/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/ring-nondet.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-03 19:46:51,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 19:46:51,292 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 19:46:51,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-03 19:46:51,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-03 19:46:51,340 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-03 19:46:51,341 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-03 19:46:51,343 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-03 19:46:51,350 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-03 19:46:51,354 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-03 19:46:51,355 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-03 19:46:51,356 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-03 19:46:51,357 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-03 19:46:51,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-03 19:46:51,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-03 19:46:51,361 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-03 19:46:51,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-03 19:46:51,362 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-03 19:46:51,363 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-03 19:46:51,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-03 19:46:51,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-03 19:46:51,369 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-03 19:46:51,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-03 19:46:51,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-03 19:46:51,379 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-03 19:46:51,379 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-03 19:46:51,379 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-03 19:46:51,380 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-03 19:46:51,380 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-03 19:46:51,381 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-03 19:46:51,381 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-03 19:46:51,381 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-03 19:46:51,382 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-03 19:46:51,382 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-03 19:46:51,383 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-03 19:46:51,383 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-03 19:46:51,383 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-03 19:46:51,383 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-03 19:46:51,384 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-03 19:46:51,384 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-03 19:46:51,384 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-03 19:46:51,390 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 [2022-03-03 19:46:51,409 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 19:46:51,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 19:46:51,410 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 19:46:51,410 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 19:46:51,410 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 19:46:51,410 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 19:46:51,411 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 19:46:51,411 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 19:46:51,411 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 19:46:51,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 19:46:51,416 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 19:46:51,416 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 19:46:51,416 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 19:46:51,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 19:46:51,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 19:46:51,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 19:46:51,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 19:46:51,417 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 19:46:51,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 19:46:51,417 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 19:46:51,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 19:46:51,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 19:46:51,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 19:46:51,417 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 19:46:51,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 19:46:51,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:46:51,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 19:46:51,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 19:46:51,418 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 19:46:51,418 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 19:46:51,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 19:46:51,418 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 19:46:51,418 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 19:46:51,419 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 19:46:51,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 19:46:51,595 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 19:46:51,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 19:46:51,597 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 19:46:51,598 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 19:46:51,599 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring-nondet.wvr.bpl [2022-03-03 19:46:51,599 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring-nondet.wvr.bpl' [2022-03-03 19:46:51,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 19:46:51,627 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 19:46:51,628 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 19:46:51,628 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 19:46:51,628 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 19:46:51,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:46:51" (1/1) ... [2022-03-03 19:46:51,653 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:46:51" (1/1) ... [2022-03-03 19:46:51,657 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 19:46:51,658 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 19:46:51,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 19:46:51,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 19:46:51,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 19:46:51,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:46:51" (1/1) ... [2022-03-03 19:46:51,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:46:51" (1/1) ... [2022-03-03 19:46:51,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:46:51" (1/1) ... [2022-03-03 19:46:51,665 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:46:51" (1/1) ... [2022-03-03 19:46:51,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:46:51" (1/1) ... [2022-03-03 19:46:51,669 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:46:51" (1/1) ... [2022-03-03 19:46:51,669 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:46:51" (1/1) ... [2022-03-03 19:46:51,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 19:46:51,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 19:46:51,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 19:46:51,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 19:46:51,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:46:51" (1/1) ... [2022-03-03 19:46:51,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:46:51,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:51,709 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) [2022-03-03 19:46:51,729 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 [2022-03-03 19:46:51,736 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 19:46:51,737 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 19:46:51,737 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 19:46:51,737 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-03 19:46:51,737 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-03 19:46:51,737 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-03 19:46:51,737 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 19:46:51,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 19:46:51,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 19:46:51,738 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-03 19:46:51,738 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-03 19:46:51,738 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-03 19:46:51,739 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-03 19:46:51,775 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 19:46:51,776 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 19:46:51,961 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 19:46:52,011 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 19:46:52,012 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-03 19:46:52,013 INFO L202 PluginConnector]: Adding new model ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:46:52 BoogieIcfgContainer [2022-03-03 19:46:52,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 19:46:52,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 19:46:52,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 19:46:52,027 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 19:46:52,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:46:51" (1/2) ... [2022-03-03 19:46:52,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@607d9abb and model type ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 07:46:52, skipping insertion in model container [2022-03-03 19:46:52,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:46:52" (2/2) ... [2022-03-03 19:46:52,029 INFO L111 eAbstractionObserver]: Analyzing ICFG ring-nondet.wvr.bpl [2022-03-03 19:46:52,032 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 19:46:52,032 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 19:46:52,032 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 19:46:52,032 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 19:46:52,072 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-03 19:46:52,110 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 19:46:52,115 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 [2022-03-03 19:46:52,115 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-03 19:46:52,121 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 33 transitions, 90 flow [2022-03-03 19:46:52,169 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 346 states, 345 states have (on average 2.944927536231884) internal successors, (1016), 345 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:52,177 INFO L276 IsEmpty]: Start isEmpty. Operand has 346 states, 345 states have (on average 2.944927536231884) internal successors, (1016), 345 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:52,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 19:46:52,192 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:52,192 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:52,193 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:52,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:52,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1998239154, now seen corresponding path program 1 times [2022-03-03 19:46:52,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:52,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738574537] [2022-03-03 19:46:52,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:52,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:52,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:52,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:52,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:52,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738574537] [2022-03-03 19:46:52,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738574537] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:46:52,298 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:46:52,298 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-03 19:46:52,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431905909] [2022-03-03 19:46:52,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:46:52,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 19:46:52,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:52,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 19:46:52,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:46:52,322 INFO L87 Difference]: Start difference. First operand has 346 states, 345 states have (on average 2.944927536231884) internal successors, (1016), 345 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:52,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:52,368 INFO L93 Difference]: Finished difference Result 393 states and 1157 transitions. [2022-03-03 19:46:52,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 19:46:52,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-03 19:46:52,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:52,398 INFO L225 Difference]: With dead ends: 393 [2022-03-03 19:46:52,398 INFO L226 Difference]: Without dead ends: 393 [2022-03-03 19:46:52,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:46:52,424 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:52,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 26 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:46:52,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-03-03 19:46:52,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 393. [2022-03-03 19:46:52,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.951530612244898) internal successors, (1157), 392 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:52,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1157 transitions. [2022-03-03 19:46:52,554 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1157 transitions. Word has length 16 [2022-03-03 19:46:52,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:52,555 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 1157 transitions. [2022-03-03 19:46:52,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:52,555 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1157 transitions. [2022-03-03 19:46:52,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:46:52,557 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:52,557 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] [2022-03-03 19:46:52,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 19:46:52,558 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:52,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:52,558 INFO L85 PathProgramCache]: Analyzing trace with hash 492079791, now seen corresponding path program 1 times [2022-03-03 19:46:52,558 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:52,559 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388927922] [2022-03-03 19:46:52,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:52,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:52,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:52,614 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:52,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388927922] [2022-03-03 19:46:52,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388927922] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:46:52,614 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:46:52,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-03 19:46:52,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259547639] [2022-03-03 19:46:52,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:46:52,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 19:46:52,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:52,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 19:46:52,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:46:52,616 INFO L87 Difference]: Start difference. First operand 393 states and 1157 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 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) [2022-03-03 19:46:52,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:52,641 INFO L93 Difference]: Finished difference Result 442 states and 1303 transitions. [2022-03-03 19:46:52,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 19:46:52,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 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 [2022-03-03 19:46:52,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:52,644 INFO L225 Difference]: With dead ends: 442 [2022-03-03 19:46:52,644 INFO L226 Difference]: Without dead ends: 442 [2022-03-03 19:46:52,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:46:52,645 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:52,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:46:52,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-03-03 19:46:52,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2022-03-03 19:46:52,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 2.9546485260770976) internal successors, (1303), 441 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:52,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1303 transitions. [2022-03-03 19:46:52,659 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1303 transitions. Word has length 21 [2022-03-03 19:46:52,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:52,659 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 1303 transitions. [2022-03-03 19:46:52,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 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) [2022-03-03 19:46:52,659 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1303 transitions. [2022-03-03 19:46:52,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:46:52,661 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:52,661 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] [2022-03-03 19:46:52,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-03 19:46:52,662 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:52,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:52,662 INFO L85 PathProgramCache]: Analyzing trace with hash 806798595, now seen corresponding path program 1 times [2022-03-03 19:46:52,662 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:52,662 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938458251] [2022-03-03 19:46:52,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:52,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:52,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:52,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:46:52,730 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:52,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938458251] [2022-03-03 19:46:52,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938458251] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:46:52,731 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:46:52,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-03 19:46:52,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483337952] [2022-03-03 19:46:52,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:46:52,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 19:46:52,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:52,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 19:46:52,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:46:52,732 INFO L87 Difference]: Start difference. First operand 442 states and 1303 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:52,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:52,772 INFO L93 Difference]: Finished difference Result 880 states and 2602 transitions. [2022-03-03 19:46:52,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 19:46:52,772 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 19:46:52,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:52,775 INFO L225 Difference]: With dead ends: 880 [2022-03-03 19:46:52,776 INFO L226 Difference]: Without dead ends: 588 [2022-03-03 19:46:52,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:46:52,777 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:52,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 30 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:46:52,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-03-03 19:46:52,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 515. [2022-03-03 19:46:52,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.9591439688715955) internal successors, (1521), 514 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:52,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1521 transitions. [2022-03-03 19:46:52,796 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1521 transitions. Word has length 26 [2022-03-03 19:46:52,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:52,797 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 1521 transitions. [2022-03-03 19:46:52,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:52,797 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1521 transitions. [2022-03-03 19:46:52,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 19:46:52,799 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:52,799 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, 1] [2022-03-03 19:46:52,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-03 19:46:52,800 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:52,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:52,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1435505509, now seen corresponding path program 1 times [2022-03-03 19:46:52,802 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:52,803 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516401227] [2022-03-03 19:46:52,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:52,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:52,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:52,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:46:52,884 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:52,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516401227] [2022-03-03 19:46:52,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516401227] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:52,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153026712] [2022-03-03 19:46:52,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:52,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:52,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:52,887 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) [2022-03-03 19:46:52,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-03 19:46:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:52,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:46:52,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:53,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:46:53,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:53,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 61 [2022-03-03 19:46:53,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-03-03 19:46:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:46:53,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153026712] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:53,287 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:53,287 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 8 [2022-03-03 19:46:53,287 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897987722] [2022-03-03 19:46:53,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:53,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:46:53,290 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:53,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:46:53,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:46:53,291 INFO L87 Difference]: Start difference. First operand 515 states and 1521 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 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) [2022-03-03 19:46:53,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:53,549 INFO L93 Difference]: Finished difference Result 1649 states and 4903 transitions. [2022-03-03 19:46:53,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:46:53,550 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 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 28 [2022-03-03 19:46:53,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:53,555 INFO L225 Difference]: With dead ends: 1649 [2022-03-03 19:46:53,555 INFO L226 Difference]: Without dead ends: 1033 [2022-03-03 19:46:53,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:46:53,556 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 175 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:53,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 185 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:46:53,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2022-03-03 19:46:53,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 773. [2022-03-03 19:46:53,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 2.966321243523316) internal successors, (2290), 772 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:53,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2290 transitions. [2022-03-03 19:46:53,576 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2290 transitions. Word has length 28 [2022-03-03 19:46:53,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:53,577 INFO L470 AbstractCegarLoop]: Abstraction has 773 states and 2290 transitions. [2022-03-03 19:46:53,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 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) [2022-03-03 19:46:53,577 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2290 transitions. [2022-03-03 19:46:53,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 19:46:53,579 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:53,579 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, 1] [2022-03-03 19:46:53,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:53,792 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 [2022-03-03 19:46:53,793 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:53,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:53,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1406640581, now seen corresponding path program 2 times [2022-03-03 19:46:53,794 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:53,794 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154442604] [2022-03-03 19:46:53,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:53,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:53,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:53,836 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:53,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154442604] [2022-03-03 19:46:53,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154442604] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:46:53,836 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:46:53,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-03 19:46:53,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77482390] [2022-03-03 19:46:53,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:46:53,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 19:46:53,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:53,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 19:46:53,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:46:53,837 INFO L87 Difference]: Start difference. First operand 773 states and 2290 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:53,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:53,855 INFO L93 Difference]: Finished difference Result 616 states and 1811 transitions. [2022-03-03 19:46:53,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 19:46:53,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 19:46:53,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:53,858 INFO L225 Difference]: With dead ends: 616 [2022-03-03 19:46:53,858 INFO L226 Difference]: Without dead ends: 616 [2022-03-03 19:46:53,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:46:53,859 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:53,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 31 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:46:53,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-03-03 19:46:53,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 616. [2022-03-03 19:46:53,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 2.9447154471544716) internal successors, (1811), 615 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:53,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 1811 transitions. [2022-03-03 19:46:53,872 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 1811 transitions. Word has length 28 [2022-03-03 19:46:53,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:53,873 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 1811 transitions. [2022-03-03 19:46:53,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:53,873 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1811 transitions. [2022-03-03 19:46:53,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-03 19:46:53,874 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:53,874 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:53,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-03 19:46:53,875 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:53,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:53,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1436964612, now seen corresponding path program 3 times [2022-03-03 19:46:53,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:53,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424493823] [2022-03-03 19:46:53,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:53,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:53,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:53,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:46:53,964 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:53,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424493823] [2022-03-03 19:46:53,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424493823] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:53,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491565974] [2022-03-03 19:46:53,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:46:53,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:53,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:53,966 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) [2022-03-03 19:46:53,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-03 19:46:54,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:46:54,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:54,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 19:46:54,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:54,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:46:54,213 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:46:54,213 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 53 treesize of output 47 [2022-03-03 19:46:54,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-03 19:46:54,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:54,629 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-03 19:46:54,629 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 70 [2022-03-03 19:46:54,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 55 [2022-03-03 19:46:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-03 19:46:54,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491565974] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:54,672 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:54,672 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 17 [2022-03-03 19:46:54,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274986269] [2022-03-03 19:46:54,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:54,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:46:54,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:54,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:46:54,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:46:54,673 INFO L87 Difference]: Start difference. First operand 616 states and 1811 transitions. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:56,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:56,095 INFO L93 Difference]: Finished difference Result 2902 states and 8623 transitions. [2022-03-03 19:46:56,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 19:46:56,095 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-03 19:46:56,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:56,103 INFO L225 Difference]: With dead ends: 2902 [2022-03-03 19:46:56,103 INFO L226 Difference]: Without dead ends: 1998 [2022-03-03 19:46:56,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1497 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=883, Invalid=3947, Unknown=0, NotChecked=0, Total=4830 [2022-03-03 19:46:56,105 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1175 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1175 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:56,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1175 Valid, 306 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:46:56,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2022-03-03 19:46:56,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1029. [2022-03-03 19:46:56,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 2.9640077821011674) internal successors, (3047), 1028 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:56,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 3047 transitions. [2022-03-03 19:46:56,129 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 3047 transitions. Word has length 35 [2022-03-03 19:46:56,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:56,130 INFO L470 AbstractCegarLoop]: Abstraction has 1029 states and 3047 transitions. [2022-03-03 19:46:56,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:56,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 3047 transitions. [2022-03-03 19:46:56,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-03 19:46:56,132 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:56,132 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:56,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:56,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-03-03 19:46:56,349 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:56,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:56,349 INFO L85 PathProgramCache]: Analyzing trace with hash 899682228, now seen corresponding path program 4 times [2022-03-03 19:46:56,349 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:56,350 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835574115] [2022-03-03 19:46:56,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:56,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:56,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:56,404 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-03 19:46:56,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:56,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835574115] [2022-03-03 19:46:56,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835574115] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:56,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390367590] [2022-03-03 19:46:56,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:46:56,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:56,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:56,406 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) [2022-03-03 19:46:56,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-03 19:46:56,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:46:56,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:56,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:46:56,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:56,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-03 19:46:56,505 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-03 19:46:56,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:56,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 61 [2022-03-03 19:46:56,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-03-03 19:46:56,608 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-03 19:46:56,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390367590] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:56,608 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:56,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 5 [2022-03-03 19:46:56,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654632596] [2022-03-03 19:46:56,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:56,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:46:56,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:56,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:46:56,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:46:56,610 INFO L87 Difference]: Start difference. First operand 1029 states and 3047 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 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) [2022-03-03 19:46:56,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:56,664 INFO L93 Difference]: Finished difference Result 2681 states and 7863 transitions. [2022-03-03 19:46:56,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:46:56,665 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 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 42 [2022-03-03 19:46:56,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:56,674 INFO L225 Difference]: With dead ends: 2681 [2022-03-03 19:46:56,674 INFO L226 Difference]: Without dead ends: 2651 [2022-03-03 19:46:56,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:46:56,675 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 51 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:56,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 83 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:46:56,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2022-03-03 19:46:56,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2233. [2022-03-03 19:46:56,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 2232 states have (on average 3.027329749103943) internal successors, (6757), 2232 states have internal predecessors, (6757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:56,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 6757 transitions. [2022-03-03 19:46:56,721 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 6757 transitions. Word has length 42 [2022-03-03 19:46:56,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:56,722 INFO L470 AbstractCegarLoop]: Abstraction has 2233 states and 6757 transitions. [2022-03-03 19:46:56,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 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) [2022-03-03 19:46:56,722 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 6757 transitions. [2022-03-03 19:46:56,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-03 19:46:56,726 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:56,726 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:56,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:56,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:56,942 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:56,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:56,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1081871720, now seen corresponding path program 5 times [2022-03-03 19:46:56,943 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:56,943 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949734619] [2022-03-03 19:46:56,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:56,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:56,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:57,209 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:57,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949734619] [2022-03-03 19:46:57,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949734619] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:57,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318499019] [2022-03-03 19:46:57,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:46:57,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:57,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:57,210 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) [2022-03-03 19:46:57,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-03 19:46:57,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:46:57,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:57,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:46:57,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:57,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:46:57,716 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-03 19:46:57,716 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 121 treesize of output 99 [2022-03-03 19:46:57,723 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:57,724 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 108 treesize of output 108 [2022-03-03 19:46:58,007 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:58,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:58,471 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:58,472 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 19 treesize of output 23 [2022-03-03 19:46:58,741 INFO L353 Elim1Store]: treesize reduction 24, result has 56.4 percent of original size [2022-03-03 19:46:58,741 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 115 treesize of output 133 [2022-03-03 19:46:58,760 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-03 19:46:58,760 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 110 treesize of output 118 [2022-03-03 19:46:59,132 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:59,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318499019] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:59,132 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:59,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-03-03 19:46:59,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581744505] [2022-03-03 19:46:59,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:59,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 19:46:59,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:59,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 19:46:59,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:46:59,134 INFO L87 Difference]: Start difference. First operand 2233 states and 6757 transitions. Second operand has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:02,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:02,161 INFO L93 Difference]: Finished difference Result 6909 states and 20715 transitions. [2022-03-03 19:47:02,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-03 19:47:02,161 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-03 19:47:02,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:02,181 INFO L225 Difference]: With dead ends: 6909 [2022-03-03 19:47:02,181 INFO L226 Difference]: Without dead ends: 5504 [2022-03-03 19:47:02,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2040 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1420, Invalid=4900, Unknown=0, NotChecked=0, Total=6320 [2022-03-03 19:47:02,184 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 933 mSDsluCounter, 1747 mSDsCounter, 0 mSdLazyCounter, 1825 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 933 SdHoareTripleChecker+Valid, 1474 SdHoareTripleChecker+Invalid, 2000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:02,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [933 Valid, 1474 Invalid, 2000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1825 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-03 19:47:02,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5504 states. [2022-03-03 19:47:02,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5504 to 3165. [2022-03-03 19:47:02,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3165 states, 3164 states have (on average 3.036030341340076) internal successors, (9606), 3164 states have internal predecessors, (9606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:02,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3165 states to 3165 states and 9606 transitions. [2022-03-03 19:47:02,260 INFO L78 Accepts]: Start accepts. Automaton has 3165 states and 9606 transitions. Word has length 42 [2022-03-03 19:47:02,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:02,260 INFO L470 AbstractCegarLoop]: Abstraction has 3165 states and 9606 transitions. [2022-03-03 19:47:02,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:02,261 INFO L276 IsEmpty]: Start isEmpty. Operand 3165 states and 9606 transitions. [2022-03-03 19:47:02,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-03 19:47:02,267 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:02,267 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:02,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:02,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:02,483 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:47:02,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:02,484 INFO L85 PathProgramCache]: Analyzing trace with hash 318436278, now seen corresponding path program 6 times [2022-03-03 19:47:02,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:02,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967585772] [2022-03-03 19:47:02,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:02,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:02,734 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:02,734 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:02,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967585772] [2022-03-03 19:47:02,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967585772] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:02,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599298320] [2022-03-03 19:47:02,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:47:02,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:02,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:02,735 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) [2022-03-03 19:47:02,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-03 19:47:02,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:47:02,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:02,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:47:02,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:03,104 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:47:03,104 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 92 treesize of output 86 [2022-03-03 19:47:03,264 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:47:03,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-03-03 19:47:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:47:03,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:03,840 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:03,840 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 97 treesize of output 101 [2022-03-03 19:47:03,858 INFO L353 Elim1Store]: treesize reduction 38, result has 37.7 percent of original size [2022-03-03 19:47:03,859 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 100 treesize of output 108 [2022-03-03 19:47:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:47:03,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599298320] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:03,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:03,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 11] total 32 [2022-03-03 19:47:03,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886990686] [2022-03-03 19:47:03,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:03,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 19:47:03,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:03,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 19:47:03,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:47:03,951 INFO L87 Difference]: Start difference. First operand 3165 states and 9606 transitions. Second operand has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 32 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:14,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:14,727 INFO L93 Difference]: Finished difference Result 20247 states and 60887 transitions. [2022-03-03 19:47:14,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 271 states. [2022-03-03 19:47:14,728 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 32 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-03 19:47:14,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:14,798 INFO L225 Difference]: With dead ends: 20247 [2022-03-03 19:47:14,798 INFO L226 Difference]: Without dead ends: 18801 [2022-03-03 19:47:14,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42831 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=18579, Invalid=65231, Unknown=0, NotChecked=0, Total=83810 [2022-03-03 19:47:14,809 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 2741 mSDsluCounter, 1554 mSDsCounter, 0 mSdLazyCounter, 3184 mSolverCounterSat, 821 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2741 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 4005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 821 IncrementalHoareTripleChecker+Valid, 3184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:14,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2741 Valid, 1130 Invalid, 4005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [821 Valid, 3184 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-03 19:47:14,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18801 states. [2022-03-03 19:47:15,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18801 to 7666. [2022-03-03 19:47:15,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7666 states, 7665 states have (on average 3.0841487279843443) internal successors, (23640), 7665 states have internal predecessors, (23640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:15,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7666 states to 7666 states and 23640 transitions. [2022-03-03 19:47:15,082 INFO L78 Accepts]: Start accepts. Automaton has 7666 states and 23640 transitions. Word has length 42 [2022-03-03 19:47:15,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:15,084 INFO L470 AbstractCegarLoop]: Abstraction has 7666 states and 23640 transitions. [2022-03-03 19:47:15,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 32 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:15,084 INFO L276 IsEmpty]: Start isEmpty. Operand 7666 states and 23640 transitions. [2022-03-03 19:47:15,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-03 19:47:15,100 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:15,100 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:15,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:15,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:15,310 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:47:15,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:15,310 INFO L85 PathProgramCache]: Analyzing trace with hash -859641656, now seen corresponding path program 7 times [2022-03-03 19:47:15,310 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:15,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524230017] [2022-03-03 19:47:15,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:15,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:15,530 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:15,530 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:15,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524230017] [2022-03-03 19:47:15,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524230017] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:15,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030807240] [2022-03-03 19:47:15,530 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:47:15,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:15,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:15,546 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) [2022-03-03 19:47:15,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-03 19:47:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:15,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:47:15,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:15,997 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:47:15,997 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 92 treesize of output 86 [2022-03-03 19:47:16,126 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-03 19:47:16,127 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 53 treesize of output 39 [2022-03-03 19:47:16,319 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:16,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:16,845 INFO L353 Elim1Store]: treesize reduction 38, result has 37.7 percent of original size [2022-03-03 19:47:16,845 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 104 treesize of output 112 [2022-03-03 19:47:16,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:16,854 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 87 treesize of output 91 [2022-03-03 19:47:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:16,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030807240] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:16,956 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:16,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 11] total 31 [2022-03-03 19:47:16,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966942449] [2022-03-03 19:47:16,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:16,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:47:16,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:16,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:47:16,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:47:16,957 INFO L87 Difference]: Start difference. First operand 7666 states and 23640 transitions. Second operand has 32 states, 32 states have (on average 3.46875) internal successors, (111), 31 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:32,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:32,630 INFO L93 Difference]: Finished difference Result 27028 states and 81557 transitions. [2022-03-03 19:47:32,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 261 states. [2022-03-03 19:47:32,634 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.46875) internal successors, (111), 31 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-03 19:47:32,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:32,699 INFO L225 Difference]: With dead ends: 27028 [2022-03-03 19:47:32,699 INFO L226 Difference]: Without dead ends: 23716 [2022-03-03 19:47:32,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34994 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=14455, Invalid=60347, Unknown=0, NotChecked=0, Total=74802 [2022-03-03 19:47:32,704 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 1855 mSDsluCounter, 2584 mSDsCounter, 0 mSdLazyCounter, 3722 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1855 SdHoareTripleChecker+Valid, 1881 SdHoareTripleChecker+Invalid, 4126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 3722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:32,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1855 Valid, 1881 Invalid, 4126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 3722 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-03 19:47:32,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23716 states. [2022-03-03 19:47:32,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23716 to 7942. [2022-03-03 19:47:32,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7942 states, 7941 states have (on average 3.1081727742097973) internal successors, (24682), 7941 states have internal predecessors, (24682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:33,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7942 states to 7942 states and 24682 transitions. [2022-03-03 19:47:33,016 INFO L78 Accepts]: Start accepts. Automaton has 7942 states and 24682 transitions. Word has length 42 [2022-03-03 19:47:33,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:33,016 INFO L470 AbstractCegarLoop]: Abstraction has 7942 states and 24682 transitions. [2022-03-03 19:47:33,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.46875) internal successors, (111), 31 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:33,017 INFO L276 IsEmpty]: Start isEmpty. Operand 7942 states and 24682 transitions. [2022-03-03 19:47:33,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-03 19:47:33,032 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:33,032 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:33,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-03 19:47:33,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:33,248 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:47:33,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:33,248 INFO L85 PathProgramCache]: Analyzing trace with hash 251639076, now seen corresponding path program 8 times [2022-03-03 19:47:33,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:33,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326093663] [2022-03-03 19:47:33,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:33,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:33,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:33,479 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:33,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326093663] [2022-03-03 19:47:33,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326093663] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:33,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749950697] [2022-03-03 19:47:33,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:47:33,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:33,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:33,480 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) [2022-03-03 19:47:33,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-03 19:47:33,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:47:33,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:33,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:47:33,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:33,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:47:34,026 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:34,026 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 154 treesize of output 142 [2022-03-03 19:47:34,033 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-03 19:47:34,033 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 115 treesize of output 93 [2022-03-03 19:47:34,434 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:34,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:34,962 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:34,962 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 17 treesize of output 21 [2022-03-03 19:47:35,198 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-03 19:47:35,199 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 122 treesize of output 130 [2022-03-03 19:47:35,226 INFO L353 Elim1Store]: treesize reduction 24, result has 56.4 percent of original size [2022-03-03 19:47:35,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 109 treesize of output 127 [2022-03-03 19:47:35,776 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:35,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749950697] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:35,777 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:35,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2022-03-03 19:47:35,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251625481] [2022-03-03 19:47:35,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:35,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 19:47:35,777 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:35,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 19:47:35,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=939, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:47:35,778 INFO L87 Difference]: Start difference. First operand 7942 states and 24682 transitions. Second operand has 35 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 34 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:41,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:41,188 INFO L93 Difference]: Finished difference Result 20315 states and 62151 transitions. [2022-03-03 19:47:41,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-03-03 19:47:41,189 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 34 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-03 19:47:41,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:41,233 INFO L225 Difference]: With dead ends: 20315 [2022-03-03 19:47:41,234 INFO L226 Difference]: Without dead ends: 17396 [2022-03-03 19:47:41,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6856 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3583, Invalid=13973, Unknown=0, NotChecked=0, Total=17556 [2022-03-03 19:47:41,235 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 1205 mSDsluCounter, 1947 mSDsCounter, 0 mSdLazyCounter, 2612 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 1475 SdHoareTripleChecker+Invalid, 2818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:41,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1205 Valid, 1475 Invalid, 2818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2612 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 19:47:41,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17396 states. [2022-03-03 19:47:41,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17396 to 6922. [2022-03-03 19:47:41,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6922 states, 6921 states have (on average 3.072966334344748) internal successors, (21268), 6921 states have internal predecessors, (21268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:41,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6922 states to 6922 states and 21268 transitions. [2022-03-03 19:47:41,398 INFO L78 Accepts]: Start accepts. Automaton has 6922 states and 21268 transitions. Word has length 42 [2022-03-03 19:47:41,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:41,398 INFO L470 AbstractCegarLoop]: Abstraction has 6922 states and 21268 transitions. [2022-03-03 19:47:41,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 34 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:41,398 INFO L276 IsEmpty]: Start isEmpty. Operand 6922 states and 21268 transitions. [2022-03-03 19:47:41,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-03 19:47:41,411 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:41,411 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:41,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:41,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:41,626 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:47:41,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:41,627 INFO L85 PathProgramCache]: Analyzing trace with hash 2004363036, now seen corresponding path program 9 times [2022-03-03 19:47:41,627 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:41,627 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006907452] [2022-03-03 19:47:41,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:41,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:41,813 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:41,813 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:41,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006907452] [2022-03-03 19:47:41,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006907452] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:41,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002245641] [2022-03-03 19:47:41,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:47:41,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:41,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:41,815 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) [2022-03-03 19:47:41,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-03 19:47:41,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 19:47:41,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:41,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 19:47:41,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:42,165 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:47:42,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 86 [2022-03-03 19:47:42,273 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-03 19:47:42,273 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 53 treesize of output 39 [2022-03-03 19:47:42,392 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:47:42,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:42,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:42,919 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 97 treesize of output 101 [2022-03-03 19:47:42,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:42,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:42,936 INFO L353 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-03-03 19:47:42,936 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 100 treesize of output 100 [2022-03-03 19:47:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:47:43,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002245641] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:43,041 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:43,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 11] total 31 [2022-03-03 19:47:43,041 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81696225] [2022-03-03 19:47:43,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:43,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:47:43,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:43,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:47:43,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=787, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:47:43,042 INFO L87 Difference]: Start difference. First operand 6922 states and 21268 transitions. Second operand has 32 states, 32 states have (on average 3.625) internal successors, (116), 31 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:01,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:01,375 INFO L93 Difference]: Finished difference Result 35824 states and 108376 transitions. [2022-03-03 19:48:01,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-03-03 19:48:01,375 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.625) internal successors, (116), 31 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-03 19:48:01,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:01,448 INFO L225 Difference]: With dead ends: 35824 [2022-03-03 19:48:01,448 INFO L226 Difference]: Without dead ends: 33657 [2022-03-03 19:48:01,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 398 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84786 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=32112, Invalid=127488, Unknown=0, NotChecked=0, Total=159600 [2022-03-03 19:48:01,455 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 3017 mSDsluCounter, 2044 mSDsCounter, 0 mSdLazyCounter, 3612 mSolverCounterSat, 806 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3017 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 4418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 806 IncrementalHoareTripleChecker+Valid, 3612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:48:01,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3017 Valid, 1516 Invalid, 4418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [806 Valid, 3612 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-03 19:48:01,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33657 states. [2022-03-03 19:48:01,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33657 to 10798. [2022-03-03 19:48:01,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10798 states, 10797 states have (on average 3.137075113457442) internal successors, (33871), 10797 states have internal predecessors, (33871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:01,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10798 states to 10798 states and 33871 transitions. [2022-03-03 19:48:01,804 INFO L78 Accepts]: Start accepts. Automaton has 10798 states and 33871 transitions. Word has length 42 [2022-03-03 19:48:01,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:01,804 INFO L470 AbstractCegarLoop]: Abstraction has 10798 states and 33871 transitions. [2022-03-03 19:48:01,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.625) internal successors, (116), 31 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:01,804 INFO L276 IsEmpty]: Start isEmpty. Operand 10798 states and 33871 transitions. [2022-03-03 19:48:01,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-03 19:48:01,912 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:01,912 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:01,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-03 19:48:02,129 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,SelfDestructingSolverStorable11 [2022-03-03 19:48:02,129 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:48:02,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:02,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1846831292, now seen corresponding path program 10 times [2022-03-03 19:48:02,130 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:02,130 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289220152] [2022-03-03 19:48:02,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:02,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:02,327 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:02,327 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:02,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289220152] [2022-03-03 19:48:02,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289220152] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:48:02,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507879322] [2022-03-03 19:48:02,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:48:02,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:02,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:48:02,328 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) [2022-03-03 19:48:02,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-03 19:48:02,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:48:02,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:48:02,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:48:02,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:48:02,617 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:48:02,618 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 92 treesize of output 86 [2022-03-03 19:48:02,736 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-03 19:48:02,736 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 53 treesize of output 39 [2022-03-03 19:48:02,971 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:02,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:48:03,526 INFO L353 Elim1Store]: treesize reduction 38, result has 37.7 percent of original size [2022-03-03 19:48:03,526 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 104 treesize of output 112 [2022-03-03 19:48:03,534 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:48:03,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 91 [2022-03-03 19:48:03,620 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:03,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507879322] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:48:03,621 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:48:03,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 11] total 32 [2022-03-03 19:48:03,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784109469] [2022-03-03 19:48:03,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:48:03,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 19:48:03,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:48:03,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 19:48:03,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=840, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:48:03,622 INFO L87 Difference]: Start difference. First operand 10798 states and 33871 transitions. Second operand has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:25,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:25,152 INFO L93 Difference]: Finished difference Result 27482 states and 83508 transitions. [2022-03-03 19:48:25,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 427 states. [2022-03-03 19:48:25,153 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-03 19:48:25,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:25,265 INFO L225 Difference]: With dead ends: 27482 [2022-03-03 19:48:25,265 INFO L226 Difference]: Without dead ends: 25101 [2022-03-03 19:48:25,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 442 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97579 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=31327, Invalid=165365, Unknown=0, NotChecked=0, Total=196692 [2022-03-03 19:48:25,272 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 3310 mSDsluCounter, 2299 mSDsCounter, 0 mSdLazyCounter, 3797 mSolverCounterSat, 859 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3310 SdHoareTripleChecker+Valid, 1652 SdHoareTripleChecker+Invalid, 4656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 859 IncrementalHoareTripleChecker+Valid, 3797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:48:25,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3310 Valid, 1652 Invalid, 4656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [859 Valid, 3797 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-03 19:48:25,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25101 states. [2022-03-03 19:48:25,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25101 to 9862. [2022-03-03 19:48:25,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9862 states, 9861 states have (on average 3.1219957407970793) internal successors, (30786), 9861 states have internal predecessors, (30786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:25,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9862 states to 9862 states and 30786 transitions. [2022-03-03 19:48:25,480 INFO L78 Accepts]: Start accepts. Automaton has 9862 states and 30786 transitions. Word has length 42 [2022-03-03 19:48:25,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:25,480 INFO L470 AbstractCegarLoop]: Abstraction has 9862 states and 30786 transitions. [2022-03-03 19:48:25,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:25,481 INFO L276 IsEmpty]: Start isEmpty. Operand 9862 states and 30786 transitions. [2022-03-03 19:48:25,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-03 19:48:25,495 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:25,495 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:25,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-03 19:48:25,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-03 19:48:25,712 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:48:25,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:25,712 INFO L85 PathProgramCache]: Analyzing trace with hash -287176812, now seen corresponding path program 11 times [2022-03-03 19:48:25,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:25,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664323565] [2022-03-03 19:48:25,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:25,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:25,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:25,967 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:25,967 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:25,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664323565] [2022-03-03 19:48:25,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664323565] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:48:25,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111297452] [2022-03-03 19:48:25,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:48:25,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:25,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:48:25,969 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) [2022-03-03 19:48:25,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-03 19:48:26,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-03 19:48:26,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:48:26,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 19:48:26,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:48:26,077 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:48:26,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-03-03 19:48:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-03 19:48:26,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:48:26,226 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:48:26,226 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 81 treesize of output 101 [2022-03-03 19:48:26,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-03-03 19:48:26,318 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-03 19:48:26,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111297452] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:48:26,318 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:48:26,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7, 7] total 27 [2022-03-03 19:48:26,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143292878] [2022-03-03 19:48:26,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:48:26,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 19:48:26,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:48:26,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 19:48:26,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:48:26,320 INFO L87 Difference]: Start difference. First operand 9862 states and 30786 transitions. Second operand has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:29,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:29,699 INFO L93 Difference]: Finished difference Result 40668 states and 122041 transitions. [2022-03-03 19:48:29,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-03-03 19:48:29,699 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-03 19:48:29,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:29,791 INFO L225 Difference]: With dead ends: 40668 [2022-03-03 19:48:29,791 INFO L226 Difference]: Without dead ends: 40275 [2022-03-03 19:48:29,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9578 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4220, Invalid=19036, Unknown=0, NotChecked=0, Total=23256 [2022-03-03 19:48:29,793 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 1676 mSDsluCounter, 1622 mSDsCounter, 0 mSdLazyCounter, 2346 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1676 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 2824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 2346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:48:29,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1676 Valid, 1199 Invalid, 2824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 2346 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-03 19:48:29,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40275 states. [2022-03-03 19:48:30,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40275 to 10540. [2022-03-03 19:48:30,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10540 states, 10539 states have (on average 3.0748647879305437) internal successors, (32406), 10539 states have internal predecessors, (32406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:30,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10540 states to 10540 states and 32406 transitions. [2022-03-03 19:48:30,200 INFO L78 Accepts]: Start accepts. Automaton has 10540 states and 32406 transitions. Word has length 44 [2022-03-03 19:48:30,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:30,200 INFO L470 AbstractCegarLoop]: Abstraction has 10540 states and 32406 transitions. [2022-03-03 19:48:30,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:30,200 INFO L276 IsEmpty]: Start isEmpty. Operand 10540 states and 32406 transitions. [2022-03-03 19:48:30,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-03 19:48:30,217 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:30,217 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:30,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-03 19:48:30,430 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,SelfDestructingSolverStorable13 [2022-03-03 19:48:30,431 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:48:30,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:30,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1178577320, now seen corresponding path program 12 times [2022-03-03 19:48:30,431 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:30,431 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382126124] [2022-03-03 19:48:30,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:30,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:30,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:30,685 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:30,685 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:30,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382126124] [2022-03-03 19:48:30,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382126124] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:48:30,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74928446] [2022-03-03 19:48:30,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:48:30,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:30,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:48:30,689 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) [2022-03-03 19:48:30,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-03 19:48:30,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:48:30,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:48:30,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 19:48:30,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:48:30,882 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:48:30,882 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 80 treesize of output 74 [2022-03-03 19:48:30,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:30,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:30,971 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-03 19:48:30,972 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 39 treesize of output 30 [2022-03-03 19:48:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:48:31,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:48:31,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 61 [2022-03-03 19:48:31,367 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:48:31,367 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 69 treesize of output 68 [2022-03-03 19:48:31,407 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:48:31,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74928446] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:48:31,408 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:48:31,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 7] total 27 [2022-03-03 19:48:31,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370263986] [2022-03-03 19:48:31,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:48:31,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 19:48:31,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:48:31,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 19:48:31,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:48:31,409 INFO L87 Difference]: Start difference. First operand 10540 states and 32406 transitions. Second operand has 28 states, 28 states have (on average 4.214285714285714) internal successors, (118), 27 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:46,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:46,074 INFO L93 Difference]: Finished difference Result 50637 states and 153811 transitions. [2022-03-03 19:48:46,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 424 states. [2022-03-03 19:48:46,075 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.214285714285714) internal successors, (118), 27 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-03 19:48:46,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:46,180 INFO L225 Difference]: With dead ends: 50637 [2022-03-03 19:48:46,181 INFO L226 Difference]: Without dead ends: 46887 [2022-03-03 19:48:46,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 438 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95200 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=24936, Invalid=168224, Unknown=0, NotChecked=0, Total=193160 [2022-03-03 19:48:46,192 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 2585 mSDsluCounter, 1987 mSDsCounter, 0 mSdLazyCounter, 4432 mSolverCounterSat, 818 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2585 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 5250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 818 IncrementalHoareTripleChecker+Valid, 4432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:48:46,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2585 Valid, 1306 Invalid, 5250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [818 Valid, 4432 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-03 19:48:46,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46887 states. [2022-03-03 19:48:46,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46887 to 11459. [2022-03-03 19:48:46,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11459 states, 11458 states have (on average 3.062925466922674) internal successors, (35095), 11458 states have internal predecessors, (35095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:46,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11459 states to 11459 states and 35095 transitions. [2022-03-03 19:48:46,767 INFO L78 Accepts]: Start accepts. Automaton has 11459 states and 35095 transitions. Word has length 44 [2022-03-03 19:48:46,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:46,768 INFO L470 AbstractCegarLoop]: Abstraction has 11459 states and 35095 transitions. [2022-03-03 19:48:46,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.214285714285714) internal successors, (118), 27 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:46,768 INFO L276 IsEmpty]: Start isEmpty. Operand 11459 states and 35095 transitions. [2022-03-03 19:48:46,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-03 19:48:46,787 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:46,787 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:46,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-03 19:48:47,003 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,SelfDestructingSolverStorable14 [2022-03-03 19:48:47,004 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:48:47,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:47,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1670748072, now seen corresponding path program 13 times [2022-03-03 19:48:47,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:47,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713694223] [2022-03-03 19:48:47,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:47,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:47,048 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-03 19:48:47,049 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:47,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713694223] [2022-03-03 19:48:47,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713694223] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:48:47,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554089449] [2022-03-03 19:48:47,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:48:47,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:47,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:48:47,050 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) [2022-03-03 19:48:47,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-03 19:48:47,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:47,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-03 19:48:47,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:48:47,169 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-03 19:48:47,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:48:47,245 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-03 19:48:47,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554089449] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:48:47,245 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:48:47,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2022-03-03 19:48:47,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617897390] [2022-03-03 19:48:47,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:48:47,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:48:47,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:48:47,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:48:47,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:48:47,246 INFO L87 Difference]: Start difference. First operand 11459 states and 35095 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 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) [2022-03-03 19:48:47,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:47,362 INFO L93 Difference]: Finished difference Result 25716 states and 78317 transitions. [2022-03-03 19:48:47,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:48:47,363 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 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 46 [2022-03-03 19:48:47,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:47,421 INFO L225 Difference]: With dead ends: 25716 [2022-03-03 19:48:47,422 INFO L226 Difference]: Without dead ends: 25682 [2022-03-03 19:48:47,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:48:47,422 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 43 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:48:47,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 83 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:48:47,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25682 states. [2022-03-03 19:48:47,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25682 to 22310. [2022-03-03 19:48:47,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22310 states, 22309 states have (on average 3.1084315747007936) internal successors, (69346), 22309 states have internal predecessors, (69346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:47,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22310 states to 22310 states and 69346 transitions. [2022-03-03 19:48:47,996 INFO L78 Accepts]: Start accepts. Automaton has 22310 states and 69346 transitions. Word has length 46 [2022-03-03 19:48:47,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:47,996 INFO L470 AbstractCegarLoop]: Abstraction has 22310 states and 69346 transitions. [2022-03-03 19:48:47,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 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) [2022-03-03 19:48:47,996 INFO L276 IsEmpty]: Start isEmpty. Operand 22310 states and 69346 transitions. [2022-03-03 19:48:48,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-03 19:48:48,028 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:48,028 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:48,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-03 19:48:48,243 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,SelfDestructingSolverStorable15 [2022-03-03 19:48:48,244 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:48:48,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:48,259 INFO L85 PathProgramCache]: Analyzing trace with hash 912464441, now seen corresponding path program 14 times [2022-03-03 19:48:48,259 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:48,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622429197] [2022-03-03 19:48:48,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:48,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:48,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:48,613 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-03 19:48:48,613 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:48,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622429197] [2022-03-03 19:48:48,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622429197] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:48:48,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849342334] [2022-03-03 19:48:48,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:48:48,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:48,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:48:48,615 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) [2022-03-03 19:48:48,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-03 19:48:48,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:48:48,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:48:48,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 19:48:48,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:48:49,057 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:48:49,058 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 92 treesize of output 86 [2022-03-03 19:48:49,296 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:48:49,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-03-03 19:48:49,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:48:49,385 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:48:49,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:48:49,478 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:48:49,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-03-03 19:48:50,222 INFO L353 Elim1Store]: treesize reduction 28, result has 54.1 percent of original size [2022-03-03 19:48:50,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 126 [2022-03-03 19:48:50,230 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:48:50,231 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 87 treesize of output 91 [2022-03-03 19:48:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:48:50,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849342334] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:48:50,522 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:48:50,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 38 [2022-03-03 19:48:50,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703993269] [2022-03-03 19:48:50,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:48:50,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-03 19:48:50,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:48:50,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-03 19:48:50,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1215, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 19:48:50,524 INFO L87 Difference]: Start difference. First operand 22310 states and 69346 transitions. Second operand has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:55,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:55,635 INFO L93 Difference]: Finished difference Result 58363 states and 177073 transitions. [2022-03-03 19:48:55,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-03-03 19:48:55,635 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-03 19:48:55,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:55,764 INFO L225 Difference]: With dead ends: 58363 [2022-03-03 19:48:55,764 INFO L226 Difference]: Without dead ends: 51234 [2022-03-03 19:48:55,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10776 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5550, Invalid=23180, Unknown=0, NotChecked=0, Total=28730 [2022-03-03 19:48:55,766 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 2375 mSDsluCounter, 1713 mSDsCounter, 0 mSdLazyCounter, 3496 mSolverCounterSat, 609 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2375 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 4105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 609 IncrementalHoareTripleChecker+Valid, 3496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:48:55,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2375 Valid, 1291 Invalid, 4105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [609 Valid, 3496 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 19:48:55,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51234 states. [2022-03-03 19:48:56,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51234 to 25797. [2022-03-03 19:48:56,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25797 states, 25796 states have (on average 3.0408590479144055) internal successors, (78442), 25796 states have internal predecessors, (78442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:56,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25797 states to 25797 states and 78442 transitions. [2022-03-03 19:48:56,733 INFO L78 Accepts]: Start accepts. Automaton has 25797 states and 78442 transitions. Word has length 47 [2022-03-03 19:48:56,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:56,734 INFO L470 AbstractCegarLoop]: Abstraction has 25797 states and 78442 transitions. [2022-03-03 19:48:56,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:56,734 INFO L276 IsEmpty]: Start isEmpty. Operand 25797 states and 78442 transitions. [2022-03-03 19:48:56,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-03 19:48:56,769 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:56,770 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:56,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-03 19:48:56,983 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,SelfDestructingSolverStorable16 [2022-03-03 19:48:56,983 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:48:56,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:56,984 INFO L85 PathProgramCache]: Analyzing trace with hash 189048965, now seen corresponding path program 15 times [2022-03-03 19:48:56,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:56,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190382552] [2022-03-03 19:48:56,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:56,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:56,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-03 19:48:57,220 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:57,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190382552] [2022-03-03 19:48:57,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190382552] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:48:57,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043829308] [2022-03-03 19:48:57,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:48:57,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:57,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:48:57,222 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) [2022-03-03 19:48:57,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-03 19:48:57,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 19:48:57,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:48:57,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-03 19:48:57,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:48:58,091 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:48:58,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 112 [2022-03-03 19:48:58,472 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-03-03 19:48:58,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 111 treesize of output 83 [2022-03-03 19:48:58,941 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:48:58,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-03 19:48:58,979 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:48:58,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:48:59,816 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:48:59,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 61 [2022-03-03 19:49:00,233 INFO L353 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-03-03 19:49:00,233 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 168 treesize of output 180 [2022-03-03 19:49:00,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:00,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:00,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:00,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:00,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:00,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:00,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:00,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:00,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:00,266 INFO L353 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-03-03 19:49:00,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 149 treesize of output 155 [2022-03-03 19:49:01,022 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:49:01,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043829308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:01,022 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:01,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 19] total 48 [2022-03-03 19:49:01,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527014695] [2022-03-03 19:49:01,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:01,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-03 19:49:01,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:01,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-03 19:49:01,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=1812, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 19:49:01,023 INFO L87 Difference]: Start difference. First operand 25797 states and 78442 transitions. Second operand has 49 states, 49 states have (on average 2.693877551020408) internal successors, (132), 48 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:13,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:13,991 INFO L93 Difference]: Finished difference Result 97112 states and 293648 transitions. [2022-03-03 19:49:13,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-03-03 19:49:13,992 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.693877551020408) internal successors, (132), 48 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-03-03 19:49:13,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:14,241 INFO L225 Difference]: With dead ends: 97112 [2022-03-03 19:49:14,242 INFO L226 Difference]: Without dead ends: 84220 [2022-03-03 19:49:14,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27915 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=16169, Invalid=40713, Unknown=0, NotChecked=0, Total=56882 [2022-03-03 19:49:14,244 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 1820 mSDsluCounter, 2720 mSDsCounter, 0 mSdLazyCounter, 5035 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1820 SdHoareTripleChecker+Valid, 2100 SdHoareTripleChecker+Invalid, 5618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 5035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:14,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1820 Valid, 2100 Invalid, 5618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 5035 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-03 19:49:14,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84220 states. [2022-03-03 19:49:15,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84220 to 33391. [2022-03-03 19:49:15,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33391 states, 33390 states have (on average 3.055944893680743) internal successors, (102038), 33390 states have internal predecessors, (102038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:15,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33391 states to 33391 states and 102038 transitions. [2022-03-03 19:49:15,891 INFO L78 Accepts]: Start accepts. Automaton has 33391 states and 102038 transitions. Word has length 49 [2022-03-03 19:49:15,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:15,892 INFO L470 AbstractCegarLoop]: Abstraction has 33391 states and 102038 transitions. [2022-03-03 19:49:15,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.693877551020408) internal successors, (132), 48 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:15,892 INFO L276 IsEmpty]: Start isEmpty. Operand 33391 states and 102038 transitions. [2022-03-03 19:49:15,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-03 19:49:15,951 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:15,951 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:15,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:16,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:16,168 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:16,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:16,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1519631584, now seen corresponding path program 16 times [2022-03-03 19:49:16,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:16,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342595424] [2022-03-03 19:49:16,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:16,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:16,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:16,676 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 2 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:16,676 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:16,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342595424] [2022-03-03 19:49:16,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342595424] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:16,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773625133] [2022-03-03 19:49:16,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:49:16,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:16,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:16,678 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) [2022-03-03 19:49:16,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-03 19:49:16,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:49:16,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:16,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 19:49:16,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:16,954 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:49:16,955 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 88 treesize of output 82 [2022-03-03 19:49:17,044 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:49:17,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-03-03 19:49:17,088 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-03 19:49:17,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:17,481 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:49:17,482 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 96 treesize of output 120 [2022-03-03 19:49:17,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-03-03 19:49:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-03 19:49:17,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773625133] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:17,645 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:17,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 32 [2022-03-03 19:49:17,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240798759] [2022-03-03 19:49:17,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:17,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 19:49:17,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:17,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 19:49:17,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:49:17,647 INFO L87 Difference]: Start difference. First operand 33391 states and 102038 transitions. Second operand has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 32 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:24,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:24,049 INFO L93 Difference]: Finished difference Result 131426 states and 404962 transitions. [2022-03-03 19:49:24,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2022-03-03 19:49:24,049 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 32 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-03-03 19:49:24,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:24,530 INFO L225 Difference]: With dead ends: 131426 [2022-03-03 19:49:24,530 INFO L226 Difference]: Without dead ends: 114464 [2022-03-03 19:49:24,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19124 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=8414, Invalid=35058, Unknown=0, NotChecked=0, Total=43472 [2022-03-03 19:49:24,536 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 1640 mSDsluCounter, 1758 mSDsCounter, 0 mSdLazyCounter, 3058 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1640 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 3559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 3058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:24,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1640 Valid, 1257 Invalid, 3559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 3058 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 19:49:24,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114464 states. [2022-03-03 19:49:25,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114464 to 44522. [2022-03-03 19:49:26,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44522 states, 44521 states have (on average 3.0804564138271826) internal successors, (137145), 44521 states have internal predecessors, (137145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:26,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44522 states to 44522 states and 137145 transitions. [2022-03-03 19:49:26,147 INFO L78 Accepts]: Start accepts. Automaton has 44522 states and 137145 transitions. Word has length 50 [2022-03-03 19:49:26,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:26,147 INFO L470 AbstractCegarLoop]: Abstraction has 44522 states and 137145 transitions. [2022-03-03 19:49:26,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 32 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:26,147 INFO L276 IsEmpty]: Start isEmpty. Operand 44522 states and 137145 transitions. [2022-03-03 19:49:26,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-03 19:49:26,220 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:26,220 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:26,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:26,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:26,430 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:26,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:26,430 INFO L85 PathProgramCache]: Analyzing trace with hash -867515449, now seen corresponding path program 17 times [2022-03-03 19:49:26,430 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:26,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103911945] [2022-03-03 19:49:26,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:26,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:26,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:26,629 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-03 19:49:26,630 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:26,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103911945] [2022-03-03 19:49:26,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103911945] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:26,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149747911] [2022-03-03 19:49:26,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:49:26,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:26,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:26,631 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) [2022-03-03 19:49:26,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-03 19:49:26,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-03 19:49:26,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:26,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:49:26,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:26,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:26,708 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 7 [2022-03-03 19:49:26,755 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-03 19:49:26,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:26,897 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:49:26,897 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 86 treesize of output 90 [2022-03-03 19:49:26,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-03-03 19:49:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-03 19:49:26,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149747911] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:26,939 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:26,939 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 8 [2022-03-03 19:49:26,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101229059] [2022-03-03 19:49:26,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:26,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:49:26,939 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:26,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:49:26,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:49:26,940 INFO L87 Difference]: Start difference. First operand 44522 states and 137145 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:27,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:27,345 INFO L93 Difference]: Finished difference Result 53825 states and 165071 transitions. [2022-03-03 19:49:27,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 19:49:27,345 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-03-03 19:49:27,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:27,489 INFO L225 Difference]: With dead ends: 53825 [2022-03-03 19:49:27,489 INFO L226 Difference]: Without dead ends: 53723 [2022-03-03 19:49:27,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:49:27,490 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 133 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:27,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 159 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:49:27,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53723 states. [2022-03-03 19:49:28,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53723 to 51223. [2022-03-03 19:49:28,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51223 states, 51222 states have (on average 3.0916403108039514) internal successors, (158360), 51222 states have internal predecessors, (158360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:28,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51223 states to 51223 states and 158360 transitions. [2022-03-03 19:49:28,789 INFO L78 Accepts]: Start accepts. Automaton has 51223 states and 158360 transitions. Word has length 51 [2022-03-03 19:49:28,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:28,789 INFO L470 AbstractCegarLoop]: Abstraction has 51223 states and 158360 transitions. [2022-03-03 19:49:28,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:28,789 INFO L276 IsEmpty]: Start isEmpty. Operand 51223 states and 158360 transitions. [2022-03-03 19:49:29,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-03 19:49:29,099 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:29,099 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:29,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:29,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:29,317 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:29,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:29,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1449455409, now seen corresponding path program 18 times [2022-03-03 19:49:29,318 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:29,318 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709318554] [2022-03-03 19:49:29,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:29,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:29,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:29,650 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:29,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:29,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709318554] [2022-03-03 19:49:29,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709318554] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:29,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604618776] [2022-03-03 19:49:29,651 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:49:29,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:29,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:29,652 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) [2022-03-03 19:49:29,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-03 19:49:29,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-03 19:49:29,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:29,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 19:49:29,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:29,878 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-03 19:49:29,879 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 22 treesize of output 10 [2022-03-03 19:49:29,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:49:29,992 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:49:29,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:30,042 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:49:30,042 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 20 [2022-03-03 19:49:30,211 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:49:30,211 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 101 treesize of output 121 [2022-03-03 19:49:30,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-03-03 19:49:30,378 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:49:30,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604618776] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:30,378 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:30,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 11] total 33 [2022-03-03 19:49:30,378 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087426132] [2022-03-03 19:49:30,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:30,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 19:49:30,448 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:30,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 19:49:30,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=977, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:49:30,449 INFO L87 Difference]: Start difference. First operand 51223 states and 158360 transitions. Second operand has 34 states, 34 states have (on average 3.3823529411764706) internal successors, (115), 33 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:58,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:58,222 INFO L93 Difference]: Finished difference Result 170953 states and 518659 transitions. [2022-03-03 19:49:58,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 648 states. [2022-03-03 19:49:58,222 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.3823529411764706) internal successors, (115), 33 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-03-03 19:49:58,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:58,790 INFO L225 Difference]: With dead ends: 170953 [2022-03-03 19:49:58,790 INFO L226 Difference]: Without dead ends: 168633 [2022-03-03 19:49:58,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 751 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 665 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213233 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=40465, Invalid=403757, Unknown=0, NotChecked=0, Total=444222 [2022-03-03 19:49:58,816 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 2139 mSDsluCounter, 8948 mSDsCounter, 0 mSdLazyCounter, 11527 mSolverCounterSat, 618 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2139 SdHoareTripleChecker+Valid, 7126 SdHoareTripleChecker+Invalid, 12145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 618 IncrementalHoareTripleChecker+Valid, 11527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:58,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2139 Valid, 7126 Invalid, 12145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [618 Valid, 11527 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-03-03 19:49:59,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168633 states. [2022-03-03 19:50:01,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168633 to 80389. [2022-03-03 19:50:02,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80389 states, 80388 states have (on average 3.1265984972881524) internal successors, (251341), 80388 states have internal predecessors, (251341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:02,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80389 states to 80389 states and 251341 transitions. [2022-03-03 19:50:02,459 INFO L78 Accepts]: Start accepts. Automaton has 80389 states and 251341 transitions. Word has length 51 [2022-03-03 19:50:02,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:02,459 INFO L470 AbstractCegarLoop]: Abstraction has 80389 states and 251341 transitions. [2022-03-03 19:50:02,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.3823529411764706) internal successors, (115), 33 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:02,460 INFO L276 IsEmpty]: Start isEmpty. Operand 80389 states and 251341 transitions. [2022-03-03 19:50:02,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-03 19:50:02,786 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:02,787 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:02,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:02,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:02,999 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:03,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:03,000 INFO L85 PathProgramCache]: Analyzing trace with hash 786519139, now seen corresponding path program 19 times [2022-03-03 19:50:03,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:03,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246242577] [2022-03-03 19:50:03,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:03,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:03,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:03,380 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:03,380 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:03,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246242577] [2022-03-03 19:50:03,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246242577] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:03,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434407548] [2022-03-03 19:50:03,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:50:03,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:03,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:03,382 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) [2022-03-03 19:50:03,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-03 19:50:03,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:03,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-03 19:50:03,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:03,556 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-03 19:50:03,556 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 22 treesize of output 10 [2022-03-03 19:50:03,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:50:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:50:03,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:03,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:03,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-03 19:50:03,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 61 [2022-03-03 19:50:03,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:03,954 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 87 treesize of output 107 [2022-03-03 19:50:04,106 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:50:04,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434407548] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:04,106 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:04,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 11] total 32 [2022-03-03 19:50:04,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390593831] [2022-03-03 19:50:04,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:04,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 19:50:04,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:04,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 19:50:04,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:50:04,107 INFO L87 Difference]: Start difference. First operand 80389 states and 251341 transitions. Second operand has 33 states, 33 states have (on average 3.484848484848485) internal successors, (115), 32 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:07,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:07,582 INFO L93 Difference]: Finished difference Result 129938 states and 401241 transitions. [2022-03-03 19:50:07,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-03 19:50:07,582 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.484848484848485) internal successors, (115), 32 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-03-03 19:50:07,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:08,158 INFO L225 Difference]: With dead ends: 129938 [2022-03-03 19:50:08,159 INFO L226 Difference]: Without dead ends: 128529 [2022-03-03 19:50:08,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4718 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1692, Invalid=13808, Unknown=0, NotChecked=0, Total=15500 [2022-03-03 19:50:08,161 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 776 mSDsluCounter, 1986 mSDsCounter, 0 mSdLazyCounter, 2944 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 3197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 2944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:08,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [776 Valid, 1484 Invalid, 3197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 2944 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-03 19:50:08,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128529 states. [2022-03-03 19:50:10,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128529 to 82939. [2022-03-03 19:50:10,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82939 states, 82938 states have (on average 3.098278231932287) internal successors, (256965), 82938 states have internal predecessors, (256965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:10,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82939 states to 82939 states and 256965 transitions. [2022-03-03 19:50:10,910 INFO L78 Accepts]: Start accepts. Automaton has 82939 states and 256965 transitions. Word has length 51 [2022-03-03 19:50:10,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:10,910 INFO L470 AbstractCegarLoop]: Abstraction has 82939 states and 256965 transitions. [2022-03-03 19:50:10,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.484848484848485) internal successors, (115), 32 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:10,910 INFO L276 IsEmpty]: Start isEmpty. Operand 82939 states and 256965 transitions. [2022-03-03 19:50:11,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-03 19:50:11,044 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:11,044 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:11,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-03 19:50:11,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:11,260 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:11,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:11,261 INFO L85 PathProgramCache]: Analyzing trace with hash 931116739, now seen corresponding path program 20 times [2022-03-03 19:50:11,261 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:11,261 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354043655] [2022-03-03 19:50:11,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:11,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:11,456 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:50:11,457 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:11,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354043655] [2022-03-03 19:50:11,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354043655] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:11,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131701652] [2022-03-03 19:50:11,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:50:11,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:11,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:11,458 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) [2022-03-03 19:50:11,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-03 19:50:11,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:50:11,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:11,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:50:11,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:11,641 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:50:11,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-03-03 19:50:11,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-03 19:50:11,701 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:50:11,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:11,748 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:11,749 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 20 [2022-03-03 19:50:11,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:11,908 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 89 treesize of output 109 [2022-03-03 19:50:11,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-03-03 19:50:12,151 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:50:12,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131701652] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:12,151 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:12,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 27 [2022-03-03 19:50:12,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860418710] [2022-03-03 19:50:12,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:12,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 19:50:12,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:12,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 19:50:12,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:50:12,152 INFO L87 Difference]: Start difference. First operand 82939 states and 256965 transitions. Second operand has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:14,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:14,294 INFO L93 Difference]: Finished difference Result 139406 states and 427719 transitions. [2022-03-03 19:50:14,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-03 19:50:14,295 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-03-03 19:50:14,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:14,727 INFO L225 Difference]: With dead ends: 139406 [2022-03-03 19:50:14,727 INFO L226 Difference]: Without dead ends: 138710 [2022-03-03 19:50:14,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=454, Invalid=3328, Unknown=0, NotChecked=0, Total=3782 [2022-03-03 19:50:14,727 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 435 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 2257 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 2359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:14,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 1190 Invalid, 2359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2257 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 19:50:14,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138710 states. [2022-03-03 19:50:16,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138710 to 83027. [2022-03-03 19:50:16,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83027 states, 83026 states have (on average 3.0981258882759617) internal successors, (257225), 83026 states have internal predecessors, (257225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:17,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83027 states to 83027 states and 257225 transitions. [2022-03-03 19:50:17,210 INFO L78 Accepts]: Start accepts. Automaton has 83027 states and 257225 transitions. Word has length 51 [2022-03-03 19:50:17,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:17,210 INFO L470 AbstractCegarLoop]: Abstraction has 83027 states and 257225 transitions. [2022-03-03 19:50:17,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:17,211 INFO L276 IsEmpty]: Start isEmpty. Operand 83027 states and 257225 transitions. [2022-03-03 19:50:17,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-03 19:50:17,364 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:17,364 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:17,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:17,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:17,579 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:17,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:17,580 INFO L85 PathProgramCache]: Analyzing trace with hash 741648217, now seen corresponding path program 21 times [2022-03-03 19:50:17,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:17,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652529614] [2022-03-03 19:50:17,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:17,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-03 19:50:17,673 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:17,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652529614] [2022-03-03 19:50:17,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652529614] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:17,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772396660] [2022-03-03 19:50:17,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:50:17,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:17,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:17,674 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) [2022-03-03 19:50:17,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-03 19:50:17,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-03 19:50:17,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:17,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:50:17,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:17,886 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:50:17,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-03-03 19:50:17,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-03 19:50:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:50:18,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:18,126 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:18,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-03-03 19:50:18,604 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:18,604 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 96 treesize of output 112 [2022-03-03 19:50:18,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-03-03 19:50:18,783 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:50:18,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772396660] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:18,783 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:18,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 34 [2022-03-03 19:50:18,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889772754] [2022-03-03 19:50:18,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:18,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 19:50:18,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:18,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 19:50:18,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:50:18,784 INFO L87 Difference]: Start difference. First operand 83027 states and 257225 transitions. Second operand has 35 states, 35 states have (on average 3.4571428571428573) internal successors, (121), 34 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:27,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:27,255 INFO L93 Difference]: Finished difference Result 197704 states and 595244 transitions. [2022-03-03 19:50:27,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 251 states. [2022-03-03 19:50:27,256 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.4571428571428573) internal successors, (121), 34 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-03-03 19:50:27,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:28,153 INFO L225 Difference]: With dead ends: 197704 [2022-03-03 19:50:28,153 INFO L226 Difference]: Without dead ends: 193845 [2022-03-03 19:50:28,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32872 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=8079, Invalid=68373, Unknown=0, NotChecked=0, Total=76452 [2022-03-03 19:50:28,156 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 1964 mSDsluCounter, 3368 mSDsCounter, 0 mSdLazyCounter, 5449 mSolverCounterSat, 624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1964 SdHoareTripleChecker+Valid, 2399 SdHoareTripleChecker+Invalid, 6073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 624 IncrementalHoareTripleChecker+Valid, 5449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:28,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1964 Valid, 2399 Invalid, 6073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [624 Valid, 5449 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-03 19:50:28,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193845 states. [2022-03-03 19:50:30,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193845 to 79515. [2022-03-03 19:50:30,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79515 states, 79514 states have (on average 3.0640390371506903) internal successors, (243634), 79514 states have internal predecessors, (243634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:31,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79515 states to 79515 states and 243634 transitions. [2022-03-03 19:50:31,037 INFO L78 Accepts]: Start accepts. Automaton has 79515 states and 243634 transitions. Word has length 51 [2022-03-03 19:50:31,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:31,037 INFO L470 AbstractCegarLoop]: Abstraction has 79515 states and 243634 transitions. [2022-03-03 19:50:31,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.4571428571428573) internal successors, (121), 34 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:31,037 INFO L276 IsEmpty]: Start isEmpty. Operand 79515 states and 243634 transitions. [2022-03-03 19:50:31,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-03 19:50:31,172 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:31,172 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:31,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-03 19:50:31,388 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,SelfDestructingSolverStorable23 [2022-03-03 19:50:31,388 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:31,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:31,389 INFO L85 PathProgramCache]: Analyzing trace with hash -944128953, now seen corresponding path program 22 times [2022-03-03 19:50:31,389 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:31,389 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999829243] [2022-03-03 19:50:31,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:31,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:31,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:31,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999829243] [2022-03-03 19:50:31,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999829243] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:31,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545489141] [2022-03-03 19:50:31,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:50:31,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:31,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:31,704 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) [2022-03-03 19:50:31,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-03 19:50:31,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:50:31,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:31,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:50:31,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:32,205 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:50:32,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-03-03 19:50:32,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:50:32,328 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 61 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:50:32,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:32,397 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:32,397 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-03 19:50:32,596 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:32,596 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 89 treesize of output 109 [2022-03-03 19:50:32,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-03-03 19:50:32,793 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 58 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:50:32,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545489141] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:32,793 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:32,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 11] total 35 [2022-03-03 19:50:32,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057122571] [2022-03-03 19:50:32,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:32,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-03 19:50:32,794 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:32,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-03 19:50:32,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:50:32,794 INFO L87 Difference]: Start difference. First operand 79515 states and 243634 transitions. Second operand has 36 states, 36 states have (on average 3.4166666666666665) internal successors, (123), 35 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:47,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:47,224 INFO L93 Difference]: Finished difference Result 144721 states and 440668 transitions. [2022-03-03 19:50:47,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 355 states. [2022-03-03 19:50:47,224 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.4166666666666665) internal successors, (123), 35 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-03-03 19:50:47,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:47,686 INFO L225 Difference]: With dead ends: 144721 [2022-03-03 19:50:47,686 INFO L226 Difference]: Without dead ends: 143470 [2022-03-03 19:50:47,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 381 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64962 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=13480, Invalid=132826, Unknown=0, NotChecked=0, Total=146306 [2022-03-03 19:50:47,691 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 1700 mSDsluCounter, 4185 mSDsCounter, 0 mSdLazyCounter, 8783 mSolverCounterSat, 539 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1700 SdHoareTripleChecker+Valid, 3326 SdHoareTripleChecker+Invalid, 9322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 8783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:47,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1700 Valid, 3326 Invalid, 9322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 8783 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-03-03 19:50:48,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143470 states. [2022-03-03 19:50:49,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143470 to 69347. [2022-03-03 19:50:49,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69347 states, 69346 states have (on average 3.0609840509906845) internal successors, (212267), 69346 states have internal predecessors, (212267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:49,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69347 states to 69347 states and 212267 transitions. [2022-03-03 19:50:49,997 INFO L78 Accepts]: Start accepts. Automaton has 69347 states and 212267 transitions. Word has length 55 [2022-03-03 19:50:49,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:49,997 INFO L470 AbstractCegarLoop]: Abstraction has 69347 states and 212267 transitions. [2022-03-03 19:50:49,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.4166666666666665) internal successors, (123), 35 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:49,997 INFO L276 IsEmpty]: Start isEmpty. Operand 69347 states and 212267 transitions. [2022-03-03 19:50:50,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-03 19:50:50,131 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:50,131 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:50,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:50,347 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,SelfDestructingSolverStorable24 [2022-03-03 19:50:50,348 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:50,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:50,351 INFO L85 PathProgramCache]: Analyzing trace with hash -332459897, now seen corresponding path program 23 times [2022-03-03 19:50:50,351 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:50,351 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434555112] [2022-03-03 19:50:50,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:50,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:50,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:50,675 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:50:50,676 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:50,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434555112] [2022-03-03 19:50:50,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434555112] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:50,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125121807] [2022-03-03 19:50:50,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:50:50,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:50,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:50,677 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) [2022-03-03 19:50:50,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-03 19:50:50,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-03 19:50:50,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:50,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 19:50:50,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:51,203 INFO L353 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-03-03 19:50:51,203 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 29 treesize of output 13 [2022-03-03 19:50:51,242 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 27 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-03 19:50:51,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:51,498 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-03-03 19:50:51,499 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 95 treesize of output 105 [2022-03-03 19:50:51,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-03-03 19:50:51,568 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-03 19:50:51,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125121807] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:51,568 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:51,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 8] total 30 [2022-03-03 19:50:51,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435599226] [2022-03-03 19:50:51,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:51,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:50:51,569 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:51,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:50:51,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=733, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:50:51,569 INFO L87 Difference]: Start difference. First operand 69347 states and 212267 transitions. Second operand has 31 states, 31 states have (on average 4.354838709677419) internal successors, (135), 30 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:58,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:58,739 INFO L93 Difference]: Finished difference Result 242363 states and 739180 transitions. [2022-03-03 19:50:58,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-03-03 19:50:58,754 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.354838709677419) internal successors, (135), 30 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-03-03 19:50:58,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:59,839 INFO L225 Difference]: With dead ends: 242363 [2022-03-03 19:50:59,839 INFO L226 Difference]: Without dead ends: 234109 [2022-03-03 19:50:59,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17601 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=8221, Invalid=29999, Unknown=0, NotChecked=0, Total=38220 [2022-03-03 19:50:59,841 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 1905 mSDsluCounter, 2602 mSDsCounter, 0 mSdLazyCounter, 3223 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1905 SdHoareTripleChecker+Valid, 1833 SdHoareTripleChecker+Invalid, 3650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 3223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:59,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1905 Valid, 1833 Invalid, 3650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 3223 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 19:51:00,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234109 states. [2022-03-03 19:51:03,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234109 to 120881. [2022-03-03 19:51:03,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120881 states, 120880 states have (on average 3.071657842488418) internal successors, (371302), 120880 states have internal predecessors, (371302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:04,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120881 states to 120881 states and 371302 transitions. [2022-03-03 19:51:04,430 INFO L78 Accepts]: Start accepts. Automaton has 120881 states and 371302 transitions. Word has length 56 [2022-03-03 19:51:04,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:04,430 INFO L470 AbstractCegarLoop]: Abstraction has 120881 states and 371302 transitions. [2022-03-03 19:51:04,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.354838709677419) internal successors, (135), 30 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:04,431 INFO L276 IsEmpty]: Start isEmpty. Operand 120881 states and 371302 transitions. [2022-03-03 19:51:04,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-03 19:51:04,659 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:04,659 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:04,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:04,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-03 19:51:04,875 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:04,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:04,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1980953451, now seen corresponding path program 24 times [2022-03-03 19:51:04,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:04,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13269475] [2022-03-03 19:51:04,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:04,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:04,999 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:51:04,999 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:04,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13269475] [2022-03-03 19:51:04,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13269475] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:04,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159232887] [2022-03-03 19:51:04,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:51:04,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:05,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:05,001 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) [2022-03-03 19:51:05,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-03 19:51:05,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-03 19:51:05,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:05,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:51:05,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:05,483 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:51:05,483 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 102 treesize of output 92 [2022-03-03 19:51:05,618 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-03 19:51:05,618 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 25 treesize of output 13 [2022-03-03 19:51:05,647 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:05,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:06,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 61 [2022-03-03 19:51:06,262 INFO L353 Elim1Store]: treesize reduction 41, result has 32.8 percent of original size [2022-03-03 19:51:06,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 110 [2022-03-03 19:51:06,339 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 40 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-03 19:51:06,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159232887] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:06,340 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:06,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 31 [2022-03-03 19:51:06,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860327513] [2022-03-03 19:51:06,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:06,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:51:06,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:06,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:51:06,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:51:06,341 INFO L87 Difference]: Start difference. First operand 120881 states and 371302 transitions. Second operand has 32 states, 32 states have (on average 4.25) internal successors, (136), 31 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:13,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:13,408 INFO L93 Difference]: Finished difference Result 414058 states and 1277939 transitions. [2022-03-03 19:51:13,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-03-03 19:51:13,408 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.25) internal successors, (136), 31 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-03-03 19:51:13,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:15,943 INFO L225 Difference]: With dead ends: 414058 [2022-03-03 19:51:15,943 INFO L226 Difference]: Without dead ends: 414058 [2022-03-03 19:51:15,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11922 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5874, Invalid=20858, Unknown=0, NotChecked=0, Total=26732 [2022-03-03 19:51:15,944 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 1541 mSDsluCounter, 2118 mSDsCounter, 0 mSdLazyCounter, 2055 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1541 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 2397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 2055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:15,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1541 Valid, 1590 Invalid, 2397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 2055 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-03 19:51:16,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414058 states. [2022-03-03 19:51:24,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414058 to 213658. [2022-03-03 19:51:24,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213658 states, 213657 states have (on average 3.151158164721961) internal successors, (673267), 213657 states have internal predecessors, (673267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:25,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213658 states to 213658 states and 673267 transitions. [2022-03-03 19:51:25,836 INFO L78 Accepts]: Start accepts. Automaton has 213658 states and 673267 transitions. Word has length 56 [2022-03-03 19:51:25,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:25,836 INFO L470 AbstractCegarLoop]: Abstraction has 213658 states and 673267 transitions. [2022-03-03 19:51:25,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.25) internal successors, (136), 31 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:25,836 INFO L276 IsEmpty]: Start isEmpty. Operand 213658 states and 673267 transitions. [2022-03-03 19:51:26,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-03 19:51:26,217 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:26,217 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:26,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:26,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:26,433 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:26,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:26,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1483575497, now seen corresponding path program 25 times [2022-03-03 19:51:26,435 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:26,435 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666000133] [2022-03-03 19:51:26,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:26,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:26,716 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:51:26,716 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:26,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666000133] [2022-03-03 19:51:26,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666000133] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:26,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120321102] [2022-03-03 19:51:26,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:51:26,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:26,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:26,718 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) [2022-03-03 19:51:26,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-03 19:51:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:26,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:51:26,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:27,307 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:51:27,307 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 92 treesize of output 86 [2022-03-03 19:51:27,478 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-03 19:51:27,478 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 25 treesize of output 13 [2022-03-03 19:51:27,528 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:51:27,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:28,154 INFO L353 Elim1Store]: treesize reduction 58, result has 44.8 percent of original size [2022-03-03 19:51:28,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 119 treesize of output 145 [2022-03-03 19:51:28,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-03-03 19:51:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 18 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:51:28,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120321102] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:28,497 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:28,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 35 [2022-03-03 19:51:28,497 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158005500] [2022-03-03 19:51:28,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:28,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-03 19:51:28,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:28,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-03 19:51:28,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:51:28,498 INFO L87 Difference]: Start difference. First operand 213658 states and 673267 transitions. Second operand has 36 states, 36 states have (on average 4.361111111111111) internal successors, (157), 35 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:58,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:58,005 INFO L93 Difference]: Finished difference Result 687845 states and 2146853 transitions. [2022-03-03 19:51:58,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 641 states. [2022-03-03 19:51:58,005 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.361111111111111) internal successors, (157), 35 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-03-03 19:51:58,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:01,382 INFO L225 Difference]: With dead ends: 687845 [2022-03-03 19:52:01,382 INFO L226 Difference]: Without dead ends: 655736 [2022-03-03 19:52:01,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 761 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 664 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223493 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=52945, Invalid=389945, Unknown=0, NotChecked=0, Total=442890 [2022-03-03 19:52:01,398 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 2920 mSDsluCounter, 3107 mSDsCounter, 0 mSdLazyCounter, 6037 mSolverCounterSat, 982 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2920 SdHoareTripleChecker+Valid, 2275 SdHoareTripleChecker+Invalid, 7019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 982 IncrementalHoareTripleChecker+Valid, 6037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:01,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2920 Valid, 2275 Invalid, 7019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [982 Valid, 6037 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-03 19:52:02,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655736 states. [2022-03-03 19:52:13,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655736 to 253244. [2022-03-03 19:52:13,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253244 states, 253243 states have (on average 3.1467720726732824) internal successors, (796898), 253243 states have internal predecessors, (796898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:14,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253244 states to 253244 states and 796898 transitions. [2022-03-03 19:52:14,953 INFO L78 Accepts]: Start accepts. Automaton has 253244 states and 796898 transitions. Word has length 58 [2022-03-03 19:52:14,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:14,953 INFO L470 AbstractCegarLoop]: Abstraction has 253244 states and 796898 transitions. [2022-03-03 19:52:14,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.361111111111111) internal successors, (157), 35 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:14,954 INFO L276 IsEmpty]: Start isEmpty. Operand 253244 states and 796898 transitions. [2022-03-03 19:52:15,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-03 19:52:15,834 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:15,834 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:15,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:16,047 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,SelfDestructingSolverStorable27 [2022-03-03 19:52:16,047 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:52:16,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:16,048 INFO L85 PathProgramCache]: Analyzing trace with hash 393506375, now seen corresponding path program 26 times [2022-03-03 19:52:16,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:16,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506221560] [2022-03-03 19:52:16,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:16,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:16,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:16,474 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 2 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:52:16,474 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:16,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506221560] [2022-03-03 19:52:16,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506221560] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:16,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818428112] [2022-03-03 19:52:16,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:52:16,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:16,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:16,476 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) [2022-03-03 19:52:16,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-03 19:52:16,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:52:16,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:16,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-03 19:52:16,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:16,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-03 19:52:18,738 INFO L353 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-03-03 19:52:18,738 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 197 treesize of output 203 [2022-03-03 19:52:18,745 INFO L353 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2022-03-03 19:52:18,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 183 treesize of output 129 [2022-03-03 19:52:18,939 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:52:18,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:21,230 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:21,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-03 19:52:22,077 INFO L353 Elim1Store]: treesize reduction 224, result has 24.1 percent of original size [2022-03-03 19:52:22,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 321 treesize of output 333 [2022-03-03 19:52:22,157 INFO L353 Elim1Store]: treesize reduction 160, result has 26.3 percent of original size [2022-03-03 19:52:22,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 271 treesize of output 271 [2022-03-03 19:52:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 2 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:52:27,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818428112] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:27,902 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:27,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 48 [2022-03-03 19:52:27,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703343723] [2022-03-03 19:52:27,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:27,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-03 19:52:27,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:27,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-03 19:52:27,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1847, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 19:52:27,903 INFO L87 Difference]: Start difference. First operand 253244 states and 796898 transitions. Second operand has 49 states, 49 states have (on average 2.7551020408163267) internal successors, (135), 48 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:36,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:36,595 INFO L93 Difference]: Finished difference Result 533549 states and 1682724 transitions. [2022-03-03 19:52:36,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-03 19:52:36,596 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.7551020408163267) internal successors, (135), 48 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-03-03 19:52:36,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:39,359 INFO L225 Difference]: With dead ends: 533549 [2022-03-03 19:52:39,359 INFO L226 Difference]: Without dead ends: 514642 [2022-03-03 19:52:39,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4431 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2850, Invalid=9140, Unknown=0, NotChecked=0, Total=11990 [2022-03-03 19:52:39,364 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 1360 mSDsluCounter, 3276 mSDsCounter, 0 mSdLazyCounter, 3342 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1360 SdHoareTripleChecker+Valid, 2590 SdHoareTripleChecker+Invalid, 3588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 3342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:39,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1360 Valid, 2590 Invalid, 3588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 3342 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-03 19:52:39,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514642 states. [2022-03-03 19:52:48,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514642 to 269198. [2022-03-03 19:52:48,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269198 states, 269197 states have (on average 3.1812241592588326) internal successors, (856376), 269197 states have internal predecessors, (856376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:50,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269198 states to 269198 states and 856376 transitions. [2022-03-03 19:52:50,767 INFO L78 Accepts]: Start accepts. Automaton has 269198 states and 856376 transitions. Word has length 60 [2022-03-03 19:52:50,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:50,767 INFO L470 AbstractCegarLoop]: Abstraction has 269198 states and 856376 transitions. [2022-03-03 19:52:50,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.7551020408163267) internal successors, (135), 48 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:50,767 INFO L276 IsEmpty]: Start isEmpty. Operand 269198 states and 856376 transitions. [2022-03-03 19:52:51,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-03 19:52:51,299 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:51,299 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:51,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:51,514 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,SelfDestructingSolverStorable28 [2022-03-03 19:52:51,515 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:52:51,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:51,515 INFO L85 PathProgramCache]: Analyzing trace with hash -925999780, now seen corresponding path program 27 times [2022-03-03 19:52:51,515 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:51,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281621884] [2022-03-03 19:52:51,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:51,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:51,795 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:52:51,795 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:51,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281621884] [2022-03-03 19:52:51,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281621884] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:51,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754799233] [2022-03-03 19:52:51,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:52:51,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:51,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:51,797 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) [2022-03-03 19:52:51,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-03 19:52:51,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-03 19:52:51,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:51,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 19:52:51,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:52,537 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:52:52,538 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 104 treesize of output 94 [2022-03-03 19:52:52,628 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-03 19:52:52,628 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 25 treesize of output 13 [2022-03-03 19:52:52,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:52:52,672 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:52:52,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:52,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:52,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-03-03 19:52:53,163 INFO L353 Elim1Store]: treesize reduction 26, result has 57.4 percent of original size [2022-03-03 19:52:53,163 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 105 treesize of output 125 [2022-03-03 19:52:53,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-03-03 19:52:53,278 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 1 proven. 73 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:52:53,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754799233] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:53,278 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:53,279 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 16] total 43 [2022-03-03 19:52:53,279 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420169702] [2022-03-03 19:52:53,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:53,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-03 19:52:53,279 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:53,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-03 19:52:53,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1690, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 19:52:53,280 INFO L87 Difference]: Start difference. First operand 269198 states and 856376 transitions. Second operand has 44 states, 44 states have (on average 3.2045454545454546) internal successors, (141), 43 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:34,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:34,224 INFO L93 Difference]: Finished difference Result 1067781 states and 3316648 transitions. [2022-03-03 19:53:34,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 787 states. [2022-03-03 19:53:34,224 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.2045454545454546) internal successors, (141), 43 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-03-03 19:53:34,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:43,056 INFO L225 Difference]: With dead ends: 1067781 [2022-03-03 19:53:43,056 INFO L226 Difference]: Without dead ends: 1046327 [2022-03-03 19:53:43,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 895 GetRequests, 95 SyntacticMatches, 3 SemanticMatches, 797 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302870 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=34104, Invalid=603498, Unknown=0, NotChecked=0, Total=637602 [2022-03-03 19:53:43,101 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 3665 mSDsluCounter, 14357 mSDsCounter, 0 mSdLazyCounter, 14262 mSolverCounterSat, 1346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3665 SdHoareTripleChecker+Valid, 12300 SdHoareTripleChecker+Invalid, 15608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1346 IncrementalHoareTripleChecker+Valid, 14262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:43,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3665 Valid, 12300 Invalid, 15608 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1346 Valid, 14262 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-03-03 19:53:44,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046327 states. [2022-03-03 19:54:13,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046327 to 483292. [2022-03-03 19:54:14,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483292 states, 483291 states have (on average 3.199956134088986) internal successors, (1546510), 483291 states have internal predecessors, (1546510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:18,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483292 states to 483292 states and 1546510 transitions. [2022-03-03 19:54:18,249 INFO L78 Accepts]: Start accepts. Automaton has 483292 states and 1546510 transitions. Word has length 61 [2022-03-03 19:54:18,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:18,251 INFO L470 AbstractCegarLoop]: Abstraction has 483292 states and 1546510 transitions. [2022-03-03 19:54:18,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.2045454545454546) internal successors, (141), 43 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:18,251 INFO L276 IsEmpty]: Start isEmpty. Operand 483292 states and 1546510 transitions. [2022-03-03 19:54:20,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-03 19:54:20,422 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:20,422 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:20,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-03 19:54:20,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:20,623 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:54:20,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:20,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1239501488, now seen corresponding path program 28 times [2022-03-03 19:54:20,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:20,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350115171] [2022-03-03 19:54:20,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:20,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:20,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-03 19:54:21,159 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:21,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350115171] [2022-03-03 19:54:21,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350115171] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:21,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564679005] [2022-03-03 19:54:21,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:54:21,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:21,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:21,184 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) [2022-03-03 19:54:21,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-03 19:54:21,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:54:21,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:21,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-03 19:54:21,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:22,222 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:54:22,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2022-03-03 19:54:22,790 INFO L353 Elim1Store]: treesize reduction 28, result has 58.2 percent of original size [2022-03-03 19:54:22,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 174 treesize of output 190 [2022-03-03 19:54:22,813 INFO L353 Elim1Store]: treesize reduction 93, result has 11.4 percent of original size [2022-03-03 19:54:22,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 220 treesize of output 191 [2022-03-03 19:54:23,105 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-03 19:54:23,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:24,689 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:24,690 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 50 treesize of output 72 [2022-03-03 19:54:25,704 INFO L353 Elim1Store]: treesize reduction 86, result has 43.0 percent of original size [2022-03-03 19:54:25,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 253 treesize of output 283 [2022-03-03 19:54:25,813 INFO L353 Elim1Store]: treesize reduction 118, result has 45.6 percent of original size [2022-03-03 19:54:25,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 214 treesize of output 274 [2022-03-03 19:54:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 5 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-03 19:54:47,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564679005] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:47,789 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:47,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 52 [2022-03-03 19:54:47,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935491360] [2022-03-03 19:54:47,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:47,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-03 19:54:47,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:47,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-03 19:54:47,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=2323, Unknown=0, NotChecked=0, Total=2756 [2022-03-03 19:54:47,790 INFO L87 Difference]: Start difference. First operand 483292 states and 1546510 transitions. Second operand has 53 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 52 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:48,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:48,174 INFO L93 Difference]: Finished difference Result 976867 states and 3078506 transitions. [2022-03-03 19:55:48,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 498 states. [2022-03-03 19:55:48,174 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 52 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-03-03 19:55:48,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:53,880 INFO L225 Difference]: With dead ends: 976867 [2022-03-03 19:55:53,880 INFO L226 Difference]: Without dead ends: 948628 [2022-03-03 19:55:53,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 518 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119346 ImplicationChecksByTransitivity, 46.0s TimeCoverageRelationStatistics Valid=29095, Invalid=240785, Unknown=0, NotChecked=0, Total=269880 [2022-03-03 19:55:53,907 INFO L933 BasicCegarLoop]: 337 mSDtfsCounter, 2152 mSDsluCounter, 9461 mSDsCounter, 0 mSdLazyCounter, 12151 mSolverCounterSat, 542 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2152 SdHoareTripleChecker+Valid, 8049 SdHoareTripleChecker+Invalid, 12693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 542 IncrementalHoareTripleChecker+Valid, 12151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:53,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2152 Valid, 8049 Invalid, 12693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [542 Valid, 12151 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-03-03 19:55:55,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948628 states. [2022-03-03 19:56:17,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948628 to 599828. [2022-03-03 19:56:19,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599828 states, 599827 states have (on average 3.1770427139825315) internal successors, (1905676), 599827 states have internal predecessors, (1905676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)