/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-bad/dot-product-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-01 18:15:05,226 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-01 18:15:05,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-01 18:15:05,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-01 18:15:05,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-01 18:15:05,317 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-01 18:15:05,319 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-01 18:15:05,321 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-01 18:15:05,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-01 18:15:05,325 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-01 18:15:05,326 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-01 18:15:05,327 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-01 18:15:05,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-01 18:15:05,344 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-01 18:15:05,345 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-01 18:15:05,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-01 18:15:05,348 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-01 18:15:05,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-01 18:15:05,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-01 18:15:05,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-01 18:15:05,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-01 18:15:05,355 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-01 18:15:05,356 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-01 18:15:05,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-01 18:15:05,358 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-01 18:15:05,358 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-01 18:15:05,358 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-01 18:15:05,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-01 18:15:05,359 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-01 18:15:05,359 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-01 18:15:05,359 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-01 18:15:05,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-01 18:15:05,360 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-01 18:15:05,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-01 18:15:05,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-01 18:15:05,361 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-01 18:15:05,361 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-01 18:15:05,362 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-01 18:15:05,362 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-01 18:15:05,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-01 18:15:05,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-01 18:15:05,366 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 18:15:05,407 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-01 18:15:05,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-01 18:15:05,408 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-01 18:15:05,408 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-01 18:15:05,409 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-01 18:15:05,409 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-01 18:15:05,409 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-01 18:15:05,409 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-01 18:15:05,409 INFO L138 SettingsManager]: * Use SBE=true [2022-03-01 18:15:05,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-01 18:15:05,410 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-01 18:15:05,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-01 18:15:05,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-01 18:15:05,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-01 18:15:05,410 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-01 18:15:05,410 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-01 18:15:05,410 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-01 18:15:05,410 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-01 18:15:05,411 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-01 18:15:05,411 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-01 18:15:05,411 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-01 18:15:05,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-01 18:15:05,411 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-01 18:15:05,411 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-01 18:15:05,412 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-01 18:15:05,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:15:05,412 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-01 18:15:05,412 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-01 18:15:05,412 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-01 18:15:05,412 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-01 18:15:05,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-01 18:15:05,413 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-01 18:15:05,413 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-01 18:15:05,413 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-01 18:15:05,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-01 18:15:05,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-01 18:15:05,631 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-01 18:15:05,631 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-01 18:15:05,632 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-01 18:15:05,633 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/dot-product-alt.wvr.bpl [2022-03-01 18:15:05,634 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/dot-product-alt.wvr.bpl' [2022-03-01 18:15:05,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-01 18:15:05,671 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-01 18:15:05,672 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-01 18:15:05,673 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-01 18:15:05,673 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-01 18:15:05,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:15:05" (1/1) ... [2022-03-01 18:15:05,692 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:15:05" (1/1) ... [2022-03-01 18:15:05,697 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-01 18:15:05,699 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-01 18:15:05,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-01 18:15:05,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-01 18:15:05,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-01 18:15:05,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:15:05" (1/1) ... [2022-03-01 18:15:05,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:15:05" (1/1) ... [2022-03-01 18:15:05,711 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:15:05" (1/1) ... [2022-03-01 18:15:05,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:15:05" (1/1) ... [2022-03-01 18:15:05,715 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:15:05" (1/1) ... [2022-03-01 18:15:05,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:15:05" (1/1) ... [2022-03-01 18:15:05,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:15:05" (1/1) ... [2022-03-01 18:15:05,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-01 18:15:05,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-01 18:15:05,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-01 18:15:05,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-01 18:15:05,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:15:05" (1/1) ... [2022-03-01 18:15:05,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:15:05,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:05,770 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 18:15:05,782 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 18:15:05,801 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-01 18:15:05,802 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-01 18:15:05,802 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-01 18:15:05,802 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-01 18:15:05,802 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-01 18:15:05,802 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-01 18:15:05,802 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-01 18:15:05,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-01 18:15:05,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-01 18:15:05,802 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-01 18:15:05,802 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-01 18:15:05,803 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-01 18:15:05,803 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 18:15:05,843 INFO L234 CfgBuilder]: Building ICFG [2022-03-01 18:15:05,844 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-01 18:15:05,916 INFO L275 CfgBuilder]: Performing block encoding [2022-03-01 18:15:05,923 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-01 18:15:05,923 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-01 18:15:05,925 INFO L202 PluginConnector]: Adding new model dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:15:05 BoogieIcfgContainer [2022-03-01 18:15:05,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-01 18:15:05,927 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-01 18:15:05,927 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-01 18:15:05,930 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-01 18:15:05,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:15:05" (1/2) ... [2022-03-01 18:15:05,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36a6fbb5 and model type dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.03 06:15:05, skipping insertion in model container [2022-03-01 18:15:05,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:15:05" (2/2) ... [2022-03-01 18:15:05,932 INFO L111 eAbstractionObserver]: Analyzing ICFG dot-product-alt.wvr.bpl [2022-03-01 18:15:05,936 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-01 18:15:05,936 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-01 18:15:05,936 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-01 18:15:05,937 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-01 18:15:05,970 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-01 18:15:06,005 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-01 18:15:06,009 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 18:15:06,010 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-01 18:15:06,016 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2022-03-01 18:15:06,067 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states 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 18:15:06,070 INFO L276 IsEmpty]: Start isEmpty. Operand has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states 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 18:15:06,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 18:15:06,078 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:06,079 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 18:15:06,079 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:06,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:06,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1704584700, now seen corresponding path program 1 times [2022-03-01 18:15:06,091 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:06,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188704056] [2022-03-01 18:15:06,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:06,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:06,209 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 18:15:06,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:06,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188704056] [2022-03-01 18:15:06,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188704056] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:15:06,211 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:15:06,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 18:15:06,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076871941] [2022-03-01 18:15:06,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:15:06,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 18:15:06,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:06,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 18:15:06,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 18:15:06,241 INFO L87 Difference]: Start difference. First operand has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 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 6.0) 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 18:15:06,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:06,281 INFO L93 Difference]: Finished difference Result 298 states and 858 transitions. [2022-03-01 18:15:06,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 18:15:06,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) 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 18:15:06,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:06,296 INFO L225 Difference]: With dead ends: 298 [2022-03-01 18:15:06,296 INFO L226 Difference]: Without dead ends: 283 [2022-03-01 18:15:06,297 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 18:15:06,300 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 33 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 18:15:06,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 33 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:15:06,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-03-01 18:15:06,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2022-03-01 18:15:06,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.8820960698689957) internal successors, (660), 229 states have internal predecessors, (660), 0 states have call successors, (0), 0 states 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 18:15:06,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 660 transitions. [2022-03-01 18:15:06,432 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 660 transitions. Word has length 18 [2022-03-01 18:15:06,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:06,433 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 660 transitions. [2022-03-01 18:15:06,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) 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 18:15:06,433 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 660 transitions. [2022-03-01 18:15:06,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 18:15:06,436 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:06,436 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 18:15:06,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-01 18:15:06,437 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:06,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:06,437 INFO L85 PathProgramCache]: Analyzing trace with hash -665793199, now seen corresponding path program 1 times [2022-03-01 18:15:06,437 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:06,438 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792809942] [2022-03-01 18:15:06,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:06,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:06,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:06,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:15:06,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:06,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792809942] [2022-03-01 18:15:06,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792809942] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:15:06,500 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:15:06,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 18:15:06,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279585225] [2022-03-01 18:15:06,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:15:06,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 18:15:06,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:06,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 18:15:06,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 18:15:06,502 INFO L87 Difference]: Start difference. First operand 230 states and 660 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:06,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:06,580 INFO L93 Difference]: Finished difference Result 249 states and 716 transitions. [2022-03-01 18:15:06,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 18:15:06,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 18:15:06,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:06,583 INFO L225 Difference]: With dead ends: 249 [2022-03-01 18:15:06,583 INFO L226 Difference]: Without dead ends: 249 [2022-03-01 18:15:06,583 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 18:15:06,584 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:06,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 23 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:15:06,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-01 18:15:06,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 224. [2022-03-01 18:15:06,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.89237668161435) internal successors, (645), 223 states have internal predecessors, (645), 0 states have call successors, (0), 0 states 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 18:15:06,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 645 transitions. [2022-03-01 18:15:06,607 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 645 transitions. Word has length 21 [2022-03-01 18:15:06,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:06,607 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 645 transitions. [2022-03-01 18:15:06,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:06,608 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 645 transitions. [2022-03-01 18:15:06,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 18:15:06,609 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:06,609 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 18:15:06,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-01 18:15:06,610 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:06,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:06,610 INFO L85 PathProgramCache]: Analyzing trace with hash -970035705, now seen corresponding path program 1 times [2022-03-01 18:15:06,610 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:06,610 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853656342] [2022-03-01 18:15:06,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:06,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:06,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:15:06,676 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:06,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853656342] [2022-03-01 18:15:06,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853656342] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:15:06,676 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:15:06,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 18:15:06,677 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113750368] [2022-03-01 18:15:06,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:15:06,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 18:15:06,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:06,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 18:15:06,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:15:06,678 INFO L87 Difference]: Start difference. First operand 224 states and 645 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:06,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:06,732 INFO L93 Difference]: Finished difference Result 332 states and 966 transitions. [2022-03-01 18:15:06,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 18:15:06,733 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 18:15:06,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:06,735 INFO L225 Difference]: With dead ends: 332 [2022-03-01 18:15:06,735 INFO L226 Difference]: Without dead ends: 332 [2022-03-01 18:15:06,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:15:06,737 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:06,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 21 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:15:06,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-03-01 18:15:06,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 260. [2022-03-01 18:15:06,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.9034749034749034) internal successors, (752), 259 states have internal predecessors, (752), 0 states have call successors, (0), 0 states 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 18:15:06,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 752 transitions. [2022-03-01 18:15:06,760 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 752 transitions. Word has length 21 [2022-03-01 18:15:06,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:06,760 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 752 transitions. [2022-03-01 18:15:06,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:06,760 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 752 transitions. [2022-03-01 18:15:06,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:15:06,762 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:06,762 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, 1] [2022-03-01 18:15:06,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-01 18:15:06,763 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:06,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:06,763 INFO L85 PathProgramCache]: Analyzing trace with hash 954256018, now seen corresponding path program 1 times [2022-03-01 18:15:06,763 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:06,763 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423499879] [2022-03-01 18:15:06,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:06,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:07,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:07,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:07,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423499879] [2022-03-01 18:15:07,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423499879] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:07,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442102158] [2022-03-01 18:15:07,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:07,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:07,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:07,091 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 18:15:07,119 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 18:15:07,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:07,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 18:15:07,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:07,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:07,506 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 23 treesize of output 19 [2022-03-01 18:15:07,513 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 18:15:07,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-03-01 18:15:07,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:07,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:07,702 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:07,703 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 18:15:07,710 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:07,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 24 [2022-03-01 18:15:07,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:07,720 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 15 treesize of output 20 [2022-03-01 18:15:07,771 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 23 treesize of output 19 [2022-03-01 18:15:07,778 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-01 18:15:07,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-03-01 18:15:07,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:07,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442102158] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:07,871 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:07,872 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-01 18:15:07,873 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934127169] [2022-03-01 18:15:07,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:07,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:15:07,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:07,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:15:07,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:15:07,876 INFO L87 Difference]: Start difference. First operand 260 states and 752 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 18:15:08,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:08,292 INFO L93 Difference]: Finished difference Result 535 states and 1542 transitions. [2022-03-01 18:15:08,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 18:15:08,292 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 24 [2022-03-01 18:15:08,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:08,298 INFO L225 Difference]: With dead ends: 535 [2022-03-01 18:15:08,298 INFO L226 Difference]: Without dead ends: 520 [2022-03-01 18:15:08,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:15:08,299 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 234 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:08,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 112 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:15:08,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-03-01 18:15:08,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 346. [2022-03-01 18:15:08,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.8956521739130436) internal successors, (999), 345 states have internal predecessors, (999), 0 states have call successors, (0), 0 states 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 18:15:08,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 999 transitions. [2022-03-01 18:15:08,352 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 999 transitions. Word has length 24 [2022-03-01 18:15:08,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:08,352 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 999 transitions. [2022-03-01 18:15:08,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 18:15:08,352 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 999 transitions. [2022-03-01 18:15:08,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:15:08,354 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:08,354 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, 1] [2022-03-01 18:15:08,374 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 18:15:08,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:08,572 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:08,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:08,573 INFO L85 PathProgramCache]: Analyzing trace with hash 372317296, now seen corresponding path program 2 times [2022-03-01 18:15:08,573 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:08,573 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145529081] [2022-03-01 18:15:08,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:08,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:08,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:08,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:08,806 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:08,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145529081] [2022-03-01 18:15:08,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145529081] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:08,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124440588] [2022-03-01 18:15:08,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:15:08,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:08,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:08,808 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 18:15:08,838 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 18:15:08,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:15:08,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:08,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 18:15:08,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:09,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:09,115 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 81 [2022-03-01 18:15:09,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:09,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 61 [2022-03-01 18:15:09,141 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:09,141 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 16 treesize of output 21 [2022-03-01 18:15:09,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:09,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:09,353 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:09,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 18:15:09,360 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:09,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 24 [2022-03-01 18:15:09,365 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:09,366 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 15 treesize of output 20 [2022-03-01 18:15:09,397 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 23 treesize of output 19 [2022-03-01 18:15:09,402 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-01 18:15:09,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-03-01 18:15:09,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:09,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124440588] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:09,481 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:09,481 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-03-01 18:15:09,481 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278201421] [2022-03-01 18:15:09,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:09,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:15:09,481 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:09,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:15:09,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:15:09,482 INFO L87 Difference]: Start difference. First operand 346 states and 999 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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 18:15:11,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:11,037 INFO L93 Difference]: Finished difference Result 1195 states and 3469 transitions. [2022-03-01 18:15:11,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 18:15:11,038 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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 24 [2022-03-01 18:15:11,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:11,061 INFO L225 Difference]: With dead ends: 1195 [2022-03-01 18:15:11,061 INFO L226 Difference]: Without dead ends: 1165 [2022-03-01 18:15:11,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=572, Invalid=1978, Unknown=0, NotChecked=0, Total=2550 [2022-03-01 18:15:11,065 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 464 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:11,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 182 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:15:11,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2022-03-01 18:15:11,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 448. [2022-03-01 18:15:11,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 2.9731543624161074) internal successors, (1329), 447 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states 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 18:15:11,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1329 transitions. [2022-03-01 18:15:11,087 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1329 transitions. Word has length 24 [2022-03-01 18:15:11,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:11,087 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 1329 transitions. [2022-03-01 18:15:11,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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 18:15:11,087 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1329 transitions. [2022-03-01 18:15:11,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:15:11,088 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:11,088 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, 1] [2022-03-01 18:15:11,108 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 18:15:11,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:11,306 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:11,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:11,307 INFO L85 PathProgramCache]: Analyzing trace with hash -669864304, now seen corresponding path program 3 times [2022-03-01 18:15:11,307 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:11,307 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442870222] [2022-03-01 18:15:11,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:11,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:11,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:11,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:11,486 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:11,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442870222] [2022-03-01 18:15:11,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442870222] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:11,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121601208] [2022-03-01 18:15:11,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:15:11,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:11,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:11,487 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 18:15:11,488 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 18:15:11,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 18:15:11,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:11,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 18:15:11,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:11,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 [2022-03-01 18:15:11,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:11,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:11,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:11,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 18:15:11,750 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:11,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 24 [2022-03-01 18:15:11,758 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:11,758 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 15 treesize of output 20 [2022-03-01 18:15:11,804 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 23 treesize of output 19 [2022-03-01 18:15:11,809 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-01 18:15:11,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-03-01 18:15:11,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:11,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121601208] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:11,951 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:11,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-03-01 18:15:11,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36500252] [2022-03-01 18:15:11,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:11,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:15:11,952 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:11,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:15:11,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:15:11,953 INFO L87 Difference]: Start difference. First operand 448 states and 1329 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:12,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:12,331 INFO L93 Difference]: Finished difference Result 682 states and 1977 transitions. [2022-03-01 18:15:12,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 18:15:12,331 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:15:12,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:12,334 INFO L225 Difference]: With dead ends: 682 [2022-03-01 18:15:12,334 INFO L226 Difference]: Without dead ends: 667 [2022-03-01 18:15:12,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:15:12,338 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 122 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:12,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 119 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:15:12,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-03-01 18:15:12,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 464. [2022-03-01 18:15:12,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.9568034557235423) internal successors, (1369), 463 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states 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 18:15:12,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1369 transitions. [2022-03-01 18:15:12,351 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1369 transitions. Word has length 24 [2022-03-01 18:15:12,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:12,351 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 1369 transitions. [2022-03-01 18:15:12,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:12,351 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1369 transitions. [2022-03-01 18:15:12,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:15:12,352 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:12,352 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, 1] [2022-03-01 18:15:12,370 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 18:15:12,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:12,568 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:12,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:12,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1129139024, now seen corresponding path program 4 times [2022-03-01 18:15:12,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:12,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164440213] [2022-03-01 18:15:12,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:12,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:12,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:12,805 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:12,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164440213] [2022-03-01 18:15:12,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164440213] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:12,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321119556] [2022-03-01 18:15:12,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:15:12,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:12,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:12,828 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 18:15:12,829 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 18:15:12,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:15:12,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:12,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 18:15:12,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:13,001 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:13,001 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 23 treesize of output 27 [2022-03-01 18:15:13,008 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:13,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-03-01 18:15:13,016 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:13,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2022-03-01 18:15:13,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:13,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:13,233 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:13,233 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 18:15:13,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:13,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 24 [2022-03-01 18:15:13,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:13,247 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 15 treesize of output 20 [2022-03-01 18:15:13,284 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 23 treesize of output 19 [2022-03-01 18:15:13,318 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-01 18:15:13,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-03-01 18:15:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:13,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321119556] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:13,404 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:13,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-03-01 18:15:13,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424285836] [2022-03-01 18:15:13,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:13,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:15:13,405 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:13,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:15:13,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:15:13,406 INFO L87 Difference]: Start difference. First operand 464 states and 1369 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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 18:15:13,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:13,702 INFO L93 Difference]: Finished difference Result 763 states and 2257 transitions. [2022-03-01 18:15:13,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 18:15:13,703 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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 24 [2022-03-01 18:15:13,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:13,708 INFO L225 Difference]: With dead ends: 763 [2022-03-01 18:15:13,708 INFO L226 Difference]: Without dead ends: 748 [2022-03-01 18:15:13,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:15:13,709 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 172 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:13,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 122 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 250 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-03-01 18:15:13,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-03-01 18:15:13,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 479. [2022-03-01 18:15:13,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 2.98326359832636) internal successors, (1426), 478 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states 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 18:15:13,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1426 transitions. [2022-03-01 18:15:13,722 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1426 transitions. Word has length 24 [2022-03-01 18:15:13,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:13,722 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 1426 transitions. [2022-03-01 18:15:13,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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 18:15:13,722 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1426 transitions. [2022-03-01 18:15:13,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:15:13,724 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:13,724 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, 1] [2022-03-01 18:15:13,754 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 18:15:13,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:13,940 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:13,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:13,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1804153484, now seen corresponding path program 5 times [2022-03-01 18:15:13,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:13,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524545808] [2022-03-01 18:15:13,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:13,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:13,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:14,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:14,121 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:14,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524545808] [2022-03-01 18:15:14,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524545808] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:14,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821706910] [2022-03-01 18:15:14,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:15:14,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:14,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:14,122 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 18:15:14,123 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 18:15:14,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:15:14,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:14,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 18:15:14,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:14,289 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:14,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-03-01 18:15:14,296 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:14,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 27 [2022-03-01 18:15:14,303 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:14,303 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 18:15:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:14,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:14,653 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:14,653 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 18:15:14,658 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:14,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 24 [2022-03-01 18:15:14,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:14,664 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 15 treesize of output 20 [2022-03-01 18:15:14,713 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 23 treesize of output 19 [2022-03-01 18:15:14,719 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-01 18:15:14,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-03-01 18:15:14,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:14,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821706910] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:14,809 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:14,809 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 10] total 24 [2022-03-01 18:15:14,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882697536] [2022-03-01 18:15:14,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:14,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 18:15:14,809 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:14,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 18:15:14,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:15:14,810 INFO L87 Difference]: Start difference. First operand 479 states and 1426 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 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 18:15:18,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:18,711 INFO L93 Difference]: Finished difference Result 1711 states and 4956 transitions. [2022-03-01 18:15:18,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-01 18:15:18,712 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 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 24 [2022-03-01 18:15:18,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:18,718 INFO L225 Difference]: With dead ends: 1711 [2022-03-01 18:15:18,718 INFO L226 Difference]: Without dead ends: 1681 [2022-03-01 18:15:18,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5105 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2524, Invalid=11518, Unknown=0, NotChecked=0, Total=14042 [2022-03-01 18:15:18,721 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 374 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 1512 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:18,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 423 Invalid, 1942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1512 Invalid, 0 Unknown, 273 Unchecked, 0.7s Time] [2022-03-01 18:15:18,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1681 states. [2022-03-01 18:15:18,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1681 to 516. [2022-03-01 18:15:18,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 3.0349514563106794) internal successors, (1563), 515 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states 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 18:15:18,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1563 transitions. [2022-03-01 18:15:18,744 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1563 transitions. Word has length 24 [2022-03-01 18:15:18,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:18,744 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 1563 transitions. [2022-03-01 18:15:18,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 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 18:15:18,744 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1563 transitions. [2022-03-01 18:15:18,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:15:18,750 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:18,750 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, 1] [2022-03-01 18:15:18,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:18,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:18,966 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:18,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:18,966 INFO L85 PathProgramCache]: Analyzing trace with hash 795589012, now seen corresponding path program 6 times [2022-03-01 18:15:18,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:18,967 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475287922] [2022-03-01 18:15:18,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:18,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:19,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:19,154 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:19,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475287922] [2022-03-01 18:15:19,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475287922] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:19,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744338721] [2022-03-01 18:15:19,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:15:19,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:19,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:19,156 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 18:15:19,158 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 18:15:19,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 18:15:19,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:19,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 18:15:19,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:19,334 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:19,334 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 79 [2022-03-01 18:15:19,341 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:19,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 59 [2022-03-01 18:15:19,349 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:19,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2022-03-01 18:15:19,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:19,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:19,579 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:19,580 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 18:15:19,586 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:19,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 24 [2022-03-01 18:15:19,593 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:19,593 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 15 treesize of output 20 [2022-03-01 18:15:19,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 18:15:19,633 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-01 18:15:19,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-03-01 18:15:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:19,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744338721] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:19,725 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:19,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 18 [2022-03-01 18:15:19,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388518073] [2022-03-01 18:15:19,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:19,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 18:15:19,726 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:19,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 18:15:19,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-03-01 18:15:19,726 INFO L87 Difference]: Start difference. First operand 516 states and 1563 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:20,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:20,967 INFO L93 Difference]: Finished difference Result 1105 states and 3275 transitions. [2022-03-01 18:15:20,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 18:15:20,968 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:15:20,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:20,973 INFO L225 Difference]: With dead ends: 1105 [2022-03-01 18:15:20,973 INFO L226 Difference]: Without dead ends: 1090 [2022-03-01 18:15:20,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=472, Invalid=1420, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 18:15:20,974 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 267 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:20,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 173 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:15:20,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2022-03-01 18:15:20,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 498. [2022-03-01 18:15:20,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 3.006036217303823) internal successors, (1494), 497 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states 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 18:15:20,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1494 transitions. [2022-03-01 18:15:20,990 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1494 transitions. Word has length 24 [2022-03-01 18:15:20,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:20,990 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 1494 transitions. [2022-03-01 18:15:20,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:20,990 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1494 transitions. [2022-03-01 18:15:20,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:15:20,991 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:20,991 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, 1] [2022-03-01 18:15:21,014 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 18:15:21,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:21,207 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:21,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:21,208 INFO L85 PathProgramCache]: Analyzing trace with hash -2028428791, now seen corresponding path program 7 times [2022-03-01 18:15:21,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:21,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046743332] [2022-03-01 18:15:21,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:21,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:21,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:21,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:21,251 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:21,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046743332] [2022-03-01 18:15:21,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046743332] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:21,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926128609] [2022-03-01 18:15:21,252 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:15:21,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:21,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:21,253 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 18:15:21,254 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 18:15:21,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:21,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:15:21,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:21,372 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 18:15:21,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:21,441 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 18:15:21,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926128609] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:21,442 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:21,442 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 18:15:21,442 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075528814] [2022-03-01 18:15:21,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:21,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:15:21,442 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:21,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:15:21,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:15:21,443 INFO L87 Difference]: Start difference. First operand 498 states and 1494 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 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 18:15:22,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:22,220 INFO L93 Difference]: Finished difference Result 2271 states and 6608 transitions. [2022-03-01 18:15:22,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 18:15:22,220 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 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 27 [2022-03-01 18:15:22,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:22,231 INFO L225 Difference]: With dead ends: 2271 [2022-03-01 18:15:22,231 INFO L226 Difference]: Without dead ends: 2271 [2022-03-01 18:15:22,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 18:15:22,232 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 422 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:22,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 196 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:15:22,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2022-03-01 18:15:22,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 643. [2022-03-01 18:15:22,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 3.188473520249221) internal successors, (2047), 642 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states 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 18:15:22,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 2047 transitions. [2022-03-01 18:15:22,261 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 2047 transitions. Word has length 27 [2022-03-01 18:15:22,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:22,261 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 2047 transitions. [2022-03-01 18:15:22,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 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 18:15:22,261 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 2047 transitions. [2022-03-01 18:15:22,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:15:22,291 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:22,291 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, 1] [2022-03-01 18:15:22,317 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 18:15:22,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:22,507 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:22,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:22,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1539908103, now seen corresponding path program 8 times [2022-03-01 18:15:22,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:22,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824611042] [2022-03-01 18:15:22,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:22,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:22,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:22,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:22,559 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:22,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824611042] [2022-03-01 18:15:22,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824611042] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:22,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333194142] [2022-03-01 18:15:22,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:15:22,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:22,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:22,575 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 18:15:22,590 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 18:15:22,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:15:22,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:22,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:15:22,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:22,748 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 18:15:22,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:22,873 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 18:15:22,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333194142] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:22,873 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:22,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-01 18:15:22,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819187296] [2022-03-01 18:15:22,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:22,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:15:22,875 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:22,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:15:22,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:15:22,876 INFO L87 Difference]: Start difference. First operand 643 states and 2047 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:24,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:24,763 INFO L93 Difference]: Finished difference Result 3591 states and 10373 transitions. [2022-03-01 18:15:24,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-01 18:15:24,763 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:15:24,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:24,777 INFO L225 Difference]: With dead ends: 3591 [2022-03-01 18:15:24,777 INFO L226 Difference]: Without dead ends: 3591 [2022-03-01 18:15:24,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4292 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2378, Invalid=8752, Unknown=0, NotChecked=0, Total=11130 [2022-03-01 18:15:24,781 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 581 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:24,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [581 Valid, 338 Invalid, 1595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1483 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:15:24,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3591 states. [2022-03-01 18:15:24,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3591 to 647. [2022-03-01 18:15:24,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 3.1996904024767803) internal successors, (2067), 646 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states 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 18:15:24,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 2067 transitions. [2022-03-01 18:15:24,813 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 2067 transitions. Word has length 27 [2022-03-01 18:15:24,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:24,813 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 2067 transitions. [2022-03-01 18:15:24,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:24,813 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 2067 transitions. [2022-03-01 18:15:24,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:15:24,814 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:24,814 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, 1] [2022-03-01 18:15:24,831 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 18:15:25,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-01 18:15:25,032 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:25,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:25,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1733808771, now seen corresponding path program 9 times [2022-03-01 18:15:25,051 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:25,051 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514999341] [2022-03-01 18:15:25,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:25,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:25,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:25,106 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:25,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514999341] [2022-03-01 18:15:25,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514999341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:25,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185105384] [2022-03-01 18:15:25,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:15:25,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:25,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:25,108 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 18:15:25,109 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 18:15:25,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:15:25,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:25,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:15:25,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:25,253 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 18:15:25,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:25,380 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 18:15:25,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185105384] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:25,381 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:25,381 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-01 18:15:25,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236950701] [2022-03-01 18:15:25,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:25,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:15:25,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:25,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:15:25,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:15:25,382 INFO L87 Difference]: Start difference. First operand 647 states and 2067 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:26,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:26,306 INFO L93 Difference]: Finished difference Result 2922 states and 8417 transitions. [2022-03-01 18:15:26,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-01 18:15:26,306 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:15:26,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:26,339 INFO L225 Difference]: With dead ends: 2922 [2022-03-01 18:15:26,339 INFO L226 Difference]: Without dead ends: 2922 [2022-03-01 18:15:26,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1525 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1095, Invalid=3327, Unknown=0, NotChecked=0, Total=4422 [2022-03-01 18:15:26,340 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 471 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:26,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 248 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:15:26,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2922 states. [2022-03-01 18:15:26,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2922 to 637. [2022-03-01 18:15:26,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.1871069182389937) internal successors, (2027), 636 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states 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 18:15:26,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 2027 transitions. [2022-03-01 18:15:26,379 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 2027 transitions. Word has length 27 [2022-03-01 18:15:26,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:26,380 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 2027 transitions. [2022-03-01 18:15:26,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:26,380 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 2027 transitions. [2022-03-01 18:15:26,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:15:26,381 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:26,381 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, 1, 1, 1, 1] [2022-03-01 18:15:26,399 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 18:15:26,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:26,582 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:26,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:26,582 INFO L85 PathProgramCache]: Analyzing trace with hash 373023270, now seen corresponding path program 1 times [2022-03-01 18:15:26,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:26,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178847077] [2022-03-01 18:15:26,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:26,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:26,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:15:26,616 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:26,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178847077] [2022-03-01 18:15:26,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178847077] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:26,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293859793] [2022-03-01 18:15:26,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:26,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:26,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:26,618 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 18:15:26,660 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 18:15:26,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:26,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:15:26,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:26,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:15:26,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:26,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:15:26,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293859793] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:26,822 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:26,822 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-01 18:15:26,822 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369656207] [2022-03-01 18:15:26,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:26,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 18:15:26,823 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:26,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 18:15:26,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:15:26,823 INFO L87 Difference]: Start difference. First operand 637 states and 2027 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 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 18:15:26,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:26,962 INFO L93 Difference]: Finished difference Result 1395 states and 4216 transitions. [2022-03-01 18:15:26,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 18:15:26,962 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 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 27 [2022-03-01 18:15:26,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:26,966 INFO L225 Difference]: With dead ends: 1395 [2022-03-01 18:15:26,966 INFO L226 Difference]: Without dead ends: 1377 [2022-03-01 18:15:26,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:15:26,966 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 305 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:26,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 57 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:15:26,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2022-03-01 18:15:26,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 917. [2022-03-01 18:15:26,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 3.2587336244541483) internal successors, (2985), 916 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states 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 18:15:26,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 2985 transitions. [2022-03-01 18:15:26,984 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 2985 transitions. Word has length 27 [2022-03-01 18:15:26,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:26,984 INFO L470 AbstractCegarLoop]: Abstraction has 917 states and 2985 transitions. [2022-03-01 18:15:26,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 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 18:15:26,984 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 2985 transitions. [2022-03-01 18:15:26,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:15:26,986 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:26,986 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, 1] [2022-03-01 18:15:27,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:27,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-01 18:15:27,212 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:27,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:27,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1292974513, now seen corresponding path program 10 times [2022-03-01 18:15:27,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:27,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581634567] [2022-03-01 18:15:27,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:27,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:27,246 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 18:15:27,246 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:27,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581634567] [2022-03-01 18:15:27,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581634567] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:27,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418267907] [2022-03-01 18:15:27,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:15:27,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:27,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:27,248 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 18:15:27,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:15:27,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:27,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:15:27,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:27,290 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 18:15:27,357 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 18:15:27,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:27,397 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 18:15:27,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418267907] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:27,397 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:27,397 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-01 18:15:27,397 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069702766] [2022-03-01 18:15:27,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:27,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:15:27,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:27,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:15:27,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:15:27,398 INFO L87 Difference]: Start difference. First operand 917 states and 2985 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:27,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:27,695 INFO L93 Difference]: Finished difference Result 2362 states and 7302 transitions. [2022-03-01 18:15:27,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 18:15:27,695 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:15:27,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:27,700 INFO L225 Difference]: With dead ends: 2362 [2022-03-01 18:15:27,700 INFO L226 Difference]: Without dead ends: 2295 [2022-03-01 18:15:27,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:15:27,701 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 296 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:27,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 199 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:15:27,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2022-03-01 18:15:27,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 1429. [2022-03-01 18:15:27,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.330532212885154) internal successors, (4756), 1428 states have internal predecessors, (4756), 0 states have call successors, (0), 0 states 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 18:15:27,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 4756 transitions. [2022-03-01 18:15:27,727 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 4756 transitions. Word has length 27 [2022-03-01 18:15:27,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:27,727 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 4756 transitions. [2022-03-01 18:15:27,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:27,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 4756 transitions. [2022-03-01 18:15:27,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:15:27,730 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:27,730 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, 1, 1, 1, 1] [2022-03-01 18:15:27,760 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 18:15:27,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-01 18:15:27,950 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:27,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:27,950 INFO L85 PathProgramCache]: Analyzing trace with hash -502740502, now seen corresponding path program 2 times [2022-03-01 18:15:27,950 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:27,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492032564] [2022-03-01 18:15:27,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:27,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:27,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:27,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:15:27,989 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:27,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492032564] [2022-03-01 18:15:27,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492032564] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:27,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697298353] [2022-03-01 18:15:27,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:15:27,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:27,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:28,004 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 18:15:28,005 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 18:15:28,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:15:28,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:28,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:15:28,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:15:28,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:15:28,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697298353] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:28,181 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:28,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-01 18:15:28,181 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17855689] [2022-03-01 18:15:28,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:28,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 18:15:28,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:28,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 18:15:28,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:15:28,182 INFO L87 Difference]: Start difference. First operand 1429 states and 4756 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 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 18:15:28,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:28,377 INFO L93 Difference]: Finished difference Result 2511 states and 7693 transitions. [2022-03-01 18:15:28,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 18:15:28,377 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 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 27 [2022-03-01 18:15:28,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:28,382 INFO L225 Difference]: With dead ends: 2511 [2022-03-01 18:15:28,383 INFO L226 Difference]: Without dead ends: 2511 [2022-03-01 18:15:28,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:15:28,385 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 270 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:28,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 90 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:15:28,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2022-03-01 18:15:28,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 1499. [2022-03-01 18:15:28,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 3.2963951935914553) internal successors, (4938), 1498 states have internal predecessors, (4938), 0 states have call successors, (0), 0 states 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 18:15:28,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 4938 transitions. [2022-03-01 18:15:28,420 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 4938 transitions. Word has length 27 [2022-03-01 18:15:28,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:28,421 INFO L470 AbstractCegarLoop]: Abstraction has 1499 states and 4938 transitions. [2022-03-01 18:15:28,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 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 18:15:28,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 4938 transitions. [2022-03-01 18:15:28,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:15:28,424 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:28,424 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, 1] [2022-03-01 18:15:28,442 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 18:15:28,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-01 18:15:28,643 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:28,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:28,643 INFO L85 PathProgramCache]: Analyzing trace with hash -340431285, now seen corresponding path program 11 times [2022-03-01 18:15:28,643 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:28,643 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937279467] [2022-03-01 18:15:28,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:28,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:28,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:28,682 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:28,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937279467] [2022-03-01 18:15:28,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937279467] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:28,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475192018] [2022-03-01 18:15:28,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:15:28,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:28,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:28,683 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 18:15:28,684 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 18:15:28,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:15:28,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:28,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:15:28,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:28,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:28,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:28,837 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 18:15:28,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475192018] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:28,837 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:28,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:15:28,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984339508] [2022-03-01 18:15:28,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:28,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:15:28,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:28,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:15:28,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:15:28,838 INFO L87 Difference]: Start difference. First operand 1499 states and 4938 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 18:15:29,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:29,364 INFO L93 Difference]: Finished difference Result 4914 states and 14852 transitions. [2022-03-01 18:15:29,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 18:15:29,365 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 27 [2022-03-01 18:15:29,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:29,376 INFO L225 Difference]: With dead ends: 4914 [2022-03-01 18:15:29,376 INFO L226 Difference]: Without dead ends: 4914 [2022-03-01 18:15:29,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 18:15:29,378 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 293 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:29,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 172 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:15:29,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4914 states. [2022-03-01 18:15:29,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4914 to 1527. [2022-03-01 18:15:29,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 3.290956749672346) internal successors, (5022), 1526 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states 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 18:15:29,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 5022 transitions. [2022-03-01 18:15:29,431 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 5022 transitions. Word has length 27 [2022-03-01 18:15:29,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:29,432 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 5022 transitions. [2022-03-01 18:15:29,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 18:15:29,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 5022 transitions. [2022-03-01 18:15:29,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:15:29,434 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:29,434 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, 1] [2022-03-01 18:15:29,468 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 18:15:29,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-01 18:15:29,669 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:29,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:29,669 INFO L85 PathProgramCache]: Analyzing trace with hash -428155657, now seen corresponding path program 12 times [2022-03-01 18:15:29,669 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:29,669 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870527246] [2022-03-01 18:15:29,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:29,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:29,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:29,720 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:29,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870527246] [2022-03-01 18:15:29,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870527246] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:29,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187236866] [2022-03-01 18:15:29,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:15:29,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:29,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:29,722 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 18:15:29,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-01 18:15:29,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 18:15:29,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:29,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:15:29,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:29,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:29,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:29,911 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 18:15:29,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187236866] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:29,912 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:29,912 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:15:29,912 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220901409] [2022-03-01 18:15:29,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:29,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:15:29,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:29,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:15:29,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:15:29,913 INFO L87 Difference]: Start difference. First operand 1527 states and 5022 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 18:15:30,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:30,669 INFO L93 Difference]: Finished difference Result 4943 states and 15025 transitions. [2022-03-01 18:15:30,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-01 18:15:30,670 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 27 [2022-03-01 18:15:30,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:30,679 INFO L225 Difference]: With dead ends: 4943 [2022-03-01 18:15:30,679 INFO L226 Difference]: Without dead ends: 4943 [2022-03-01 18:15:30,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 18:15:30,681 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 327 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:30,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 180 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:15:30,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4943 states. [2022-03-01 18:15:30,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4943 to 1683. [2022-03-01 18:15:30,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.256837098692033) internal successors, (5478), 1682 states have internal predecessors, (5478), 0 states have call successors, (0), 0 states 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 18:15:30,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5478 transitions. [2022-03-01 18:15:30,730 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5478 transitions. Word has length 27 [2022-03-01 18:15:30,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:30,731 INFO L470 AbstractCegarLoop]: Abstraction has 1683 states and 5478 transitions. [2022-03-01 18:15:30,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 18:15:30,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5478 transitions. [2022-03-01 18:15:30,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:15:30,734 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:30,734 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, 1] [2022-03-01 18:15:30,760 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 18:15:30,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:30,951 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:30,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:30,951 INFO L85 PathProgramCache]: Analyzing trace with hash 193811757, now seen corresponding path program 13 times [2022-03-01 18:15:30,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:30,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735540648] [2022-03-01 18:15:30,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:30,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:30,987 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 18:15:30,988 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:30,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735540648] [2022-03-01 18:15:30,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735540648] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:30,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193093242] [2022-03-01 18:15:30,988 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:15:30,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:30,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:31,004 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 18:15:31,019 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 18:15:31,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:31,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:15:31,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:31,141 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 18:15:31,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:31,187 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 18:15:31,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193093242] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:31,188 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:31,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-03-01 18:15:31,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053664324] [2022-03-01 18:15:31,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:31,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 18:15:31,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:31,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 18:15:31,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:15:31,189 INFO L87 Difference]: Start difference. First operand 1683 states and 5478 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:31,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:31,479 INFO L93 Difference]: Finished difference Result 3283 states and 10240 transitions. [2022-03-01 18:15:31,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 18:15:31,479 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:15:31,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:31,485 INFO L225 Difference]: With dead ends: 3283 [2022-03-01 18:15:31,485 INFO L226 Difference]: Without dead ends: 3283 [2022-03-01 18:15:31,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:15:31,486 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 268 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:31,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 208 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:15:31,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2022-03-01 18:15:31,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 2080. [2022-03-01 18:15:31,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 2079 states have (on average 3.3044733044733046) internal successors, (6870), 2079 states have internal predecessors, (6870), 0 states have call successors, (0), 0 states 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 18:15:31,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 6870 transitions. [2022-03-01 18:15:31,523 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 6870 transitions. Word has length 27 [2022-03-01 18:15:31,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:31,523 INFO L470 AbstractCegarLoop]: Abstraction has 2080 states and 6870 transitions. [2022-03-01 18:15:31,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:31,524 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 6870 transitions. [2022-03-01 18:15:31,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:15:31,527 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:31,527 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, 1] [2022-03-01 18:15:31,543 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 18:15:31,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-01 18:15:31,743 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:31,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:31,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1978086597, now seen corresponding path program 14 times [2022-03-01 18:15:31,743 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:31,743 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174519573] [2022-03-01 18:15:31,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:31,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:31,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:31,783 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 18:15:31,783 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:31,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174519573] [2022-03-01 18:15:31,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174519573] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:31,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085777822] [2022-03-01 18:15:31,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:15:31,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:31,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:31,791 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 18:15:31,791 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 18:15:31,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:15:31,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:31,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:15:31,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:31,870 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 18:15:31,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:31,938 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 18:15:31,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085777822] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:31,938 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:31,938 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:15:31,938 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162840475] [2022-03-01 18:15:31,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:31,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:15:31,939 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:31,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:15:31,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:15:31,939 INFO L87 Difference]: Start difference. First operand 2080 states and 6870 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 18:15:32,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:32,445 INFO L93 Difference]: Finished difference Result 5570 states and 17389 transitions. [2022-03-01 18:15:32,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 18:15:32,447 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 27 [2022-03-01 18:15:32,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:32,457 INFO L225 Difference]: With dead ends: 5570 [2022-03-01 18:15:32,457 INFO L226 Difference]: Without dead ends: 5566 [2022-03-01 18:15:32,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 18:15:32,458 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 380 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:32,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 154 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:15:32,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5566 states. [2022-03-01 18:15:32,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5566 to 2092. [2022-03-01 18:15:32,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2091 states have (on average 3.29507412721186) internal successors, (6890), 2091 states have internal predecessors, (6890), 0 states have call successors, (0), 0 states 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 18:15:32,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 6890 transitions. [2022-03-01 18:15:32,521 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 6890 transitions. Word has length 27 [2022-03-01 18:15:32,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:32,521 INFO L470 AbstractCegarLoop]: Abstraction has 2092 states and 6890 transitions. [2022-03-01 18:15:32,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 18:15:32,521 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 6890 transitions. [2022-03-01 18:15:32,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:15:32,525 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:32,525 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, 1] [2022-03-01 18:15:32,542 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 18:15:32,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:32,739 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:32,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:32,740 INFO L85 PathProgramCache]: Analyzing trace with hash 721611839, now seen corresponding path program 15 times [2022-03-01 18:15:32,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:32,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129125245] [2022-03-01 18:15:32,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:32,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:32,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:32,804 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:32,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129125245] [2022-03-01 18:15:32,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129125245] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:32,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83846715] [2022-03-01 18:15:32,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:15:32,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:32,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:32,806 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 18:15:32,807 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 18:15:32,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:15:32,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:32,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:15:32,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:32,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:33,017 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 18:15:33,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83846715] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:33,017 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:33,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-01 18:15:33,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180450837] [2022-03-01 18:15:33,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:33,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:15:33,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:33,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:15:33,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:15:33,021 INFO L87 Difference]: Start difference. First operand 2092 states and 6890 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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 18:15:33,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:33,886 INFO L93 Difference]: Finished difference Result 6718 states and 20043 transitions. [2022-03-01 18:15:33,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-01 18:15:33,886 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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 27 [2022-03-01 18:15:33,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:33,917 INFO L225 Difference]: With dead ends: 6718 [2022-03-01 18:15:33,917 INFO L226 Difference]: Without dead ends: 6718 [2022-03-01 18:15:33,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2022-03-01 18:15:33,919 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 463 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:33,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 284 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:15:33,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6718 states. [2022-03-01 18:15:33,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6718 to 2263. [2022-03-01 18:15:33,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 3.3320070733863836) internal successors, (7537), 2262 states have internal predecessors, (7537), 0 states have call successors, (0), 0 states 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 18:15:33,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 7537 transitions. [2022-03-01 18:15:33,985 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 7537 transitions. Word has length 27 [2022-03-01 18:15:33,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:33,985 INFO L470 AbstractCegarLoop]: Abstraction has 2263 states and 7537 transitions. [2022-03-01 18:15:33,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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 18:15:33,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 7537 transitions. [2022-03-01 18:15:33,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:15:33,989 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:33,989 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, 1] [2022-03-01 18:15:34,005 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 18:15:34,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:34,205 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:34,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:34,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1790705987, now seen corresponding path program 16 times [2022-03-01 18:15:34,206 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:34,206 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132354225] [2022-03-01 18:15:34,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:34,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:34,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:34,239 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 18:15:34,239 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:34,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132354225] [2022-03-01 18:15:34,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132354225] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:34,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522562459] [2022-03-01 18:15:34,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:15:34,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:34,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:34,241 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 18:15:34,242 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 18:15:34,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:15:34,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:34,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:15:34,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:34,355 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 18:15:34,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:34,445 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 18:15:34,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522562459] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:34,445 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:34,445 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-01 18:15:34,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12380403] [2022-03-01 18:15:34,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:34,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:15:34,446 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:34,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:15:34,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:15:34,446 INFO L87 Difference]: Start difference. First operand 2263 states and 7537 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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 18:15:35,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:35,737 INFO L93 Difference]: Finished difference Result 6558 states and 19960 transitions. [2022-03-01 18:15:35,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-01 18:15:35,737 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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 27 [2022-03-01 18:15:35,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:35,749 INFO L225 Difference]: With dead ends: 6558 [2022-03-01 18:15:35,749 INFO L226 Difference]: Without dead ends: 6554 [2022-03-01 18:15:35,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2489 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2022-03-01 18:15:35,751 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 545 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:35,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 258 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:15:35,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6554 states. [2022-03-01 18:15:35,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6554 to 2263. [2022-03-01 18:15:35,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 3.3311229000884173) internal successors, (7535), 2262 states have internal predecessors, (7535), 0 states have call successors, (0), 0 states 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 18:15:35,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 7535 transitions. [2022-03-01 18:15:35,818 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 7535 transitions. Word has length 27 [2022-03-01 18:15:35,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:35,818 INFO L470 AbstractCegarLoop]: Abstraction has 2263 states and 7535 transitions. [2022-03-01 18:15:35,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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 18:15:35,822 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 7535 transitions. [2022-03-01 18:15:35,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:15:35,827 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:35,827 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, 1, 1, 1, 1] [2022-03-01 18:15:35,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-01 18:15:36,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:36,045 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:36,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:36,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1441844744, now seen corresponding path program 3 times [2022-03-01 18:15:36,045 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:36,045 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212801094] [2022-03-01 18:15:36,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:36,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:15:36,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:36,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212801094] [2022-03-01 18:15:36,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212801094] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:36,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220632980] [2022-03-01 18:15:36,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:15:36,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:36,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:36,089 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 18:15:36,105 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 18:15:36,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 18:15:36,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:36,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:15:36,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:15:36,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:15:36,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220632980] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:36,204 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:36,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-03-01 18:15:36,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608062295] [2022-03-01 18:15:36,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:36,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:15:36,204 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:36,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:15:36,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:15:36,205 INFO L87 Difference]: Start difference. First operand 2263 states and 7535 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) 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 18:15:36,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:36,292 INFO L93 Difference]: Finished difference Result 2910 states and 9299 transitions. [2022-03-01 18:15:36,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 18:15:36,293 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) 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 27 [2022-03-01 18:15:36,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:36,297 INFO L225 Difference]: With dead ends: 2910 [2022-03-01 18:15:36,297 INFO L226 Difference]: Without dead ends: 2910 [2022-03-01 18:15:36,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:15:36,298 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 124 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:36,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 92 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:15:36,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2022-03-01 18:15:36,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2121. [2022-03-01 18:15:36,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 2120 states have (on average 3.3141509433962266) internal successors, (7026), 2120 states have internal predecessors, (7026), 0 states have call successors, (0), 0 states 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 18:15:36,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 7026 transitions. [2022-03-01 18:15:36,328 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 7026 transitions. Word has length 27 [2022-03-01 18:15:36,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:36,329 INFO L470 AbstractCegarLoop]: Abstraction has 2121 states and 7026 transitions. [2022-03-01 18:15:36,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) 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 18:15:36,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 7026 transitions. [2022-03-01 18:15:36,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:15:36,332 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:36,332 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, 1] [2022-03-01 18:15:36,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:36,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:36,548 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:36,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:36,548 INFO L85 PathProgramCache]: Analyzing trace with hash -746228089, now seen corresponding path program 17 times [2022-03-01 18:15:36,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:36,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592482189] [2022-03-01 18:15:36,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:36,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:36,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:36,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:36,581 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:36,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592482189] [2022-03-01 18:15:36,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592482189] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:36,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131501497] [2022-03-01 18:15:36,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:15:36,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:36,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:36,582 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 18:15:36,599 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 18:15:36,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:15:36,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:36,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:15:36,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:36,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:36,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:36,695 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 18:15:36,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131501497] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:36,695 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:36,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-01 18:15:36,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751990833] [2022-03-01 18:15:36,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:36,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 18:15:36,695 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:36,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 18:15:36,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:15:36,696 INFO L87 Difference]: Start difference. First operand 2121 states and 7026 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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 18:15:36,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:36,977 INFO L93 Difference]: Finished difference Result 4738 states and 14874 transitions. [2022-03-01 18:15:36,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 18:15:36,978 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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 27 [2022-03-01 18:15:36,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:37,010 INFO L225 Difference]: With dead ends: 4738 [2022-03-01 18:15:37,011 INFO L226 Difference]: Without dead ends: 4738 [2022-03-01 18:15:37,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:15:37,012 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 201 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:37,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 142 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:15:37,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4738 states. [2022-03-01 18:15:37,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4738 to 2263. [2022-03-01 18:15:37,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 3.2904509283819627) internal successors, (7443), 2262 states have internal predecessors, (7443), 0 states have call successors, (0), 0 states 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 18:15:37,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 7443 transitions. [2022-03-01 18:15:37,111 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 7443 transitions. Word has length 27 [2022-03-01 18:15:37,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:37,111 INFO L470 AbstractCegarLoop]: Abstraction has 2263 states and 7443 transitions. [2022-03-01 18:15:37,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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 18:15:37,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 7443 transitions. [2022-03-01 18:15:37,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:15:37,132 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:37,132 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, 1] [2022-03-01 18:15:37,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:37,333 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,SelfDestructingSolverStorable22 [2022-03-01 18:15:37,333 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:37,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:37,334 INFO L85 PathProgramCache]: Analyzing trace with hash -93700181, now seen corresponding path program 18 times [2022-03-01 18:15:37,334 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:37,334 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276264462] [2022-03-01 18:15:37,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:37,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:37,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:37,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:37,367 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:37,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276264462] [2022-03-01 18:15:37,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276264462] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:37,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119540092] [2022-03-01 18:15:37,367 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:15:37,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:37,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:37,369 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 18:15:37,369 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 18:15:37,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 18:15:37,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:37,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:15:37,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:37,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:37,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:37,522 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 18:15:37,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119540092] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:37,522 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:37,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 18:15:37,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471881273] [2022-03-01 18:15:37,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:37,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 18:15:37,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:37,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 18:15:37,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:15:37,523 INFO L87 Difference]: Start difference. First operand 2263 states and 7443 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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 18:15:37,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:37,806 INFO L93 Difference]: Finished difference Result 5029 states and 15712 transitions. [2022-03-01 18:15:37,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 18:15:37,806 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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 27 [2022-03-01 18:15:37,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:37,814 INFO L225 Difference]: With dead ends: 5029 [2022-03-01 18:15:37,814 INFO L226 Difference]: Without dead ends: 5029 [2022-03-01 18:15:37,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:15:37,815 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 227 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:37,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 128 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:15:37,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5029 states. [2022-03-01 18:15:37,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5029 to 2429. [2022-03-01 18:15:37,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2429 states, 2428 states have (on average 3.2701812191103787) internal successors, (7940), 2428 states have internal predecessors, (7940), 0 states have call successors, (0), 0 states 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 18:15:37,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2429 states to 2429 states and 7940 transitions. [2022-03-01 18:15:37,864 INFO L78 Accepts]: Start accepts. Automaton has 2429 states and 7940 transitions. Word has length 27 [2022-03-01 18:15:37,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:37,864 INFO L470 AbstractCegarLoop]: Abstraction has 2429 states and 7940 transitions. [2022-03-01 18:15:37,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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 18:15:37,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2429 states and 7940 transitions. [2022-03-01 18:15:37,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:15:37,868 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:37,868 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, 1] [2022-03-01 18:15:37,884 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 18:15:38,083 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,SelfDestructingSolverStorable23 [2022-03-01 18:15:38,084 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:38,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:38,084 INFO L85 PathProgramCache]: Analyzing trace with hash -421030457, now seen corresponding path program 19 times [2022-03-01 18:15:38,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:38,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763606090] [2022-03-01 18:15:38,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:38,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:38,134 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 18:15:38,135 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:38,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763606090] [2022-03-01 18:15:38,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763606090] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:38,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731133922] [2022-03-01 18:15:38,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:15:38,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:38,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:38,136 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 18:15:38,137 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 18:15:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:38,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:15:38,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:38,241 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 18:15:38,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:38,284 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 18:15:38,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731133922] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:38,284 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:38,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-03-01 18:15:38,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064284398] [2022-03-01 18:15:38,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:38,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:15:38,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:38,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:15:38,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:15:38,285 INFO L87 Difference]: Start difference. First operand 2429 states and 7940 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 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 18:15:38,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:38,471 INFO L93 Difference]: Finished difference Result 3230 states and 10321 transitions. [2022-03-01 18:15:38,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 18:15:38,471 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 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 27 [2022-03-01 18:15:38,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:38,477 INFO L225 Difference]: With dead ends: 3230 [2022-03-01 18:15:38,477 INFO L226 Difference]: Without dead ends: 3220 [2022-03-01 18:15:38,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:15:38,477 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 219 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:38,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 184 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:15:38,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2022-03-01 18:15:38,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 2644. [2022-03-01 18:15:38,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2644 states, 2643 states have (on average 3.3019296254256525) internal successors, (8727), 2643 states have internal predecessors, (8727), 0 states have call successors, (0), 0 states 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 18:15:38,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2644 states to 2644 states and 8727 transitions. [2022-03-01 18:15:38,522 INFO L78 Accepts]: Start accepts. Automaton has 2644 states and 8727 transitions. Word has length 27 [2022-03-01 18:15:38,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:38,522 INFO L470 AbstractCegarLoop]: Abstraction has 2644 states and 8727 transitions. [2022-03-01 18:15:38,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 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 18:15:38,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2644 states and 8727 transitions. [2022-03-01 18:15:38,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:15:38,526 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:38,526 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, 1] [2022-03-01 18:15:38,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:38,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:38,739 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:38,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:38,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1643631121, now seen corresponding path program 20 times [2022-03-01 18:15:38,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:38,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335664950] [2022-03-01 18:15:38,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:38,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:38,770 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 18:15:38,771 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:38,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335664950] [2022-03-01 18:15:38,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335664950] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:38,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942947107] [2022-03-01 18:15:38,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:15:38,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:38,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:38,772 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 18:15:38,777 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 18:15:38,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:15:38,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:38,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:15:38,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:38,877 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 18:15:38,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:38,935 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 18:15:38,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942947107] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:38,935 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:38,935 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 18:15:38,935 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737693395] [2022-03-01 18:15:38,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:38,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 18:15:38,936 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:38,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 18:15:38,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:15:38,936 INFO L87 Difference]: Start difference. First operand 2644 states and 8727 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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 18:15:39,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:39,243 INFO L93 Difference]: Finished difference Result 5352 states and 17038 transitions. [2022-03-01 18:15:39,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 18:15:39,243 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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 27 [2022-03-01 18:15:39,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:39,252 INFO L225 Difference]: With dead ends: 5352 [2022-03-01 18:15:39,252 INFO L226 Difference]: Without dead ends: 5348 [2022-03-01 18:15:39,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:15:39,253 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 248 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:39,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 103 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:15:39,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5348 states. [2022-03-01 18:15:39,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5348 to 2644. [2022-03-01 18:15:39,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2644 states, 2643 states have (on average 3.2996594778660615) internal successors, (8721), 2643 states have internal predecessors, (8721), 0 states have call successors, (0), 0 states 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 18:15:39,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2644 states to 2644 states and 8721 transitions. [2022-03-01 18:15:39,305 INFO L78 Accepts]: Start accepts. Automaton has 2644 states and 8721 transitions. Word has length 27 [2022-03-01 18:15:39,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:39,305 INFO L470 AbstractCegarLoop]: Abstraction has 2644 states and 8721 transitions. [2022-03-01 18:15:39,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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 18:15:39,305 INFO L276 IsEmpty]: Start isEmpty. Operand 2644 states and 8721 transitions. [2022-03-01 18:15:39,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:15:39,309 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:39,309 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, 1] [2022-03-01 18:15:39,345 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 18:15:39,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:39,522 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:39,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:39,522 INFO L85 PathProgramCache]: Analyzing trace with hash -151626389, now seen corresponding path program 21 times [2022-03-01 18:15:39,523 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:39,523 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597103553] [2022-03-01 18:15:39,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:39,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:39,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:39,570 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 18:15:39,570 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:39,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597103553] [2022-03-01 18:15:39,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597103553] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:39,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010950331] [2022-03-01 18:15:39,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:15:39,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:39,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:39,571 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 18:15:39,572 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 18:15:39,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:15:39,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:39,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:15:39,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:39,660 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 18:15:39,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:39,705 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 18:15:39,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010950331] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:39,705 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:39,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-01 18:15:39,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777302431] [2022-03-01 18:15:39,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:39,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 18:15:39,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:39,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 18:15:39,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:15:39,706 INFO L87 Difference]: Start difference. First operand 2644 states and 8721 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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 18:15:40,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:40,007 INFO L93 Difference]: Finished difference Result 5332 states and 16988 transitions. [2022-03-01 18:15:40,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 18:15:40,007 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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 27 [2022-03-01 18:15:40,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:40,017 INFO L225 Difference]: With dead ends: 5332 [2022-03-01 18:15:40,018 INFO L226 Difference]: Without dead ends: 5316 [2022-03-01 18:15:40,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:15:40,018 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 240 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:40,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 114 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:15:40,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5316 states. [2022-03-01 18:15:40,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5316 to 2652. [2022-03-01 18:15:40,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 2651 states have (on average 3.29422859298378) internal successors, (8733), 2651 states have internal predecessors, (8733), 0 states have call successors, (0), 0 states 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 18:15:40,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 8733 transitions. [2022-03-01 18:15:40,076 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 8733 transitions. Word has length 27 [2022-03-01 18:15:40,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:40,076 INFO L470 AbstractCegarLoop]: Abstraction has 2652 states and 8733 transitions. [2022-03-01 18:15:40,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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 18:15:40,076 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 8733 transitions. [2022-03-01 18:15:40,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:15:40,080 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:40,080 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, 1] [2022-03-01 18:15:40,096 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 18:15:40,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-01 18:15:40,295 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:40,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:40,296 INFO L85 PathProgramCache]: Analyzing trace with hash -2105412629, now seen corresponding path program 22 times [2022-03-01 18:15:40,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:40,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716272691] [2022-03-01 18:15:40,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:40,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:40,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:40,334 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:40,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716272691] [2022-03-01 18:15:40,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716272691] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:40,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906037751] [2022-03-01 18:15:40,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:15:40,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:40,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:40,336 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 18:15:40,336 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 18:15:40,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:15:40,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:40,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:15:40,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:40,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:40,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:40,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:15:40,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906037751] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:40,564 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:40,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-01 18:15:40,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897375212] [2022-03-01 18:15:40,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:40,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:15:40,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:40,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:15:40,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:15:40,565 INFO L87 Difference]: Start difference. First operand 2652 states and 8733 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:41,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:41,414 INFO L93 Difference]: Finished difference Result 11005 states and 34872 transitions. [2022-03-01 18:15:41,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-01 18:15:41,415 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:15:41,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:41,438 INFO L225 Difference]: With dead ends: 11005 [2022-03-01 18:15:41,438 INFO L226 Difference]: Without dead ends: 11005 [2022-03-01 18:15:41,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=926, Invalid=2734, Unknown=0, NotChecked=0, Total=3660 [2022-03-01 18:15:41,439 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 443 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:41,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 217 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:15:41,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11005 states. [2022-03-01 18:15:41,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11005 to 3423. [2022-03-01 18:15:41,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3423 states, 3422 states have (on average 3.4585037989479837) internal successors, (11835), 3422 states have internal predecessors, (11835), 0 states have call successors, (0), 0 states 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 18:15:41,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3423 states to 3423 states and 11835 transitions. [2022-03-01 18:15:41,553 INFO L78 Accepts]: Start accepts. Automaton has 3423 states and 11835 transitions. Word has length 27 [2022-03-01 18:15:41,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:41,553 INFO L470 AbstractCegarLoop]: Abstraction has 3423 states and 11835 transitions. [2022-03-01 18:15:41,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:41,553 INFO L276 IsEmpty]: Start isEmpty. Operand 3423 states and 11835 transitions. [2022-03-01 18:15:41,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:15:41,559 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:41,559 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, 1] [2022-03-01 18:15:41,576 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 18:15:41,763 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,SelfDestructingSolverStorable27 [2022-03-01 18:15:41,764 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:41,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:41,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1995653999, now seen corresponding path program 23 times [2022-03-01 18:15:41,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:41,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310974129] [2022-03-01 18:15:41,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:41,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:41,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:41,814 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:41,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310974129] [2022-03-01 18:15:41,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310974129] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:41,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470843690] [2022-03-01 18:15:41,815 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:15:41,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:41,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:41,816 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 18:15:41,828 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 18:15:41,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:15:41,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:41,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:15:41,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:41,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:41,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:41,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:15:41,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470843690] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:41,967 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:41,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-01 18:15:41,968 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083885223] [2022-03-01 18:15:41,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:41,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:15:41,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:41,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:15:41,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:15:41,968 INFO L87 Difference]: Start difference. First operand 3423 states and 11835 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:42,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:42,539 INFO L93 Difference]: Finished difference Result 9376 states and 29674 transitions. [2022-03-01 18:15:42,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 18:15:42,539 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:15:42,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:42,556 INFO L225 Difference]: With dead ends: 9376 [2022-03-01 18:15:42,557 INFO L226 Difference]: Without dead ends: 9376 [2022-03-01 18:15:42,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=860, Invalid=2220, Unknown=0, NotChecked=0, Total=3080 [2022-03-01 18:15:42,558 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 549 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:42,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 192 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:15:42,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9376 states. [2022-03-01 18:15:42,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9376 to 3420. [2022-03-01 18:15:42,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3420 states, 3419 states have (on average 3.4574436969874234) internal successors, (11821), 3419 states have internal predecessors, (11821), 0 states have call successors, (0), 0 states 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 18:15:42,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 11821 transitions. [2022-03-01 18:15:42,680 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 11821 transitions. Word has length 27 [2022-03-01 18:15:42,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:42,680 INFO L470 AbstractCegarLoop]: Abstraction has 3420 states and 11821 transitions. [2022-03-01 18:15:42,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:42,680 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 11821 transitions. [2022-03-01 18:15:42,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:15:42,686 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:42,686 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, 1] [2022-03-01 18:15:42,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:42,901 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,SelfDestructingSolverStorable28 [2022-03-01 18:15:42,901 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:42,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:42,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1623744233, now seen corresponding path program 24 times [2022-03-01 18:15:42,902 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:42,902 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313068721] [2022-03-01 18:15:42,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:42,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:42,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:42,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:42,935 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:42,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313068721] [2022-03-01 18:15:42,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313068721] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:42,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085271169] [2022-03-01 18:15:42,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:15:42,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:42,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:42,939 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 18:15:42,940 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 18:15:42,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 18:15:42,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:42,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:15:42,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:43,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:43,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:43,062 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 18:15:43,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085271169] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:43,062 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:43,062 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-01 18:15:43,062 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118063683] [2022-03-01 18:15:43,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:43,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 18:15:43,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:43,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 18:15:43,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:15:43,063 INFO L87 Difference]: Start difference. First operand 3420 states and 11821 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:43,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:43,568 INFO L93 Difference]: Finished difference Result 10210 states and 32078 transitions. [2022-03-01 18:15:43,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-01 18:15:43,569 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:15:43,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:43,588 INFO L225 Difference]: With dead ends: 10210 [2022-03-01 18:15:43,589 INFO L226 Difference]: Without dead ends: 10210 [2022-03-01 18:15:43,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 18:15:43,590 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 397 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:43,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 188 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:15:43,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10210 states. [2022-03-01 18:15:43,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10210 to 3434. [2022-03-01 18:15:43,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 3.459364986891931) internal successors, (11876), 3433 states have internal predecessors, (11876), 0 states have call successors, (0), 0 states 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 18:15:43,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 11876 transitions. [2022-03-01 18:15:43,719 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 11876 transitions. Word has length 27 [2022-03-01 18:15:43,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:43,720 INFO L470 AbstractCegarLoop]: Abstraction has 3434 states and 11876 transitions. [2022-03-01 18:15:43,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:43,720 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 11876 transitions. [2022-03-01 18:15:43,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:15:43,725 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:43,725 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, 1] [2022-03-01 18:15:43,740 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 18:15:43,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:43,940 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:43,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:43,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1434525935, now seen corresponding path program 25 times [2022-03-01 18:15:43,941 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:43,941 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999905037] [2022-03-01 18:15:43,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:43,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:43,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:43,980 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 18:15:43,980 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:43,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999905037] [2022-03-01 18:15:43,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999905037] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:43,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617054806] [2022-03-01 18:15:43,980 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:15:43,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:43,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:43,982 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 18:15:43,982 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 18:15:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:44,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:15:44,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:44,085 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 18:15:44,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:44,164 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 18:15:44,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617054806] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:44,165 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:44,165 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-01 18:15:44,165 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257795981] [2022-03-01 18:15:44,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:44,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 18:15:44,165 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:44,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 18:15:44,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:15:44,166 INFO L87 Difference]: Start difference. First operand 3434 states and 11876 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:44,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:44,843 INFO L93 Difference]: Finished difference Result 9874 states and 31277 transitions. [2022-03-01 18:15:44,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 18:15:44,843 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:15:44,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:44,861 INFO L225 Difference]: With dead ends: 9874 [2022-03-01 18:15:44,861 INFO L226 Difference]: Without dead ends: 9870 [2022-03-01 18:15:44,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 18:15:44,862 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 412 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:44,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 185 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:15:44,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9870 states. [2022-03-01 18:15:44,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9870 to 3434. [2022-03-01 18:15:44,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 3.45819982522575) internal successors, (11872), 3433 states have internal predecessors, (11872), 0 states have call successors, (0), 0 states 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 18:15:44,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 11872 transitions. [2022-03-01 18:15:44,993 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 11872 transitions. Word has length 27 [2022-03-01 18:15:44,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:44,993 INFO L470 AbstractCegarLoop]: Abstraction has 3434 states and 11872 transitions. [2022-03-01 18:15:44,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:44,993 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 11872 transitions. [2022-03-01 18:15:45,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:15:45,001 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:45,001 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, 1] [2022-03-01 18:15:45,033 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 18:15:45,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:45,211 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:45,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:45,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1470920145, now seen corresponding path program 26 times [2022-03-01 18:15:45,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:45,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830072422] [2022-03-01 18:15:45,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:45,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:45,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:45,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:45,246 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:45,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830072422] [2022-03-01 18:15:45,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830072422] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:45,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077403807] [2022-03-01 18:15:45,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:15:45,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:45,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:45,247 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 18:15:45,248 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 18:15:45,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:15:45,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:45,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:15:45,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:45,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:45,392 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 18:15:45,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077403807] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:45,393 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:45,393 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-01 18:15:45,393 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775935632] [2022-03-01 18:15:45,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:45,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:15:45,394 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:45,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:15:45,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:15:45,394 INFO L87 Difference]: Start difference. First operand 3434 states and 11872 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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 18:15:46,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:46,043 INFO L93 Difference]: Finished difference Result 8065 states and 25290 transitions. [2022-03-01 18:15:46,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 18:15:46,043 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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 27 [2022-03-01 18:15:46,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:46,059 INFO L225 Difference]: With dead ends: 8065 [2022-03-01 18:15:46,059 INFO L226 Difference]: Without dead ends: 8065 [2022-03-01 18:15:46,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=640, Invalid=1616, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 18:15:46,060 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 424 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:46,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 229 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:15:46,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8065 states. [2022-03-01 18:15:46,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8065 to 3440. [2022-03-01 18:15:46,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3440 states, 3439 states have (on average 3.4594358825239895) internal successors, (11897), 3439 states have internal predecessors, (11897), 0 states have call successors, (0), 0 states 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 18:15:46,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3440 states to 3440 states and 11897 transitions. [2022-03-01 18:15:46,161 INFO L78 Accepts]: Start accepts. Automaton has 3440 states and 11897 transitions. Word has length 27 [2022-03-01 18:15:46,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:46,162 INFO L470 AbstractCegarLoop]: Abstraction has 3440 states and 11897 transitions. [2022-03-01 18:15:46,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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 18:15:46,162 INFO L276 IsEmpty]: Start isEmpty. Operand 3440 states and 11897 transitions. [2022-03-01 18:15:46,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:15:46,169 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:46,169 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, 1] [2022-03-01 18:15:46,185 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 18:15:46,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:46,385 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:46,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:46,385 INFO L85 PathProgramCache]: Analyzing trace with hash 311729325, now seen corresponding path program 27 times [2022-03-01 18:15:46,386 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:46,386 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760312697] [2022-03-01 18:15:46,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:46,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:46,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:46,444 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 18:15:46,445 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:46,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760312697] [2022-03-01 18:15:46,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760312697] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:46,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481883425] [2022-03-01 18:15:46,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:15:46,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:46,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:46,446 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 18:15:46,447 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 18:15:46,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:15:46,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:46,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:15:46,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:46,558 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 18:15:46,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:46,647 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 18:15:46,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481883425] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:46,647 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:46,647 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-01 18:15:46,647 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765035097] [2022-03-01 18:15:46,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:46,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:15:46,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:46,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:15:46,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:15:46,648 INFO L87 Difference]: Start difference. First operand 3440 states and 11897 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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 18:15:47,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:47,362 INFO L93 Difference]: Finished difference Result 7992 states and 25480 transitions. [2022-03-01 18:15:47,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 18:15:47,362 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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 27 [2022-03-01 18:15:47,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:47,382 INFO L225 Difference]: With dead ends: 7992 [2022-03-01 18:15:47,382 INFO L226 Difference]: Without dead ends: 7988 [2022-03-01 18:15:47,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=800, Invalid=2392, Unknown=0, NotChecked=0, Total=3192 [2022-03-01 18:15:47,383 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 511 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:47,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 187 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:15:47,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7988 states. [2022-03-01 18:15:47,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7988 to 3434. [2022-03-01 18:15:47,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 3.45819982522575) internal successors, (11872), 3433 states have internal predecessors, (11872), 0 states have call successors, (0), 0 states 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 18:15:47,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 11872 transitions. [2022-03-01 18:15:47,478 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 11872 transitions. Word has length 27 [2022-03-01 18:15:47,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:47,478 INFO L470 AbstractCegarLoop]: Abstraction has 3434 states and 11872 transitions. [2022-03-01 18:15:47,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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 18:15:47,479 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 11872 transitions. [2022-03-01 18:15:47,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:15:47,485 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:47,485 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, 1] [2022-03-01 18:15:47,500 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 18:15:47,700 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,SelfDestructingSolverStorable32 [2022-03-01 18:15:47,700 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:47,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:47,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1354997805, now seen corresponding path program 28 times [2022-03-01 18:15:47,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:47,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830267703] [2022-03-01 18:15:47,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:47,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:47,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:47,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:47,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:47,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830267703] [2022-03-01 18:15:47,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830267703] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:47,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852086781] [2022-03-01 18:15:47,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:15:47,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:47,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:47,733 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 18:15:47,734 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 18:15:47,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:15:47,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:47,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:15:47,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:47,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:47,887 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 18:15:47,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852086781] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:47,887 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:47,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:15:47,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333889206] [2022-03-01 18:15:47,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:47,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:15:47,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:47,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:15:47,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:15:47,888 INFO L87 Difference]: Start difference. First operand 3434 states and 11872 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:48,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:48,644 INFO L93 Difference]: Finished difference Result 8817 states and 28422 transitions. [2022-03-01 18:15:48,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 18:15:48,644 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:15:48,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:48,664 INFO L225 Difference]: With dead ends: 8817 [2022-03-01 18:15:48,664 INFO L226 Difference]: Without dead ends: 8817 [2022-03-01 18:15:48,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=699, Invalid=2271, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 18:15:48,665 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 334 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:48,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 177 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:15:48,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8817 states. [2022-03-01 18:15:48,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8817 to 3737. [2022-03-01 18:15:48,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 3736 states have (on average 3.4494111349036403) internal successors, (12887), 3736 states have internal predecessors, (12887), 0 states have call successors, (0), 0 states 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 18:15:48,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 12887 transitions. [2022-03-01 18:15:48,810 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 12887 transitions. Word has length 27 [2022-03-01 18:15:48,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:48,810 INFO L470 AbstractCegarLoop]: Abstraction has 3737 states and 12887 transitions. [2022-03-01 18:15:48,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:48,810 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 12887 transitions. [2022-03-01 18:15:48,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:15:48,817 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:48,817 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, 1] [2022-03-01 18:15:48,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:49,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:49,033 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:49,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:49,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1165779507, now seen corresponding path program 29 times [2022-03-01 18:15:49,034 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:49,034 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125105005] [2022-03-01 18:15:49,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:49,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:49,074 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 18:15:49,074 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:49,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125105005] [2022-03-01 18:15:49,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125105005] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:49,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79288289] [2022-03-01 18:15:49,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:15:49,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:49,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:49,088 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 18:15:49,089 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 18:15:49,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:15:49,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:49,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:15:49,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:49,156 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 18:15:49,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:49,222 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 18:15:49,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79288289] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:49,222 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:49,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:15:49,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273626259] [2022-03-01 18:15:49,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:49,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:15:49,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:49,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:15:49,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:15:49,223 INFO L87 Difference]: Start difference. First operand 3737 states and 12887 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:49,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:49,924 INFO L93 Difference]: Finished difference Result 8396 states and 27364 transitions. [2022-03-01 18:15:49,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 18:15:49,924 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:15:49,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:49,946 INFO L225 Difference]: With dead ends: 8396 [2022-03-01 18:15:49,946 INFO L226 Difference]: Without dead ends: 8388 [2022-03-01 18:15:49,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 18:15:49,947 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 278 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:49,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 173 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:15:49,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8388 states. [2022-03-01 18:15:50,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8388 to 3725. [2022-03-01 18:15:50,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3725 states, 3724 states have (on average 3.44656283566058) internal successors, (12835), 3724 states have internal predecessors, (12835), 0 states have call successors, (0), 0 states 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 18:15:50,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3725 states to 3725 states and 12835 transitions. [2022-03-01 18:15:50,062 INFO L78 Accepts]: Start accepts. Automaton has 3725 states and 12835 transitions. Word has length 27 [2022-03-01 18:15:50,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:50,063 INFO L470 AbstractCegarLoop]: Abstraction has 3725 states and 12835 transitions. [2022-03-01 18:15:50,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:50,063 INFO L276 IsEmpty]: Start isEmpty. Operand 3725 states and 12835 transitions. [2022-03-01 18:15:50,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:15:50,069 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:50,070 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, 1] [2022-03-01 18:15:50,094 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 18:15:50,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:50,289 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:50,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:50,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1809161767, now seen corresponding path program 30 times [2022-03-01 18:15:50,289 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:50,289 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177176028] [2022-03-01 18:15:50,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:50,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:50,335 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 18:15:50,335 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:50,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177176028] [2022-03-01 18:15:50,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177176028] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:50,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703664689] [2022-03-01 18:15:50,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:15:50,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:50,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:50,337 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 18:15:50,339 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 18:15:50,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:15:50,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:50,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:15:50,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:50,460 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 18:15:50,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:50,508 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 18:15:50,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703664689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:50,509 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:50,509 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:15:50,509 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771426968] [2022-03-01 18:15:50,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:50,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:15:50,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:50,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:15:50,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:15:50,510 INFO L87 Difference]: Start difference. First operand 3725 states and 12835 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:51,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:51,045 INFO L93 Difference]: Finished difference Result 9052 states and 28913 transitions. [2022-03-01 18:15:51,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-01 18:15:51,045 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:15:51,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:51,062 INFO L225 Difference]: With dead ends: 9052 [2022-03-01 18:15:51,062 INFO L226 Difference]: Without dead ends: 9036 [2022-03-01 18:15:51,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2022-03-01 18:15:51,063 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 304 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:51,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 188 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:15:51,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9036 states. [2022-03-01 18:15:51,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9036 to 3753. [2022-03-01 18:15:51,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3753 states, 3752 states have (on average 3.446961620469083) internal successors, (12933), 3752 states have internal predecessors, (12933), 0 states have call successors, (0), 0 states 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 18:15:51,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 12933 transitions. [2022-03-01 18:15:51,163 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 12933 transitions. Word has length 27 [2022-03-01 18:15:51,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:51,164 INFO L470 AbstractCegarLoop]: Abstraction has 3753 states and 12933 transitions. [2022-03-01 18:15:51,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:51,164 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 12933 transitions. [2022-03-01 18:15:51,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:15:51,169 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:51,169 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, 1] [2022-03-01 18:15:51,185 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 18:15:51,379 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,SelfDestructingSolverStorable35 [2022-03-01 18:15:51,380 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:51,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:51,380 INFO L85 PathProgramCache]: Analyzing trace with hash 2121517739, now seen corresponding path program 31 times [2022-03-01 18:15:51,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:51,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087595376] [2022-03-01 18:15:51,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:51,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:51,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:51,423 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:51,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087595376] [2022-03-01 18:15:51,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087595376] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:51,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332179799] [2022-03-01 18:15:51,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:15:51,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:51,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:51,424 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 18:15:51,425 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 18:15:51,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:51,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:15:51,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:51,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:51,668 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 18:15:51,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332179799] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:51,668 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:51,668 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-01 18:15:51,668 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518390270] [2022-03-01 18:15:51,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:51,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:15:51,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:51,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:15:51,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:15:51,669 INFO L87 Difference]: Start difference. First operand 3753 states and 12933 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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 18:15:52,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:52,286 INFO L93 Difference]: Finished difference Result 7240 states and 23141 transitions. [2022-03-01 18:15:52,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-01 18:15:52,287 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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 27 [2022-03-01 18:15:52,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:52,300 INFO L225 Difference]: With dead ends: 7240 [2022-03-01 18:15:52,300 INFO L226 Difference]: Without dead ends: 7240 [2022-03-01 18:15:52,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=678, Invalid=1772, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 18:15:52,315 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 424 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:52,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 275 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:15:52,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7240 states. [2022-03-01 18:15:52,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7240 to 3938. [2022-03-01 18:15:52,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3938 states, 3937 states have (on average 3.4384048768097535) internal successors, (13537), 3937 states have internal predecessors, (13537), 0 states have call successors, (0), 0 states 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 18:15:52,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3938 states to 3938 states and 13537 transitions. [2022-03-01 18:15:52,405 INFO L78 Accepts]: Start accepts. Automaton has 3938 states and 13537 transitions. Word has length 27 [2022-03-01 18:15:52,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:52,405 INFO L470 AbstractCegarLoop]: Abstraction has 3938 states and 13537 transitions. [2022-03-01 18:15:52,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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 18:15:52,405 INFO L276 IsEmpty]: Start isEmpty. Operand 3938 states and 13537 transitions. [2022-03-01 18:15:52,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:15:52,410 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:52,410 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, 1] [2022-03-01 18:15:52,426 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 18:15:52,624 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,SelfDestructingSolverStorable36 [2022-03-01 18:15:52,624 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:52,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:52,624 INFO L85 PathProgramCache]: Analyzing trace with hash -390800087, now seen corresponding path program 32 times [2022-03-01 18:15:52,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:52,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669819540] [2022-03-01 18:15:52,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:52,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:52,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:52,674 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 18:15:52,674 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:52,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669819540] [2022-03-01 18:15:52,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669819540] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:52,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945975574] [2022-03-01 18:15:52,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:15:52,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:52,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:52,675 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 18:15:52,678 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 18:15:52,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:15:52,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:52,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:15:52,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:52,809 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 18:15:52,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:52,905 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 18:15:52,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945975574] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:52,905 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:52,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-01 18:15:52,905 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124030572] [2022-03-01 18:15:52,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:52,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:15:52,906 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:52,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:15:52,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:15:52,906 INFO L87 Difference]: Start difference. First operand 3938 states and 13537 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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 18:15:53,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:53,596 INFO L93 Difference]: Finished difference Result 7155 states and 23290 transitions. [2022-03-01 18:15:53,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 18:15:53,596 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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 27 [2022-03-01 18:15:53,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:53,615 INFO L225 Difference]: With dead ends: 7155 [2022-03-01 18:15:53,615 INFO L226 Difference]: Without dead ends: 7151 [2022-03-01 18:15:53,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=880, Invalid=2780, Unknown=0, NotChecked=0, Total=3660 [2022-03-01 18:15:53,616 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 414 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:53,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 195 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:15:53,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7151 states. [2022-03-01 18:15:53,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7151 to 3936. [2022-03-01 18:15:53,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3936 states, 3935 states have (on average 3.4373570520965693) internal successors, (13526), 3935 states have internal predecessors, (13526), 0 states have call successors, (0), 0 states 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 18:15:53,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3936 states to 3936 states and 13526 transitions. [2022-03-01 18:15:53,740 INFO L78 Accepts]: Start accepts. Automaton has 3936 states and 13526 transitions. Word has length 27 [2022-03-01 18:15:53,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:53,740 INFO L470 AbstractCegarLoop]: Abstraction has 3936 states and 13526 transitions. [2022-03-01 18:15:53,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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 18:15:53,741 INFO L276 IsEmpty]: Start isEmpty. Operand 3936 states and 13526 transitions. [2022-03-01 18:15:53,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:15:53,748 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:53,748 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, 1] [2022-03-01 18:15:53,773 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 18:15:53,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-01 18:15:53,967 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:53,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:53,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1235771539, now seen corresponding path program 33 times [2022-03-01 18:15:53,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:53,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180182193] [2022-03-01 18:15:53,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:53,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:53,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:54,018 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 18:15:54,019 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:54,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180182193] [2022-03-01 18:15:54,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180182193] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:54,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224113013] [2022-03-01 18:15:54,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:15:54,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:54,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:54,020 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 18:15:54,022 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 18:15:54,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:15:54,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:54,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:15:54,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:54,103 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 18:15:54,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:54,159 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 18:15:54,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224113013] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:54,160 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:54,160 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 18:15:54,160 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465955686] [2022-03-01 18:15:54,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:54,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:15:54,160 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:54,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:15:54,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:15:54,161 INFO L87 Difference]: Start difference. First operand 3936 states and 13526 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:54,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:54,696 INFO L93 Difference]: Finished difference Result 6859 states and 22528 transitions. [2022-03-01 18:15:54,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 18:15:54,696 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:15:54,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:54,715 INFO L225 Difference]: With dead ends: 6859 [2022-03-01 18:15:54,716 INFO L226 Difference]: Without dead ends: 6843 [2022-03-01 18:15:54,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 18:15:54,717 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 286 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:54,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 170 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:15:54,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6843 states. [2022-03-01 18:15:54,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6843 to 3932. [2022-03-01 18:15:54,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3932 states, 3931 states have (on average 3.435766980412109) internal successors, (13506), 3931 states have internal predecessors, (13506), 0 states have call successors, (0), 0 states 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 18:15:54,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3932 states to 3932 states and 13506 transitions. [2022-03-01 18:15:54,857 INFO L78 Accepts]: Start accepts. Automaton has 3932 states and 13506 transitions. Word has length 27 [2022-03-01 18:15:54,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:54,858 INFO L470 AbstractCegarLoop]: Abstraction has 3932 states and 13506 transitions. [2022-03-01 18:15:54,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:54,858 INFO L276 IsEmpty]: Start isEmpty. Operand 3932 states and 13506 transitions. [2022-03-01 18:15:54,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:15:54,865 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:54,866 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, 1, 1, 1, 1] [2022-03-01 18:15:54,889 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 18:15:55,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-01 18:15:55,088 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:15:55,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:55,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1788265295, now seen corresponding path program 4 times [2022-03-01 18:15:55,089 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:55,089 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142263488] [2022-03-01 18:15:55,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:55,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:55,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:55,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:55,406 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:55,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142263488] [2022-03-01 18:15:55,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142263488] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:55,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111305271] [2022-03-01 18:15:55,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:15:55,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:55,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:55,424 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 18:15:55,452 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 18:15:55,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:15:55,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:55,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:15:55,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:55,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:55,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:55,864 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 35 [2022-03-01 18:15:55,905 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-01 18:15:55,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 30 [2022-03-01 18:15:55,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:55,909 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 16 [2022-03-01 18:15:55,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:55,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:56,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:56,257 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:56,257 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 45 treesize of output 80 [2022-03-01 18:15:56,294 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:56,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-01 18:15:56,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:56,325 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:56,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-01 18:15:58,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:58,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:58,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:58,032 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 45 treesize of output 72 [2022-03-01 18:15:58,074 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:15:58,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-01 18:15:58,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:58,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:58,093 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:58,094 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 65 treesize of output 81 [2022-03-01 18:15:58,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:58,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111305271] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:58,389 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:58,389 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-03-01 18:15:58,389 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217401146] [2022-03-01 18:15:58,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:58,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:15:58,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:58,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:15:58,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:15:58,390 INFO L87 Difference]: Start difference. First operand 3932 states and 13506 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:01,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:01,437 INFO L93 Difference]: Finished difference Result 8297 states and 25821 transitions. [2022-03-01 18:16:01,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-01 18:16:01,437 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:16:01,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:01,456 INFO L225 Difference]: With dead ends: 8297 [2022-03-01 18:16:01,456 INFO L226 Difference]: Without dead ends: 8267 [2022-03-01 18:16:01,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2321 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1225, Invalid=5581, Unknown=0, NotChecked=0, Total=6806 [2022-03-01 18:16:01,457 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 788 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 2049 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 2291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 2049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:01,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [788 Valid, 377 Invalid, 2291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 2049 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 18:16:01,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8267 states. [2022-03-01 18:16:01,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8267 to 4021. [2022-03-01 18:16:01,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4021 states, 4020 states have (on average 3.435820895522388) internal successors, (13812), 4020 states have internal predecessors, (13812), 0 states have call successors, (0), 0 states 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 18:16:01,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4021 states to 4021 states and 13812 transitions. [2022-03-01 18:16:01,566 INFO L78 Accepts]: Start accepts. Automaton has 4021 states and 13812 transitions. Word has length 30 [2022-03-01 18:16:01,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:01,567 INFO L470 AbstractCegarLoop]: Abstraction has 4021 states and 13812 transitions. [2022-03-01 18:16:01,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:01,567 INFO L276 IsEmpty]: Start isEmpty. Operand 4021 states and 13812 transitions. [2022-03-01 18:16:01,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:16:01,573 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:01,573 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, 1, 1, 1, 1] [2022-03-01 18:16:01,594 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 18:16:01,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-01 18:16:01,787 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:16:01,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:01,788 INFO L85 PathProgramCache]: Analyzing trace with hash 320892227, now seen corresponding path program 5 times [2022-03-01 18:16:01,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:01,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75157573] [2022-03-01 18:16:01,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:01,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:01,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:02,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:02,087 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:02,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75157573] [2022-03-01 18:16:02,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75157573] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:02,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152399417] [2022-03-01 18:16:02,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:16:02,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:02,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:02,089 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 18:16:02,091 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 18:16:02,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:16:02,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:16:02,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:16:02,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:02,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:02,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:02,484 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 45 treesize of output 37 [2022-03-01 18:16:02,500 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-01 18:16:02,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 32 [2022-03-01 18:16:02,504 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 16 [2022-03-01 18:16:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:02,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:02,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:02,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:16:02,939 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 46 treesize of output 81 [2022-03-01 18:16:02,975 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:16:02,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-01 18:16:02,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:03,006 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:16:03,006 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 97 treesize of output 111 [2022-03-01 18:16:04,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:04,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:04,599 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:16:04,599 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 45 treesize of output 72 [2022-03-01 18:16:04,649 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:16:04,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-01 18:16:04,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:04,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:04,675 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:16:04,676 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 65 treesize of output 81 [2022-03-01 18:16:05,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:05,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152399417] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:05,060 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:05,060 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-03-01 18:16:05,060 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636749518] [2022-03-01 18:16:05,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:05,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 18:16:05,060 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:05,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 18:16:05,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:16:05,061 INFO L87 Difference]: Start difference. First operand 4021 states and 13812 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 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 18:16:11,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:11,397 INFO L93 Difference]: Finished difference Result 8479 states and 26125 transitions. [2022-03-01 18:16:11,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-01 18:16:11,398 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 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 18:16:11,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:11,418 INFO L225 Difference]: With dead ends: 8479 [2022-03-01 18:16:11,418 INFO L226 Difference]: Without dead ends: 8434 [2022-03-01 18:16:11,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3618 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1622, Invalid=9298, Unknown=0, NotChecked=0, Total=10920 [2022-03-01 18:16:11,420 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 753 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 2235 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 2440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 2235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:11,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 524 Invalid, 2440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 2235 Invalid, 0 Unknown, 34 Unchecked, 1.5s Time] [2022-03-01 18:16:11,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8434 states. [2022-03-01 18:16:11,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8434 to 4035. [2022-03-01 18:16:11,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4035 states, 4034 states have (on average 3.4338125929598413) internal successors, (13852), 4034 states have internal predecessors, (13852), 0 states have call successors, (0), 0 states 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 18:16:11,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4035 states to 4035 states and 13852 transitions. [2022-03-01 18:16:11,549 INFO L78 Accepts]: Start accepts. Automaton has 4035 states and 13852 transitions. Word has length 30 [2022-03-01 18:16:11,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:11,550 INFO L470 AbstractCegarLoop]: Abstraction has 4035 states and 13852 transitions. [2022-03-01 18:16:11,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 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 18:16:11,550 INFO L276 IsEmpty]: Start isEmpty. Operand 4035 states and 13852 transitions. [2022-03-01 18:16:11,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:16:11,557 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:11,557 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, 1, 1, 1, 1] [2022-03-01 18:16:11,580 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 18:16:11,779 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,SelfDestructingSolverStorable40 [2022-03-01 18:16:11,779 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:16:11,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:11,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1230267193, now seen corresponding path program 6 times [2022-03-01 18:16:11,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:11,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763134980] [2022-03-01 18:16:11,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:11,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:11,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:12,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:12,229 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:12,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763134980] [2022-03-01 18:16:12,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763134980] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:12,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714162961] [2022-03-01 18:16:12,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:16:12,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:12,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:12,231 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 18:16:12,232 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 18:16:12,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:16:12,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:16:12,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 18:16:12,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:12,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:12,710 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:16:12,710 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2022-03-01 18:16:12,747 INFO L353 Elim1Store]: treesize reduction 41, result has 55.9 percent of original size [2022-03-01 18:16:12,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 42 treesize of output 69 [2022-03-01 18:16:12,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:12,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:16:12,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-03-01 18:16:12,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:12,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:13,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:13,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:13,414 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:16:13,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 73 [2022-03-01 18:16:13,452 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:16:13,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-01 18:16:13,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:13,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:13,479 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:16:13,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 97 treesize of output 103 [2022-03-01 18:16:15,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:15,534 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 45 treesize of output 35 [2022-03-01 18:16:15,559 INFO L353 Elim1Store]: treesize reduction 65, result has 28.6 percent of original size [2022-03-01 18:16:15,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 35 [2022-03-01 18:16:15,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:15,566 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 17 treesize of output 11 [2022-03-01 18:16:15,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:15,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714162961] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:15,725 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:15,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 35 [2022-03-01 18:16:15,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817200379] [2022-03-01 18:16:15,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:15,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 18:16:15,726 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:15,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 18:16:15,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:16:15,727 INFO L87 Difference]: Start difference. First operand 4035 states and 13852 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:30,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:30,371 INFO L93 Difference]: Finished difference Result 8482 states and 27612 transitions. [2022-03-01 18:16:30,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-03-01 18:16:30,372 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:16:30,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:30,394 INFO L225 Difference]: With dead ends: 8482 [2022-03-01 18:16:30,394 INFO L226 Difference]: Without dead ends: 8431 [2022-03-01 18:16:30,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12021 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=3638, Invalid=28582, Unknown=0, NotChecked=0, Total=32220 [2022-03-01 18:16:30,396 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 886 mSDsluCounter, 1748 mSDsCounter, 0 mSdLazyCounter, 3654 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 5262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 3654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1345 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:30,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 917 Invalid, 5262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 3654 Invalid, 0 Unknown, 1345 Unchecked, 2.5s Time] [2022-03-01 18:16:30,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8431 states. [2022-03-01 18:16:30,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8431 to 4168. [2022-03-01 18:16:30,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4168 states, 4167 states have (on average 3.4360451163906887) internal successors, (14318), 4167 states have internal predecessors, (14318), 0 states have call successors, (0), 0 states 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 18:16:30,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 14318 transitions. [2022-03-01 18:16:30,505 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 14318 transitions. Word has length 30 [2022-03-01 18:16:30,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:30,506 INFO L470 AbstractCegarLoop]: Abstraction has 4168 states and 14318 transitions. [2022-03-01 18:16:30,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:30,506 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 14318 transitions. [2022-03-01 18:16:30,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:16:30,513 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:30,513 INFO L514 BasicCegarLoop]: trace histogram [2, 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 18:16:30,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-01 18:16:30,736 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,SelfDestructingSolverStorable41 [2022-03-01 18:16:30,736 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:16:30,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:30,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1586750758, now seen corresponding path program 34 times [2022-03-01 18:16:30,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:30,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322794675] [2022-03-01 18:16:30,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:30,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:30,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:31,276 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 18:16:31,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:31,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322794675] [2022-03-01 18:16:31,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322794675] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:31,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103271152] [2022-03-01 18:16:31,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:16:31,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:31,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:31,278 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 18:16:31,279 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 18:16:31,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:16:31,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:16:31,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:16:31,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:31,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:31,757 INFO L353 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2022-03-01 18:16:31,758 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 222 treesize of output 188 [2022-03-01 18:16:31,779 INFO L353 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2022-03-01 18:16:31,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 133 treesize of output 79 [2022-03-01 18:16:31,783 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 16 [2022-03-01 18:16:31,819 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 18:16:31,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:32,102 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:16:32,103 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 49 treesize of output 74 [2022-03-01 18:16:32,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:16:32,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 112 [2022-03-01 18:16:32,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:32,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:32,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:16:32,175 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 103 treesize of output 107 [2022-03-01 18:16:32,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:32,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:32,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:32,458 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 38 [2022-03-01 18:16:32,478 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-03-01 18:16:32,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 38 treesize of output 36 [2022-03-01 18:16:32,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:32,482 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 17 treesize of output 11 [2022-03-01 18:16:32,570 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 18:16:32,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103271152] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:32,571 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:32,571 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-03-01 18:16:32,571 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112930197] [2022-03-01 18:16:32,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:32,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:16:32,571 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:32,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:16:32,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:16:32,572 INFO L87 Difference]: Start difference. First operand 4168 states and 14318 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:38,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:38,343 INFO L93 Difference]: Finished difference Result 7550 states and 24891 transitions. [2022-03-01 18:16:38,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-01 18:16:38,343 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:16:38,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:38,363 INFO L225 Difference]: With dead ends: 7550 [2022-03-01 18:16:38,363 INFO L226 Difference]: Without dead ends: 7503 [2022-03-01 18:16:38,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2930 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1324, Invalid=8182, Unknown=0, NotChecked=0, Total=9506 [2022-03-01 18:16:38,364 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 512 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 2533 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 2831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 2533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:38,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 422 Invalid, 2831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 2533 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-01 18:16:38,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7503 states. [2022-03-01 18:16:38,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7503 to 4247. [2022-03-01 18:16:38,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4247 states, 4246 states have (on average 3.425341497880358) internal successors, (14544), 4246 states have internal predecessors, (14544), 0 states have call successors, (0), 0 states 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 18:16:38,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4247 states to 4247 states and 14544 transitions. [2022-03-01 18:16:38,474 INFO L78 Accepts]: Start accepts. Automaton has 4247 states and 14544 transitions. Word has length 30 [2022-03-01 18:16:38,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:38,474 INFO L470 AbstractCegarLoop]: Abstraction has 4247 states and 14544 transitions. [2022-03-01 18:16:38,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:38,475 INFO L276 IsEmpty]: Start isEmpty. Operand 4247 states and 14544 transitions. [2022-03-01 18:16:38,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:16:38,482 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:38,482 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, 1, 1, 1, 1] [2022-03-01 18:16:38,507 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 18:16:38,706 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,SelfDestructingSolverStorable42 [2022-03-01 18:16:38,706 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:16:38,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:38,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1397852555, now seen corresponding path program 7 times [2022-03-01 18:16:38,707 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:38,707 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048916233] [2022-03-01 18:16:38,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:38,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:38,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:39,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:39,060 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:39,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048916233] [2022-03-01 18:16:39,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048916233] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:39,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179347807] [2022-03-01 18:16:39,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:16:39,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:39,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:39,061 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 18:16:39,062 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 18:16:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:39,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:16:39,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:39,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:39,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:39,510 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 35 [2022-03-01 18:16:39,527 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-01 18:16:39,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 30 [2022-03-01 18:16:39,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:39,531 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 16 [2022-03-01 18:16:39,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:39,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:39,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:39,922 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:16:39,923 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 46 treesize of output 81 [2022-03-01 18:16:39,960 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:16:39,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-01 18:16:39,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:39,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:16:39,990 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 97 treesize of output 111 [2022-03-01 18:16:42,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:42,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:42,246 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:16:42,246 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 45 treesize of output 72 [2022-03-01 18:16:42,298 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:16:42,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-01 18:16:42,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:42,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:42,325 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:16:42,325 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 65 treesize of output 81 [2022-03-01 18:16:42,849 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:42,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179347807] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:42,850 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:42,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-03-01 18:16:42,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792795161] [2022-03-01 18:16:42,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:42,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:16:42,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:42,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:16:42,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:16:42,851 INFO L87 Difference]: Start difference. First operand 4247 states and 14544 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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 18:16:48,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:48,278 INFO L93 Difference]: Finished difference Result 8973 states and 27677 transitions. [2022-03-01 18:16:48,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-01 18:16:48,278 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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 18:16:48,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:48,299 INFO L225 Difference]: With dead ends: 8973 [2022-03-01 18:16:48,299 INFO L226 Difference]: Without dead ends: 8943 [2022-03-01 18:16:48,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3242 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1712, Invalid=7408, Unknown=0, NotChecked=0, Total=9120 [2022-03-01 18:16:48,301 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 961 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 2039 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 2379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 2039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:48,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [961 Valid, 428 Invalid, 2379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 2039 Invalid, 0 Unknown, 37 Unchecked, 1.5s Time] [2022-03-01 18:16:48,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8943 states. [2022-03-01 18:16:48,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8943 to 4273. [2022-03-01 18:16:48,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4273 states, 4272 states have (on average 3.4262640449438204) internal successors, (14637), 4272 states have internal predecessors, (14637), 0 states have call successors, (0), 0 states 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 18:16:48,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4273 states to 4273 states and 14637 transitions. [2022-03-01 18:16:48,465 INFO L78 Accepts]: Start accepts. Automaton has 4273 states and 14637 transitions. Word has length 30 [2022-03-01 18:16:48,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:48,466 INFO L470 AbstractCegarLoop]: Abstraction has 4273 states and 14637 transitions. [2022-03-01 18:16:48,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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 18:16:48,466 INFO L276 IsEmpty]: Start isEmpty. Operand 4273 states and 14637 transitions. [2022-03-01 18:16:48,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:16:48,473 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:48,473 INFO L514 BasicCegarLoop]: trace histogram [2, 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 18:16:48,495 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 18:16:48,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:48,695 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:16:48,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:48,696 INFO L85 PathProgramCache]: Analyzing trace with hash 583866602, now seen corresponding path program 35 times [2022-03-01 18:16:48,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:48,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189784201] [2022-03-01 18:16:48,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:48,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:48,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:49,188 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 18:16:49,189 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:49,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189784201] [2022-03-01 18:16:49,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189784201] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:49,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607433356] [2022-03-01 18:16:49,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:16:49,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:49,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:49,190 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 18:16:49,191 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 18:16:49,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:16:49,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:16:49,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 18:16:49,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:49,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:49,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:49,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:49,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2022-03-01 18:16:49,611 INFO L353 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2022-03-01 18:16:49,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 33 [2022-03-01 18:16:49,613 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 16 [2022-03-01 18:16:49,638 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 18:16:49,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:49,869 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:16:49,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 74 [2022-03-01 18:16:49,895 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:16:49,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 112 [2022-03-01 18:16:49,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:49,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:49,914 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:16:49,914 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 103 treesize of output 107 [2022-03-01 18:16:52,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:52,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:52,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:52,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 38 [2022-03-01 18:16:52,244 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-03-01 18:16:52,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 38 treesize of output 36 [2022-03-01 18:16:52,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:52,248 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 17 treesize of output 11 [2022-03-01 18:16:52,354 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 18:16:52,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607433356] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:52,354 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:52,354 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-03-01 18:16:52,354 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107417590] [2022-03-01 18:16:52,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:52,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:16:52,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:52,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:16:52,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:16:52,355 INFO L87 Difference]: Start difference. First operand 4273 states and 14637 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 18:17:01,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:01,034 INFO L93 Difference]: Finished difference Result 9455 states and 30775 transitions. [2022-03-01 18:17:01,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-01 18:17:01,035 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 18:17:01,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:01,058 INFO L225 Difference]: With dead ends: 9455 [2022-03-01 18:17:01,058 INFO L226 Difference]: Without dead ends: 9408 [2022-03-01 18:17:01,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5663 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=2512, Invalid=12740, Unknown=0, NotChecked=0, Total=15252 [2022-03-01 18:17:01,059 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 741 mSDsluCounter, 1353 mSDsCounter, 0 mSdLazyCounter, 3557 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 4039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 3557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:01,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [741 Valid, 721 Invalid, 4039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 3557 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-01 18:17:01,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9408 states. [2022-03-01 18:17:01,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9408 to 4295. [2022-03-01 18:17:01,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4295 states, 4294 states have (on average 3.426408942710759) internal successors, (14713), 4294 states have internal predecessors, (14713), 0 states have call successors, (0), 0 states 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 18:17:01,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4295 states to 4295 states and 14713 transitions. [2022-03-01 18:17:01,179 INFO L78 Accepts]: Start accepts. Automaton has 4295 states and 14713 transitions. Word has length 30 [2022-03-01 18:17:01,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:01,179 INFO L470 AbstractCegarLoop]: Abstraction has 4295 states and 14713 transitions. [2022-03-01 18:17:01,179 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 18:17:01,179 INFO L276 IsEmpty]: Start isEmpty. Operand 4295 states and 14713 transitions. [2022-03-01 18:17:01,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:17:01,187 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:01,187 INFO L514 BasicCegarLoop]: trace histogram [2, 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 18:17:01,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-01 18:17:01,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:01,401 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:01,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:01,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1072387290, now seen corresponding path program 36 times [2022-03-01 18:17:01,402 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:01,402 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970780543] [2022-03-01 18:17:01,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:01,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:01,990 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 18:17:01,990 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:01,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970780543] [2022-03-01 18:17:01,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970780543] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:01,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605487458] [2022-03-01 18:17:01,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:17:01,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:01,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:02,004 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 18:17:02,008 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 18:17:02,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:17:02,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:02,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 18:17:02,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:02,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:02,496 INFO L353 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2022-03-01 18:17:02,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 222 treesize of output 208 [2022-03-01 18:17:02,530 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:02,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 224 treesize of output 200 [2022-03-01 18:17:02,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:02,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:02,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:02,553 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:02,554 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 151 treesize of output 145 [2022-03-01 18:17:03,266 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 18:17:03,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:03,632 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:17:03,632 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 49 treesize of output 74 [2022-03-01 18:17:03,668 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:03,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 112 [2022-03-01 18:17:03,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:03,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:03,693 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:03,693 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 103 treesize of output 107 [2022-03-01 18:17:05,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:05,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:05,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:05,675 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 38 [2022-03-01 18:17:05,699 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-03-01 18:17:05,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 38 treesize of output 36 [2022-03-01 18:17:05,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:05,704 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 17 treesize of output 11 [2022-03-01 18:17:05,817 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 18:17:05,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605487458] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:05,818 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:05,818 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 32 [2022-03-01 18:17:05,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209018427] [2022-03-01 18:17:05,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:05,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 18:17:05,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:05,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 18:17:05,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:17:05,820 INFO L87 Difference]: Start difference. First operand 4295 states and 14713 transitions. Second operand has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 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 18:17:35,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:35,433 INFO L93 Difference]: Finished difference Result 13475 states and 43173 transitions. [2022-03-01 18:17:35,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 306 states. [2022-03-01 18:17:35,433 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 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 18:17:35,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:35,464 INFO L225 Difference]: With dead ends: 13475 [2022-03-01 18:17:35,464 INFO L226 Difference]: Without dead ends: 13421 [2022-03-01 18:17:35,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47099 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=9775, Invalid=98137, Unknown=0, NotChecked=0, Total=107912 [2022-03-01 18:17:35,469 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 1181 mSDsluCounter, 2559 mSDsCounter, 0 mSdLazyCounter, 7440 mSolverCounterSat, 618 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1181 SdHoareTripleChecker+Valid, 1589 SdHoareTripleChecker+Invalid, 8058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 618 IncrementalHoareTripleChecker+Valid, 7440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:35,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1181 Valid, 1589 Invalid, 8058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [618 Valid, 7440 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-03-01 18:17:35,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13421 states. [2022-03-01 18:17:35,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13421 to 4466. [2022-03-01 18:17:35,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4466 states, 4465 states have (on average 3.4150055991041435) internal successors, (15248), 4465 states have internal predecessors, (15248), 0 states have call successors, (0), 0 states 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 18:17:35,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4466 states to 4466 states and 15248 transitions. [2022-03-01 18:17:35,659 INFO L78 Accepts]: Start accepts. Automaton has 4466 states and 15248 transitions. Word has length 30 [2022-03-01 18:17:35,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:35,659 INFO L470 AbstractCegarLoop]: Abstraction has 4466 states and 15248 transitions. [2022-03-01 18:17:35,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 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 18:17:35,659 INFO L276 IsEmpty]: Start isEmpty. Operand 4466 states and 15248 transitions. [2022-03-01 18:17:35,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:17:35,666 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:35,666 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, 1, 1, 1, 1] [2022-03-01 18:17:35,683 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 18:17:35,883 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,SelfDestructingSolverStorable45 [2022-03-01 18:17:35,883 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:35,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:35,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1552290073, now seen corresponding path program 8 times [2022-03-01 18:17:35,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:35,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028320231] [2022-03-01 18:17:35,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:35,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:35,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:36,203 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:36,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028320231] [2022-03-01 18:17:36,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028320231] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:36,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712642358] [2022-03-01 18:17:36,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:17:36,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:36,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:36,204 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 18:17:36,205 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 18:17:36,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:17:36,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:36,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:17:36,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:36,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:36,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:36,540 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 42 [2022-03-01 18:17:36,552 INFO L353 Elim1Store]: treesize reduction 66, result has 25.8 percent of original size [2022-03-01 18:17:36,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 42 treesize of output 40 [2022-03-01 18:17:36,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:36,585 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 21 [2022-03-01 18:17:36,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:36,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:36,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:36,843 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:36,844 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 46 treesize of output 81 [2022-03-01 18:17:36,865 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:36,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-01 18:17:36,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:36,881 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:36,882 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 97 treesize of output 111 [2022-03-01 18:17:38,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:38,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:38,893 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:38,894 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 45 treesize of output 72 [2022-03-01 18:17:38,930 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:17:38,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-01 18:17:38,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:38,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:38,949 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:38,949 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 65 treesize of output 81 [2022-03-01 18:17:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:39,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712642358] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:39,292 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:39,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 32 [2022-03-01 18:17:39,292 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811645148] [2022-03-01 18:17:39,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:39,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:17:39,292 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:39,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:17:39,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:17:39,292 INFO L87 Difference]: Start difference. First operand 4466 states and 15248 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 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 18:17:43,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:43,349 INFO L93 Difference]: Finished difference Result 9266 states and 28594 transitions. [2022-03-01 18:17:43,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-01 18:17:43,349 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 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 18:17:43,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:43,366 INFO L225 Difference]: With dead ends: 9266 [2022-03-01 18:17:43,366 INFO L226 Difference]: Without dead ends: 9244 [2022-03-01 18:17:43,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3385 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1713, Invalid=7793, Unknown=0, NotChecked=0, Total=9506 [2022-03-01 18:17:43,368 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 809 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 2464 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 2852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 2464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:43,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [809 Valid, 515 Invalid, 2852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 2464 Invalid, 0 Unknown, 134 Unchecked, 1.2s Time] [2022-03-01 18:17:43,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9244 states. [2022-03-01 18:17:43,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9244 to 4458. [2022-03-01 18:17:43,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4458 states, 4457 states have (on average 3.4157505048238725) internal successors, (15224), 4457 states have internal predecessors, (15224), 0 states have call successors, (0), 0 states 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 18:17:43,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4458 states to 4458 states and 15224 transitions. [2022-03-01 18:17:43,466 INFO L78 Accepts]: Start accepts. Automaton has 4458 states and 15224 transitions. Word has length 30 [2022-03-01 18:17:43,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:43,466 INFO L470 AbstractCegarLoop]: Abstraction has 4458 states and 15224 transitions. [2022-03-01 18:17:43,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 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 18:17:43,467 INFO L276 IsEmpty]: Start isEmpty. Operand 4458 states and 15224 transitions. [2022-03-01 18:17:43,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:17:43,473 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:43,473 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, 1, 1, 1, 1] [2022-03-01 18:17:43,509 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 18:17:43,687 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,SelfDestructingSolverStorable46 [2022-03-01 18:17:43,687 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:43,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:43,688 INFO L85 PathProgramCache]: Analyzing trace with hash 912501523, now seen corresponding path program 9 times [2022-03-01 18:17:43,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:43,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146478815] [2022-03-01 18:17:43,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:43,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:43,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:43,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:43,946 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:43,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146478815] [2022-03-01 18:17:43,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146478815] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:43,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344003891] [2022-03-01 18:17:43,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:17:43,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:43,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:43,949 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 18:17:43,951 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 18:17:43,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:17:43,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:43,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 18:17:43,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:44,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:44,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:44,320 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 45 treesize of output 37 [2022-03-01 18:17:44,333 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-01 18:17:44,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 32 [2022-03-01 18:17:44,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:44,337 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 16 [2022-03-01 18:17:44,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:44,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:44,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:44,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:44,613 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 45 treesize of output 80 [2022-03-01 18:17:44,634 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:44,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-01 18:17:44,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:44,649 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:44,649 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 97 treesize of output 111 [2022-03-01 18:17:46,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:46,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:46,051 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:46,051 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 45 treesize of output 72 [2022-03-01 18:17:46,088 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:17:46,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-01 18:17:46,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:46,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:46,106 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:46,106 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 65 treesize of output 81 [2022-03-01 18:17:46,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:46,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344003891] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:46,509 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:46,509 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-03-01 18:17:46,509 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370268647] [2022-03-01 18:17:46,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:46,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:17:46,510 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:46,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:17:46,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:17:46,510 INFO L87 Difference]: Start difference. First operand 4458 states and 15224 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:50,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:50,424 INFO L93 Difference]: Finished difference Result 8337 states and 26153 transitions. [2022-03-01 18:17:50,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-01 18:17:50,424 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:17:50,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:50,441 INFO L225 Difference]: With dead ends: 8337 [2022-03-01 18:17:50,441 INFO L226 Difference]: Without dead ends: 8307 [2022-03-01 18:17:50,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2908 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1434, Invalid=6938, Unknown=0, NotChecked=0, Total=8372 [2022-03-01 18:17:50,447 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 626 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 2283 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 2513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 2283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:50,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [626 Valid, 401 Invalid, 2513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 2283 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-01 18:17:50,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8307 states. [2022-03-01 18:17:50,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8307 to 4475. [2022-03-01 18:17:50,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4475 states, 4474 states have (on average 3.4148413053196247) internal successors, (15278), 4474 states have internal predecessors, (15278), 0 states have call successors, (0), 0 states 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 18:17:50,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4475 states to 4475 states and 15278 transitions. [2022-03-01 18:17:50,544 INFO L78 Accepts]: Start accepts. Automaton has 4475 states and 15278 transitions. Word has length 30 [2022-03-01 18:17:50,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:50,544 INFO L470 AbstractCegarLoop]: Abstraction has 4475 states and 15278 transitions. [2022-03-01 18:17:50,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:50,545 INFO L276 IsEmpty]: Start isEmpty. Operand 4475 states and 15278 transitions. [2022-03-01 18:17:50,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:17:50,551 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:50,551 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, 1, 1, 1, 1] [2022-03-01 18:17:50,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-01 18:17:50,767 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,SelfDestructingSolverStorable47 [2022-03-01 18:17:50,767 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:50,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:50,768 INFO L85 PathProgramCache]: Analyzing trace with hash -554871545, now seen corresponding path program 10 times [2022-03-01 18:17:50,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:50,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051885384] [2022-03-01 18:17:50,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:50,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:50,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:51,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:51,092 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:51,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051885384] [2022-03-01 18:17:51,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051885384] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:51,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319452767] [2022-03-01 18:17:51,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:17:51,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:51,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:51,094 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 18:17:51,094 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 18:17:51,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:17:51,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:51,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:17:51,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:51,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:51,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:51,565 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 48 treesize of output 40 [2022-03-01 18:17:51,582 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-01 18:17:51,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 40 treesize of output 35 [2022-03-01 18:17:51,585 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 16 [2022-03-01 18:17:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:51,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:51,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:51,929 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:51,929 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 46 treesize of output 81 [2022-03-01 18:17:51,958 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:51,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-01 18:17:51,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:51,980 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:51,981 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 97 treesize of output 111 [2022-03-01 18:17:53,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:53,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:53,303 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:53,304 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 45 treesize of output 72 [2022-03-01 18:17:53,365 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:17:53,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-01 18:17:53,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:53,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:53,388 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:53,389 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 65 treesize of output 81 [2022-03-01 18:17:53,804 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:53,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319452767] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:53,804 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:53,804 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-03-01 18:17:53,804 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504071867] [2022-03-01 18:17:53,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:53,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:17:53,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:53,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:17:53,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:17:53,805 INFO L87 Difference]: Start difference. First operand 4475 states and 15278 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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 18:17:57,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:57,018 INFO L93 Difference]: Finished difference Result 8295 states and 26041 transitions. [2022-03-01 18:17:57,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-01 18:17:57,018 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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 18:17:57,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:57,034 INFO L225 Difference]: With dead ends: 8295 [2022-03-01 18:17:57,034 INFO L226 Difference]: Without dead ends: 8265 [2022-03-01 18:17:57,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2736 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1415, Invalid=6417, Unknown=0, NotChecked=0, Total=7832 [2022-03-01 18:17:57,035 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 693 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 1754 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 2056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:57,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [693 Valid, 326 Invalid, 2056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1754 Invalid, 0 Unknown, 95 Unchecked, 0.9s Time] [2022-03-01 18:17:57,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8265 states. [2022-03-01 18:17:57,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8265 to 4467. [2022-03-01 18:17:57,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4467 states, 4466 states have (on average 3.416256157635468) internal successors, (15257), 4466 states have internal predecessors, (15257), 0 states have call successors, (0), 0 states 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 18:17:57,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4467 states to 4467 states and 15257 transitions. [2022-03-01 18:17:57,123 INFO L78 Accepts]: Start accepts. Automaton has 4467 states and 15257 transitions. Word has length 30 [2022-03-01 18:17:57,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:57,123 INFO L470 AbstractCegarLoop]: Abstraction has 4467 states and 15257 transitions. [2022-03-01 18:17:57,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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 18:17:57,124 INFO L276 IsEmpty]: Start isEmpty. Operand 4467 states and 15257 transitions. [2022-03-01 18:17:57,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:17:57,130 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:57,130 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, 1, 1, 1, 1] [2022-03-01 18:17:57,146 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 18:17:57,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:57,343 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:57,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:57,344 INFO L85 PathProgramCache]: Analyzing trace with hash -173394005, now seen corresponding path program 11 times [2022-03-01 18:17:57,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:57,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045248509] [2022-03-01 18:17:57,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:57,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:57,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:57,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:57,686 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:57,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045248509] [2022-03-01 18:17:57,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045248509] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:57,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444041104] [2022-03-01 18:17:57,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:17:57,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:57,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:57,688 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 18:17:57,689 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 18:17:57,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:17:57,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:57,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:17:57,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:58,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:58,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:58,130 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 35 [2022-03-01 18:17:58,144 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-01 18:17:58,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 30 [2022-03-01 18:17:58,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:58,148 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 21 [2022-03-01 18:17:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:58,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:58,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:58,612 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:58,613 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 45 treesize of output 80 [2022-03-01 18:17:58,647 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:58,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-01 18:17:58,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:58,673 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:58,674 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 97 treesize of output 111 [2022-03-01 18:17:59,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:59,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:59,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:59,317 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 45 treesize of output 72 [2022-03-01 18:17:59,345 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:17:59,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-01 18:17:59,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:59,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:59,359 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:59,359 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 65 treesize of output 81 [2022-03-01 18:17:59,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:59,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444041104] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:59,771 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:59,771 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2022-03-01 18:17:59,771 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409965136] [2022-03-01 18:17:59,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:59,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 18:17:59,771 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:59,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 18:17:59,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:17:59,771 INFO L87 Difference]: Start difference. First operand 4467 states and 15257 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 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 18:18:09,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:09,930 INFO L93 Difference]: Finished difference Result 8893 states and 27493 transitions. [2022-03-01 18:18:09,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-03-01 18:18:09,930 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 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 18:18:09,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:09,946 INFO L225 Difference]: With dead ends: 8893 [2022-03-01 18:18:09,946 INFO L226 Difference]: Without dead ends: 8863 [2022-03-01 18:18:09,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7337 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=2593, Invalid=19163, Unknown=0, NotChecked=0, Total=21756 [2022-03-01 18:18:09,947 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 717 mSDsluCounter, 1963 mSDsCounter, 0 mSdLazyCounter, 4658 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 4905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 4658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:09,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [717 Valid, 976 Invalid, 4905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 4658 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-01 18:18:09,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8863 states. [2022-03-01 18:18:10,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8863 to 4476. [2022-03-01 18:18:10,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4476 states, 4475 states have (on average 3.4174301675977654) internal successors, (15293), 4475 states have internal predecessors, (15293), 0 states have call successors, (0), 0 states 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 18:18:10,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4476 states to 4476 states and 15293 transitions. [2022-03-01 18:18:10,047 INFO L78 Accepts]: Start accepts. Automaton has 4476 states and 15293 transitions. Word has length 30 [2022-03-01 18:18:10,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:10,047 INFO L470 AbstractCegarLoop]: Abstraction has 4476 states and 15293 transitions. [2022-03-01 18:18:10,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 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 18:18:10,047 INFO L276 IsEmpty]: Start isEmpty. Operand 4476 states and 15293 transitions. [2022-03-01 18:18:10,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:18:10,053 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:10,053 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, 1, 1, 1, 1] [2022-03-01 18:18:10,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-01 18:18:10,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-01 18:18:10,267 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:10,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:10,267 INFO L85 PathProgramCache]: Analyzing trace with hash -242471051, now seen corresponding path program 12 times [2022-03-01 18:18:10,267 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:10,267 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9855125] [2022-03-01 18:18:10,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:10,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:10,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:10,552 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:10,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9855125] [2022-03-01 18:18:10,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9855125] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:10,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163565342] [2022-03-01 18:18:10,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:18:10,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:10,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:10,553 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 18:18:10,554 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 18:18:10,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:18:10,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:10,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:18:10,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:12,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:12,562 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:12,563 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 48 treesize of output 56 [2022-03-01 18:18:12,579 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:12,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 40 treesize of output 64 [2022-03-01 18:18:12,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:12,591 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:12,591 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 67 treesize of output 71 [2022-03-01 18:18:12,819 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:12,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:13,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:13,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:13,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:13,251 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 84 treesize of output 101 [2022-03-01 18:18:13,281 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:13,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 68 treesize of output 111 [2022-03-01 18:18:13,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:13,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:13,302 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:13,302 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 91 treesize of output 99 [2022-03-01 18:18:14,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:14,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163565342] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:14,013 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:14,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-03-01 18:18:14,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315163223] [2022-03-01 18:18:14,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:14,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-01 18:18:14,014 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:14,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-01 18:18:14,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1117, Unknown=2, NotChecked=0, Total=1260 [2022-03-01 18:18:14,014 INFO L87 Difference]: Start difference. First operand 4476 states and 15293 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:42,456 WARN L228 SmtUtils]: Spent 5.40s on a formula simplification. DAG size of input: 124 DAG size of output: 97 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-01 18:19:18,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:18,889 INFO L93 Difference]: Finished difference Result 12251 states and 40954 transitions. [2022-03-01 18:19:18,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-03-01 18:19:18,890 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:19:18,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:18,922 INFO L225 Difference]: With dead ends: 12251 [2022-03-01 18:19:18,922 INFO L226 Difference]: Without dead ends: 12221 [2022-03-01 18:19:18,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10030 ImplicationChecksByTransitivity, 65.4s TimeCoverageRelationStatistics Valid=3306, Invalid=24063, Unknown=21, NotChecked=0, Total=27390 [2022-03-01 18:19:18,926 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 667 mSDsluCounter, 1863 mSDsCounter, 0 mSdLazyCounter, 2598 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 4887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 2598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2080 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:18,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [667 Valid, 879 Invalid, 4887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 2598 Invalid, 0 Unknown, 2080 Unchecked, 1.5s Time] [2022-03-01 18:19:18,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12221 states. [2022-03-01 18:19:19,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12221 to 4581. [2022-03-01 18:19:19,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4581 states, 4580 states have (on average 3.427292576419214) internal successors, (15697), 4580 states have internal predecessors, (15697), 0 states have call successors, (0), 0 states 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 18:19:19,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4581 states to 4581 states and 15697 transitions. [2022-03-01 18:19:19,180 INFO L78 Accepts]: Start accepts. Automaton has 4581 states and 15697 transitions. Word has length 30 [2022-03-01 18:19:19,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:19,180 INFO L470 AbstractCegarLoop]: Abstraction has 4581 states and 15697 transitions. [2022-03-01 18:19:19,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:19,181 INFO L276 IsEmpty]: Start isEmpty. Operand 4581 states and 15697 transitions. [2022-03-01 18:19:19,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:19:19,188 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:19,188 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, 1, 1, 1, 1] [2022-03-01 18:19:19,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-01 18:19:19,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:19,403 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:19,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:19,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1966576565, now seen corresponding path program 13 times [2022-03-01 18:19:19,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:19,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515723292] [2022-03-01 18:19:19,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:19,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:19,953 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:19,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515723292] [2022-03-01 18:19:19,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515723292] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:19,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107206383] [2022-03-01 18:19:19,954 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:19:19,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:19,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:19,955 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 18:19:19,975 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 18:19:20,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:20,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:19:20,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:20,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:20,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:20,517 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 47 treesize of output 39 [2022-03-01 18:19:20,531 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-01 18:19:20,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 39 treesize of output 34 [2022-03-01 18:19:20,534 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 16 [2022-03-01 18:19:20,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:20,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:20,955 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:19:20,956 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 46 treesize of output 81 [2022-03-01 18:19:20,988 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:19:20,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-01 18:19:20,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:21,027 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:19:21,028 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 97 treesize of output 111 [2022-03-01 18:19:22,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:22,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:22,955 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:19:22,956 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 45 treesize of output 72 [2022-03-01 18:19:23,004 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:19:23,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-01 18:19:23,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:23,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:23,027 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:19:23,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-01 18:19:23,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:23,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107206383] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:23,527 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:23,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 18:19:23,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424151147] [2022-03-01 18:19:23,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:23,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:19:23,527 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:23,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:19:23,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:19:23,528 INFO L87 Difference]: Start difference. First operand 4581 states and 15697 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 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 18:19:31,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:31,166 INFO L93 Difference]: Finished difference Result 9097 states and 29208 transitions. [2022-03-01 18:19:31,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-01 18:19:31,167 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 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 18:19:31,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:31,187 INFO L225 Difference]: With dead ends: 9097 [2022-03-01 18:19:31,188 INFO L226 Difference]: Without dead ends: 9063 [2022-03-01 18:19:31,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3651 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1440, Invalid=10116, Unknown=0, NotChecked=0, Total=11556 [2022-03-01 18:19:31,190 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 608 mSDsluCounter, 1365 mSDsCounter, 0 mSdLazyCounter, 3670 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 3884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 3670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:31,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 625 Invalid, 3884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 3670 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-01 18:19:31,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9063 states. [2022-03-01 18:19:31,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9063 to 4616. [2022-03-01 18:19:31,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4616 states, 4615 states have (on average 3.4238353196099673) internal successors, (15801), 4615 states have internal predecessors, (15801), 0 states have call successors, (0), 0 states 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 18:19:31,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4616 states to 4616 states and 15801 transitions. [2022-03-01 18:19:31,272 INFO L78 Accepts]: Start accepts. Automaton has 4616 states and 15801 transitions. Word has length 30 [2022-03-01 18:19:31,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:31,273 INFO L470 AbstractCegarLoop]: Abstraction has 4616 states and 15801 transitions. [2022-03-01 18:19:31,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 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 18:19:31,273 INFO L276 IsEmpty]: Start isEmpty. Operand 4616 states and 15801 transitions. [2022-03-01 18:19:31,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:19:31,291 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:31,291 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, 1, 1, 1, 1] [2022-03-01 18:19:31,312 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 18:19:31,507 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,SelfDestructingSolverStorable51 [2022-03-01 18:19:31,507 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:31,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:31,508 INFO L85 PathProgramCache]: Analyzing trace with hash 857420597, now seen corresponding path program 14 times [2022-03-01 18:19:31,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:31,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165163970] [2022-03-01 18:19:31,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:31,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:31,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:31,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:31,795 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:31,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165163970] [2022-03-01 18:19:31,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165163970] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:31,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324550885] [2022-03-01 18:19:31,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:19:31,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:31,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:31,796 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 18:19:31,797 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 18:19:31,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:19:31,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:31,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:19:31,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:32,148 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:19:32,149 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 58 [2022-03-01 18:19:32,183 INFO L353 Elim1Store]: treesize reduction 41, result has 55.9 percent of original size [2022-03-01 18:19:32,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 42 treesize of output 69 [2022-03-01 18:19:32,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:19:32,194 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 67 treesize of output 71 [2022-03-01 18:19:32,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:32,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:32,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:32,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:33,001 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:19:33,001 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 46 treesize of output 73 [2022-03-01 18:19:33,034 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:19:33,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-01 18:19:33,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:33,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:33,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:19:33,058 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 97 treesize of output 103 [2022-03-01 18:19:34,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:34,063 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 45 treesize of output 35 [2022-03-01 18:19:34,087 INFO L353 Elim1Store]: treesize reduction 65, result has 28.6 percent of original size [2022-03-01 18:19:34,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 35 [2022-03-01 18:19:34,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:34,090 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 17 treesize of output 11 [2022-03-01 18:19:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:34,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324550885] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:34,213 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:34,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 35 [2022-03-01 18:19:34,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583026079] [2022-03-01 18:19:34,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:34,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 18:19:34,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:34,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 18:19:34,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:19:34,214 INFO L87 Difference]: Start difference. First operand 4616 states and 15801 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:58,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:58,337 INFO L93 Difference]: Finished difference Result 11751 states and 37816 transitions. [2022-03-01 18:19:58,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-03-01 18:19:58,338 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:19:58,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:58,364 INFO L225 Difference]: With dead ends: 11751 [2022-03-01 18:19:58,364 INFO L226 Difference]: Without dead ends: 11698 [2022-03-01 18:19:58,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22128 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=7340, Invalid=46716, Unknown=0, NotChecked=0, Total=54056 [2022-03-01 18:19:58,377 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 1194 mSDsluCounter, 2913 mSDsCounter, 0 mSdLazyCounter, 5549 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1194 SdHoareTripleChecker+Valid, 1630 SdHoareTripleChecker+Invalid, 7484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 5549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1517 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:58,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1194 Valid, 1630 Invalid, 7484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 5549 Invalid, 0 Unknown, 1517 Unchecked, 3.7s Time] [2022-03-01 18:19:58,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11698 states. [2022-03-01 18:19:58,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11698 to 4650. [2022-03-01 18:19:58,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4650 states, 4649 states have (on average 3.4314906431490644) internal successors, (15953), 4649 states have internal predecessors, (15953), 0 states have call successors, (0), 0 states 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 18:19:58,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4650 states to 4650 states and 15953 transitions. [2022-03-01 18:19:58,544 INFO L78 Accepts]: Start accepts. Automaton has 4650 states and 15953 transitions. Word has length 30 [2022-03-01 18:19:58,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:58,545 INFO L470 AbstractCegarLoop]: Abstraction has 4650 states and 15953 transitions. [2022-03-01 18:19:58,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:58,545 INFO L276 IsEmpty]: Start isEmpty. Operand 4650 states and 15953 transitions. [2022-03-01 18:19:58,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:19:58,553 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:58,553 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, 1, 1, 1, 1] [2022-03-01 18:19:58,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-01 18:19:58,767 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,SelfDestructingSolverStorable52 [2022-03-01 18:19:58,767 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:58,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:58,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1825899231, now seen corresponding path program 15 times [2022-03-01 18:19:58,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:58,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308541127] [2022-03-01 18:19:58,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:58,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:59,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:59,163 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:59,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308541127] [2022-03-01 18:19:59,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308541127] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:59,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324650076] [2022-03-01 18:19:59,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:19:59,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:59,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:59,164 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 18:19:59,165 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 18:19:59,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:19:59,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:59,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:19:59,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:59,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:59,591 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:19:59,591 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 45 treesize of output 53 [2022-03-01 18:19:59,606 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:19:59,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 61 [2022-03-01 18:19:59,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:59,616 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:19:59,617 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 67 treesize of output 71 [2022-03-01 18:19:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:59,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:03,158 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:20:03,158 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 84 treesize of output 117 [2022-03-01 18:20:03,190 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:20:03,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 68 treesize of output 111 [2022-03-01 18:20:03,218 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:20:03,218 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 91 treesize of output 115 [2022-03-01 18:20:11,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:11,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324650076] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:11,758 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:11,758 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-03-01 18:20:11,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234293157] [2022-03-01 18:20:11,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:11,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:20:11,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:11,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:20:11,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=711, Unknown=2, NotChecked=0, Total=870 [2022-03-01 18:20:11,759 INFO L87 Difference]: Start difference. First operand 4650 states and 15953 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 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 18:21:05,071 WARN L228 SmtUtils]: Spent 40.04s on a formula simplification. DAG size of input: 62 DAG size of output: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-01 18:21:21,422 WARN L228 SmtUtils]: Spent 13.11s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-01 18:21:30,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:30,408 INFO L93 Difference]: Finished difference Result 9083 states and 28913 transitions. [2022-03-01 18:21:30,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-01 18:21:30,408 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 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 18:21:30,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:30,424 INFO L225 Difference]: With dead ends: 9083 [2022-03-01 18:21:30,424 INFO L226 Difference]: Without dead ends: 9038 [2022-03-01 18:21:30,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4912 ImplicationChecksByTransitivity, 81.1s TimeCoverageRelationStatistics Valid=2289, Invalid=10127, Unknown=16, NotChecked=0, Total=12432 [2022-03-01 18:21:30,425 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 608 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 1430 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 3001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 1430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1306 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:30,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 448 Invalid, 3001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 1430 Invalid, 0 Unknown, 1306 Unchecked, 0.9s Time] [2022-03-01 18:21:30,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9038 states. [2022-03-01 18:21:30,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9038 to 4652. [2022-03-01 18:21:30,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4652 states, 4651 states have (on average 3.431950118254139) internal successors, (15962), 4651 states have internal predecessors, (15962), 0 states have call successors, (0), 0 states 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 18:21:30,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4652 states to 4652 states and 15962 transitions. [2022-03-01 18:21:30,515 INFO L78 Accepts]: Start accepts. Automaton has 4652 states and 15962 transitions. Word has length 30 [2022-03-01 18:21:30,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:30,515 INFO L470 AbstractCegarLoop]: Abstraction has 4652 states and 15962 transitions. [2022-03-01 18:21:30,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 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 18:21:30,515 INFO L276 IsEmpty]: Start isEmpty. Operand 4652 states and 15962 transitions. [2022-03-01 18:21:30,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:21:30,521 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:30,521 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, 1, 1, 1, 1] [2022-03-01 18:21:30,537 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 18:21:30,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:30,736 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:21:30,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:30,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1512143957, now seen corresponding path program 16 times [2022-03-01 18:21:30,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:30,737 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518605708] [2022-03-01 18:21:30,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:30,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:30,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:31,043 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:31,043 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:31,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518605708] [2022-03-01 18:21:31,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518605708] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:31,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706142455] [2022-03-01 18:21:31,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:21:31,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:31,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:31,051 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 18:21:31,052 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 18:21:31,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:21:31,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:31,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:21:31,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:31,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:31,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:31,436 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 45 treesize of output 37 [2022-03-01 18:21:31,450 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-01 18:21:31,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 32 [2022-03-01 18:21:31,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:31,453 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 16 [2022-03-01 18:21:31,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:31,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:31,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:31,747 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:31,748 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-03-01 18:21:31,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:31,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-01 18:21:31,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:31,803 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:31,803 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 97 treesize of output 111 [2022-03-01 18:21:33,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:33,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:33,632 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:33,633 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 45 treesize of output 72 [2022-03-01 18:21:33,681 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:21:33,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-01 18:21:33,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:33,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:33,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:33,707 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 65 treesize of output 81 [2022-03-01 18:21:34,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:34,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706142455] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:34,160 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:34,160 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-03-01 18:21:34,160 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12056584] [2022-03-01 18:21:34,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:34,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:21:34,160 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:34,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:21:34,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:21:34,161 INFO L87 Difference]: Start difference. First operand 4652 states and 15962 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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 18:21:38,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:38,873 INFO L93 Difference]: Finished difference Result 10341 states and 31975 transitions. [2022-03-01 18:21:38,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-01 18:21:38,873 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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 18:21:38,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:38,893 INFO L225 Difference]: With dead ends: 10341 [2022-03-01 18:21:38,893 INFO L226 Difference]: Without dead ends: 10311 [2022-03-01 18:21:38,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3890 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2146, Invalid=8566, Unknown=0, NotChecked=0, Total=10712 [2022-03-01 18:21:38,894 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 868 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 2079 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 2364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 2079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:38,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [868 Valid, 460 Invalid, 2364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 2079 Invalid, 0 Unknown, 33 Unchecked, 1.1s Time] [2022-03-01 18:21:38,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10311 states. [2022-03-01 18:21:38,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10311 to 4677. [2022-03-01 18:21:38,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4677 states, 4676 states have (on average 3.4362703165098374) internal successors, (16068), 4676 states have internal predecessors, (16068), 0 states have call successors, (0), 0 states 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 18:21:39,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4677 states to 4677 states and 16068 transitions. [2022-03-01 18:21:39,008 INFO L78 Accepts]: Start accepts. Automaton has 4677 states and 16068 transitions. Word has length 30 [2022-03-01 18:21:39,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:39,008 INFO L470 AbstractCegarLoop]: Abstraction has 4677 states and 16068 transitions. [2022-03-01 18:21:39,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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 18:21:39,008 INFO L276 IsEmpty]: Start isEmpty. Operand 4677 states and 16068 transitions. [2022-03-01 18:21:39,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:21:39,015 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:39,015 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, 1, 1, 1, 1] [2022-03-01 18:21:39,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-01 18:21:39,222 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,SelfDestructingSolverStorable54 [2022-03-01 18:21:39,222 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:21:39,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:39,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1089229415, now seen corresponding path program 17 times [2022-03-01 18:21:39,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:39,223 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882411102] [2022-03-01 18:21:39,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:39,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:39,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:39,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:39,494 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:39,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882411102] [2022-03-01 18:21:39,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882411102] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:39,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994278873] [2022-03-01 18:21:39,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:21:39,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:39,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:39,496 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 18:21:39,497 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 18:21:39,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:21:39,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:39,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:21:39,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:39,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:39,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:39,816 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 45 treesize of output 37 [2022-03-01 18:21:39,825 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-01 18:21:39,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 32 [2022-03-01 18:21:39,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:39,828 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 16 [2022-03-01 18:21:39,850 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:39,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:40,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:40,112 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:40,112 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 46 treesize of output 81 [2022-03-01 18:21:40,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:40,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-01 18:21:40,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:40,152 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:40,152 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 97 treesize of output 111 [2022-03-01 18:21:41,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:41,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:41,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:41,517 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 45 treesize of output 72 [2022-03-01 18:21:41,562 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:21:41,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-01 18:21:41,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:41,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:41,583 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:41,583 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 65 treesize of output 81 [2022-03-01 18:21:41,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:41,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994278873] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:41,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:41,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-03-01 18:21:41,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621157119] [2022-03-01 18:21:41,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:41,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 18:21:41,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:41,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 18:21:41,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:21:41,927 INFO L87 Difference]: Start difference. First operand 4677 states and 16068 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 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 18:21:51,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:51,285 INFO L93 Difference]: Finished difference Result 12615 states and 38355 transitions. [2022-03-01 18:21:51,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-03-01 18:21:51,285 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 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 18:21:51,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:51,310 INFO L225 Difference]: With dead ends: 12615 [2022-03-01 18:21:51,311 INFO L226 Difference]: Without dead ends: 12585 [2022-03-01 18:21:51,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11900 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=4342, Invalid=23714, Unknown=0, NotChecked=0, Total=28056 [2022-03-01 18:21:51,312 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 778 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 2662 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 3901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 2662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1027 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:51,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [778 Valid, 787 Invalid, 3901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 2662 Invalid, 0 Unknown, 1027 Unchecked, 1.4s Time] [2022-03-01 18:21:51,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12585 states. [2022-03-01 18:21:51,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12585 to 4679. [2022-03-01 18:21:51,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4679 states, 4678 states have (on average 3.436725096194955) internal successors, (16077), 4678 states have internal predecessors, (16077), 0 states have call successors, (0), 0 states 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 18:21:51,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4679 states to 4679 states and 16077 transitions. [2022-03-01 18:21:51,455 INFO L78 Accepts]: Start accepts. Automaton has 4679 states and 16077 transitions. Word has length 30 [2022-03-01 18:21:51,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:51,455 INFO L470 AbstractCegarLoop]: Abstraction has 4679 states and 16077 transitions. [2022-03-01 18:21:51,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 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 18:21:51,455 INFO L276 IsEmpty]: Start isEmpty. Operand 4679 states and 16077 transitions. [2022-03-01 18:21:51,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:21:51,461 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:51,462 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, 1, 1, 1, 1] [2022-03-01 18:21:51,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-01 18:21:51,677 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,SelfDestructingSolverStorable55 [2022-03-01 18:21:51,677 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:21:51,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:51,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1400189745, now seen corresponding path program 18 times [2022-03-01 18:21:51,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:51,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969095702] [2022-03-01 18:21:51,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:51,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:51,951 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:51,952 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:51,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969095702] [2022-03-01 18:21:51,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969095702] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:51,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562813268] [2022-03-01 18:21:51,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:21:51,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:51,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:51,976 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 18:21:51,997 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 18:21:52,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:21:52,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:52,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:21:52,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:52,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:52,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:52,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:52,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:52,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:52,345 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:52,345 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 51 [2022-03-01 18:21:52,368 INFO L353 Elim1Store]: treesize reduction 45, result has 57.1 percent of original size [2022-03-01 18:21:52,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 41 treesize of output 72 [2022-03-01 18:21:52,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:52,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:52,374 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:52,375 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 75 treesize of output 65 [2022-03-01 18:21:52,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:52,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:52,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:52,654 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:52,655 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 46 treesize of output 81 [2022-03-01 18:21:52,677 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:52,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-01 18:21:52,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:52,693 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:52,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-01 18:21:54,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:54,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:54,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:54,509 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 45 treesize of output 72 [2022-03-01 18:21:54,556 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:21:54,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-01 18:21:54,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:54,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:54,580 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:54,580 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 65 treesize of output 81 [2022-03-01 18:21:55,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:55,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562813268] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:55,075 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:55,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-03-01 18:21:55,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919180183] [2022-03-01 18:21:55,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:55,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:21:55,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:55,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:21:55,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:21:55,075 INFO L87 Difference]: Start difference. First operand 4679 states and 16077 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 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 18:21:59,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:59,901 INFO L93 Difference]: Finished difference Result 11343 states and 35448 transitions. [2022-03-01 18:21:59,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-01 18:21:59,901 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 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 18:21:59,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:59,925 INFO L225 Difference]: With dead ends: 11343 [2022-03-01 18:21:59,925 INFO L226 Difference]: Without dead ends: 11313 [2022-03-01 18:21:59,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5087 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2546, Invalid=10336, Unknown=0, NotChecked=0, Total=12882 [2022-03-01 18:21:59,926 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 898 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 2390 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 898 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 3425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 2390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 713 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:59,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [898 Valid, 536 Invalid, 3425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 2390 Invalid, 0 Unknown, 713 Unchecked, 1.2s Time] [2022-03-01 18:21:59,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11313 states. [2022-03-01 18:22:00,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11313 to 4691. [2022-03-01 18:22:00,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4691 states, 4690 states have (on average 3.438592750533049) internal successors, (16127), 4690 states have internal predecessors, (16127), 0 states have call successors, (0), 0 states 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 18:22:00,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4691 states to 4691 states and 16127 transitions. [2022-03-01 18:22:00,048 INFO L78 Accepts]: Start accepts. Automaton has 4691 states and 16127 transitions. Word has length 30 [2022-03-01 18:22:00,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:22:00,048 INFO L470 AbstractCegarLoop]: Abstraction has 4691 states and 16127 transitions. [2022-03-01 18:22:00,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 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 18:22:00,048 INFO L276 IsEmpty]: Start isEmpty. Operand 4691 states and 16127 transitions. [2022-03-01 18:22:00,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:22:00,055 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:22:00,055 INFO L514 BasicCegarLoop]: trace histogram [2, 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 18:22:00,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-01 18:22:00,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:00,264 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:22:00,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:22:00,264 INFO L85 PathProgramCache]: Analyzing trace with hash -2132440842, now seen corresponding path program 37 times [2022-03-01 18:22:00,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:22:00,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626861861] [2022-03-01 18:22:00,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:22:00,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:22:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:00,734 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 18:22:00,734 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:22:00,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626861861] [2022-03-01 18:22:00,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626861861] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:22:00,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556683369] [2022-03-01 18:22:00,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:22:00,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:00,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:22:00,736 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 18:22:00,737 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 18:22:00,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:00,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:22:00,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:22:01,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:01,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:01,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:01,144 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 54 treesize of output 44 [2022-03-01 18:22:01,163 INFO L353 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2022-03-01 18:22:01,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 44 treesize of output 40 [2022-03-01 18:22:01,166 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 16 [2022-03-01 18:22:01,197 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 18:22:01,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:01,425 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:22:01,426 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 49 treesize of output 74 [2022-03-01 18:22:01,448 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:01,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 112 [2022-03-01 18:22:01,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:01,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:01,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:01,463 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 103 treesize of output 107 [2022-03-01 18:22:01,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:01,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:01,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:01,916 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 38 [2022-03-01 18:22:01,952 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-03-01 18:22:01,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 38 treesize of output 36 [2022-03-01 18:22:01,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:01,956 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 17 treesize of output 11 [2022-03-01 18:22:02,073 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 18:22:02,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556683369] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:22:02,073 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:22:02,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-03-01 18:22:02,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282015925] [2022-03-01 18:22:02,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:22:02,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:22:02,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:22:02,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:22:02,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:22:02,074 INFO L87 Difference]: Start difference. First operand 4691 states and 16127 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:08,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:22:08,121 INFO L93 Difference]: Finished difference Result 8272 states and 27313 transitions. [2022-03-01 18:22:08,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-01 18:22:08,121 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:22:08,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:22:08,137 INFO L225 Difference]: With dead ends: 8272 [2022-03-01 18:22:08,138 INFO L226 Difference]: Without dead ends: 8225 [2022-03-01 18:22:08,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3582 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1591, Invalid=9539, Unknown=0, NotChecked=0, Total=11130 [2022-03-01 18:22:08,139 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 556 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 2975 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 3352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 2975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:22:08,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [556 Valid, 533 Invalid, 3352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 2975 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-01 18:22:08,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8225 states. [2022-03-01 18:22:08,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8225 to 4688. [2022-03-01 18:22:08,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4688 states, 4687 states have (on average 3.4384467676552166) internal successors, (16116), 4687 states have internal predecessors, (16116), 0 states have call successors, (0), 0 states 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 18:22:08,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4688 states to 4688 states and 16116 transitions. [2022-03-01 18:22:08,229 INFO L78 Accepts]: Start accepts. Automaton has 4688 states and 16116 transitions. Word has length 30 [2022-03-01 18:22:08,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:22:08,230 INFO L470 AbstractCegarLoop]: Abstraction has 4688 states and 16116 transitions. [2022-03-01 18:22:08,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:08,230 INFO L276 IsEmpty]: Start isEmpty. Operand 4688 states and 16116 transitions. [2022-03-01 18:22:08,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:22:08,236 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:22:08,236 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, 1, 1, 1, 1] [2022-03-01 18:22:08,254 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 18:22:08,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:08,452 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:22:08,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:22:08,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1956652829, now seen corresponding path program 19 times [2022-03-01 18:22:08,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:22:08,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808369234] [2022-03-01 18:22:08,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:22:08,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:22:08,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:08,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:08,725 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:22:08,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808369234] [2022-03-01 18:22:08,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808369234] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:22:08,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980553491] [2022-03-01 18:22:08,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:22:08,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:08,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:22:08,736 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 18:22:08,737 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 18:22:08,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:08,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:22:08,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:22:09,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:09,050 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:09,050 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 48 treesize of output 48 [2022-03-01 18:22:09,061 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:09,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 40 treesize of output 64 [2022-03-01 18:22:09,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:09,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:09,066 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 67 treesize of output 63 [2022-03-01 18:22:09,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:09,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:09,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:09,375 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:09,376 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 46 treesize of output 81 [2022-03-01 18:22:09,398 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:09,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-01 18:22:09,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:09,417 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:09,417 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 97 treesize of output 111 [2022-03-01 18:22:10,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:10,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:10,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:10,124 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 45 treesize of output 72 [2022-03-01 18:22:10,155 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:22:10,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-01 18:22:10,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:10,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:10,172 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:10,172 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 65 treesize of output 81 [2022-03-01 18:22:10,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:10,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980553491] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:22:10,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:22:10,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-03-01 18:22:10,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574872685] [2022-03-01 18:22:10,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:22:10,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:22:10,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:22:10,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:22:10,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:22:10,451 INFO L87 Difference]: Start difference. First operand 4688 states and 16116 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 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 18:22:16,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:22:16,488 INFO L93 Difference]: Finished difference Result 11545 states and 35977 transitions. [2022-03-01 18:22:16,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-01 18:22:16,488 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 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 18:22:16,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:22:16,509 INFO L225 Difference]: With dead ends: 11545 [2022-03-01 18:22:16,509 INFO L226 Difference]: Without dead ends: 11530 [2022-03-01 18:22:16,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5815 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2831, Invalid=12421, Unknown=0, NotChecked=0, Total=15252 [2022-03-01 18:22:16,510 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 991 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 2645 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 991 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 3529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 2645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 532 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:22:16,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [991 Valid, 581 Invalid, 3529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 2645 Invalid, 0 Unknown, 532 Unchecked, 1.4s Time] [2022-03-01 18:22:16,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11530 states. [2022-03-01 18:22:16,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11530 to 4686. [2022-03-01 18:22:16,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4686 states, 4685 states have (on average 3.437993596584845) internal successors, (16107), 4685 states have internal predecessors, (16107), 0 states have call successors, (0), 0 states 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 18:22:16,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4686 states to 4686 states and 16107 transitions. [2022-03-01 18:22:16,618 INFO L78 Accepts]: Start accepts. Automaton has 4686 states and 16107 transitions. Word has length 30 [2022-03-01 18:22:16,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:22:16,618 INFO L470 AbstractCegarLoop]: Abstraction has 4686 states and 16107 transitions. [2022-03-01 18:22:16,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 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 18:22:16,618 INFO L276 IsEmpty]: Start isEmpty. Operand 4686 states and 16107 transitions. [2022-03-01 18:22:16,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:22:16,625 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:22:16,625 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, 1, 1, 1, 1] [2022-03-01 18:22:16,642 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 18:22:16,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:16,840 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:22:16,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:22:16,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1686862121, now seen corresponding path program 20 times [2022-03-01 18:22:16,841 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:22:16,841 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268244230] [2022-03-01 18:22:16,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:22:16,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:22:16,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:17,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:17,166 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:22:17,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268244230] [2022-03-01 18:22:17,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268244230] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:22:17,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296877173] [2022-03-01 18:22:17,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:22:17,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:17,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:22:17,168 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 18:22:17,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:22:17,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:22:17,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:22:17,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:22:17,191 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 18:22:17,439 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:17,440 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-03-01 18:22:17,465 INFO L353 Elim1Store]: treesize reduction 41, result has 55.9 percent of original size [2022-03-01 18:22:17,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 62 [2022-03-01 18:22:17,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:17,474 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 71 [2022-03-01 18:22:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:17,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:18,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:18,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:18,009 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:18,009 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 46 treesize of output 73 [2022-03-01 18:22:18,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:18,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-01 18:22:18,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:18,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:18,045 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:18,045 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 97 treesize of output 103 [2022-03-01 18:22:18,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:18,614 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 45 treesize of output 35 [2022-03-01 18:22:18,629 INFO L353 Elim1Store]: treesize reduction 67, result has 26.4 percent of original size [2022-03-01 18:22:18,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 33 [2022-03-01 18:22:18,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:18,631 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 15 treesize of output 11 [2022-03-01 18:22:18,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:18,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296877173] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:22:18,713 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:22:18,713 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 35 [2022-03-01 18:22:18,713 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194055179] [2022-03-01 18:22:18,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:22:18,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 18:22:18,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:22:18,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 18:22:18,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:22:18,714 INFO L87 Difference]: Start difference. First operand 4686 states and 16107 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:35,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:22:35,566 INFO L93 Difference]: Finished difference Result 10991 states and 35565 transitions. [2022-03-01 18:22:35,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2022-03-01 18:22:35,567 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:22:35,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:22:35,586 INFO L225 Difference]: With dead ends: 10991 [2022-03-01 18:22:35,586 INFO L226 Difference]: Without dead ends: 10917 [2022-03-01 18:22:35,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22062 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=6063, Invalid=48927, Unknown=0, NotChecked=0, Total=54990 [2022-03-01 18:22:35,588 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 1087 mSDsluCounter, 2835 mSDsCounter, 0 mSdLazyCounter, 5397 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1087 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 7353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 5397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1551 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:22:35,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1087 Valid, 1626 Invalid, 7353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 5397 Invalid, 0 Unknown, 1551 Unchecked, 2.7s Time] [2022-03-01 18:22:35,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10917 states. [2022-03-01 18:22:35,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10917 to 4709. [2022-03-01 18:22:35,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4709 states, 4708 states have (on average 3.441163976210705) internal successors, (16201), 4708 states have internal predecessors, (16201), 0 states have call successors, (0), 0 states 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 18:22:35,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4709 states to 4709 states and 16201 transitions. [2022-03-01 18:22:35,696 INFO L78 Accepts]: Start accepts. Automaton has 4709 states and 16201 transitions. Word has length 30 [2022-03-01 18:22:35,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:22:35,696 INFO L470 AbstractCegarLoop]: Abstraction has 4709 states and 16201 transitions. [2022-03-01 18:22:35,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:35,696 INFO L276 IsEmpty]: Start isEmpty. Operand 4709 states and 16201 transitions. [2022-03-01 18:22:35,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:22:35,702 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:22:35,702 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, 1, 1, 1, 1] [2022-03-01 18:22:35,718 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 18:22:35,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-01 18:22:35,917 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:22:35,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:22:35,918 INFO L85 PathProgramCache]: Analyzing trace with hash -738691041, now seen corresponding path program 21 times [2022-03-01 18:22:35,918 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:22:35,918 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980779644] [2022-03-01 18:22:35,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:22:35,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:22:35,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:36,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:36,176 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:22:36,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980779644] [2022-03-01 18:22:36,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980779644] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:22:36,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704238322] [2022-03-01 18:22:36,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:22:36,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:36,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:22:36,177 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 18:22:36,178 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 18:22:36,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:22:36,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:22:36,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:22:36,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:22:36,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:36,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:36,536 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 48 treesize of output 40 [2022-03-01 18:22:36,546 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-01 18:22:36,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 40 treesize of output 35 [2022-03-01 18:22:36,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:36,548 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 16 [2022-03-01 18:22:36,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:36,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:38,212 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:38,212 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 83 treesize of output 116 [2022-03-01 18:22:38,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:38,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 67 treesize of output 110 [2022-03-01 18:22:38,279 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:38,280 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 91 treesize of output 115 [2022-03-01 18:22:42,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:42,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704238322] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:22:42,610 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:22:42,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-03-01 18:22:42,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334458961] [2022-03-01 18:22:42,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:22:42,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:22:42,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:22:42,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:22:42,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=788, Unknown=1, NotChecked=0, Total=930 [2022-03-01 18:22:42,611 INFO L87 Difference]: Start difference. First operand 4709 states and 16201 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 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 18:22:59,329 WARN L228 SmtUtils]: Spent 10.65s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-01 18:23:01,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:01,295 INFO L93 Difference]: Finished difference Result 8812 states and 27942 transitions. [2022-03-01 18:23:01,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-01 18:23:01,295 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 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 18:23:01,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:01,310 INFO L225 Difference]: With dead ends: 8812 [2022-03-01 18:23:01,311 INFO L226 Difference]: Without dead ends: 8755 [2022-03-01 18:23:01,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 46 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2830 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=1275, Invalid=6730, Unknown=5, NotChecked=0, Total=8010 [2022-03-01 18:23:01,311 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 439 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 1937 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 3035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 946 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:01,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 377 Invalid, 3035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1937 Invalid, 0 Unknown, 946 Unchecked, 1.0s Time] [2022-03-01 18:23:01,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8755 states. [2022-03-01 18:23:01,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8755 to 4731. [2022-03-01 18:23:01,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4731 states, 4730 states have (on average 3.441860465116279) internal successors, (16280), 4730 states have internal predecessors, (16280), 0 states have call successors, (0), 0 states 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 18:23:01,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4731 states to 4731 states and 16280 transitions. [2022-03-01 18:23:01,398 INFO L78 Accepts]: Start accepts. Automaton has 4731 states and 16280 transitions. Word has length 30 [2022-03-01 18:23:01,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:01,399 INFO L470 AbstractCegarLoop]: Abstraction has 4731 states and 16280 transitions. [2022-03-01 18:23:01,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 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 18:23:01,399 INFO L276 IsEmpty]: Start isEmpty. Operand 4731 states and 16280 transitions. [2022-03-01 18:23:01,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:23:01,405 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:01,406 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, 1, 1, 1, 1] [2022-03-01 18:23:01,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-01 18:23:01,619 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,SelfDestructingSolverStorable60 [2022-03-01 18:23:01,620 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:23:01,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:01,620 INFO L85 PathProgramCache]: Analyzing trace with hash -822012935, now seen corresponding path program 22 times [2022-03-01 18:23:01,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:01,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149123810] [2022-03-01 18:23:01,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:01,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:01,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:01,885 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:01,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149123810] [2022-03-01 18:23:01,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149123810] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:01,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436952277] [2022-03-01 18:23:01,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:23:01,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:01,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:01,886 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 18:23:01,887 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 18:23:01,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:23:01,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:01,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:23:01,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:02,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:02,147 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:02,147 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 43 treesize of output 43 [2022-03-01 18:23:02,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:02,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 59 [2022-03-01 18:23:02,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:02,162 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:02,162 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 67 treesize of output 63 [2022-03-01 18:23:02,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:02,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:02,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:02,406 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:02,406 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 45 treesize of output 80 [2022-03-01 18:23:02,427 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:02,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-01 18:23:02,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:02,444 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:02,444 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-01 18:23:03,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:03,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:03,314 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:03,314 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 45 treesize of output 72 [2022-03-01 18:23:03,358 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:23:03,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-01 18:23:03,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:03,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:03,374 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:03,375 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 65 treesize of output 81 [2022-03-01 18:23:03,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:03,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436952277] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:03,656 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:03,656 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-01 18:23:03,656 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507796293] [2022-03-01 18:23:03,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:03,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:23:03,657 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:03,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:23:03,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:23:03,657 INFO L87 Difference]: Start difference. First operand 4731 states and 16280 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:09,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:09,829 INFO L93 Difference]: Finished difference Result 9934 states and 31252 transitions. [2022-03-01 18:23:09,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-03-01 18:23:09,830 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:23:09,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:09,850 INFO L225 Difference]: With dead ends: 9934 [2022-03-01 18:23:09,850 INFO L226 Difference]: Without dead ends: 9833 [2022-03-01 18:23:09,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6182 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2456, Invalid=14314, Unknown=0, NotChecked=0, Total=16770 [2022-03-01 18:23:09,852 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 582 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 3056 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 3292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 3056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:09,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 555 Invalid, 3292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 3056 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-01 18:23:09,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9833 states. [2022-03-01 18:23:09,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9833 to 4765. [2022-03-01 18:23:09,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4765 states, 4764 states have (on average 3.445424013434089) internal successors, (16414), 4764 states have internal predecessors, (16414), 0 states have call successors, (0), 0 states 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 18:23:09,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4765 states to 4765 states and 16414 transitions. [2022-03-01 18:23:09,985 INFO L78 Accepts]: Start accepts. Automaton has 4765 states and 16414 transitions. Word has length 30 [2022-03-01 18:23:09,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:09,985 INFO L470 AbstractCegarLoop]: Abstraction has 4765 states and 16414 transitions. [2022-03-01 18:23:09,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:09,986 INFO L276 IsEmpty]: Start isEmpty. Operand 4765 states and 16414 transitions. [2022-03-01 18:23:09,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:23:09,993 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:09,993 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, 1, 1, 1, 1] [2022-03-01 18:23:10,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-01 18:23:10,211 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,SelfDestructingSolverStorable61 [2022-03-01 18:23:10,211 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:23:10,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:10,212 INFO L85 PathProgramCache]: Analyzing trace with hash -460915169, now seen corresponding path program 23 times [2022-03-01 18:23:10,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:10,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061064042] [2022-03-01 18:23:10,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:10,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:10,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:10,591 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:10,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061064042] [2022-03-01 18:23:10,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061064042] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:10,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378604105] [2022-03-01 18:23:10,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:23:10,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:10,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:10,595 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 18:23:10,596 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 18:23:10,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:23:10,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:10,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:23:10,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:10,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:10,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:10,911 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:10,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 56 [2022-03-01 18:23:10,927 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:10,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 48 treesize of output 72 [2022-03-01 18:23:10,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:10,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:10,936 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:10,936 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 79 treesize of output 71 [2022-03-01 18:23:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:11,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:11,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:11,300 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:11,300 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-03-01 18:23:11,322 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:11,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-01 18:23:11,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:11,339 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:11,340 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 97 treesize of output 111 [2022-03-01 18:23:12,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:12,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:12,136 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:12,136 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 45 treesize of output 72 [2022-03-01 18:23:12,173 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:23:12,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-01 18:23:12,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:12,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:12,190 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:12,190 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 65 treesize of output 81 [2022-03-01 18:23:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:12,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378604105] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:12,475 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:12,475 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 33 [2022-03-01 18:23:12,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193701558] [2022-03-01 18:23:12,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:12,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 18:23:12,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:12,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 18:23:12,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:23:12,475 INFO L87 Difference]: Start difference. First operand 4765 states and 16414 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 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 18:23:18,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:18,553 INFO L93 Difference]: Finished difference Result 9074 states and 28716 transitions. [2022-03-01 18:23:18,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-01 18:23:18,553 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 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 18:23:18,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:18,570 INFO L225 Difference]: With dead ends: 9074 [2022-03-01 18:23:18,571 INFO L226 Difference]: Without dead ends: 8918 [2022-03-01 18:23:18,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3706 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1685, Invalid=10525, Unknown=0, NotChecked=0, Total=12210 [2022-03-01 18:23:18,572 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 540 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 2939 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 3132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 2939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:18,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 619 Invalid, 3132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 2939 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-01 18:23:18,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8918 states. [2022-03-01 18:23:18,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8918 to 4772. [2022-03-01 18:23:18,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4772 states, 4771 states have (on average 3.446028086355062) internal successors, (16441), 4771 states have internal predecessors, (16441), 0 states have call successors, (0), 0 states 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 18:23:18,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4772 states to 4772 states and 16441 transitions. [2022-03-01 18:23:18,703 INFO L78 Accepts]: Start accepts. Automaton has 4772 states and 16441 transitions. Word has length 30 [2022-03-01 18:23:18,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:18,704 INFO L470 AbstractCegarLoop]: Abstraction has 4772 states and 16441 transitions. [2022-03-01 18:23:18,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 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 18:23:18,704 INFO L276 IsEmpty]: Start isEmpty. Operand 4772 states and 16441 transitions. [2022-03-01 18:23:18,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:23:18,710 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:18,710 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, 1, 1, 1, 1] [2022-03-01 18:23:18,728 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 18:23:18,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:18,924 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:23:18,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:18,924 INFO L85 PathProgramCache]: Analyzing trace with hash 791616355, now seen corresponding path program 24 times [2022-03-01 18:23:18,925 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:18,925 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801936549] [2022-03-01 18:23:18,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:18,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:18,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:19,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:19,255 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:19,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801936549] [2022-03-01 18:23:19,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801936549] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:19,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690883670] [2022-03-01 18:23:19,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:23:19,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:19,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:19,257 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 18:23:19,257 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 18:23:19,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:23:19,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:19,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:23:19,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:19,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:19,470 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:19,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2022-03-01 18:23:19,491 INFO L353 Elim1Store]: treesize reduction 41, result has 55.9 percent of original size [2022-03-01 18:23:19,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 64 [2022-03-01 18:23:19,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:19,496 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:19,496 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 67 treesize of output 63 [2022-03-01 18:23:19,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:19,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:19,840 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:23:19,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 81 [2022-03-01 18:23:19,862 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:19,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-01 18:23:19,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:19,880 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:19,880 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 97 treesize of output 111 [2022-03-01 18:23:21,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:21,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:21,195 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:21,196 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 45 treesize of output 72 [2022-03-01 18:23:21,233 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:23:21,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-01 18:23:21,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:21,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:21,272 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:21,273 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 65 treesize of output 81 [2022-03-01 18:23:21,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:21,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690883670] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:21,470 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:21,470 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 18:23:21,470 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726162041] [2022-03-01 18:23:21,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:21,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:23:21,470 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:21,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:23:21,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:23:21,471 INFO L87 Difference]: Start difference. First operand 4772 states and 16441 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 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 18:23:25,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:25,685 INFO L93 Difference]: Finished difference Result 9686 states and 31179 transitions. [2022-03-01 18:23:25,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-01 18:23:25,685 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 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 18:23:25,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:25,705 INFO L225 Difference]: With dead ends: 9686 [2022-03-01 18:23:25,705 INFO L226 Difference]: Without dead ends: 9568 [2022-03-01 18:23:25,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3380 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1210, Invalid=9296, Unknown=0, NotChecked=0, Total=10506 [2022-03-01 18:23:25,706 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 559 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 3024 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 3186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 3024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:25,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 580 Invalid, 3186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 3024 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-01 18:23:25,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9568 states. [2022-03-01 18:23:25,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9568 to 4803. [2022-03-01 18:23:25,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 4802 states have (on average 3.4448146605581007) internal successors, (16542), 4802 states have internal predecessors, (16542), 0 states have call successors, (0), 0 states 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 18:23:25,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 16542 transitions. [2022-03-01 18:23:25,812 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 16542 transitions. Word has length 30 [2022-03-01 18:23:25,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:25,813 INFO L470 AbstractCegarLoop]: Abstraction has 4803 states and 16542 transitions. [2022-03-01 18:23:25,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 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 18:23:25,813 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 16542 transitions. [2022-03-01 18:23:25,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:23:25,819 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:25,819 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, 1, 1, 1, 1] [2022-03-01 18:23:25,836 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 18:23:26,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:26,035 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:23:26,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:26,035 INFO L85 PathProgramCache]: Analyzing trace with hash 784192023, now seen corresponding path program 25 times [2022-03-01 18:23:26,035 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:26,035 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740838596] [2022-03-01 18:23:26,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:26,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:26,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:26,383 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:26,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740838596] [2022-03-01 18:23:26,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740838596] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:26,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136904830] [2022-03-01 18:23:26,384 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:23:26,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:26,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:26,385 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 18:23:26,385 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 18:23:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:26,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:23:26,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:26,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:26,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:26,776 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 48 treesize of output 40 [2022-03-01 18:23:26,791 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-01 18:23:26,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 40 treesize of output 35 [2022-03-01 18:23:26,793 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 16 [2022-03-01 18:23:26,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:26,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:27,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:27,104 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:27,104 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 46 treesize of output 81 [2022-03-01 18:23:27,128 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:27,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-01 18:23:27,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:27,147 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:27,147 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 97 treesize of output 111 [2022-03-01 18:23:28,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:28,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:28,416 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:28,416 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 45 treesize of output 72 [2022-03-01 18:23:28,450 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:23:28,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-01 18:23:28,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:28,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:28,467 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:28,468 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 65 treesize of output 81 [2022-03-01 18:23:28,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:28,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136904830] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:28,784 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:28,784 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-03-01 18:23:28,784 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035068301] [2022-03-01 18:23:28,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:28,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:23:28,785 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:28,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:23:28,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=785, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:23:28,785 INFO L87 Difference]: Start difference. First operand 4803 states and 16542 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:32,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:32,779 INFO L93 Difference]: Finished difference Result 10397 states and 31892 transitions. [2022-03-01 18:23:32,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-01 18:23:32,779 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:23:32,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:32,801 INFO L225 Difference]: With dead ends: 10397 [2022-03-01 18:23:32,801 INFO L226 Difference]: Without dead ends: 10367 [2022-03-01 18:23:32,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 44 SyntacticMatches, 8 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4165 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2285, Invalid=8635, Unknown=0, NotChecked=0, Total=10920 [2022-03-01 18:23:32,802 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 832 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 1919 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 2453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 1919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:32,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 431 Invalid, 2453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 1919 Invalid, 0 Unknown, 234 Unchecked, 1.0s Time] [2022-03-01 18:23:32,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10367 states. [2022-03-01 18:23:32,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10367 to 4820. [2022-03-01 18:23:32,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4820 states, 4819 states have (on average 3.449678356505499) internal successors, (16624), 4819 states have internal predecessors, (16624), 0 states have call successors, (0), 0 states 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 18:23:32,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4820 states to 4820 states and 16624 transitions. [2022-03-01 18:23:32,927 INFO L78 Accepts]: Start accepts. Automaton has 4820 states and 16624 transitions. Word has length 30 [2022-03-01 18:23:32,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:32,927 INFO L470 AbstractCegarLoop]: Abstraction has 4820 states and 16624 transitions. [2022-03-01 18:23:32,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:32,928 INFO L276 IsEmpty]: Start isEmpty. Operand 4820 states and 16624 transitions. [2022-03-01 18:23:32,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:23:32,935 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:32,935 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, 1, 1, 1, 1] [2022-03-01 18:23:32,952 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 18:23:33,150 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,SelfDestructingSolverStorable64 [2022-03-01 18:23:33,150 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:23:33,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:33,150 INFO L85 PathProgramCache]: Analyzing trace with hash -909401901, now seen corresponding path program 26 times [2022-03-01 18:23:33,150 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:33,151 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624319710] [2022-03-01 18:23:33,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:33,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:33,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:33,536 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:33,536 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:33,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624319710] [2022-03-01 18:23:33,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624319710] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:33,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138514226] [2022-03-01 18:23:33,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:23:33,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:33,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:33,539 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 18:23:33,539 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 18:23:33,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:23:33,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:33,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 18:23:33,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:33,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:33,796 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:33,796 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2022-03-01 18:23:33,824 INFO L353 Elim1Store]: treesize reduction 41, result has 55.9 percent of original size [2022-03-01 18:23:33,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 42 treesize of output 69 [2022-03-01 18:23:33,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:33,830 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:33,831 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-03-01 18:23:33,926 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:33,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:34,246 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:23:34,247 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 46 treesize of output 81 [2022-03-01 18:23:34,279 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:34,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-01 18:23:34,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:34,303 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:34,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-01 18:23:35,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:35,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:35,445 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:35,445 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 45 treesize of output 72 [2022-03-01 18:23:35,476 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:23:35,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-01 18:23:35,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:35,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:35,491 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:35,491 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 65 treesize of output 81 [2022-03-01 18:23:35,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:35,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138514226] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:35,712 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:35,712 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 18:23:35,712 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269758544] [2022-03-01 18:23:35,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:35,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:23:35,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:35,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:23:35,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:23:35,713 INFO L87 Difference]: Start difference. First operand 4820 states and 16624 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 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 18:23:43,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:43,035 INFO L93 Difference]: Finished difference Result 10094 states and 32208 transitions. [2022-03-01 18:23:43,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-01 18:23:43,035 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 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 18:23:43,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:43,055 INFO L225 Difference]: With dead ends: 10094 [2022-03-01 18:23:43,055 INFO L226 Difference]: Without dead ends: 10035 [2022-03-01 18:23:43,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6117 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2135, Invalid=15421, Unknown=0, NotChecked=0, Total=17556 [2022-03-01 18:23:43,061 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 718 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 3304 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 3493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 3304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:43,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 754 Invalid, 3493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 3304 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-01 18:23:43,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10035 states. [2022-03-01 18:23:43,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10035 to 4803. [2022-03-01 18:23:43,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 4802 states have (on average 3.445855893377759) internal successors, (16547), 4802 states have internal predecessors, (16547), 0 states have call successors, (0), 0 states 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 18:23:43,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 16547 transitions. [2022-03-01 18:23:43,172 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 16547 transitions. Word has length 30 [2022-03-01 18:23:43,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:43,172 INFO L470 AbstractCegarLoop]: Abstraction has 4803 states and 16547 transitions. [2022-03-01 18:23:43,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 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 18:23:43,172 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 16547 transitions. [2022-03-01 18:23:43,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:23:43,179 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:43,179 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, 1, 1, 1, 1] [2022-03-01 18:23:43,196 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 18:23:43,393 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,SelfDestructingSolverStorable65 [2022-03-01 18:23:43,394 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:23:43,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:43,394 INFO L85 PathProgramCache]: Analyzing trace with hash -980079081, now seen corresponding path program 27 times [2022-03-01 18:23:43,394 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:43,394 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734473761] [2022-03-01 18:23:43,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:43,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:43,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:43,712 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:43,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734473761] [2022-03-01 18:23:43,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734473761] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:43,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870383146] [2022-03-01 18:23:43,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:23:43,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:43,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:43,713 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 18:23:43,714 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 18:23:43,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:23:43,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:43,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:23:43,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:48,093 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:48,094 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 48 treesize of output 64 [2022-03-01 18:23:48,110 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:48,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 40 treesize of output 64 [2022-03-01 18:23:48,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:48,141 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 67 treesize of output 79 [2022-03-01 18:23:48,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:48,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:57,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:57,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 117 [2022-03-01 18:23:57,739 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:57,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 68 treesize of output 111 [2022-03-01 18:23:57,769 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:57,770 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 91 treesize of output 115 [2022-03-01 18:24:03,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:03,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870383146] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:03,920 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:03,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 33 [2022-03-01 18:24:03,921 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731358095] [2022-03-01 18:24:03,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:03,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 18:24:03,921 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:03,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 18:24:03,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=908, Unknown=11, NotChecked=0, Total=1056 [2022-03-01 18:24:03,921 INFO L87 Difference]: Start difference. First operand 4803 states and 16547 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 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 18:24:31,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:31,529 INFO L93 Difference]: Finished difference Result 7463 states and 24999 transitions. [2022-03-01 18:24:31,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-01 18:24:31,529 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 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 18:24:31,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:31,544 INFO L225 Difference]: With dead ends: 7463 [2022-03-01 18:24:31,544 INFO L226 Difference]: Without dead ends: 7456 [2022-03-01 18:24:31,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1078 ImplicationChecksByTransitivity, 39.7s TimeCoverageRelationStatistics Valid=596, Invalid=3548, Unknown=16, NotChecked=0, Total=4160 [2022-03-01 18:24:31,545 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 325 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 2227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 739 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:31,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 402 Invalid, 2227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1359 Invalid, 0 Unknown, 739 Unchecked, 0.7s Time] [2022-03-01 18:24:31,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7456 states. [2022-03-01 18:24:31,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7456 to 4807. [2022-03-01 18:24:31,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4807 states, 4806 states have (on average 3.4454848106533498) internal successors, (16559), 4806 states have internal predecessors, (16559), 0 states have call successors, (0), 0 states 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 18:24:31,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4807 states to 4807 states and 16559 transitions. [2022-03-01 18:24:31,654 INFO L78 Accepts]: Start accepts. Automaton has 4807 states and 16559 transitions. Word has length 30 [2022-03-01 18:24:31,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:31,655 INFO L470 AbstractCegarLoop]: Abstraction has 4807 states and 16559 transitions. [2022-03-01 18:24:31,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 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 18:24:31,655 INFO L276 IsEmpty]: Start isEmpty. Operand 4807 states and 16559 transitions. [2022-03-01 18:24:31,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:24:31,662 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:31,662 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, 1, 1, 1, 1] [2022-03-01 18:24:31,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-01 18:24:31,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:31,871 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:31,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:31,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1990099571, now seen corresponding path program 28 times [2022-03-01 18:24:31,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:31,873 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580509047] [2022-03-01 18:24:31,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:31,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:32,257 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:32,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580509047] [2022-03-01 18:24:32,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580509047] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:32,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190084550] [2022-03-01 18:24:32,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:24:32,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:32,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:32,268 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 18:24:32,269 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 18:24:32,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:24:32,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:32,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:24:32,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:32,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:32,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:32,623 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 47 treesize of output 39 [2022-03-01 18:24:32,635 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-01 18:24:32,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 39 treesize of output 34 [2022-03-01 18:24:32,637 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 16 [2022-03-01 18:24:32,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:32,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:32,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:32,909 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:32,910 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 45 treesize of output 80 [2022-03-01 18:24:32,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:32,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-01 18:24:32,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:32,962 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:32,963 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 97 treesize of output 111 [2022-03-01 18:24:34,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:34,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:34,954 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:34,954 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 45 treesize of output 72 [2022-03-01 18:24:34,998 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:24:34,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-01 18:24:35,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:35,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:35,019 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:35,019 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 65 treesize of output 81 [2022-03-01 18:24:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:35,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190084550] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:35,380 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:35,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-03-01 18:24:35,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926807843] [2022-03-01 18:24:35,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:35,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:24:35,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:35,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:24:35,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:24:35,381 INFO L87 Difference]: Start difference. First operand 4807 states and 16559 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:37,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:37,961 INFO L93 Difference]: Finished difference Result 7801 states and 25123 transitions. [2022-03-01 18:24:37,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 18:24:37,962 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:24:37,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:37,977 INFO L225 Difference]: With dead ends: 7801 [2022-03-01 18:24:37,977 INFO L226 Difference]: Without dead ends: 7771 [2022-03-01 18:24:37,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1903 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=855, Invalid=4997, Unknown=0, NotChecked=0, Total=5852 [2022-03-01 18:24:37,978 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 413 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1833 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 2004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:37,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 297 Invalid, 2004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1833 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 18:24:37,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7771 states. [2022-03-01 18:24:38,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7771 to 4813. [2022-03-01 18:24:38,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4813 states, 4812 states have (on average 3.4457605985037407) internal successors, (16581), 4812 states have internal predecessors, (16581), 0 states have call successors, (0), 0 states 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 18:24:38,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4813 states to 4813 states and 16581 transitions. [2022-03-01 18:24:38,075 INFO L78 Accepts]: Start accepts. Automaton has 4813 states and 16581 transitions. Word has length 30 [2022-03-01 18:24:38,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:38,075 INFO L470 AbstractCegarLoop]: Abstraction has 4813 states and 16581 transitions. [2022-03-01 18:24:38,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:38,075 INFO L276 IsEmpty]: Start isEmpty. Operand 4813 states and 16581 transitions. [2022-03-01 18:24:38,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:24:38,082 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:38,082 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, 1, 1, 1, 1] [2022-03-01 18:24:38,100 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 18:24:38,295 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,SelfDestructingSolverStorable67 [2022-03-01 18:24:38,295 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:38,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:38,296 INFO L85 PathProgramCache]: Analyzing trace with hash -2065974609, now seen corresponding path program 29 times [2022-03-01 18:24:38,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:38,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853168107] [2022-03-01 18:24:38,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:38,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:38,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:38,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:38,592 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:38,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853168107] [2022-03-01 18:24:38,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853168107] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:38,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594806546] [2022-03-01 18:24:38,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:24:38,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:38,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:38,605 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 18:24:38,606 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 18:24:38,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:24:38,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:38,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:24:38,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:38,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:38,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:38,995 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 50 treesize of output 42 [2022-03-01 18:24:39,010 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-01 18:24:39,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 42 treesize of output 37 [2022-03-01 18:24:39,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:39,013 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 16 [2022-03-01 18:24:39,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:39,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:39,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:39,389 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:39,389 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 45 treesize of output 80 [2022-03-01 18:24:39,421 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:39,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-01 18:24:39,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:39,445 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:39,445 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 97 treesize of output 111 [2022-03-01 18:24:40,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:40,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:40,184 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:40,184 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 45 treesize of output 72 [2022-03-01 18:24:40,218 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:24:40,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-01 18:24:40,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:40,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:40,236 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:40,236 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 65 treesize of output 81 [2022-03-01 18:24:40,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:40,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594806546] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:40,635 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:40,635 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2022-03-01 18:24:40,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124381966] [2022-03-01 18:24:40,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:40,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 18:24:40,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:40,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 18:24:40,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:24:40,636 INFO L87 Difference]: Start difference. First operand 4813 states and 16581 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 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 18:24:47,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:47,416 INFO L93 Difference]: Finished difference Result 8556 states and 27077 transitions. [2022-03-01 18:24:47,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-01 18:24:47,416 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 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 18:24:47,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:47,432 INFO L225 Difference]: With dead ends: 8556 [2022-03-01 18:24:47,432 INFO L226 Difference]: Without dead ends: 8526 [2022-03-01 18:24:47,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5052 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1729, Invalid=14273, Unknown=0, NotChecked=0, Total=16002 [2022-03-01 18:24:47,433 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 503 mSDsluCounter, 1681 mSDsCounter, 0 mSdLazyCounter, 4108 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 4313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 4108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:47,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 843 Invalid, 4313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 4108 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-01 18:24:47,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8526 states. [2022-03-01 18:24:47,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8526 to 4824. [2022-03-01 18:24:47,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4824 states, 4823 states have (on average 3.4474393530997305) internal successors, (16627), 4823 states have internal predecessors, (16627), 0 states have call successors, (0), 0 states 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 18:24:47,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4824 states to 4824 states and 16627 transitions. [2022-03-01 18:24:47,526 INFO L78 Accepts]: Start accepts. Automaton has 4824 states and 16627 transitions. Word has length 30 [2022-03-01 18:24:47,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:47,526 INFO L470 AbstractCegarLoop]: Abstraction has 4824 states and 16627 transitions. [2022-03-01 18:24:47,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 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 18:24:47,527 INFO L276 IsEmpty]: Start isEmpty. Operand 4824 states and 16627 transitions. [2022-03-01 18:24:47,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:24:47,533 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:47,533 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, 1, 1, 1, 1] [2022-03-01 18:24:47,551 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 18:24:47,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-01 18:24:47,749 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:47,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:47,749 INFO L85 PathProgramCache]: Analyzing trace with hash 73995961, now seen corresponding path program 30 times [2022-03-01 18:24:47,749 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:47,749 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443130279] [2022-03-01 18:24:47,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:47,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:47,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:48,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:48,053 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:48,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443130279] [2022-03-01 18:24:48,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443130279] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:48,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91500460] [2022-03-01 18:24:48,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:24:48,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:48,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:48,068 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 18:24:48,117 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 18:24:48,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:24:48,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:48,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:24:48,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:48,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:48,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:48,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:48,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:48,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:48,350 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:48,351 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 59 [2022-03-01 18:24:48,382 INFO L353 Elim1Store]: treesize reduction 47, result has 55.2 percent of original size [2022-03-01 18:24:48,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 49 treesize of output 78 [2022-03-01 18:24:48,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:48,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:48,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:48,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:48,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:48,391 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:48,391 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 65 [2022-03-01 18:24:48,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:48,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:48,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:48,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:48,774 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 45 treesize of output 80 [2022-03-01 18:24:48,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:48,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-01 18:24:48,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:48,832 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:48,832 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 97 treesize of output 111 [2022-03-01 18:24:49,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:49,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:49,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:49,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-01 18:24:49,770 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:24:49,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-01 18:24:49,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:49,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:49,790 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:49,790 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 65 treesize of output 81 [2022-03-01 18:24:50,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:50,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91500460] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:50,117 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:50,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-01 18:24:50,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931105175] [2022-03-01 18:24:50,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:50,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:24:50,118 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:50,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:24:50,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:24:50,118 INFO L87 Difference]: Start difference. First operand 4824 states and 16627 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 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 18:24:55,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:55,394 INFO L93 Difference]: Finished difference Result 9374 states and 29675 transitions. [2022-03-01 18:24:55,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-01 18:24:55,395 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 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 18:24:55,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:55,414 INFO L225 Difference]: With dead ends: 9374 [2022-03-01 18:24:55,414 INFO L226 Difference]: Without dead ends: 9284 [2022-03-01 18:24:55,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4310 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1881, Invalid=10329, Unknown=0, NotChecked=0, Total=12210 [2022-03-01 18:24:55,416 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 579 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 3087 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 3346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 3087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:55,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [579 Valid, 544 Invalid, 3346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 3087 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-01 18:24:55,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9284 states. [2022-03-01 18:24:55,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9284 to 4828. [2022-03-01 18:24:55,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4828 states, 4827 states have (on average 3.4481044126786826) internal successors, (16644), 4827 states have internal predecessors, (16644), 0 states have call successors, (0), 0 states 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 18:24:55,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4828 states to 4828 states and 16644 transitions. [2022-03-01 18:24:55,543 INFO L78 Accepts]: Start accepts. Automaton has 4828 states and 16644 transitions. Word has length 30 [2022-03-01 18:24:55,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:55,543 INFO L470 AbstractCegarLoop]: Abstraction has 4828 states and 16644 transitions. [2022-03-01 18:24:55,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 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 18:24:55,543 INFO L276 IsEmpty]: Start isEmpty. Operand 4828 states and 16644 transitions. [2022-03-01 18:24:55,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:24:55,550 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:55,551 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, 1, 1, 1, 1] [2022-03-01 18:24:55,568 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 18:24:55,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-01 18:24:55,767 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:55,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:55,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1141165369, now seen corresponding path program 31 times [2022-03-01 18:24:55,767 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:55,767 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251199012] [2022-03-01 18:24:55,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:55,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:56,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:56,066 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:56,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251199012] [2022-03-01 18:24:56,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251199012] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:56,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110208212] [2022-03-01 18:24:56,066 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:24:56,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:56,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:56,071 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 18:24:56,082 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 18:24:56,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:56,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:24:56,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:56,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:56,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:56,434 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 48 treesize of output 40 [2022-03-01 18:24:56,446 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-01 18:24:56,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 40 treesize of output 35 [2022-03-01 18:24:56,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:56,449 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 16 [2022-03-01 18:24:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:56,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:56,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:56,697 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:56,697 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-03-01 18:24:56,725 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:56,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-01 18:24:56,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:56,746 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:56,746 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-01 18:24:58,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:58,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:58,392 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:58,392 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 45 treesize of output 72 [2022-03-01 18:24:58,423 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:24:58,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-01 18:24:58,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:58,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:58,437 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:58,437 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 65 treesize of output 81 [2022-03-01 18:24:58,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:58,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110208212] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:58,678 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:58,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-01 18:24:58,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521848198] [2022-03-01 18:24:58,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:58,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:24:58,678 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:58,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:24:58,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:24:58,679 INFO L87 Difference]: Start difference. First operand 4828 states and 16644 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 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 18:25:02,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:02,087 INFO L93 Difference]: Finished difference Result 8300 states and 26710 transitions. [2022-03-01 18:25:02,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-01 18:25:02,087 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 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 18:25:02,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:02,103 INFO L225 Difference]: With dead ends: 8300 [2022-03-01 18:25:02,103 INFO L226 Difference]: Without dead ends: 8270 [2022-03-01 18:25:02,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2727 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1231, Invalid=6779, Unknown=0, NotChecked=0, Total=8010 [2022-03-01 18:25:02,104 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 452 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 2783 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 2994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 2783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:02,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 468 Invalid, 2994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 2783 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-01 18:25:02,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8270 states. [2022-03-01 18:25:02,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8270 to 4813. [2022-03-01 18:25:02,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4813 states, 4812 states have (on average 3.4463840399002494) internal successors, (16584), 4812 states have internal predecessors, (16584), 0 states have call successors, (0), 0 states 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 18:25:02,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4813 states to 4813 states and 16584 transitions. [2022-03-01 18:25:02,195 INFO L78 Accepts]: Start accepts. Automaton has 4813 states and 16584 transitions. Word has length 30 [2022-03-01 18:25:02,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:02,195 INFO L470 AbstractCegarLoop]: Abstraction has 4813 states and 16584 transitions. [2022-03-01 18:25:02,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 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 18:25:02,195 INFO L276 IsEmpty]: Start isEmpty. Operand 4813 states and 16584 transitions. [2022-03-01 18:25:02,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:25:02,202 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:02,202 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, 1, 1, 1, 1] [2022-03-01 18:25:02,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-01 18:25:02,409 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,SelfDestructingSolverStorable70 [2022-03-01 18:25:02,409 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:02,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:02,409 INFO L85 PathProgramCache]: Analyzing trace with hash -769410283, now seen corresponding path program 32 times [2022-03-01 18:25:02,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:02,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827645372] [2022-03-01 18:25:02,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:02,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:02,744 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:02,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827645372] [2022-03-01 18:25:02,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827645372] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:02,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704239905] [2022-03-01 18:25:02,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:25:02,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:02,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:02,746 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 18:25:02,776 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 18:25:02,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:25:02,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:02,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:25:02,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:03,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:03,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:03,105 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 35 [2022-03-01 18:25:03,117 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-01 18:25:03,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 30 [2022-03-01 18:25:03,119 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 16 [2022-03-01 18:25:03,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:03,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:03,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:03,421 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:03,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-03-01 18:25:03,453 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:03,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-01 18:25:03,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:03,476 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:03,476 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 97 treesize of output 111 [2022-03-01 18:25:05,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:05,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:05,843 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:05,843 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 45 treesize of output 72 [2022-03-01 18:25:05,889 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:25:05,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-01 18:25:05,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:05,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:05,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:05,913 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 65 treesize of output 81 [2022-03-01 18:25:06,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:06,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704239905] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:06,299 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:06,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-03-01 18:25:06,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169855209] [2022-03-01 18:25:06,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:06,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:25:06,299 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:06,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:25:06,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:25:06,300 INFO L87 Difference]: Start difference. First operand 4813 states and 16584 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:10,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:10,541 INFO L93 Difference]: Finished difference Result 8554 states and 27486 transitions. [2022-03-01 18:25:10,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-01 18:25:10,541 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:25:10,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:10,557 INFO L225 Difference]: With dead ends: 8554 [2022-03-01 18:25:10,557 INFO L226 Difference]: Without dead ends: 8503 [2022-03-01 18:25:10,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2871 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1274, Invalid=7656, Unknown=0, NotChecked=0, Total=8930 [2022-03-01 18:25:10,558 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 514 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 2537 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 2784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 2537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:10,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [514 Valid, 365 Invalid, 2784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 2537 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-01 18:25:10,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8503 states. [2022-03-01 18:25:10,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8503 to 4860. [2022-03-01 18:25:10,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4860 states, 4859 states have (on average 3.448857789668656) internal successors, (16758), 4859 states have internal predecessors, (16758), 0 states have call successors, (0), 0 states 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 18:25:10,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4860 states to 4860 states and 16758 transitions. [2022-03-01 18:25:10,670 INFO L78 Accepts]: Start accepts. Automaton has 4860 states and 16758 transitions. Word has length 30 [2022-03-01 18:25:10,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:10,670 INFO L470 AbstractCegarLoop]: Abstraction has 4860 states and 16758 transitions. [2022-03-01 18:25:10,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:10,670 INFO L276 IsEmpty]: Start isEmpty. Operand 4860 states and 16758 transitions. [2022-03-01 18:25:10,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:25:10,677 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:10,677 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, 1, 1, 1, 1] [2022-03-01 18:25:10,693 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 18:25:10,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:10,890 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:10,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:10,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1370560287, now seen corresponding path program 33 times [2022-03-01 18:25:10,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:10,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634072082] [2022-03-01 18:25:10,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:10,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:10,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:11,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:11,242 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:11,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634072082] [2022-03-01 18:25:11,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634072082] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:11,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427282178] [2022-03-01 18:25:11,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:25:11,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:11,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:11,243 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 18:25:11,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:25:11,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:11,286 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 18:25:11,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:25:11,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:11,584 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:11,584 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 48 treesize of output 64 [2022-03-01 18:25:11,600 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:11,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 40 treesize of output 64 [2022-03-01 18:25:11,611 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:11,611 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 67 treesize of output 79 [2022-03-01 18:25:13,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:13,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:21,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:21,621 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 84 treesize of output 117 [2022-03-01 18:25:21,652 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:21,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 68 treesize of output 111 [2022-03-01 18:25:21,682 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:21,682 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 91 treesize of output 115 [2022-03-01 18:25:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:25,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427282178] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:25,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:25,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 33 [2022-03-01 18:25:25,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034995344] [2022-03-01 18:25:25,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:25,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 18:25:25,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:25,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 18:25:25,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=890, Unknown=7, NotChecked=0, Total=1056 [2022-03-01 18:25:25,392 INFO L87 Difference]: Start difference. First operand 4860 states and 16758 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 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 18:25:31,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:31,952 INFO L93 Difference]: Finished difference Result 9120 states and 30249 transitions. [2022-03-01 18:25:31,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-01 18:25:31,952 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 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 18:25:31,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:31,971 INFO L225 Difference]: With dead ends: 9120 [2022-03-01 18:25:31,971 INFO L226 Difference]: Without dead ends: 9095 [2022-03-01 18:25:31,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3053 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=1838, Invalid=7661, Unknown=7, NotChecked=0, Total=9506 [2022-03-01 18:25:31,971 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 523 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 1819 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 2871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 1819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 776 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:31,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 422 Invalid, 2871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 1819 Invalid, 0 Unknown, 776 Unchecked, 1.1s Time] [2022-03-01 18:25:31,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9095 states. [2022-03-01 18:25:32,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9095 to 4905. [2022-03-01 18:25:32,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4905 states, 4904 states have (on average 3.4494290375203915) internal successors, (16916), 4904 states have internal predecessors, (16916), 0 states have call successors, (0), 0 states 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 18:25:32,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4905 states to 4905 states and 16916 transitions. [2022-03-01 18:25:32,071 INFO L78 Accepts]: Start accepts. Automaton has 4905 states and 16916 transitions. Word has length 30 [2022-03-01 18:25:32,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:32,072 INFO L470 AbstractCegarLoop]: Abstraction has 4905 states and 16916 transitions. [2022-03-01 18:25:32,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 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 18:25:32,072 INFO L276 IsEmpty]: Start isEmpty. Operand 4905 states and 16916 transitions. [2022-03-01 18:25:32,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:25:32,079 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:32,079 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, 1, 1, 1, 1] [2022-03-01 18:25:32,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-01 18:25:32,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:32,280 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:32,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:32,280 INFO L85 PathProgramCache]: Analyzing trace with hash 402668975, now seen corresponding path program 34 times [2022-03-01 18:25:32,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:32,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991601409] [2022-03-01 18:25:32,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:32,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:32,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:32,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:32,539 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:32,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991601409] [2022-03-01 18:25:32,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991601409] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:32,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254458743] [2022-03-01 18:25:32,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:25:32,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:32,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:32,541 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 18:25:32,542 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 18:25:32,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:25:32,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:32,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:25:32,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:32,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:32,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:32,785 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 50 treesize of output 42 [2022-03-01 18:25:32,795 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-01 18:25:32,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 42 treesize of output 37 [2022-03-01 18:25:32,797 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 21 [2022-03-01 18:25:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:32,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:33,135 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:25:33,135 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 46 treesize of output 81 [2022-03-01 18:25:33,167 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:33,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-01 18:25:33,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:33,204 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:33,204 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 97 treesize of output 111 [2022-03-01 18:25:33,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:33,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:33,840 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:33,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-01 18:25:33,884 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:25:33,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-01 18:25:33,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:33,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:33,957 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:33,957 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 65 treesize of output 81 [2022-03-01 18:25:34,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:34,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254458743] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:34,270 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:34,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 18:25:34,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486556979] [2022-03-01 18:25:34,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:34,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:25:34,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:34,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:25:34,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:25:34,271 INFO L87 Difference]: Start difference. First operand 4905 states and 16916 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:38,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:38,106 INFO L93 Difference]: Finished difference Result 8809 states and 28697 transitions. [2022-03-01 18:25:38,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-01 18:25:38,106 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:25:38,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:38,126 INFO L225 Difference]: With dead ends: 8809 [2022-03-01 18:25:38,126 INFO L226 Difference]: Without dead ends: 8769 [2022-03-01 18:25:38,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2694 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1111, Invalid=7819, Unknown=0, NotChecked=0, Total=8930 [2022-03-01 18:25:38,127 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 469 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 2569 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 2770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 2569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:38,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 454 Invalid, 2770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 2569 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-01 18:25:38,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8769 states. [2022-03-01 18:25:38,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8769 to 4890. [2022-03-01 18:25:38,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4890 states, 4889 states have (on average 3.449580691347924) internal successors, (16865), 4889 states have internal predecessors, (16865), 0 states have call successors, (0), 0 states 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 18:25:38,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4890 states to 4890 states and 16865 transitions. [2022-03-01 18:25:38,241 INFO L78 Accepts]: Start accepts. Automaton has 4890 states and 16865 transitions. Word has length 30 [2022-03-01 18:25:38,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:38,241 INFO L470 AbstractCegarLoop]: Abstraction has 4890 states and 16865 transitions. [2022-03-01 18:25:38,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:38,241 INFO L276 IsEmpty]: Start isEmpty. Operand 4890 states and 16865 transitions. [2022-03-01 18:25:38,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:25:38,248 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:38,249 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, 1, 1, 1, 1] [2022-03-01 18:25:38,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-01 18:25:38,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:38,465 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:38,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:38,465 INFO L85 PathProgramCache]: Analyzing trace with hash -3113723, now seen corresponding path program 35 times [2022-03-01 18:25:38,465 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:38,465 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383674376] [2022-03-01 18:25:38,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:38,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:38,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:38,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:38,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:38,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383674376] [2022-03-01 18:25:38,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383674376] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:38,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396604165] [2022-03-01 18:25:38,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:25:38,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:38,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:38,794 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 18:25:38,795 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 18:25:38,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:25:38,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:38,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 18:25:38,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:39,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:39,096 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:39,096 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 43 treesize of output 43 [2022-03-01 18:25:39,110 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:39,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 59 [2022-03-01 18:25:39,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:39,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:39,117 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 67 treesize of output 63 [2022-03-01 18:25:39,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:39,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:39,555 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:25:39,555 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 46 treesize of output 81 [2022-03-01 18:25:39,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:39,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-01 18:25:39,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:39,614 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:39,614 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 97 treesize of output 111 [2022-03-01 18:25:40,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:40,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:40,395 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:40,395 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 45 treesize of output 72 [2022-03-01 18:25:40,439 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:25:40,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-01 18:25:40,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:40,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:40,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:40,462 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 65 treesize of output 81 [2022-03-01 18:25:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:40,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396604165] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:40,848 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:40,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 33 [2022-03-01 18:25:40,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952897536] [2022-03-01 18:25:40,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:40,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 18:25:40,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:40,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 18:25:40,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:25:40,849 INFO L87 Difference]: Start difference. First operand 4890 states and 16865 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:45,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:45,814 INFO L93 Difference]: Finished difference Result 10206 states and 32855 transitions. [2022-03-01 18:25:45,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-01 18:25:45,814 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:25:45,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:45,834 INFO L225 Difference]: With dead ends: 10206 [2022-03-01 18:25:45,834 INFO L226 Difference]: Without dead ends: 10088 [2022-03-01 18:25:45,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4073 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1509, Invalid=11601, Unknown=0, NotChecked=0, Total=13110 [2022-03-01 18:25:45,836 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 534 mSDsluCounter, 1488 mSDsCounter, 0 mSdLazyCounter, 4015 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 4223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 4015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:45,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 700 Invalid, 4223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 4015 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-01 18:25:45,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10088 states. [2022-03-01 18:25:45,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10088 to 4890. [2022-03-01 18:25:45,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4890 states, 4889 states have (on average 3.449580691347924) internal successors, (16865), 4889 states have internal predecessors, (16865), 0 states have call successors, (0), 0 states 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 18:25:45,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4890 states to 4890 states and 16865 transitions. [2022-03-01 18:25:45,967 INFO L78 Accepts]: Start accepts. Automaton has 4890 states and 16865 transitions. Word has length 30 [2022-03-01 18:25:45,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:45,967 INFO L470 AbstractCegarLoop]: Abstraction has 4890 states and 16865 transitions. [2022-03-01 18:25:45,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:45,968 INFO L276 IsEmpty]: Start isEmpty. Operand 4890 states and 16865 transitions. [2022-03-01 18:25:45,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:25:45,975 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:45,975 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, 1, 1, 1, 1] [2022-03-01 18:25:45,991 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 18:25:46,183 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,SelfDestructingSolverStorable74 [2022-03-01 18:25:46,183 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:46,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:46,184 INFO L85 PathProgramCache]: Analyzing trace with hash 363581355, now seen corresponding path program 36 times [2022-03-01 18:25:46,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:46,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706690968] [2022-03-01 18:25:46,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:46,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:46,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:46,459 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:46,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706690968] [2022-03-01 18:25:46,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706690968] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:46,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152117362] [2022-03-01 18:25:46,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:25:46,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:46,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:46,461 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 18:25:46,461 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 18:25:46,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:25:46,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:46,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:25:46,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:46,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:46,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:46,762 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 53 treesize of output 45 [2022-03-01 18:25:46,777 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-01 18:25:46,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 45 treesize of output 40 [2022-03-01 18:25:46,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:46,780 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 16 [2022-03-01 18:25:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:46,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:47,120 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:25:47,121 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 45 treesize of output 80 [2022-03-01 18:25:47,153 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:47,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-01 18:25:47,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:47,177 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:47,177 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 97 treesize of output 111 [2022-03-01 18:25:48,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:48,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:48,299 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:48,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-01 18:25:48,355 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:25:48,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-01 18:25:48,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:48,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:48,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:48,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-01 18:25:48,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:48,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152117362] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:48,821 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:48,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-01 18:25:48,821 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292874152] [2022-03-01 18:25:48,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:48,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:25:48,822 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:48,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:25:48,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:25:48,822 INFO L87 Difference]: Start difference. First operand 4890 states and 16865 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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 18:25:52,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:52,318 INFO L93 Difference]: Finished difference Result 8571 states and 27884 transitions. [2022-03-01 18:25:52,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-01 18:25:52,319 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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 18:25:52,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:52,335 INFO L225 Difference]: With dead ends: 8571 [2022-03-01 18:25:52,335 INFO L226 Difference]: Without dead ends: 8537 [2022-03-01 18:25:52,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2543 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=917, Invalid=7455, Unknown=0, NotChecked=0, Total=8372 [2022-03-01 18:25:52,336 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 384 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 2613 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 2765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 2613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:52,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 448 Invalid, 2765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2613 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-01 18:25:52,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8537 states. [2022-03-01 18:25:52,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8537 to 5050. [2022-03-01 18:25:52,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5050 states, 5049 states have (on average 3.4476133887898595) internal successors, (17407), 5049 states have internal predecessors, (17407), 0 states have call successors, (0), 0 states 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 18:25:52,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5050 states to 5050 states and 17407 transitions. [2022-03-01 18:25:52,433 INFO L78 Accepts]: Start accepts. Automaton has 5050 states and 17407 transitions. Word has length 30 [2022-03-01 18:25:52,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:52,433 INFO L470 AbstractCegarLoop]: Abstraction has 5050 states and 17407 transitions. [2022-03-01 18:25:52,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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 18:25:52,433 INFO L276 IsEmpty]: Start isEmpty. Operand 5050 states and 17407 transitions. [2022-03-01 18:25:52,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:25:52,440 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:52,440 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, 1, 1, 1, 1] [2022-03-01 18:25:52,455 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 18:25:52,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:52,651 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:52,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:52,651 INFO L85 PathProgramCache]: Analyzing trace with hash -720955961, now seen corresponding path program 37 times [2022-03-01 18:25:52,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:52,651 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450373569] [2022-03-01 18:25:52,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:52,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:52,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:52,913 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:52,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450373569] [2022-03-01 18:25:52,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450373569] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:52,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988615837] [2022-03-01 18:25:52,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:25:52,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:52,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:52,915 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 18:25:52,915 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 18:25:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:52,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:25:52,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:53,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:53,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:53,247 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 50 treesize of output 42 [2022-03-01 18:25:53,259 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-01 18:25:53,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 42 treesize of output 37 [2022-03-01 18:25:53,262 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 20 treesize of output 16 [2022-03-01 18:25:53,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:53,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:53,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:53,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:53,534 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 45 treesize of output 80 [2022-03-01 18:25:53,563 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:53,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-01 18:25:53,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:53,584 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:53,585 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 97 treesize of output 111 [2022-03-01 18:25:54,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:54,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:54,214 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:54,214 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 45 treesize of output 72 [2022-03-01 18:25:54,257 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:25:54,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-01 18:25:54,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:54,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:54,278 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:54,278 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 65 treesize of output 81 [2022-03-01 18:25:54,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:54,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988615837] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:54,692 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:54,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-01 18:25:54,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184678324] [2022-03-01 18:25:54,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:54,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:25:54,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:54,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:25:54,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:25:54,693 INFO L87 Difference]: Start difference. First operand 5050 states and 17407 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 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 18:25:59,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:59,593 INFO L93 Difference]: Finished difference Result 9090 states and 29140 transitions. [2022-03-01 18:25:59,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-01 18:25:59,593 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 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 18:25:59,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:59,611 INFO L225 Difference]: With dead ends: 9090 [2022-03-01 18:25:59,611 INFO L226 Difference]: Without dead ends: 9033 [2022-03-01 18:25:59,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4232 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1717, Invalid=10493, Unknown=0, NotChecked=0, Total=12210 [2022-03-01 18:25:59,612 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 488 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 2823 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 3045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 2823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:59,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 399 Invalid, 3045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 2823 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-01 18:25:59,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9033 states. [2022-03-01 18:25:59,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9033 to 5132. [2022-03-01 18:25:59,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5132 states, 5131 states have (on average 3.4433833560709415) internal successors, (17668), 5131 states have internal predecessors, (17668), 0 states have call successors, (0), 0 states 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 18:25:59,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5132 states to 5132 states and 17668 transitions. [2022-03-01 18:25:59,740 INFO L78 Accepts]: Start accepts. Automaton has 5132 states and 17668 transitions. Word has length 30 [2022-03-01 18:25:59,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:59,740 INFO L470 AbstractCegarLoop]: Abstraction has 5132 states and 17668 transitions. [2022-03-01 18:25:59,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 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 18:25:59,740 INFO L276 IsEmpty]: Start isEmpty. Operand 5132 states and 17668 transitions. [2022-03-01 18:25:59,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:25:59,747 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:59,748 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, 1, 1, 1, 1] [2022-03-01 18:25:59,765 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 18:25:59,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:59,961 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:59,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:59,961 INFO L85 PathProgramCache]: Analyzing trace with hash 768780149, now seen corresponding path program 38 times [2022-03-01 18:25:59,961 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:59,961 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420040462] [2022-03-01 18:25:59,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:59,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:26:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:00,282 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:26:00,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420040462] [2022-03-01 18:26:00,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420040462] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:26:00,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131156144] [2022-03-01 18:26:00,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:26:00,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:00,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:26:00,284 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 18:26:00,285 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 18:26:00,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:26:00,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:26:00,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:26:00,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:26:00,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:26:00,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:26:00,574 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:00,574 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 52 treesize of output 52 [2022-03-01 18:26:00,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:00,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 42 treesize of output 68 [2022-03-01 18:26:00,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:26:00,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:26:00,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:00,594 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 71 treesize of output 65 [2022-03-01 18:26:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:00,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:26:00,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:00,978 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:00,978 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 45 treesize of output 80 [2022-03-01 18:26:01,010 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:01,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-01 18:26:01,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:01,034 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:01,034 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 97 treesize of output 111 [2022-03-01 18:26:01,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:01,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:01,901 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:01,901 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 45 treesize of output 72 [2022-03-01 18:26:01,945 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:26:01,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-01 18:26:01,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:01,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:01,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:01,967 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 65 treesize of output 81 [2022-03-01 18:26:02,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:02,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131156144] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:26:02,410 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:26:02,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-01 18:26:02,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104780247] [2022-03-01 18:26:02,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:26:02,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:26:02,411 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:26:02,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:26:02,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:26:02,411 INFO L87 Difference]: Start difference. First operand 5132 states and 17668 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:08,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:26:08,871 INFO L93 Difference]: Finished difference Result 10200 states and 32429 transitions. [2022-03-01 18:26:08,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-03-01 18:26:08,871 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:26:08,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:26:08,893 INFO L225 Difference]: With dead ends: 10200 [2022-03-01 18:26:08,893 INFO L226 Difference]: Without dead ends: 10080 [2022-03-01 18:26:08,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6984 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2582, Invalid=16324, Unknown=0, NotChecked=0, Total=18906 [2022-03-01 18:26:08,895 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 574 mSDsluCounter, 1134 mSDsCounter, 0 mSdLazyCounter, 3213 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 3468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 3213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:26:08,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 554 Invalid, 3468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 3213 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-01 18:26:08,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10080 states. [2022-03-01 18:26:09,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10080 to 5115. [2022-03-01 18:26:09,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5115 states, 5114 states have (on average 3.4419241298396557) internal successors, (17602), 5114 states have internal predecessors, (17602), 0 states have call successors, (0), 0 states 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 18:26:09,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5115 states to 5115 states and 17602 transitions. [2022-03-01 18:26:09,047 INFO L78 Accepts]: Start accepts. Automaton has 5115 states and 17602 transitions. Word has length 30 [2022-03-01 18:26:09,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:26:09,047 INFO L470 AbstractCegarLoop]: Abstraction has 5115 states and 17602 transitions. [2022-03-01 18:26:09,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:09,048 INFO L276 IsEmpty]: Start isEmpty. Operand 5115 states and 17602 transitions. [2022-03-01 18:26:09,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:26:09,055 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:26:09,055 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, 1, 1, 1, 1] [2022-03-01 18:26:09,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-01 18:26:09,271 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,SelfDestructingSolverStorable77 [2022-03-01 18:26:09,271 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:26:09,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:26:09,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1129877915, now seen corresponding path program 39 times [2022-03-01 18:26:09,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:26:09,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639217680] [2022-03-01 18:26:09,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:26:09,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:26:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:26:09,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:09,590 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:26:09,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639217680] [2022-03-01 18:26:09,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639217680] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:26:09,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476649385] [2022-03-01 18:26:09,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:26:09,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:09,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:26:09,592 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 18:26:09,593 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 18:26:09,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:26:09,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:26:09,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:26:09,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:26:09,828 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:09,828 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 48 treesize of output 56 [2022-03-01 18:26:09,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:09,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 40 treesize of output 64 [2022-03-01 18:26:09,858 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:09,858 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 67 treesize of output 71 [2022-03-01 18:26:10,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:10,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:26:10,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:10,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:10,578 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:10,579 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 46 treesize of output 73 [2022-03-01 18:26:10,603 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:10,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-01 18:26:10,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:10,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:10,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:10,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 97 treesize of output 103 [2022-03-01 18:26:10,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:10,963 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 45 treesize of output 35 [2022-03-01 18:26:10,979 INFO L353 Elim1Store]: treesize reduction 67, result has 26.4 percent of original size [2022-03-01 18:26:10,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 33 [2022-03-01 18:26:10,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:10,982 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 15 treesize of output 11 [2022-03-01 18:26:11,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:11,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476649385] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:26:11,109 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:26:11,109 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-01 18:26:11,109 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020426575] [2022-03-01 18:26:11,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:26:11,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-01 18:26:11,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:26:11,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-01 18:26:11,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 18:26:11,110 INFO L87 Difference]: Start difference. First operand 5115 states and 17602 transitions. Second operand has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 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 18:26:15,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:26:15,100 INFO L93 Difference]: Finished difference Result 9935 states and 32181 transitions. [2022-03-01 18:26:15,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-01 18:26:15,100 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 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 18:26:15,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:26:15,118 INFO L225 Difference]: With dead ends: 9935 [2022-03-01 18:26:15,119 INFO L226 Difference]: Without dead ends: 9758 [2022-03-01 18:26:15,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3356 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1813, Invalid=9317, Unknown=0, NotChecked=0, Total=11130 [2022-03-01 18:26:15,119 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 817 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 2452 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 2709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 2452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:26:15,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [817 Valid, 459 Invalid, 2709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 2452 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-01 18:26:15,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9758 states. [2022-03-01 18:26:15,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9758 to 5189. [2022-03-01 18:26:15,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5189 states, 5188 states have (on average 3.4335003855050115) internal successors, (17813), 5188 states have internal predecessors, (17813), 0 states have call successors, (0), 0 states 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 18:26:15,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5189 states to 5189 states and 17813 transitions. [2022-03-01 18:26:15,236 INFO L78 Accepts]: Start accepts. Automaton has 5189 states and 17813 transitions. Word has length 30 [2022-03-01 18:26:15,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:26:15,236 INFO L470 AbstractCegarLoop]: Abstraction has 5189 states and 17813 transitions. [2022-03-01 18:26:15,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 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 18:26:15,236 INFO L276 IsEmpty]: Start isEmpty. Operand 5189 states and 17813 transitions. [2022-03-01 18:26:15,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:26:15,244 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:26:15,244 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, 1, 1, 1, 1] [2022-03-01 18:26:15,292 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 18:26:15,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-03-01 18:26:15,456 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:26:15,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:26:15,456 INFO L85 PathProgramCache]: Analyzing trace with hash 36149297, now seen corresponding path program 40 times [2022-03-01 18:26:15,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:26:15,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464208681] [2022-03-01 18:26:15,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:26:15,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:26:15,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:26:15,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:15,706 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:26:15,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464208681] [2022-03-01 18:26:15,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464208681] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:26:15,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123283534] [2022-03-01 18:26:15,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:26:15,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:15,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:26:15,707 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 18:26:15,708 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 18:26:15,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:26:15,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:26:15,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:26:15,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:26:15,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:26:15,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:15,956 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 45 treesize of output 37 [2022-03-01 18:26:15,966 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-01 18:26:15,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 32 [2022-03-01 18:26:15,967 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 21 [2022-03-01 18:26:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:15,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:26:16,304 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:26:16,305 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 46 treesize of output 81 [2022-03-01 18:26:16,338 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:16,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-01 18:26:16,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:16,363 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:16,363 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 97 treesize of output 111 [2022-03-01 18:26:18,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:18,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:18,352 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:18,353 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 45 treesize of output 72 [2022-03-01 18:26:18,386 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:26:18,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-01 18:26:18,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:18,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:18,411 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:18,411 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 65 treesize of output 81 [2022-03-01 18:26:18,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:18,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123283534] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:26:18,787 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:26:18,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 18:26:18,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027129397] [2022-03-01 18:26:18,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:26:18,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:26:18,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:26:18,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:26:18,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:26:18,788 INFO L87 Difference]: Start difference. First operand 5189 states and 17813 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:24,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:26:24,453 INFO L93 Difference]: Finished difference Result 9589 states and 30938 transitions. [2022-03-01 18:26:24,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-01 18:26:24,453 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:26:24,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:26:24,470 INFO L225 Difference]: With dead ends: 9589 [2022-03-01 18:26:24,471 INFO L226 Difference]: Without dead ends: 9535 [2022-03-01 18:26:24,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4215 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1485, Invalid=11397, Unknown=0, NotChecked=0, Total=12882 [2022-03-01 18:26:24,472 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 500 mSDsluCounter, 1203 mSDsCounter, 0 mSdLazyCounter, 3388 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 3611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 3388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:26:24,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 495 Invalid, 3611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 3388 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-01 18:26:24,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9535 states. [2022-03-01 18:26:24,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9535 to 5243. [2022-03-01 18:26:24,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5243 states, 5242 states have (on average 3.4296070202212894) internal successors, (17978), 5242 states have internal predecessors, (17978), 0 states have call successors, (0), 0 states 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 18:26:24,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5243 states to 5243 states and 17978 transitions. [2022-03-01 18:26:24,569 INFO L78 Accepts]: Start accepts. Automaton has 5243 states and 17978 transitions. Word has length 30 [2022-03-01 18:26:24,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:26:24,569 INFO L470 AbstractCegarLoop]: Abstraction has 5243 states and 17978 transitions. [2022-03-01 18:26:24,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:24,570 INFO L276 IsEmpty]: Start isEmpty. Operand 5243 states and 17978 transitions. [2022-03-01 18:26:24,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:26:24,576 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:26:24,576 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, 1, 1, 1, 1] [2022-03-01 18:26:24,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-01 18:26:24,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:24,792 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:26:24,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:26:24,792 INFO L85 PathProgramCache]: Analyzing trace with hash 933428853, now seen corresponding path program 41 times [2022-03-01 18:26:24,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:26:24,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419988130] [2022-03-01 18:26:24,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:26:24,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:26:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:26:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:25,058 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:26:25,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419988130] [2022-03-01 18:26:25,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419988130] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:26:25,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694638184] [2022-03-01 18:26:25,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:26:25,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:25,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:26:25,060 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 18:26:25,060 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 18:26:25,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:26:25,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:26:25,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:26:25,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:26:28,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:26:28,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:28,528 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 50 treesize of output 42 [2022-03-01 18:26:28,541 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-01 18:26:28,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 42 treesize of output 37 [2022-03-01 18:26:28,544 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 21 [2022-03-01 18:26:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:28,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:26:28,891 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:26:28,892 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 45 treesize of output 80 [2022-03-01 18:26:28,919 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:28,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-01 18:26:28,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:28,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:28,953 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 97 treesize of output 111 [2022-03-01 18:26:29,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:29,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:29,888 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:29,888 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 46 treesize of output 73 [2022-03-01 18:26:29,933 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:26:29,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 75 [2022-03-01 18:26:29,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:29,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:29,956 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:29,957 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 65 treesize of output 81 [2022-03-01 18:26:30,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:30,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694638184] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:26:30,356 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:26:30,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 33 [2022-03-01 18:26:30,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712022364] [2022-03-01 18:26:30,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:26:30,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 18:26:30,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:26:30,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 18:26:30,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=921, Unknown=3, NotChecked=0, Total=1056 [2022-03-01 18:26:30,357 INFO L87 Difference]: Start difference. First operand 5243 states and 17978 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 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 18:26:37,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:26:37,373 INFO L93 Difference]: Finished difference Result 9413 states and 30541 transitions. [2022-03-01 18:26:37,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-01 18:26:37,373 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 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 18:26:37,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:26:37,391 INFO L225 Difference]: With dead ends: 9413 [2022-03-01 18:26:37,391 INFO L226 Difference]: Without dead ends: 9344 [2022-03-01 18:26:37,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3540 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=1303, Invalid=9200, Unknown=3, NotChecked=0, Total=10506 [2022-03-01 18:26:37,393 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 423 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 2484 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 2943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 2484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 289 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:26:37,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 477 Invalid, 2943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 2484 Invalid, 0 Unknown, 289 Unchecked, 1.2s Time] [2022-03-01 18:26:37,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9344 states. [2022-03-01 18:26:37,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9344 to 5305. [2022-03-01 18:26:37,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5305 states, 5304 states have (on average 3.427413273001508) internal successors, (18179), 5304 states have internal predecessors, (18179), 0 states have call successors, (0), 0 states 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 18:26:37,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5305 states to 5305 states and 18179 transitions. [2022-03-01 18:26:37,549 INFO L78 Accepts]: Start accepts. Automaton has 5305 states and 18179 transitions. Word has length 30 [2022-03-01 18:26:37,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:26:37,549 INFO L470 AbstractCegarLoop]: Abstraction has 5305 states and 18179 transitions. [2022-03-01 18:26:37,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 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 18:26:37,549 INFO L276 IsEmpty]: Start isEmpty. Operand 5305 states and 18179 transitions. [2022-03-01 18:26:37,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:26:37,556 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:26:37,556 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, 1, 1, 1, 1] [2022-03-01 18:26:37,572 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 18:26:37,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:37,773 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:26:37,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:26:37,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1657395211, now seen corresponding path program 42 times [2022-03-01 18:26:37,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:26:37,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024760262] [2022-03-01 18:26:37,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:26:37,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:26:37,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:26:38,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:38,057 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:26:38,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024760262] [2022-03-01 18:26:38,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024760262] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:26:38,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984716044] [2022-03-01 18:26:38,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:26:38,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:38,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:26:38,059 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 18:26:38,060 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 18:26:38,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:26:38,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:26:38,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:26:38,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:26:38,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:26:38,328 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:38,328 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-03-01 18:26:38,357 INFO L353 Elim1Store]: treesize reduction 41, result has 55.9 percent of original size [2022-03-01 18:26:38,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 39 treesize of output 66 [2022-03-01 18:26:38,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:26:38,364 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:38,364 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 67 treesize of output 63 [2022-03-01 18:26:38,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:38,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:26:38,797 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:26:38,797 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 46 treesize of output 81 [2022-03-01 18:26:38,829 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:38,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-01 18:26:38,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:38,852 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:38,853 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 97 treesize of output 111 [2022-03-01 18:26:40,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:40,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:40,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:40,058 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 45 treesize of output 72 [2022-03-01 18:26:40,091 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:26:40,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-01 18:26:40,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:40,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:40,106 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:40,106 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 65 treesize of output 81 [2022-03-01 18:26:40,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:40,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984716044] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:26:40,340 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:26:40,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 18:26:40,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827657642] [2022-03-01 18:26:40,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:26:40,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:26:40,341 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:26:40,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:26:40,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:26:40,341 INFO L87 Difference]: Start difference. First operand 5305 states and 18179 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 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 18:26:42,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:26:42,720 INFO L93 Difference]: Finished difference Result 9104 states and 29726 transitions. [2022-03-01 18:26:42,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-01 18:26:42,721 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 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 18:26:42,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:26:42,761 INFO L225 Difference]: With dead ends: 9104 [2022-03-01 18:26:42,761 INFO L226 Difference]: Without dead ends: 9045 [2022-03-01 18:26:42,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1812 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=841, Invalid=5321, Unknown=0, NotChecked=0, Total=6162 [2022-03-01 18:26:42,762 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 470 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 2019 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 2166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 2019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:26:42,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 443 Invalid, 2166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 2019 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 18:26:42,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9045 states. [2022-03-01 18:26:42,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9045 to 5313. [2022-03-01 18:26:42,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5313 states, 5312 states have (on average 3.426769578313253) internal successors, (18203), 5312 states have internal predecessors, (18203), 0 states have call successors, (0), 0 states 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 18:26:42,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5313 states to 5313 states and 18203 transitions. [2022-03-01 18:26:42,876 INFO L78 Accepts]: Start accepts. Automaton has 5313 states and 18203 transitions. Word has length 30 [2022-03-01 18:26:42,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:26:42,876 INFO L470 AbstractCegarLoop]: Abstraction has 5313 states and 18203 transitions. [2022-03-01 18:26:42,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 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 18:26:42,877 INFO L276 IsEmpty]: Start isEmpty. Operand 5313 states and 18203 transitions. [2022-03-01 18:26:42,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:26:42,885 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:26:42,885 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, 1, 1, 1, 1] [2022-03-01 18:26:42,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-01 18:26:43,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-03-01 18:26:43,086 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:26:43,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:26:43,090 INFO L85 PathProgramCache]: Analyzing trace with hash 987303649, now seen corresponding path program 43 times [2022-03-01 18:26:43,090 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:26:43,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369384136] [2022-03-01 18:26:43,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:26:43,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:26:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:26:43,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:43,381 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:26:43,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369384136] [2022-03-01 18:26:43,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369384136] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:26:43,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105527935] [2022-03-01 18:26:43,382 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:26:43,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:43,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:26:43,383 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:26:43,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-01 18:26:43,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:26:43,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:26:43,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:26:46,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:26:46,233 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:46,233 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 50 treesize of output 50 [2022-03-01 18:26:46,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:46,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 42 treesize of output 66 [2022-03-01 18:26:46,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:26:46,254 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:46,254 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 67 treesize of output 63 [2022-03-01 18:26:46,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:46,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:26:46,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:46,598 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:46,598 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 45 treesize of output 80 [2022-03-01 18:26:46,626 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:46,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-01 18:26:46,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:46,648 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:46,648 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 97 treesize of output 111 [2022-03-01 18:26:47,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:47,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:47,440 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:47,440 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 46 treesize of output 73 [2022-03-01 18:26:47,487 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:26:47,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 75 [2022-03-01 18:26:47,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:47,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:47,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:47,509 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 65 treesize of output 81 [2022-03-01 18:26:47,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:47,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105527935] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:26:47,884 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:26:47,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-01 18:26:47,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22110026] [2022-03-01 18:26:47,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:26:47,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:26:47,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:26:47,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:26:47,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=737, Unknown=2, NotChecked=0, Total=870 [2022-03-01 18:26:47,885 INFO L87 Difference]: Start difference. First operand 5313 states and 18203 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:56,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:26:56,771 INFO L93 Difference]: Finished difference Result 9470 states and 30254 transitions. [2022-03-01 18:26:56,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-01 18:26:56,772 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:26:56,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:26:56,789 INFO L225 Difference]: With dead ends: 9470 [2022-03-01 18:26:56,789 INFO L226 Difference]: Without dead ends: 9326 [2022-03-01 18:26:56,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2625 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=1276, Invalid=6732, Unknown=2, NotChecked=0, Total=8010 [2022-03-01 18:26:56,790 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 436 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 2033 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 2379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 2033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:26:56,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 403 Invalid, 2379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 2033 Invalid, 0 Unknown, 159 Unchecked, 1.0s Time] [2022-03-01 18:26:56,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9326 states. [2022-03-01 18:26:56,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9326 to 5342. [2022-03-01 18:26:56,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5342 states, 5341 states have (on average 3.4263246583036886) internal successors, (18300), 5341 states have internal predecessors, (18300), 0 states have call successors, (0), 0 states 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 18:26:56,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5342 states to 5342 states and 18300 transitions. [2022-03-01 18:26:56,899 INFO L78 Accepts]: Start accepts. Automaton has 5342 states and 18300 transitions. Word has length 30 [2022-03-01 18:26:56,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:26:56,899 INFO L470 AbstractCegarLoop]: Abstraction has 5342 states and 18300 transitions. [2022-03-01 18:26:56,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:56,899 INFO L276 IsEmpty]: Start isEmpty. Operand 5342 states and 18300 transitions. [2022-03-01 18:26:56,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:26:56,907 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:26:56,907 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, 1, 1, 1, 1] [2022-03-01 18:26:56,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-01 18:26:57,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:57,110 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:26:57,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:26:57,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1044008881, now seen corresponding path program 44 times [2022-03-01 18:26:57,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:26:57,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260612718] [2022-03-01 18:26:57,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:26:57,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:26:57,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:26:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:57,370 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:26:57,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260612718] [2022-03-01 18:26:57,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260612718] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:26:57,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892461332] [2022-03-01 18:26:57,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:26:57,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:57,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:26:57,372 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:26:57,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-01 18:26:57,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:26:57,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:26:57,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:26:57,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:27:00,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:00,101 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:27:00,101 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 43 treesize of output 43 [2022-03-01 18:27:00,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:27:00,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 59 [2022-03-01 18:27:00,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:00,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:27:00,123 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 67 treesize of output 63 [2022-03-01 18:27:00,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:00,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:27:00,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:00,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:27:00,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-03-01 18:27:00,535 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:27:00,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-01 18:27:00,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:00,559 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:27:00,559 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 97 treesize of output 111 [2022-03-01 18:27:01,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:01,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:01,849 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:27:01,849 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 45 treesize of output 72 [2022-03-01 18:27:01,892 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:27:01,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-01 18:27:01,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:01,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:01,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:27:01,914 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 65 treesize of output 81 [2022-03-01 18:27:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:02,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892461332] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:27:02,291 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:27:02,291 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-03-01 18:27:02,291 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062342619] [2022-03-01 18:27:02,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:27:02,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:27:02,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:27:02,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:27:02,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=738, Unknown=2, NotChecked=0, Total=870 [2022-03-01 18:27:02,292 INFO L87 Difference]: Start difference. First operand 5342 states and 18300 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 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 18:27:06,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:27:06,466 INFO L93 Difference]: Finished difference Result 9904 states and 31520 transitions. [2022-03-01 18:27:06,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-01 18:27:06,466 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 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 18:27:06,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:27:06,485 INFO L225 Difference]: With dead ends: 9904 [2022-03-01 18:27:06,485 INFO L226 Difference]: Without dead ends: 9760 [2022-03-01 18:27:06,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2994 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1340, Invalid=7588, Unknown=2, NotChecked=0, Total=8930 [2022-03-01 18:27:06,486 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 492 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 2132 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 2938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 2132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 614 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:27:06,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 483 Invalid, 2938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 2132 Invalid, 0 Unknown, 614 Unchecked, 1.1s Time] [2022-03-01 18:27:06,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9760 states. [2022-03-01 18:27:06,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9760 to 5339. [2022-03-01 18:27:06,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5339 states, 5338 states have (on average 3.4263769201948295) internal successors, (18290), 5338 states have internal predecessors, (18290), 0 states have call successors, (0), 0 states 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 18:27:06,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5339 states to 5339 states and 18290 transitions. [2022-03-01 18:27:06,598 INFO L78 Accepts]: Start accepts. Automaton has 5339 states and 18290 transitions. Word has length 30 [2022-03-01 18:27:06,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:27:06,598 INFO L470 AbstractCegarLoop]: Abstraction has 5339 states and 18290 transitions. [2022-03-01 18:27:06,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 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 18:27:06,598 INFO L276 IsEmpty]: Start isEmpty. Operand 5339 states and 18290 transitions. [2022-03-01 18:27:06,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:27:06,605 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:27:06,605 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, 1, 1, 1, 1] [2022-03-01 18:27:06,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-01 18:27:06,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:06,819 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:27:06,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:27:06,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1597669409, now seen corresponding path program 45 times [2022-03-01 18:27:06,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:27:06,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215681366] [2022-03-01 18:27:06,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:27:06,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:27:06,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:27:07,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:07,123 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:27:07,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215681366] [2022-03-01 18:27:07,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215681366] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:27:07,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810698985] [2022-03-01 18:27:07,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:27:07,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:07,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:27:07,125 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:27:07,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-01 18:27:07,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:27:07,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:27:07,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:27:07,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:27:07,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:07,486 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:27:07,486 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 43 treesize of output 51 [2022-03-01 18:27:07,502 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:27:07,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 59 [2022-03-01 18:27:07,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:07,513 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:27:07,513 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 67 treesize of output 71 [2022-03-01 18:27:07,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:07,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:27:08,065 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:27:08,065 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 84 treesize of output 117 [2022-03-01 18:27:08,099 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:27:08,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 68 treesize of output 111 [2022-03-01 18:27:08,127 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:27:08,127 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 91 treesize of output 115 [2022-03-01 18:27:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:12,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810698985] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:27:12,788 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:27:12,788 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-01 18:27:12,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56463098] [2022-03-01 18:27:12,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:27:12,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:27:12,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:27:12,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:27:12,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:27:12,789 INFO L87 Difference]: Start difference. First operand 5339 states and 18290 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 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 18:27:35,832 WARN L230 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-03-01 18:27:35,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2022-03-01 18:27:35,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 18:27:35,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=657, Invalid=2765, Unknown=0, NotChecked=0, Total=3422 [2022-03-01 18:27:35,834 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 242 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:27:35,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 41 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 560 Invalid, 0 Unknown, 139 Unchecked, 0.3s Time] [2022-03-01 18:27:35,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-01 18:27:36,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-03-01 18:27:36,035 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:620) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:370) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:649) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:184) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:193) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:160) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 56 more [2022-03-01 18:27:36,039 INFO L158 Benchmark]: Toolchain (without parser) took 750368.28ms. Allocated memory was 239.1MB in the beginning and 738.2MB in the end (delta: 499.1MB). Free memory was 198.8MB in the beginning and 583.2MB in the end (delta: -384.3MB). Peak memory consumption was 117.1MB. Max. memory is 8.0GB. [2022-03-01 18:27:36,039 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 239.1MB. Free memory is still 200.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-01 18:27:36,039 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.87ms. Allocated memory is still 239.1MB. Free memory was 198.8MB in the beginning and 197.2MB in the end (delta: 1.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-03-01 18:27:36,039 INFO L158 Benchmark]: Boogie Preprocessor took 24.35ms. Allocated memory is still 239.1MB. Free memory was 197.2MB in the beginning and 196.3MB in the end (delta: 985.6kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-01 18:27:36,039 INFO L158 Benchmark]: RCFGBuilder took 199.87ms. Allocated memory is still 239.1MB. Free memory was 196.2MB in the beginning and 187.2MB in the end (delta: 9.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-01 18:27:36,039 INFO L158 Benchmark]: TraceAbstraction took 750111.87ms. Allocated memory was 239.1MB in the beginning and 738.2MB in the end (delta: 499.1MB). Free memory was 186.7MB in the beginning and 583.2MB in the end (delta: -396.5MB). Peak memory consumption was 103.5MB. Max. memory is 8.0GB. [2022-03-01 18:27:36,040 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11ms. Allocated memory is still 239.1MB. Free memory is still 200.0MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 26.87ms. Allocated memory is still 239.1MB. Free memory was 198.8MB in the beginning and 197.2MB in the end (delta: 1.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 24.35ms. Allocated memory is still 239.1MB. Free memory was 197.2MB in the beginning and 196.3MB in the end (delta: 985.6kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 199.87ms. Allocated memory is still 239.1MB. Free memory was 196.2MB in the beginning and 187.2MB in the end (delta: 9.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 750111.87ms. Allocated memory was 239.1MB in the beginning and 738.2MB in the end (delta: 499.1MB). Free memory was 186.7MB in the beginning and 583.2MB in the end (delta: -396.5MB). Peak memory consumption was 103.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...