:57,947 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:57,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:11:58,154 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:11:58,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 97 [2022-03-01 18:11:58,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:58,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:58,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:11:58,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 83 [2022-03-01 18:11:58,188 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:11:58,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 488 treesize of output 464 [2022-03-01 18:11:58,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:58,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:58,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:58,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 60 [2022-03-01 18:11:58,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:58,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:58,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:58,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-03-01 18:11:58,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:11:58,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:58,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:11:58,572 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:58,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307639341] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:11:58,572 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:11:58,572 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 18:11:58,572 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754959498] [2022-03-01 18:11:58,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:11:58,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:11:58,573 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:11:58,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:11:58,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:11:58,573 INFO L87 Difference]: Start difference. First operand 14580 states and 52773 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:59,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:11:59,201 INFO L93 Difference]: Finished difference Result 15487 states and 55627 transitions. [2022-03-01 18:11:59,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 18:11:59,201 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:11:59,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:11:59,247 INFO L225 Difference]: With dead ends: 15487 [2022-03-01 18:11:59,247 INFO L226 Difference]: Without dead ends: 15454 [2022-03-01 18:11:59,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:11:59,248 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 88 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:11:59,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 274 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:11:59,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15454 states. [2022-03-01 18:11:59,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15454 to 14400. [2022-03-01 18:11:59,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14400 states, 14399 states have (on average 3.621154246822696) internal successors, (52141), 14399 states have internal predecessors, (52141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:59,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14400 states to 14400 states and 52141 transitions. [2022-03-01 18:11:59,536 INFO L78 Accepts]: Start accepts. Automaton has 14400 states and 52141 transitions. Word has length 30 [2022-03-01 18:11:59,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:11:59,536 INFO L470 AbstractCegarLoop]: Abstraction has 14400 states and 52141 transitions. [2022-03-01 18:11:59,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:11:59,536 INFO L276 IsEmpty]: Start isEmpty. Operand 14400 states and 52141 transitions. [2022-03-01 18:11:59,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:11:59,567 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:11:59,567 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:11:59,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-01 18:11:59,789 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,SelfDestructingSolverStorable57 [2022-03-01 18:11:59,789 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:11:59,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:11:59,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1465748903, now seen corresponding path program 51 times [2022-03-01 18:11:59,789 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:11:59,789 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212708941] [2022-03-01 18:11:59,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:11:59,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:11:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:11:59,956 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:59,956 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:11:59,957 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212708941] [2022-03-01 18:11:59,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212708941] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:11:59,957 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942670717] [2022-03-01 18:11:59,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:11:59,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:11:59,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:11:59,965 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:11:59,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-01 18:12:00,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 18:12:00,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:12:00,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-01 18:12:00,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:12:00,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:12:00,208 INFO L353 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2022-03-01 18:12:00,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-01 18:12:00,429 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-01 18:12:00,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 41 [2022-03-01 18:12:00,449 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:12:00,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 83 [2022-03-01 18:12:00,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:12:00,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:12:00,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 51 [2022-03-01 18:12:01,099 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:01,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:12:01,688 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:12:01,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 151 [2022-03-01 18:12:01,731 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:12:01,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 127 [2022-03-01 18:12:01,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:12:01,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:12:01,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 925 treesize of output 861 [2022-03-01 18:12:10,523 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:10,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942670717] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:12:10,523 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:12:10,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 27 [2022-03-01 18:12:10,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774539233] [2022-03-01 18:12:10,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:12:10,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:12:10,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:12:10,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:12:10,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:12:10,524 INFO L87 Difference]: Start difference. First operand 14400 states and 52141 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:16,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:12:16,176 INFO L93 Difference]: Finished difference Result 25864 states and 90108 transitions. [2022-03-01 18:12:16,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-01 18:12:16,177 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:12:16,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:12:16,273 INFO L225 Difference]: With dead ends: 25864 [2022-03-01 18:12:16,274 INFO L226 Difference]: Without dead ends: 25832 [2022-03-01 18:12:16,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2608 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1313, Invalid=6877, Unknown=0, NotChecked=0, Total=8190 [2022-03-01 18:12:16,275 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 290 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 2837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1302 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:12:16,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 680 Invalid, 2837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1500 Invalid, 0 Unknown, 1302 Unchecked, 0.7s Time] [2022-03-01 18:12:16,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25832 states. [2022-03-01 18:12:16,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25832 to 14555. [2022-03-01 18:12:16,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14555 states, 14554 states have (on average 3.6130960560670604) internal successors, (52585), 14554 states have internal predecessors, (52585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:16,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14555 states to 14555 states and 52585 transitions. [2022-03-01 18:12:16,760 INFO L78 Accepts]: Start accepts. Automaton has 14555 states and 52585 transitions. Word has length 30 [2022-03-01 18:12:16,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:12:16,760 INFO L470 AbstractCegarLoop]: Abstraction has 14555 states and 52585 transitions. [2022-03-01 18:12:16,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:16,760 INFO L276 IsEmpty]: Start isEmpty. Operand 14555 states and 52585 transitions. [2022-03-01 18:12:16,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:12:16,793 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:12:16,793 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:12:16,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-01 18:12:17,007 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,SelfDestructingSolverStorable58 [2022-03-01 18:12:17,007 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:12:17,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:12:17,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1700194329, now seen corresponding path program 52 times [2022-03-01 18:12:17,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:12:17,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287978863] [2022-03-01 18:12:17,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:12:17,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:12:17,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:12:17,281 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:17,281 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:12:17,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287978863] [2022-03-01 18:12:17,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287978863] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:12:17,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616313841] [2022-03-01 18:12:17,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:12:17,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:12:17,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:12:17,282 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:12:17,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-01 18:12:17,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:12:17,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:12:17,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:12:17,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:12:17,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:12:17,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:12:17,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-01 18:12:17,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:12:17,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2022-03-01 18:12:17,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:12:17,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2022-03-01 18:12:17,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-03-01 18:12:17,849 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:17,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:12:18,025 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:12:18,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 97 [2022-03-01 18:12:18,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:12:18,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:12:18,041 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:12:18,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 83 [2022-03-01 18:12:18,048 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:12:18,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 878 treesize of output 830 [2022-03-01 18:12:18,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:12:18,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:12:18,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:12:18,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 60 [2022-03-01 18:12:18,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:12:18,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:12:18,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:12:18,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-03-01 18:12:18,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:12:18,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:12:18,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:12:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:18,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616313841] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:12:18,303 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:12:18,303 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 22 [2022-03-01 18:12:18,303 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003500843] [2022-03-01 18:12:18,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:12:18,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 18:12:18,304 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:12:18,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 18:12:18,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:12:18,304 INFO L87 Difference]: Start difference. First operand 14555 states and 52585 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 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) [2022-03-01 18:12:19,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:12:19,181 INFO L93 Difference]: Finished difference Result 19873 states and 70314 transitions. [2022-03-01 18:12:19,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 18:12:19,181 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 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 30 [2022-03-01 18:12:19,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:12:19,233 INFO L225 Difference]: With dead ends: 19873 [2022-03-01 18:12:19,233 INFO L226 Difference]: Without dead ends: 19840 [2022-03-01 18:12:19,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:12:19,234 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 145 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:12:19,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 261 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1344 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:12:19,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19840 states. [2022-03-01 18:12:19,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19840 to 14402. [2022-03-01 18:12:19,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14402 states, 14401 states have (on average 3.616762724810777) internal successors, (52085), 14401 states have internal predecessors, (52085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:19,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14402 states to 14402 states and 52085 transitions. [2022-03-01 18:12:19,548 INFO L78 Accepts]: Start accepts. Automaton has 14402 states and 52085 transitions. Word has length 30 [2022-03-01 18:12:19,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:12:19,548 INFO L470 AbstractCegarLoop]: Abstraction has 14402 states and 52085 transitions. [2022-03-01 18:12:19,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 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) [2022-03-01 18:12:19,548 INFO L276 IsEmpty]: Start isEmpty. Operand 14402 states and 52085 transitions. [2022-03-01 18:12:19,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:12:19,575 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:12:19,575 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:12:19,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-01 18:12:19,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-01 18:12:19,791 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:12:19,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:12:19,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1959107467, now seen corresponding path program 53 times [2022-03-01 18:12:19,791 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:12:19,791 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353330776] [2022-03-01 18:12:19,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:12:19,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:12:19,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:12:19,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:19,828 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:12:19,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353330776] [2022-03-01 18:12:19,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353330776] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:12:19,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483262162] [2022-03-01 18:12:19,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:12:19,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:12:19,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:12:19,829 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:12:19,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-01 18:12:19,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:12:19,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:12:19,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:12:19,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:12:19,929 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:19,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:12:19,986 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:19,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483262162] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:12:19,986 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:12:19,986 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-03-01 18:12:19,986 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130470830] [2022-03-01 18:12:19,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:12:19,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:12:19,986 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:12:19,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:12:19,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:12:19,987 INFO L87 Difference]: Start difference. First operand 14402 states and 52085 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:20,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:12:20,262 INFO L93 Difference]: Finished difference Result 18934 states and 66901 transitions. [2022-03-01 18:12:20,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 18:12:20,263 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 18:12:20,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:12:20,321 INFO L225 Difference]: With dead ends: 18934 [2022-03-01 18:12:20,321 INFO L226 Difference]: Without dead ends: 18868 [2022-03-01 18:12:20,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:12:20,322 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 112 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:12:20,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 199 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:12:20,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18868 states. [2022-03-01 18:12:20,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18868 to 15192. [2022-03-01 18:12:20,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15192 states, 15191 states have (on average 3.615101046672372) internal successors, (54917), 15191 states have internal predecessors, (54917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:20,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15192 states to 15192 states and 54917 transitions. [2022-03-01 18:12:20,718 INFO L78 Accepts]: Start accepts. Automaton has 15192 states and 54917 transitions. Word has length 32 [2022-03-01 18:12:20,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:12:20,718 INFO L470 AbstractCegarLoop]: Abstraction has 15192 states and 54917 transitions. [2022-03-01 18:12:20,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:20,718 INFO L276 IsEmpty]: Start isEmpty. Operand 15192 states and 54917 transitions. [2022-03-01 18:12:20,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:12:20,751 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:12:20,751 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:12:20,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-01 18:12:20,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:12:20,969 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:12:20,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:12:20,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1104567263, now seen corresponding path program 54 times [2022-03-01 18:12:20,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:12:20,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859503389] [2022-03-01 18:12:20,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:12:20,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:12:20,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:12:21,010 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:12:21,010 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:12:21,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859503389] [2022-03-01 18:12:21,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859503389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:12:21,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858115157] [2022-03-01 18:12:21,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:12:21,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:12:21,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:12:21,014 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:12:21,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-01 18:12:21,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 18:12:21,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:12:21,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:12:21,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:12:21,190 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:12:21,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:12:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:12:21,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858115157] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:12:21,235 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:12:21,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-03-01 18:12:21,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971549119] [2022-03-01 18:12:21,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:12:21,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:12:21,235 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:12:21,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:12:21,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:12:21,235 INFO L87 Difference]: Start difference. First operand 15192 states and 54917 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:22,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:12:22,437 INFO L93 Difference]: Finished difference Result 35953 states and 124062 transitions. [2022-03-01 18:12:22,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-01 18:12:22,437 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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 32 [2022-03-01 18:12:22,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:12:22,545 INFO L225 Difference]: With dead ends: 35953 [2022-03-01 18:12:22,545 INFO L226 Difference]: Without dead ends: 35659 [2022-03-01 18:12:22,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3652 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1722, Invalid=7784, Unknown=0, NotChecked=0, Total=9506 [2022-03-01 18:12:22,547 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 578 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:12:22,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 233 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:12:22,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35659 states. [2022-03-01 18:12:23,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35659 to 25698. [2022-03-01 18:12:23,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25698 states, 25697 states have (on average 3.710900105070631) internal successors, (95359), 25697 states have internal predecessors, (95359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:23,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25698 states to 25698 states and 95359 transitions. [2022-03-01 18:12:23,334 INFO L78 Accepts]: Start accepts. Automaton has 25698 states and 95359 transitions. Word has length 32 [2022-03-01 18:12:23,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:12:23,334 INFO L470 AbstractCegarLoop]: Abstraction has 25698 states and 95359 transitions. [2022-03-01 18:12:23,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:23,334 INFO L276 IsEmpty]: Start isEmpty. Operand 25698 states and 95359 transitions. [2022-03-01 18:12:23,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:12:23,379 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:12:23,379 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:12:23,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-01 18:12:23,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:12:23,596 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:12:23,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:12:23,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1606264049, now seen corresponding path program 55 times [2022-03-01 18:12:23,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:12:23,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144306871] [2022-03-01 18:12:23,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:12:23,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:12:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:12:23,637 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:23,637 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:12:23,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144306871] [2022-03-01 18:12:23,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144306871] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:12:23,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028755323] [2022-03-01 18:12:23,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:12:23,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:12:23,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:12:23,638 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:12:23,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-01 18:12:23,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:12:23,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:12:23,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:12:23,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:23,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:12:23,790 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:23,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028755323] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:12:23,790 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:12:23,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-01 18:12:23,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579549140] [2022-03-01 18:12:23,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:12:23,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 18:12:23,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:12:23,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 18:12:23,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:12:23,791 INFO L87 Difference]: Start difference. First operand 25698 states and 95359 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:24,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:12:24,040 INFO L93 Difference]: Finished difference Result 27246 states and 99861 transitions. [2022-03-01 18:12:24,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 18:12:24,040 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 18:12:24,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:12:24,402 INFO L225 Difference]: With dead ends: 27246 [2022-03-01 18:12:24,403 INFO L226 Difference]: Without dead ends: 27222 [2022-03-01 18:12:24,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:12:24,403 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 70 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:12:24,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 119 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:12:24,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27222 states. [2022-03-01 18:12:24,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27222 to 25622. [2022-03-01 18:12:24,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25622 states, 25621 states have (on average 3.71164279302135) internal successors, (95096), 25621 states have internal predecessors, (95096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:25,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25622 states to 25622 states and 95096 transitions. [2022-03-01 18:12:25,029 INFO L78 Accepts]: Start accepts. Automaton has 25622 states and 95096 transitions. Word has length 32 [2022-03-01 18:12:25,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:12:25,029 INFO L470 AbstractCegarLoop]: Abstraction has 25622 states and 95096 transitions. [2022-03-01 18:12:25,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:25,029 INFO L276 IsEmpty]: Start isEmpty. Operand 25622 states and 95096 transitions. [2022-03-01 18:12:25,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:12:25,080 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:12:25,080 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:12:25,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-01 18:12:25,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:12:25,297 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:12:25,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:12:25,297 INFO L85 PathProgramCache]: Analyzing trace with hash 252646705, now seen corresponding path program 56 times [2022-03-01 18:12:25,297 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:12:25,297 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332764208] [2022-03-01 18:12:25,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:12:25,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:12:25,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:12:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:12:25,331 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:12:25,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332764208] [2022-03-01 18:12:25,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332764208] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:12:25,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530866624] [2022-03-01 18:12:25,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:12:25,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:12:25,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:12:25,332 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:12:25,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-01 18:12:25,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:12:25,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:12:25,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:12:25,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:12:25,445 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:12:25,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:12:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:12:25,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530866624] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:12:25,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:12:25,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2022-03-01 18:12:25,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213066501] [2022-03-01 18:12:25,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:12:25,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 18:12:25,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:12:25,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 18:12:25,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-01 18:12:25,496 INFO L87 Difference]: Start difference. First operand 25622 states and 95096 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:27,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:12:27,066 INFO L93 Difference]: Finished difference Result 79810 states and 282459 transitions. [2022-03-01 18:12:27,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-01 18:12:27,091 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 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 32 [2022-03-01 18:12:27,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:12:27,606 INFO L225 Difference]: With dead ends: 79810 [2022-03-01 18:12:27,607 INFO L226 Difference]: Without dead ends: 79786 [2022-03-01 18:12:27,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2018 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1390, Invalid=4160, Unknown=0, NotChecked=0, Total=5550 [2022-03-01 18:12:27,607 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 494 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:12:27,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 250 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:12:27,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79786 states. [2022-03-01 18:12:28,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79786 to 35022. [2022-03-01 18:12:28,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35022 states, 35021 states have (on average 3.7379572256646014) internal successors, (130907), 35021 states have internal predecessors, (130907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:29,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35022 states to 35022 states and 130907 transitions. [2022-03-01 18:12:29,011 INFO L78 Accepts]: Start accepts. Automaton has 35022 states and 130907 transitions. Word has length 32 [2022-03-01 18:12:29,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:12:29,011 INFO L470 AbstractCegarLoop]: Abstraction has 35022 states and 130907 transitions. [2022-03-01 18:12:29,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:29,011 INFO L276 IsEmpty]: Start isEmpty. Operand 35022 states and 130907 transitions. [2022-03-01 18:12:29,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:12:29,066 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:12:29,067 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:12:29,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-01 18:12:29,275 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,SelfDestructingSolverStorable63 [2022-03-01 18:12:29,275 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:12:29,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:12:29,276 INFO L85 PathProgramCache]: Analyzing trace with hash 58249501, now seen corresponding path program 57 times [2022-03-01 18:12:29,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:12:29,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865615493] [2022-03-01 18:12:29,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:12:29,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:12:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:12:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:12:29,445 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:12:29,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865615493] [2022-03-01 18:12:29,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865615493] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:12:29,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065434713] [2022-03-01 18:12:29,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:12:29,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:12:29,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:12:29,446 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:12:29,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-01 18:12:29,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-01 18:12:29,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:12:29,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 18:12:29,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:12:29,545 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:29,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:12:29,580 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:29,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065434713] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:12:29,580 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:12:29,580 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 10 [2022-03-01 18:12:29,580 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038626368] [2022-03-01 18:12:29,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:12:29,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 18:12:29,580 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:12:29,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 18:12:29,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:12:29,581 INFO L87 Difference]: Start difference. First operand 35022 states and 130907 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:30,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:12:30,553 INFO L93 Difference]: Finished difference Result 88617 states and 320525 transitions. [2022-03-01 18:12:30,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 18:12:30,554 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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 32 [2022-03-01 18:12:30,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:12:31,039 INFO L225 Difference]: With dead ends: 88617 [2022-03-01 18:12:31,039 INFO L226 Difference]: Without dead ends: 88165 [2022-03-01 18:12:31,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=478, Invalid=1592, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 18:12:31,040 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 596 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:12:31,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [596 Valid, 158 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:12:31,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88165 states. [2022-03-01 18:12:33,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88165 to 53900. [2022-03-01 18:12:33,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53900 states, 53899 states have (on average 3.7885860591105587) internal successors, (204201), 53899 states have internal predecessors, (204201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:33,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53900 states to 53900 states and 204201 transitions. [2022-03-01 18:12:33,614 INFO L78 Accepts]: Start accepts. Automaton has 53900 states and 204201 transitions. Word has length 32 [2022-03-01 18:12:33,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:12:33,614 INFO L470 AbstractCegarLoop]: Abstraction has 53900 states and 204201 transitions. [2022-03-01 18:12:33,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:33,614 INFO L276 IsEmpty]: Start isEmpty. Operand 53900 states and 204201 transitions. [2022-03-01 18:12:33,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:12:33,704 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:12:33,704 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:12:33,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-01 18:12:33,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-01 18:12:33,921 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:12:33,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:12:33,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1948005981, now seen corresponding path program 58 times [2022-03-01 18:12:33,921 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:12:33,921 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35774603] [2022-03-01 18:12:33,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:12:33,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:12:34,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:12:34,120 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:12:34,121 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:12:34,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35774603] [2022-03-01 18:12:34,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35774603] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:12:34,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870037007] [2022-03-01 18:12:34,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:12:34,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:12:34,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:12:34,126 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:12:34,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-01 18:12:34,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:12:34,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:12:34,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:12:34,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:12:34,241 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:34,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:12:34,293 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:34,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870037007] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:12:34,294 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:12:34,294 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-03-01 18:12:34,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343101532] [2022-03-01 18:12:34,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:12:34,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 18:12:34,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:12:34,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 18:12:34,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-01 18:12:34,294 INFO L87 Difference]: Start difference. First operand 53900 states and 204201 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:36,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:12:36,164 INFO L93 Difference]: Finished difference Result 126257 states and 472403 transitions. [2022-03-01 18:12:36,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-01 18:12:36,165 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 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 32 [2022-03-01 18:12:36,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:12:36,931 INFO L225 Difference]: With dead ends: 126257 [2022-03-01 18:12:36,932 INFO L226 Difference]: Without dead ends: 125683 [2022-03-01 18:12:36,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1721 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=908, Invalid=3784, Unknown=0, NotChecked=0, Total=4692 [2022-03-01 18:12:36,935 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 752 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:12:36,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [752 Valid, 151 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:12:37,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125683 states. [2022-03-01 18:12:40,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125683 to 99474. [2022-03-01 18:12:40,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99474 states, 99473 states have (on average 3.860756185095453) internal successors, (384041), 99473 states have internal predecessors, (384041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:41,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99474 states to 99474 states and 384041 transitions. [2022-03-01 18:12:41,452 INFO L78 Accepts]: Start accepts. Automaton has 99474 states and 384041 transitions. Word has length 32 [2022-03-01 18:12:41,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:12:41,453 INFO L470 AbstractCegarLoop]: Abstraction has 99474 states and 384041 transitions. [2022-03-01 18:12:41,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:41,453 INFO L276 IsEmpty]: Start isEmpty. Operand 99474 states and 384041 transitions. [2022-03-01 18:12:41,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:12:41,809 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:12:41,809 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:12:41,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-01 18:12:42,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:12:42,025 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:12:42,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:12:42,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1979731235, now seen corresponding path program 59 times [2022-03-01 18:12:42,025 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:12:42,025 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133799623] [2022-03-01 18:12:42,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:12:42,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:12:42,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:12:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:12:42,054 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:12:42,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133799623] [2022-03-01 18:12:42,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133799623] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:12:42,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390237632] [2022-03-01 18:12:42,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:12:42,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:12:42,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:12:42,072 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:12:42,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-01 18:12:42,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 18:12:42,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:12:42,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:12:42,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:12:42,168 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:12:42,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:12:42,222 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:12:42,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390237632] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:12:42,223 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:12:42,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-01 18:12:42,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268612689] [2022-03-01 18:12:42,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:12:42,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 18:12:42,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:12:42,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 18:12:42,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:12:42,223 INFO L87 Difference]: Start difference. First operand 99474 states and 384041 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:43,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:12:43,714 INFO L93 Difference]: Finished difference Result 125056 states and 477423 transitions. [2022-03-01 18:12:43,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 18:12:43,717 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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 32 [2022-03-01 18:12:43,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:12:44,404 INFO L225 Difference]: With dead ends: 125056 [2022-03-01 18:12:44,404 INFO L226 Difference]: Without dead ends: 125056 [2022-03-01 18:12:44,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:12:44,406 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 92 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:12:44,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 60 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:12:44,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125056 states. [2022-03-01 18:12:47,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125056 to 106002. [2022-03-01 18:12:47,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106002 states, 106001 states have (on average 3.8668974820992257) internal successors, (409895), 106001 states have internal predecessors, (409895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:48,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106002 states to 106002 states and 409895 transitions. [2022-03-01 18:12:48,810 INFO L78 Accepts]: Start accepts. Automaton has 106002 states and 409895 transitions. Word has length 32 [2022-03-01 18:12:48,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:12:48,811 INFO L470 AbstractCegarLoop]: Abstraction has 106002 states and 409895 transitions. [2022-03-01 18:12:48,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:48,811 INFO L276 IsEmpty]: Start isEmpty. Operand 106002 states and 409895 transitions. [2022-03-01 18:12:48,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:12:48,967 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:12:48,968 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:12:48,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-01 18:12:49,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:12:49,172 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:12:49,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:12:49,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1813915461, now seen corresponding path program 60 times [2022-03-01 18:12:49,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:12:49,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729488024] [2022-03-01 18:12:49,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:12:49,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:12:49,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:12:49,214 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 18:12:49,214 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:12:49,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729488024] [2022-03-01 18:12:49,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729488024] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:12:49,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443416790] [2022-03-01 18:12:49,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:12:49,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:12:49,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:12:49,236 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:12:49,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-01 18:12:49,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 18:12:49,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:12:49,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:12:49,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:12:49,379 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 18:12:49,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:12:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 18:12:49,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443416790] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:12:49,429 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:12:49,429 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-01 18:12:49,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403000878] [2022-03-01 18:12:49,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:12:49,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 18:12:49,430 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:12:49,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 18:12:49,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:12:49,430 INFO L87 Difference]: Start difference. First operand 106002 states and 409895 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:51,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:12:51,787 INFO L93 Difference]: Finished difference Result 147426 states and 553881 transitions. [2022-03-01 18:12:51,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-01 18:12:51,787 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 32 [2022-03-01 18:12:51,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:12:52,881 INFO L225 Difference]: With dead ends: 147426 [2022-03-01 18:12:52,881 INFO L226 Difference]: Without dead ends: 147296 [2022-03-01 18:12:52,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=684, Invalid=2738, Unknown=0, NotChecked=0, Total=3422 [2022-03-01 18:12:52,882 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 499 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:12:52,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 199 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:12:53,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147296 states. [2022-03-01 18:12:56,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147296 to 112553. [2022-03-01 18:12:56,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112553 states, 112552 states have (on average 3.8479991470609143) internal successors, (433100), 112552 states have internal predecessors, (433100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:57,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112553 states to 112553 states and 433100 transitions. [2022-03-01 18:12:57,653 INFO L78 Accepts]: Start accepts. Automaton has 112553 states and 433100 transitions. Word has length 32 [2022-03-01 18:12:57,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:12:57,653 INFO L470 AbstractCegarLoop]: Abstraction has 112553 states and 433100 transitions. [2022-03-01 18:12:57,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:57,653 INFO L276 IsEmpty]: Start isEmpty. Operand 112553 states and 433100 transitions. [2022-03-01 18:12:57,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:12:57,798 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:12:57,798 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:12:57,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-01 18:12:58,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-01 18:12:58,005 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:12:58,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:12:58,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1955119675, now seen corresponding path program 61 times [2022-03-01 18:12:58,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:12:58,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51050033] [2022-03-01 18:12:58,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:12:58,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:12:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:12:58,035 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:58,035 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:12:58,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51050033] [2022-03-01 18:12:58,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51050033] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:12:58,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971469061] [2022-03-01 18:12:58,035 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:12:58,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:12:58,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:12:58,036 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:12:58,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-01 18:12:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:12:58,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:12:58,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:12:58,158 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:12:58,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:12:58,207 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:12:58,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971469061] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:12:58,207 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:12:58,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-01 18:12:58,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568847563] [2022-03-01 18:12:58,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:12:58,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 18:12:58,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:12:58,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 18:12:58,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:12:58,208 INFO L87 Difference]: Start difference. First operand 112553 states and 433100 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:12:59,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:12:59,731 INFO L93 Difference]: Finished difference Result 128721 states and 491820 transitions. [2022-03-01 18:12:59,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 18:12:59,731 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 18:12:59,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:13:00,337 INFO L225 Difference]: With dead ends: 128721 [2022-03-01 18:13:00,338 INFO L226 Difference]: Without dead ends: 128703 [2022-03-01 18:13:00,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:13:00,338 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 108 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:13:00,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 88 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:13:00,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128703 states. [2022-03-01 18:13:03,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128703 to 119800. [2022-03-01 18:13:03,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119800 states, 119799 states have (on average 3.8597901484987354) internal successors, (462399), 119799 states have internal predecessors, (462399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:05,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119800 states to 119800 states and 462399 transitions. [2022-03-01 18:13:05,058 INFO L78 Accepts]: Start accepts. Automaton has 119800 states and 462399 transitions. Word has length 32 [2022-03-01 18:13:05,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:13:05,059 INFO L470 AbstractCegarLoop]: Abstraction has 119800 states and 462399 transitions. [2022-03-01 18:13:05,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:05,059 INFO L276 IsEmpty]: Start isEmpty. Operand 119800 states and 462399 transitions. [2022-03-01 18:13:05,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:13:05,324 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:13:05,324 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:13:05,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-01 18:13:05,540 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,SelfDestructingSolverStorable68 [2022-03-01 18:13:05,540 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:13:05,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:13:05,540 INFO L85 PathProgramCache]: Analyzing trace with hash -804316941, now seen corresponding path program 62 times [2022-03-01 18:13:05,541 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:13:05,541 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226704067] [2022-03-01 18:13:05,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:13:05,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:13:05,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:13:05,589 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:13:05,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:13:05,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226704067] [2022-03-01 18:13:05,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226704067] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:13:05,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627152474] [2022-03-01 18:13:05,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:13:05,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:13:05,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:13:05,591 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:13:05,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-01 18:13:05,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:13:05,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:13:05,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:13:05,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:13:05,736 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:13:05,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:13:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:13:05,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627152474] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:13:05,790 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:13:05,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2022-03-01 18:13:05,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473158629] [2022-03-01 18:13:05,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:13:05,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 18:13:05,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:13:05,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 18:13:05,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-03-01 18:13:05,790 INFO L87 Difference]: Start difference. First operand 119800 states and 462399 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:10,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:13:10,509 INFO L93 Difference]: Finished difference Result 306930 states and 1138918 transitions. [2022-03-01 18:13:10,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-01 18:13:10,509 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 18:13:10,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:13:12,606 INFO L225 Difference]: With dead ends: 306930 [2022-03-01 18:13:12,607 INFO L226 Difference]: Without dead ends: 306766 [2022-03-01 18:13:12,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2280 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1270, Invalid=4430, Unknown=0, NotChecked=0, Total=5700 [2022-03-01 18:13:12,616 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 504 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:13:12,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 280 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:13:12,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306766 states. [2022-03-01 18:13:22,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306766 to 209656. [2022-03-01 18:13:23,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209656 states, 209655 states have (on average 3.8897665211895736) internal successors, (815509), 209655 states have internal predecessors, (815509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:25,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209656 states to 209656 states and 815509 transitions. [2022-03-01 18:13:25,306 INFO L78 Accepts]: Start accepts. Automaton has 209656 states and 815509 transitions. Word has length 32 [2022-03-01 18:13:25,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:13:25,306 INFO L470 AbstractCegarLoop]: Abstraction has 209656 states and 815509 transitions. [2022-03-01 18:13:25,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:25,306 INFO L276 IsEmpty]: Start isEmpty. Operand 209656 states and 815509 transitions. [2022-03-01 18:13:25,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:13:25,928 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:13:25,928 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:13:25,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-01 18:13:26,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:13:26,143 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:13:26,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:13:26,144 INFO L85 PathProgramCache]: Analyzing trace with hash -593546441, now seen corresponding path program 63 times [2022-03-01 18:13:26,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:13:26,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693032377] [2022-03-01 18:13:26,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:13:26,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:13:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:13:26,193 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:13:26,193 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:13:26,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693032377] [2022-03-01 18:13:26,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693032377] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:13:26,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109987339] [2022-03-01 18:13:26,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:13:26,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:13:26,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:13:26,194 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:13:26,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-01 18:13:26,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-01 18:13:26,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:13:26,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:13:26,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:13:26,329 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:13:26,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:13:26,385 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:13:26,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109987339] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:13:26,385 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:13:26,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 13 [2022-03-01 18:13:26,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581501974] [2022-03-01 18:13:26,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:13:26,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 18:13:26,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:13:26,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 18:13:26,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:13:26,386 INFO L87 Difference]: Start difference. First operand 209656 states and 815509 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:31,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:13:31,245 INFO L93 Difference]: Finished difference Result 304768 states and 1123004 transitions. [2022-03-01 18:13:31,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-01 18:13:31,246 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 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 32 [2022-03-01 18:13:31,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:13:33,769 INFO L225 Difference]: With dead ends: 304768 [2022-03-01 18:13:33,770 INFO L226 Difference]: Without dead ends: 304472 [2022-03-01 18:13:33,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1993 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1313, Invalid=3943, Unknown=0, NotChecked=0, Total=5256 [2022-03-01 18:13:33,770 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 625 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:13:33,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [625 Valid, 353 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:13:34,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304472 states. [2022-03-01 18:13:42,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304472 to 149380. [2022-03-01 18:13:42,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149380 states, 149379 states have (on average 3.857938532189933) internal successors, (576295), 149379 states have internal predecessors, (576295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:43,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149380 states to 149380 states and 576295 transitions. [2022-03-01 18:13:43,767 INFO L78 Accepts]: Start accepts. Automaton has 149380 states and 576295 transitions. Word has length 32 [2022-03-01 18:13:43,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:13:43,767 INFO L470 AbstractCegarLoop]: Abstraction has 149380 states and 576295 transitions. [2022-03-01 18:13:43,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:43,767 INFO L276 IsEmpty]: Start isEmpty. Operand 149380 states and 576295 transitions. [2022-03-01 18:13:43,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:13:43,943 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:13:43,944 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:13:43,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-01 18:13:44,160 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,SelfDestructingSolverStorable70 [2022-03-01 18:13:44,160 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:13:44,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:13:44,160 INFO L85 PathProgramCache]: Analyzing trace with hash 785955533, now seen corresponding path program 64 times [2022-03-01 18:13:44,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:13:44,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950424712] [2022-03-01 18:13:44,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:13:44,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:13:44,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:13:44,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:13:44,198 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:13:44,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950424712] [2022-03-01 18:13:44,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950424712] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:13:44,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566589180] [2022-03-01 18:13:44,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:13:44,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:13:44,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:13:44,200 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:13:44,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-01 18:13:44,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:13:44,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:13:44,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:13:44,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:13:44,298 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:13:44,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:13:44,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:13:44,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566589180] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:13:44,351 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:13:44,351 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-03-01 18:13:44,351 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324881034] [2022-03-01 18:13:44,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:13:44,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-01 18:13:44,352 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:13:44,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-01 18:13:44,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-03-01 18:13:44,352 INFO L87 Difference]: Start difference. First operand 149380 states and 576295 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:46,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:13:46,458 INFO L93 Difference]: Finished difference Result 159580 states and 608890 transitions. [2022-03-01 18:13:46,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 18:13:46,459 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 18:13:46,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:13:48,254 INFO L225 Difference]: With dead ends: 159580 [2022-03-01 18:13:48,254 INFO L226 Difference]: Without dead ends: 159562 [2022-03-01 18:13:48,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:13:48,255 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 113 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:13:48,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 136 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:13:48,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159562 states. [2022-03-01 18:13:54,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159562 to 148130. [2022-03-01 18:13:54,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148130 states, 148129 states have (on average 3.840368867676147) internal successors, (568870), 148129 states have internal predecessors, (568870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:55,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148130 states to 148130 states and 568870 transitions. [2022-03-01 18:13:55,832 INFO L78 Accepts]: Start accepts. Automaton has 148130 states and 568870 transitions. Word has length 32 [2022-03-01 18:13:55,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:13:55,832 INFO L470 AbstractCegarLoop]: Abstraction has 148130 states and 568870 transitions. [2022-03-01 18:13:55,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:55,832 INFO L276 IsEmpty]: Start isEmpty. Operand 148130 states and 568870 transitions. [2022-03-01 18:13:56,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:13:56,006 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:13:56,006 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:13:56,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-01 18:13:56,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:13:56,223 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:13:56,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:13:56,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1387084889, now seen corresponding path program 65 times [2022-03-01 18:13:56,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:13:56,223 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347627150] [2022-03-01 18:13:56,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:13:56,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:13:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:13:56,688 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:13:56,689 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:13:56,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347627150] [2022-03-01 18:13:56,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347627150] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:13:56,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114554385] [2022-03-01 18:13:56,689 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:13:56,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:13:56,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:13:56,691 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:13:56,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-01 18:13:56,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 18:13:56,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:13:56,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:13:56,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:13:56,807 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:13:56,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:13:56,864 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:13:56,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114554385] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:13:56,864 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:13:56,864 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-03-01 18:13:56,864 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308065202] [2022-03-01 18:13:56,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:13:56,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:13:56,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:13:56,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:13:56,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:13:56,865 INFO L87 Difference]: Start difference. First operand 148130 states and 568870 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:58,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:13:58,590 INFO L93 Difference]: Finished difference Result 164627 states and 624211 transitions. [2022-03-01 18:13:58,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 18:13:58,590 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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 32 [2022-03-01 18:13:58,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:13:59,958 INFO L225 Difference]: With dead ends: 164627 [2022-03-01 18:13:59,958 INFO L226 Difference]: Without dead ends: 164471 [2022-03-01 18:13:59,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:13:59,959 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 204 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:13:59,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 57 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:14:00,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164471 states. [2022-03-01 18:14:05,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164471 to 155402. [2022-03-01 18:14:05,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155402 states, 155401 states have (on average 3.8356831680619816) internal successors, (596069), 155401 states have internal predecessors, (596069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:06,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155402 states to 155402 states and 596069 transitions. [2022-03-01 18:14:06,701 INFO L78 Accepts]: Start accepts. Automaton has 155402 states and 596069 transitions. Word has length 32 [2022-03-01 18:14:06,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:06,702 INFO L470 AbstractCegarLoop]: Abstraction has 155402 states and 596069 transitions. [2022-03-01 18:14:06,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:06,702 INFO L276 IsEmpty]: Start isEmpty. Operand 155402 states and 596069 transitions. [2022-03-01 18:14:06,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:14:06,910 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:06,910 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:14:06,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-01 18:14:07,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:07,131 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:14:07,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:07,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1733314855, now seen corresponding path program 66 times [2022-03-01 18:14:07,131 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:07,131 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123296516] [2022-03-01 18:14:07,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:07,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:07,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:14:07,159 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:07,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123296516] [2022-03-01 18:14:07,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123296516] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:07,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961913166] [2022-03-01 18:14:07,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:14:07,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:07,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:07,161 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:14:07,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-01 18:14:07,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 18:14:07,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:14:07,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:14:07,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:07,260 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:14:07,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:07,313 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:14:07,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961913166] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:14:07,313 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:14:07,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-01 18:14:07,314 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076922005] [2022-03-01 18:14:07,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:14:07,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 18:14:07,314 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:07,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 18:14:07,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:14:07,314 INFO L87 Difference]: Start difference. First operand 155402 states and 596069 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:10,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:10,361 INFO L93 Difference]: Finished difference Result 181166 states and 684577 transitions. [2022-03-01 18:14:10,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 18:14:10,361 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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 32 [2022-03-01 18:14:10,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:11,394 INFO L225 Difference]: With dead ends: 181166 [2022-03-01 18:14:11,394 INFO L226 Difference]: Without dead ends: 181166 [2022-03-01 18:14:11,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:14:11,395 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 129 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:11,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 58 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:14:12,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181166 states. [2022-03-01 18:14:17,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181166 to 155312. [2022-03-01 18:14:17,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155312 states, 155311 states have (on average 3.8357875488535904) internal successors, (595740), 155311 states have internal predecessors, (595740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:19,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155312 states to 155312 states and 595740 transitions. [2022-03-01 18:14:19,017 INFO L78 Accepts]: Start accepts. Automaton has 155312 states and 595740 transitions. Word has length 32 [2022-03-01 18:14:19,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:19,017 INFO L470 AbstractCegarLoop]: Abstraction has 155312 states and 595740 transitions. [2022-03-01 18:14:19,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:19,018 INFO L276 IsEmpty]: Start isEmpty. Operand 155312 states and 595740 transitions. [2022-03-01 18:14:19,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:14:19,199 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:19,199 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:14:19,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-01 18:14:19,415 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,SelfDestructingSolverStorable73 [2022-03-01 18:14:19,416 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:14:19,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:19,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1439066337, now seen corresponding path program 67 times [2022-03-01 18:14:19,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:19,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047492202] [2022-03-01 18:14:19,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:19,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:19,449 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:14:19,450 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:19,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047492202] [2022-03-01 18:14:19,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047492202] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:19,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267341127] [2022-03-01 18:14:19,450 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:14:19,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:19,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:19,451 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:14:19,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-01 18:14:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:19,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:14:19,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:19,578 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:19,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:19,633 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:19,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267341127] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:14:19,634 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:14:19,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-01 18:14:19,634 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454413494] [2022-03-01 18:14:19,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:14:19,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 18:14:19,634 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:19,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 18:14:19,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:14:19,634 INFO L87 Difference]: Start difference. First operand 155312 states and 595740 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:23,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:23,211 INFO L93 Difference]: Finished difference Result 226844 states and 855043 transitions. [2022-03-01 18:14:23,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-01 18:14:23,212 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 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 32 [2022-03-01 18:14:23,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:25,844 INFO L225 Difference]: With dead ends: 226844 [2022-03-01 18:14:25,844 INFO L226 Difference]: Without dead ends: 226494 [2022-03-01 18:14:25,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2711 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1367, Invalid=5605, Unknown=0, NotChecked=0, Total=6972 [2022-03-01 18:14:25,844 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 741 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 1143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:25,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [741 Valid, 195 Invalid, 1143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:14:26,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226494 states. [2022-03-01 18:14:34,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226494 to 172378. [2022-03-01 18:14:34,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172378 states, 172377 states have (on average 3.8375131253009394) internal successors, (661499), 172377 states have internal predecessors, (661499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:36,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172378 states to 172378 states and 661499 transitions. [2022-03-01 18:14:36,775 INFO L78 Accepts]: Start accepts. Automaton has 172378 states and 661499 transitions. Word has length 32 [2022-03-01 18:14:36,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:36,776 INFO L470 AbstractCegarLoop]: Abstraction has 172378 states and 661499 transitions. [2022-03-01 18:14:36,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:36,776 INFO L276 IsEmpty]: Start isEmpty. Operand 172378 states and 661499 transitions. [2022-03-01 18:14:37,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:14:37,008 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:37,009 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:14:37,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-01 18:14:37,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:37,226 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:14:37,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:37,226 INFO L85 PathProgramCache]: Analyzing trace with hash -957000355, now seen corresponding path program 68 times [2022-03-01 18:14:37,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:37,227 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063446834] [2022-03-01 18:14:37,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:37,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:37,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:37,256 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:14:37,256 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:37,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063446834] [2022-03-01 18:14:37,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063446834] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:37,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670070396] [2022-03-01 18:14:37,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:14:37,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:37,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:37,258 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:14:37,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-01 18:14:37,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:14:37,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:14:37,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:14:37,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:37,357 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 18:14:37,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:37,412 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 18:14:37,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670070396] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:14:37,412 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:14:37,412 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-01 18:14:37,412 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057761315] [2022-03-01 18:14:37,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:14:37,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 18:14:37,413 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:37,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 18:14:37,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:14:37,413 INFO L87 Difference]: Start difference. First operand 172378 states and 661499 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:40,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:40,187 INFO L93 Difference]: Finished difference Result 180248 states and 686520 transitions. [2022-03-01 18:14:40,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 18:14:40,188 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 32 [2022-03-01 18:14:40,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:41,489 INFO L225 Difference]: With dead ends: 180248 [2022-03-01 18:14:41,489 INFO L226 Difference]: Without dead ends: 180232 [2022-03-01 18:14:41,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:14:41,489 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 112 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:41,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 95 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:14:42,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180232 states. [2022-03-01 18:14:48,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180232 to 172711. [2022-03-01 18:14:48,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172711 states, 172710 states have (on average 3.8327543280643854) internal successors, (661955), 172710 states have internal predecessors, (661955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:50,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172711 states to 172711 states and 661955 transitions. [2022-03-01 18:14:50,688 INFO L78 Accepts]: Start accepts. Automaton has 172711 states and 661955 transitions. Word has length 32 [2022-03-01 18:14:50,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:50,688 INFO L470 AbstractCegarLoop]: Abstraction has 172711 states and 661955 transitions. [2022-03-01 18:14:50,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:50,688 INFO L276 IsEmpty]: Start isEmpty. Operand 172711 states and 661955 transitions. [2022-03-01 18:14:51,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:14:51,059 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:51,059 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:14:51,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-01 18:14:51,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:51,277 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:14:51,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:51,278 INFO L85 PathProgramCache]: Analyzing trace with hash 851154315, now seen corresponding path program 69 times [2022-03-01 18:14:51,278 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:51,278 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670498701] [2022-03-01 18:14:51,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:51,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:51,310 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:14:51,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:51,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670498701] [2022-03-01 18:14:51,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670498701] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:51,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076303747] [2022-03-01 18:14:51,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:14:51,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:51,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:51,328 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:14:51,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-01 18:14:51,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:14:51,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:14:51,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:14:51,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:14:51,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:51,519 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:14:51,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076303747] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:14:51,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:14:51,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-03-01 18:14:51,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194898430] [2022-03-01 18:14:51,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:14:51,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:14:51,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:51,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:14:51,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:14:51,520 INFO L87 Difference]: Start difference. First operand 172711 states and 661955 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:54,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:54,621 INFO L93 Difference]: Finished difference Result 248684 states and 950787 transitions. [2022-03-01 18:14:54,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 18:14:54,635 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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 33 [2022-03-01 18:14:54,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:57,189 INFO L225 Difference]: With dead ends: 248684 [2022-03-01 18:14:57,189 INFO L226 Difference]: Without dead ends: 246168 [2022-03-01 18:14:57,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:14:57,189 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 167 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:57,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 67 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:14:57,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246168 states. [2022-03-01 18:15:05,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246168 to 240164. [2022-03-01 18:15:06,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240164 states, 240163 states have (on average 3.7435783197245205) internal successors, (899069), 240163 states have internal predecessors, (899069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:08,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240164 states to 240164 states and 899069 transitions. [2022-03-01 18:15:08,939 INFO L78 Accepts]: Start accepts. Automaton has 240164 states and 899069 transitions. Word has length 33 [2022-03-01 18:15:08,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:08,939 INFO L470 AbstractCegarLoop]: Abstraction has 240164 states and 899069 transitions. [2022-03-01 18:15:08,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:08,939 INFO L276 IsEmpty]: Start isEmpty. Operand 240164 states and 899069 transitions. [2022-03-01 18:15:09,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:15:09,372 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:09,372 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:09,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-01 18:15:09,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:09,588 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:09,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:09,588 INFO L85 PathProgramCache]: Analyzing trace with hash -874131995, now seen corresponding path program 70 times [2022-03-01 18:15:09,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:09,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639552433] [2022-03-01 18:15:09,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:09,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:09,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:09,643 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 18:15:09,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:09,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639552433] [2022-03-01 18:15:09,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639552433] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:09,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322291804] [2022-03-01 18:15:09,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:15:09,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:09,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:09,652 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:15:09,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-01 18:15:09,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:15:09,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:09,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 18:15:09,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-01 18:15:09,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-01 18:15:09,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322291804] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:09,852 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:09,852 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-01 18:15:09,852 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021600153] [2022-03-01 18:15:09,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:09,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 18:15:09,852 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:09,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 18:15:09,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:15:09,853 INFO L87 Difference]: Start difference. First operand 240164 states and 899069 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:14,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:14,755 INFO L93 Difference]: Finished difference Result 366756 states and 1359341 transitions. [2022-03-01 18:15:14,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 18:15:14,756 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 18:15:14,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:17,516 INFO L225 Difference]: With dead ends: 366756 [2022-03-01 18:15:17,517 INFO L226 Difference]: Without dead ends: 365198 [2022-03-01 18:15:17,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:15:17,517 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 100 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:17,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 48 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:15:17,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365198 states. [2022-03-01 18:15:29,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365198 to 337452. [2022-03-01 18:15:29,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337452 states, 337451 states have (on average 3.7411861277637346) internal successors, (1262467), 337451 states have internal predecessors, (1262467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:32,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337452 states to 337452 states and 1262467 transitions. [2022-03-01 18:15:32,529 INFO L78 Accepts]: Start accepts. Automaton has 337452 states and 1262467 transitions. Word has length 33 [2022-03-01 18:15:32,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:32,529 INFO L470 AbstractCegarLoop]: Abstraction has 337452 states and 1262467 transitions. [2022-03-01 18:15:32,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:32,530 INFO L276 IsEmpty]: Start isEmpty. Operand 337452 states and 1262467 transitions. [2022-03-01 18:15:33,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:15:33,450 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:33,450 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:33,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:33,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-01 18:15:33,664 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:33,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:33,664 INFO L85 PathProgramCache]: Analyzing trace with hash 257831969, now seen corresponding path program 71 times [2022-03-01 18:15:33,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:33,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902806491] [2022-03-01 18:15:33,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:33,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:33,716 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-01 18:15:33,716 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:33,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902806491] [2022-03-01 18:15:33,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902806491] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:33,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642033167] [2022-03-01 18:15:33,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:15:33,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:33,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:33,718 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:15:33,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-01 18:15:33,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 18:15:33,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:33,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 18:15:33,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-01 18:15:33,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:33,913 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-01 18:15:33,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642033167] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:33,914 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:33,914 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-01 18:15:33,914 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725424002] [2022-03-01 18:15:33,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:33,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:15:33,914 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:33,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:15:33,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:15:33,915 INFO L87 Difference]: Start difference. First operand 337452 states and 1262467 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:38,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:38,696 INFO L93 Difference]: Finished difference Result 366031 states and 1351232 transitions. [2022-03-01 18:15:38,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 18:15:38,696 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 18:15:38,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:41,479 INFO L225 Difference]: With dead ends: 366031 [2022-03-01 18:15:41,479 INFO L226 Difference]: Without dead ends: 365962 [2022-03-01 18:15:41,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:15:41,480 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 84 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:41,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 62 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:15:42,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365962 states. [2022-03-01 18:15:52,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365962 to 335889. [2022-03-01 18:15:53,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335889 states, 335888 states have (on average 3.7307703758395654) internal successors, (1253121), 335888 states have internal predecessors, (1253121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:57,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335889 states to 335889 states and 1253121 transitions. [2022-03-01 18:15:57,623 INFO L78 Accepts]: Start accepts. Automaton has 335889 states and 1253121 transitions. Word has length 33 [2022-03-01 18:15:57,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:57,623 INFO L470 AbstractCegarLoop]: Abstraction has 335889 states and 1253121 transitions. [2022-03-01 18:15:57,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:57,623 INFO L276 IsEmpty]: Start isEmpty. Operand 335889 states and 1253121 transitions. [2022-03-01 18:15:58,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:15:58,295 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:58,295 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:58,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:58,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:58,512 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:58,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:58,512 INFO L85 PathProgramCache]: Analyzing trace with hash -2021221787, now seen corresponding path program 72 times [2022-03-01 18:15:58,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:58,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938391669] [2022-03-01 18:15:58,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:58,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:58,556 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:58,556 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:58,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938391669] [2022-03-01 18:15:58,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938391669] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:58,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427168448] [2022-03-01 18:15:58,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:15:58,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:58,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:58,568 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:15:58,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-01 18:15:58,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:15:58,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:58,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 18:15:58,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:58,747 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:15:58,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:58,804 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:15:58,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427168448] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:58,805 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:58,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 11 [2022-03-01 18:15:58,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643935949] [2022-03-01 18:15:58,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:58,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 18:15:58,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:58,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 18:15:58,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-01 18:15:58,806 INFO L87 Difference]: Start difference. First operand 335889 states and 1253121 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:01,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:01,303 INFO L93 Difference]: Finished difference Result 174680 states and 650006 transitions. [2022-03-01 18:16:01,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 18:16:01,304 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 18:16:01,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:02,847 INFO L225 Difference]: With dead ends: 174680 [2022-03-01 18:16:02,847 INFO L226 Difference]: Without dead ends: 173859 [2022-03-01 18:16:02,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:16:02,854 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 216 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:02,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 107 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:16:03,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173859 states. [2022-03-01 18:16:08,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173859 to 158612. [2022-03-01 18:16:09,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158612 states, 158611 states have (on average 3.7746562344351906) internal successors, (598702), 158611 states have internal predecessors, (598702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:10,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158612 states to 158612 states and 598702 transitions. [2022-03-01 18:16:10,856 INFO L78 Accepts]: Start accepts. Automaton has 158612 states and 598702 transitions. Word has length 33 [2022-03-01 18:16:10,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:10,856 INFO L470 AbstractCegarLoop]: Abstraction has 158612 states and 598702 transitions. [2022-03-01 18:16:10,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:10,856 INFO L276 IsEmpty]: Start isEmpty. Operand 158612 states and 598702 transitions. [2022-03-01 18:16:11,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:16:11,101 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:11,101 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:11,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-01 18:16:11,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:11,302 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:16:11,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:11,302 INFO L85 PathProgramCache]: Analyzing trace with hash -657949277, now seen corresponding path program 73 times [2022-03-01 18:16:11,302 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:11,302 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519201887] [2022-03-01 18:16:11,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:11,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:11,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:11,325 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-01 18:16:11,325 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:11,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519201887] [2022-03-01 18:16:11,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519201887] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:11,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534774347] [2022-03-01 18:16:11,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:16:11,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:11,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:11,344 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:16:11,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-01 18:16:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:11,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:16:11,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:11,591 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 18:16:11,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 18:16:11,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534774347] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:11,647 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:11,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-03-01 18:16:11,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80581620] [2022-03-01 18:16:11,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:11,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 18:16:11,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:11,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 18:16:11,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-01 18:16:11,648 INFO L87 Difference]: Start difference. First operand 158612 states and 598702 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:16,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:16,659 INFO L93 Difference]: Finished difference Result 248922 states and 921595 transitions. [2022-03-01 18:16:16,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 18:16:16,660 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-01 18:16:16,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:19,184 INFO L225 Difference]: With dead ends: 248922 [2022-03-01 18:16:19,184 INFO L226 Difference]: Without dead ends: 246356 [2022-03-01 18:16:19,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=517, Invalid=1205, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 18:16:19,185 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 300 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:19,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 112 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-01 18:16:19,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246356 states. [2022-03-01 18:16:23,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246356 to 122359. [2022-03-01 18:16:24,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122359 states, 122358 states have (on average 3.7970218539041176) internal successors, (464596), 122358 states have internal predecessors, (464596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:25,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122359 states to 122359 states and 464596 transitions. [2022-03-01 18:16:25,368 INFO L78 Accepts]: Start accepts. Automaton has 122359 states and 464596 transitions. Word has length 34 [2022-03-01 18:16:25,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:25,368 INFO L470 AbstractCegarLoop]: Abstraction has 122359 states and 464596 transitions. [2022-03-01 18:16:25,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:25,368 INFO L276 IsEmpty]: Start isEmpty. Operand 122359 states and 464596 transitions. [2022-03-01 18:16:25,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:16:25,607 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:25,607 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:25,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-01 18:16:25,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2022-03-01 18:16:25,823 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:16:25,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:25,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1223761653, now seen corresponding path program 74 times [2022-03-01 18:16:25,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:25,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030291263] [2022-03-01 18:16:25,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:25,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:16:25,859 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:25,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030291263] [2022-03-01 18:16:25,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030291263] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:25,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330960881] [2022-03-01 18:16:25,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:16:25,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:25,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:25,860 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:16:25,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-01 18:16:25,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:16:25,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:16:25,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:16:25,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:25,964 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:16:25,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:26,025 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:16:26,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330960881] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:26,025 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:26,025 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-03-01 18:16:26,025 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650758925] [2022-03-01 18:16:26,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:26,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-01 18:16:26,025 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:26,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-01 18:16:26,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-03-01 18:16:26,026 INFO L87 Difference]: Start difference. First operand 122359 states and 464596 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:27,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:27,395 INFO L93 Difference]: Finished difference Result 128866 states and 487336 transitions. [2022-03-01 18:16:27,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 18:16:27,395 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 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 35 [2022-03-01 18:16:27,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:28,386 INFO L225 Difference]: With dead ends: 128866 [2022-03-01 18:16:28,386 INFO L226 Difference]: Without dead ends: 128688 [2022-03-01 18:16:28,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-03-01 18:16:28,387 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 130 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:28,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 67 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:16:28,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128688 states. [2022-03-01 18:16:31,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128688 to 127321. [2022-03-01 18:16:31,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127321 states, 127320 states have (on average 3.7852419101476595) internal successors, (481937), 127320 states have internal predecessors, (481937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:33,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127321 states to 127321 states and 481937 transitions. [2022-03-01 18:16:33,353 INFO L78 Accepts]: Start accepts. Automaton has 127321 states and 481937 transitions. Word has length 35 [2022-03-01 18:16:33,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:33,353 INFO L470 AbstractCegarLoop]: Abstraction has 127321 states and 481937 transitions. [2022-03-01 18:16:33,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:33,353 INFO L276 IsEmpty]: Start isEmpty. Operand 127321 states and 481937 transitions. [2022-03-01 18:16:33,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:16:33,713 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:33,713 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:33,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-01 18:16:33,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:33,944 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:16:33,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:33,944 INFO L85 PathProgramCache]: Analyzing trace with hash -524603823, now seen corresponding path program 75 times [2022-03-01 18:16:33,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:33,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922650071] [2022-03-01 18:16:33,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:33,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:34,008 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:34,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922650071] [2022-03-01 18:16:34,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922650071] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:34,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465597089] [2022-03-01 18:16:34,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:16:34,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:34,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:34,010 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:16:34,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-01 18:16:34,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:16:34,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:16:34,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:16:34,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:34,167 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:16:34,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:34,257 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:16:34,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465597089] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:34,257 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:34,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 8 [2022-03-01 18:16:34,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274886100] [2022-03-01 18:16:34,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:34,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:16:34,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:34,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:16:34,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:16:34,258 INFO L87 Difference]: Start difference. First operand 127321 states and 481937 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:36,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:36,479 INFO L93 Difference]: Finished difference Result 151882 states and 564771 transitions. [2022-03-01 18:16:36,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 18:16:36,480 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:16:36,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:38,288 INFO L225 Difference]: With dead ends: 151882 [2022-03-01 18:16:38,289 INFO L226 Difference]: Without dead ends: 151789 [2022-03-01 18:16:38,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:16:38,289 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 93 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:38,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 85 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:16:38,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151789 states. [2022-03-01 18:16:42,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151789 to 141713. [2022-03-01 18:16:42,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141713 states, 141712 states have (on average 3.790561138082872) internal successors, (537168), 141712 states have internal predecessors, (537168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:43,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141713 states to 141713 states and 537168 transitions. [2022-03-01 18:16:43,724 INFO L78 Accepts]: Start accepts. Automaton has 141713 states and 537168 transitions. Word has length 35 [2022-03-01 18:16:43,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:43,725 INFO L470 AbstractCegarLoop]: Abstraction has 141713 states and 537168 transitions. [2022-03-01 18:16:43,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:43,725 INFO L276 IsEmpty]: Start isEmpty. Operand 141713 states and 537168 transitions. [2022-03-01 18:16:43,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:16:43,923 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:43,923 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:43,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-03-01 18:16:44,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:44,141 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:16:44,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:44,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1010926857, now seen corresponding path program 76 times [2022-03-01 18:16:44,141 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:44,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068914470] [2022-03-01 18:16:44,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:44,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:44,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:44,193 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:44,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068914470] [2022-03-01 18:16:44,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068914470] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:44,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644126026] [2022-03-01 18:16:44,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:16:44,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:44,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:44,195 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:16:44,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-01 18:16:44,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:16:44,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:16:44,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:16:44,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:16:44,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:44,398 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:16:44,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644126026] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:44,398 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:44,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-03-01 18:16:44,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177564434] [2022-03-01 18:16:44,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:44,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 18:16:44,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:44,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 18:16:44,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:16:44,399 INFO L87 Difference]: Start difference. First operand 141713 states and 537168 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:47,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:47,321 INFO L93 Difference]: Finished difference Result 162739 states and 597618 transitions. [2022-03-01 18:16:47,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 18:16:47,322 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:16:47,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:48,572 INFO L225 Difference]: With dead ends: 162739 [2022-03-01 18:16:48,572 INFO L226 Difference]: Without dead ends: 162639 [2022-03-01 18:16:48,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=581, Invalid=1675, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 18:16:48,573 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 299 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:48,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 229 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:16:49,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162639 states. [2022-03-01 18:16:53,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162639 to 141374. [2022-03-01 18:16:53,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141374 states, 141373 states have (on average 3.7643538723801573) internal successors, (532178), 141373 states have internal predecessors, (532178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:54,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141374 states to 141374 states and 532178 transitions. [2022-03-01 18:16:54,326 INFO L78 Accepts]: Start accepts. Automaton has 141374 states and 532178 transitions. Word has length 35 [2022-03-01 18:16:54,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:54,327 INFO L470 AbstractCegarLoop]: Abstraction has 141374 states and 532178 transitions. [2022-03-01 18:16:54,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:54,327 INFO L276 IsEmpty]: Start isEmpty. Operand 141374 states and 532178 transitions. [2022-03-01 18:16:54,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:16:54,572 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:54,572 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:54,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-01 18:16:54,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:54,792 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:16:54,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:54,792 INFO L85 PathProgramCache]: Analyzing trace with hash 47340655, now seen corresponding path program 77 times [2022-03-01 18:16:54,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:54,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337535410] [2022-03-01 18:16:54,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:54,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:54,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:55,252 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:55,253 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:55,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337535410] [2022-03-01 18:16:55,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337535410] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:55,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441859245] [2022-03-01 18:16:55,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:16:55,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:55,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:55,254 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:16:55,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-01 18:16:55,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 18:16:55,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:16:55,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-01 18:16:55,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:55,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:16:55,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:55,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2022-03-01 18:16:55,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 39 [2022-03-01 18:16:55,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-03-01 18:16:55,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-03-01 18:16:55,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-03-01 18:16:56,021 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:56,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:56,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:56,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:56,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:56,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42254 treesize of output 39694