/usr/bin/java -Xmx16000000000 -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/nonblocking-cntr.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 05:56:05,300 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 05:56:05,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 05:56:05,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-18 05:56:05,373 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-18 05:56:05,374 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-18 05:56:05,375 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-18 05:56:05,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-18 05:56:05,378 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-18 05:56:05,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-18 05:56:05,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-18 05:56:05,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-18 05:56:05,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-18 05:56:05,385 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-18 05:56:05,385 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-18 05:56:05,386 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-18 05:56:05,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-18 05:56:05,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-18 05:56:05,389 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-18 05:56:05,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-18 05:56:05,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-18 05:56:05,392 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-18 05:56:05,392 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-18 05:56:05,393 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-18 05:56:05,396 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-18 05:56:05,396 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-18 05:56:05,396 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-18 05:56:05,397 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-18 05:56:05,397 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-18 05:56:05,398 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-18 05:56:05,398 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-18 05:56:05,398 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-18 05:56:05,399 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-18 05:56:05,399 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-18 05:56:05,400 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-18 05:56:05,400 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-18 05:56:05,401 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-18 05:56:05,401 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-18 05:56:05,401 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 05:56:05,401 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 05:56:05,402 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 05:56:05,408 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 [2022-01-18 05:56:05,433 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 05:56:05,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 05:56:05,434 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 05:56:05,434 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 05:56:05,435 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 05:56:05,435 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 05:56:05,435 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 05:56:05,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 05:56:05,436 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 05:56:05,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 05:56:05,436 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 05:56:05,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 05:56:05,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 05:56:05,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 05:56:05,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 05:56:05,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 05:56:05,437 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 05:56:05,437 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 05:56:05,437 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 05:56:05,437 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 05:56:05,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 05:56:05,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 05:56:05,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 05:56:05,438 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 05:56:05,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 05:56:05,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 05:56:05,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 05:56:05,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 05:56:05,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 05:56:05,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 05:56:05,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 05:56:05,439 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 05:56:05,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 05:56:05,439 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 05:56:05,647 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 05:56:05,679 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 05:56:05,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 05:56:05,682 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 05:56:05,684 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 05:56:05,686 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl [2022-01-18 05:56:05,686 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl' [2022-01-18 05:56:05,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 05:56:05,712 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 05:56:05,713 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 05:56:05,717 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 05:56:05,717 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 05:56:05,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:56:05" (1/1) ... [2022-01-18 05:56:05,749 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:56:05" (1/1) ... [2022-01-18 05:56:05,768 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 05:56:05,770 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 05:56:05,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 05:56:05,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 05:56:05,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 05:56:05,779 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:56:05" (1/1) ... [2022-01-18 05:56:05,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:56:05" (1/1) ... [2022-01-18 05:56:05,780 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:56:05" (1/1) ... [2022-01-18 05:56:05,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:56:05" (1/1) ... [2022-01-18 05:56:05,782 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:56:05" (1/1) ... [2022-01-18 05:56:05,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:56:05" (1/1) ... [2022-01-18 05:56:05,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:56:05" (1/1) ... [2022-01-18 05:56:05,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 05:56:05,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 05:56:05,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 05:56:05,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 05:56:05,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:56:05" (1/1) ... [2022-01-18 05:56:05,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 05:56:05,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:05,832 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) [2022-01-18 05:56:05,848 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 [2022-01-18 05:56:05,860 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 05:56:05,860 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 05:56:05,860 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 05:56:05,860 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 05:56:05,860 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 05:56:05,860 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 05:56:05,861 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 05:56:05,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 05:56:05,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 05:56:05,862 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 05:56:05,893 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 05:56:05,894 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 05:56:05,961 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 05:56:05,970 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 05:56:05,970 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 05:56:05,972 INFO L202 PluginConnector]: Adding new model nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:56:05 BoogieIcfgContainer [2022-01-18 05:56:05,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 05:56:05,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 05:56:05,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 05:56:05,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 05:56:05,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:56:05" (1/2) ... [2022-01-18 05:56:05,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f0c5d7d and model type nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 05:56:05, skipping insertion in model container [2022-01-18 05:56:05,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:56:05" (2/2) ... [2022-01-18 05:56:05,977 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-cntr.wvr.bpl [2022-01-18 05:56:05,980 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 05:56:05,980 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 05:56:05,980 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 05:56:05,980 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 05:56:06,000 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-18 05:56:06,027 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 05:56:06,031 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, 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 [2022-01-18 05:56:06,031 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-18 05:56:06,037 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2022-01-18 05:56:06,049 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:06,060 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:06,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 05:56:06,065 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:06,065 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:06,065 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:56:06,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:06,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1631855703, now seen corresponding path program 1 times [2022-01-18 05:56:06,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:06,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350206256] [2022-01-18 05:56:06,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:06,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:06,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:06,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:06,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350206256] [2022-01-18 05:56:06,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350206256] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:56:06,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:56:06,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 05:56:06,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424242979] [2022-01-18 05:56:06,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:56:06,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 05:56:06,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:06,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 05:56:06,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 05:56:06,284 INFO L87 Difference]: Start difference. First operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:06,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:06,346 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2022-01-18 05:56:06,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:56:06,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 05:56:06,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:06,354 INFO L225 Difference]: With dead ends: 43 [2022-01-18 05:56:06,355 INFO L226 Difference]: Without dead ends: 43 [2022-01-18 05:56:06,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:56:06,358 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 30 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 [2022-01-18 05:56:06,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 30 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:56:06,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-18 05:56:06,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2022-01-18 05:56:06,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:06,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2022-01-18 05:56:06,381 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2022-01-18 05:56:06,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:06,381 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2022-01-18 05:56:06,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:06,381 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2022-01-18 05:56:06,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 05:56:06,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:06,382 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:06,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 05:56:06,382 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:56:06,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:06,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1473491929, now seen corresponding path program 1 times [2022-01-18 05:56:06,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:06,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297854552] [2022-01-18 05:56:06,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:06,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:06,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:56:06,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:06,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297854552] [2022-01-18 05:56:06,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297854552] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:56:06,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:56:06,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 05:56:06,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738464862] [2022-01-18 05:56:06,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:56:06,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:56:06,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:06,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:56:06,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:56:06,477 INFO L87 Difference]: Start difference. First operand 38 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:06,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:06,511 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2022-01-18 05:56:06,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:56:06,528 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 05:56:06,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:06,530 INFO L225 Difference]: With dead ends: 50 [2022-01-18 05:56:06,530 INFO L226 Difference]: Without dead ends: 50 [2022-01-18 05:56:06,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 05:56:06,531 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:06,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 27 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:56:06,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-18 05:56:06,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2022-01-18 05:56:06,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:06,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2022-01-18 05:56:06,537 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2022-01-18 05:56:06,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:06,537 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2022-01-18 05:56:06,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:06,538 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2022-01-18 05:56:06,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 05:56:06,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:06,539 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:06,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 05:56:06,539 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:56:06,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:06,540 INFO L85 PathProgramCache]: Analyzing trace with hash 917506533, now seen corresponding path program 1 times [2022-01-18 05:56:06,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:06,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515160075] [2022-01-18 05:56:06,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:06,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:06,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:06,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:06,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:06,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515160075] [2022-01-18 05:56:06,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515160075] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:06,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615712382] [2022-01-18 05:56:06,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:06,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:06,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:06,638 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) [2022-01-18 05:56:06,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 05:56:06,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:06,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 05:56:06,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:06,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:06,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615712382] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:06,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:06,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 6 [2022-01-18 05:56:06,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385449411] [2022-01-18 05:56:06,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:06,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 05:56:06,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:06,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 05:56:06,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-18 05:56:06,972 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:07,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:07,014 INFO L93 Difference]: Finished difference Result 99 states and 185 transitions. [2022-01-18 05:56:07,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 05:56:07,014 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 05:56:07,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:07,015 INFO L225 Difference]: With dead ends: 99 [2022-01-18 05:56:07,015 INFO L226 Difference]: Without dead ends: 78 [2022-01-18 05:56:07,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-18 05:56:07,016 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:07,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 58 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:56:07,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-18 05:56:07,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2022-01-18 05:56:07,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 58 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:07,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 112 transitions. [2022-01-18 05:56:07,022 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 112 transitions. Word has length 19 [2022-01-18 05:56:07,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:07,022 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 112 transitions. [2022-01-18 05:56:07,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:07,023 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 112 transitions. [2022-01-18 05:56:07,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 05:56:07,023 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:07,023 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:07,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 05:56:07,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:07,240 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:56:07,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:07,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1069238711, now seen corresponding path program 2 times [2022-01-18 05:56:07,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:07,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408327889] [2022-01-18 05:56:07,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:07,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:07,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:07,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:07,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:07,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408327889] [2022-01-18 05:56:07,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408327889] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:07,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193925823] [2022-01-18 05:56:07,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:56:07,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:07,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:07,310 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) [2022-01-18 05:56:07,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 05:56:07,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:56:07,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:07,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 05:56:07,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:07,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:07,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:07,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:07,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193925823] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:07,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:07,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 05:56:07,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857062157] [2022-01-18 05:56:07,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:07,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 05:56:07,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:07,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 05:56:07,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:56:07,554 INFO L87 Difference]: Start difference. First operand 59 states and 112 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:07,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:07,591 INFO L93 Difference]: Finished difference Result 80 states and 151 transitions. [2022-01-18 05:56:07,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 05:56:07,591 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 05:56:07,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:07,592 INFO L225 Difference]: With dead ends: 80 [2022-01-18 05:56:07,592 INFO L226 Difference]: Without dead ends: 77 [2022-01-18 05:56:07,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:56:07,593 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:07,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 59 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:56:07,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-18 05:56:07,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2022-01-18 05:56:07,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 60 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) [2022-01-18 05:56:07,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 116 transitions. [2022-01-18 05:56:07,598 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 116 transitions. Word has length 19 [2022-01-18 05:56:07,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:07,598 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 116 transitions. [2022-01-18 05:56:07,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:07,598 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 116 transitions. [2022-01-18 05:56:07,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:56:07,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:07,599 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:07,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 05:56:07,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-18 05:56:07,815 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:56:07,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:07,815 INFO L85 PathProgramCache]: Analyzing trace with hash 859525155, now seen corresponding path program 3 times [2022-01-18 05:56:07,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:07,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893888857] [2022-01-18 05:56:07,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:07,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:07,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:07,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:07,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:07,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893888857] [2022-01-18 05:56:07,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893888857] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:07,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664506545] [2022-01-18 05:56:07,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:56:07,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:07,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:07,902 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) [2022-01-18 05:56:07,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 05:56:07,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:56:07,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:07,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 05:56:07,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:08,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:08,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:08,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:08,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664506545] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:08,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:08,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 05:56:08,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056570335] [2022-01-18 05:56:08,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:08,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:56:08,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:08,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:56:08,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:56:08,196 INFO L87 Difference]: Start difference. First operand 61 states and 116 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:08,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:08,541 INFO L93 Difference]: Finished difference Result 208 states and 386 transitions. [2022-01-18 05:56:08,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 05:56:08,541 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:56:08,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:08,542 INFO L225 Difference]: With dead ends: 208 [2022-01-18 05:56:08,542 INFO L226 Difference]: Without dead ends: 202 [2022-01-18 05:56:08,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=367, Invalid=893, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 05:56:08,543 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 213 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:08,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 93 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:56:08,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-18 05:56:08,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 90. [2022-01-18 05:56:08,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.033707865168539) internal successors, (181), 89 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:08,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 181 transitions. [2022-01-18 05:56:08,550 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 181 transitions. Word has length 21 [2022-01-18 05:56:08,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:08,551 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 181 transitions. [2022-01-18 05:56:08,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:08,551 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 181 transitions. [2022-01-18 05:56:08,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:56:08,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:08,551 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:08,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 05:56:08,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:08,767 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:56:08,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:08,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1109337493, now seen corresponding path program 4 times [2022-01-18 05:56:08,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:08,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532873674] [2022-01-18 05:56:08,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:08,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:08,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:08,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:08,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532873674] [2022-01-18 05:56:08,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532873674] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:08,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862069238] [2022-01-18 05:56:08,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:56:08,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:08,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:08,842 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) [2022-01-18 05:56:08,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 05:56:08,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:56:08,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:08,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 05:56:08,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:09,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:09,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:09,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862069238] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:09,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:09,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 15 [2022-01-18 05:56:09,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667038750] [2022-01-18 05:56:09,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:09,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:56:09,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:09,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:56:09,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:56:09,130 INFO L87 Difference]: Start difference. First operand 90 states and 181 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:09,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:09,428 INFO L93 Difference]: Finished difference Result 170 states and 325 transitions. [2022-01-18 05:56:09,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 05:56:09,429 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:56:09,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:09,430 INFO L225 Difference]: With dead ends: 170 [2022-01-18 05:56:09,430 INFO L226 Difference]: Without dead ends: 166 [2022-01-18 05:56:09,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:56:09,434 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 136 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:09,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 44 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:56:09,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-01-18 05:56:09,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 92. [2022-01-18 05:56:09,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.010989010989011) internal successors, (183), 91 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:09,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 183 transitions. [2022-01-18 05:56:09,452 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 183 transitions. Word has length 21 [2022-01-18 05:56:09,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:09,452 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 183 transitions. [2022-01-18 05:56:09,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:09,452 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 183 transitions. [2022-01-18 05:56:09,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:56:09,453 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:09,453 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:09,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 05:56:09,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:09,653 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:56:09,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:09,654 INFO L85 PathProgramCache]: Analyzing trace with hash 446728737, now seen corresponding path program 5 times [2022-01-18 05:56:09,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:09,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744202252] [2022-01-18 05:56:09,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:09,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:09,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:09,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:09,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:09,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744202252] [2022-01-18 05:56:09,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744202252] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:09,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336099881] [2022-01-18 05:56:09,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:56:09,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:09,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:09,760 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) [2022-01-18 05:56:09,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 05:56:09,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:56:09,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:09,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 05:56:09,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:09,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:09,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:10,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:10,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336099881] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:10,013 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:10,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 7] total 9 [2022-01-18 05:56:10,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81014434] [2022-01-18 05:56:10,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:10,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 05:56:10,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:10,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 05:56:10,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-01-18 05:56:10,014 INFO L87 Difference]: Start difference. First operand 92 states and 183 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:10,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:10,058 INFO L93 Difference]: Finished difference Result 190 states and 376 transitions. [2022-01-18 05:56:10,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:56:10,058 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:56:10,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:10,059 INFO L225 Difference]: With dead ends: 190 [2022-01-18 05:56:10,059 INFO L226 Difference]: Without dead ends: 163 [2022-01-18 05:56:10,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-01-18 05:56:10,059 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 50 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:10,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 103 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:56:10,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-18 05:56:10,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 120. [2022-01-18 05:56:10,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0840336134453783) internal successors, (248), 119 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:10,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 248 transitions. [2022-01-18 05:56:10,063 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 248 transitions. Word has length 23 [2022-01-18 05:56:10,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:10,063 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 248 transitions. [2022-01-18 05:56:10,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:10,064 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 248 transitions. [2022-01-18 05:56:10,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:56:10,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:10,064 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:10,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-18 05:56:10,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:10,265 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:56:10,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:10,266 INFO L85 PathProgramCache]: Analyzing trace with hash -948358029, now seen corresponding path program 6 times [2022-01-18 05:56:10,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:10,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721204696] [2022-01-18 05:56:10,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:10,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:10,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:10,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:10,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721204696] [2022-01-18 05:56:10,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721204696] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:10,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266950651] [2022-01-18 05:56:10,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:56:10,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:10,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:10,392 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) [2022-01-18 05:56:10,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 05:56:10,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 05:56:10,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:10,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 05:56:10,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:10,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:10,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:10,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:10,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266950651] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:10,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:10,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:56:10,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348200632] [2022-01-18 05:56:10,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:10,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:56:10,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:10,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:56:10,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:56:10,929 INFO L87 Difference]: Start difference. First operand 120 states and 248 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2022-01-18 05:56:12,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:12,434 INFO L93 Difference]: Finished difference Result 529 states and 1017 transitions. [2022-01-18 05:56:12,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 05:56:12,434 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 23 [2022-01-18 05:56:12,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:12,437 INFO L225 Difference]: With dead ends: 529 [2022-01-18 05:56:12,437 INFO L226 Difference]: Without dead ends: 493 [2022-01-18 05:56:12,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=948, Invalid=2834, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 05:56:12,439 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 324 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:12,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 130 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:56:12,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-01-18 05:56:12,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 207. [2022-01-18 05:56:12,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.150485436893204) internal successors, (443), 206 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:12,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 443 transitions. [2022-01-18 05:56:12,448 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 443 transitions. Word has length 23 [2022-01-18 05:56:12,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:12,449 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 443 transitions. [2022-01-18 05:56:12,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2022-01-18 05:56:12,449 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 443 transitions. [2022-01-18 05:56:12,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:56:12,450 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:12,450 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:12,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-18 05:56:12,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:12,672 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:56:12,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:12,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1017367007, now seen corresponding path program 7 times [2022-01-18 05:56:12,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:12,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239577313] [2022-01-18 05:56:12,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:12,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:12,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:12,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:12,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239577313] [2022-01-18 05:56:12,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239577313] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:12,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002395237] [2022-01-18 05:56:12,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:56:12,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:12,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:12,752 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) [2022-01-18 05:56:12,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 05:56:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:12,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 05:56:12,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:12,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:12,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:13,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:13,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002395237] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:13,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:13,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-01-18 05:56:13,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902590719] [2022-01-18 05:56:13,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:13,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:56:13,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:13,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:56:13,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:56:13,194 INFO L87 Difference]: Start difference. First operand 207 states and 443 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:13,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:13,476 INFO L93 Difference]: Finished difference Result 415 states and 857 transitions. [2022-01-18 05:56:13,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 05:56:13,476 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:56:13,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:13,478 INFO L225 Difference]: With dead ends: 415 [2022-01-18 05:56:13,478 INFO L226 Difference]: Without dead ends: 411 [2022-01-18 05:56:13,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=864, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 05:56:13,479 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 229 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:13,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 67 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:56:13,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-01-18 05:56:13,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 259. [2022-01-18 05:56:13,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.197674418604651) internal successors, (567), 258 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:13,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 567 transitions. [2022-01-18 05:56:13,489 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 567 transitions. Word has length 23 [2022-01-18 05:56:13,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:13,489 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 567 transitions. [2022-01-18 05:56:13,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:13,489 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 567 transitions. [2022-01-18 05:56:13,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 05:56:13,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:13,491 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:13,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-18 05:56:13,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:13,705 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:56:13,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:13,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1216183969, now seen corresponding path program 8 times [2022-01-18 05:56:13,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:13,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665725723] [2022-01-18 05:56:13,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:13,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:13,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:13,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:13,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665725723] [2022-01-18 05:56:13,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665725723] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:13,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132406399] [2022-01-18 05:56:13,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:56:13,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:13,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:13,813 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) [2022-01-18 05:56:13,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 05:56:13,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:56:13,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:13,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 05:56:13,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:13,996 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:13,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:14,141 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:14,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132406399] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:14,141 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:14,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 24 [2022-01-18 05:56:14,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243281518] [2022-01-18 05:56:14,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:14,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 05:56:14,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:14,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 05:56:14,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:56:14,143 INFO L87 Difference]: Start difference. First operand 259 states and 567 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:14,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:14,626 INFO L93 Difference]: Finished difference Result 574 states and 1166 transitions. [2022-01-18 05:56:14,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 05:56:14,626 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 05:56:14,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:14,629 INFO L225 Difference]: With dead ends: 574 [2022-01-18 05:56:14,629 INFO L226 Difference]: Without dead ends: 553 [2022-01-18 05:56:14,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=769, Invalid=2201, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 05:56:14,630 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 199 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:14,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 132 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:56:14,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-01-18 05:56:14,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 235. [2022-01-18 05:56:14,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.1709401709401708) internal successors, (508), 234 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:14,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 508 transitions. [2022-01-18 05:56:14,639 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 508 transitions. Word has length 25 [2022-01-18 05:56:14,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:14,639 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 508 transitions. [2022-01-18 05:56:14,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:14,639 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 508 transitions. [2022-01-18 05:56:14,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 05:56:14,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:14,640 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:14,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-18 05:56:14,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-18 05:56:14,856 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:56:14,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:14,856 INFO L85 PathProgramCache]: Analyzing trace with hash -580006123, now seen corresponding path program 9 times [2022-01-18 05:56:14,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:14,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720413275] [2022-01-18 05:56:14,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:14,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:14,934 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:14,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:14,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720413275] [2022-01-18 05:56:14,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720413275] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:14,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088536598] [2022-01-18 05:56:14,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:56:14,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:14,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:14,936 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) [2022-01-18 05:56:14,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 05:56:14,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 05:56:14,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:14,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 05:56:14,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:15,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:15,426 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:15,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088536598] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:15,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:15,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 9] total 20 [2022-01-18 05:56:15,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088973891] [2022-01-18 05:56:15,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:15,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:56:15,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:15,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:56:15,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:56:15,428 INFO L87 Difference]: Start difference. First operand 235 states and 508 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:15,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:15,875 INFO L93 Difference]: Finished difference Result 389 states and 796 transitions. [2022-01-18 05:56:15,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 05:56:15,875 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 05:56:15,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:15,877 INFO L225 Difference]: With dead ends: 389 [2022-01-18 05:56:15,877 INFO L226 Difference]: Without dead ends: 385 [2022-01-18 05:56:15,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=549, Invalid=1343, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 05:56:15,878 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 212 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:15,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 43 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:56:15,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-01-18 05:56:15,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 235. [2022-01-18 05:56:15,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.1666666666666665) internal successors, (507), 234 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:15,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 507 transitions. [2022-01-18 05:56:15,886 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 507 transitions. Word has length 25 [2022-01-18 05:56:15,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:15,886 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 507 transitions. [2022-01-18 05:56:15,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:15,886 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 507 transitions. [2022-01-18 05:56:15,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 05:56:15,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:15,887 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:15,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 05:56:16,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:16,112 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:56:16,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:16,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1444914083, now seen corresponding path program 10 times [2022-01-18 05:56:16,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:16,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37712791] [2022-01-18 05:56:16,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:16,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:16,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:16,213 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:16,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:16,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37712791] [2022-01-18 05:56:16,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37712791] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:16,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869920581] [2022-01-18 05:56:16,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:56:16,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:16,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:16,215 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:56:16,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 05:56:16,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:56:16,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:16,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 05:56:16,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:16,337 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:16,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:16,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:16,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869920581] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:16,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:16,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 9] total 12 [2022-01-18 05:56:16,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241152790] [2022-01-18 05:56:16,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:16,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 05:56:16,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:16,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 05:56:16,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-01-18 05:56:16,454 INFO L87 Difference]: Start difference. First operand 235 states and 507 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 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) [2022-01-18 05:56:16,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:16,501 INFO L93 Difference]: Finished difference Result 428 states and 902 transitions. [2022-01-18 05:56:16,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 05:56:16,501 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 05:56:16,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:16,502 INFO L225 Difference]: With dead ends: 428 [2022-01-18 05:56:16,502 INFO L226 Difference]: Without dead ends: 395 [2022-01-18 05:56:16,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-01-18 05:56:16,503 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 101 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:16,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 151 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:56:16,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-01-18 05:56:16,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 313. [2022-01-18 05:56:16,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.217948717948718) internal successors, (692), 312 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:16,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 692 transitions. [2022-01-18 05:56:16,510 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 692 transitions. Word has length 27 [2022-01-18 05:56:16,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:16,510 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 692 transitions. [2022-01-18 05:56:16,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 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) [2022-01-18 05:56:16,510 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 692 transitions. [2022-01-18 05:56:16,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 05:56:16,510 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:16,511 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:16,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 05:56:16,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-18 05:56:16,727 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:56:16,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:16,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1020645679, now seen corresponding path program 11 times [2022-01-18 05:56:16,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:16,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444294369] [2022-01-18 05:56:16,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:16,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:16,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:16,890 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:16,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:16,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444294369] [2022-01-18 05:56:16,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444294369] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:16,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587484968] [2022-01-18 05:56:16,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:56:16,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:16,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:16,900 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) [2022-01-18 05:56:16,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 05:56:16,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 05:56:16,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:16,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 05:56:16,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:17,296 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:17,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:17,765 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:17,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587484968] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:17,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:17,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2022-01-18 05:56:17,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83913830] [2022-01-18 05:56:17,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:17,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:56:17,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:17,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:56:17,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:56:17,767 INFO L87 Difference]: Start difference. First operand 313 states and 692 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:20,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:20,489 INFO L93 Difference]: Finished difference Result 1070 states and 2162 transitions. [2022-01-18 05:56:20,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 05:56:20,489 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 05:56:20,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:20,492 INFO L225 Difference]: With dead ends: 1070 [2022-01-18 05:56:20,493 INFO L226 Difference]: Without dead ends: 989 [2022-01-18 05:56:20,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2262 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1613, Invalid=5193, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 05:56:20,494 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 474 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:20,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 209 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:56:20,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-01-18 05:56:20,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 448. [2022-01-18 05:56:20,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 2.1834451901565997) internal successors, (976), 447 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:20,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 976 transitions. [2022-01-18 05:56:20,507 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 976 transitions. Word has length 27 [2022-01-18 05:56:20,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:20,507 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 976 transitions. [2022-01-18 05:56:20,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:20,507 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 976 transitions. [2022-01-18 05:56:20,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 05:56:20,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:20,508 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:20,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 05:56:20,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-18 05:56:20,724 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:56:20,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:20,724 INFO L85 PathProgramCache]: Analyzing trace with hash 275669725, now seen corresponding path program 12 times [2022-01-18 05:56:20,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:20,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162721669] [2022-01-18 05:56:20,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:20,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:20,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:20,822 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:20,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:20,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162721669] [2022-01-18 05:56:20,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162721669] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:20,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844577905] [2022-01-18 05:56:20,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:56:20,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:20,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:20,824 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) [2022-01-18 05:56:20,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 05:56:20,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-18 05:56:20,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:20,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:56:20,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:21,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:21,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844577905] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:21,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:21,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-01-18 05:56:21,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476996695] [2022-01-18 05:56:21,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:21,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:56:21,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:21,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:56:21,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:56:21,423 INFO L87 Difference]: Start difference. First operand 448 states and 976 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:22,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:22,436 INFO L93 Difference]: Finished difference Result 1546 states and 3357 transitions. [2022-01-18 05:56:22,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 05:56:22,436 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 05:56:22,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:22,442 INFO L225 Difference]: With dead ends: 1546 [2022-01-18 05:56:22,442 INFO L226 Difference]: Without dead ends: 1536 [2022-01-18 05:56:22,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1059, Invalid=2973, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 05:56:22,444 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 248 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:22,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 123 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:56:22,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2022-01-18 05:56:22,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 546. [2022-01-18 05:56:22,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 2.2605504587155965) internal successors, (1232), 545 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:22,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1232 transitions. [2022-01-18 05:56:22,469 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1232 transitions. Word has length 27 [2022-01-18 05:56:22,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:22,469 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 1232 transitions. [2022-01-18 05:56:22,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:22,470 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1232 transitions. [2022-01-18 05:56:22,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:56:22,471 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:22,471 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:22,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 05:56:22,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-18 05:56:22,676 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:56:22,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:22,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1973910373, now seen corresponding path program 13 times [2022-01-18 05:56:22,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:22,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602837028] [2022-01-18 05:56:22,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:22,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:22,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:22,814 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:22,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:22,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602837028] [2022-01-18 05:56:22,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602837028] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:22,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642380854] [2022-01-18 05:56:22,814 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:56:22,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:22,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:22,816 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) [2022-01-18 05:56:22,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 05:56:22,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:22,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:56:22,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:23,060 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:23,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:23,294 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:23,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642380854] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:23,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:23,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 30 [2022-01-18 05:56:23,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557827125] [2022-01-18 05:56:23,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:23,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:56:23,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:23,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:56:23,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=731, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:56:23,296 INFO L87 Difference]: Start difference. First operand 546 states and 1232 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:24,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:24,332 INFO L93 Difference]: Finished difference Result 1098 states and 2300 transitions. [2022-01-18 05:56:24,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 05:56:24,333 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:56:24,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:24,337 INFO L225 Difference]: With dead ends: 1098 [2022-01-18 05:56:24,337 INFO L226 Difference]: Without dead ends: 1035 [2022-01-18 05:56:24,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1432, Invalid=4268, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 05:56:24,339 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 273 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:24,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 174 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:56:24,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2022-01-18 05:56:24,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 503. [2022-01-18 05:56:24,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.256972111553785) internal successors, (1133), 502 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:24,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1133 transitions. [2022-01-18 05:56:24,358 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1133 transitions. Word has length 29 [2022-01-18 05:56:24,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:24,358 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 1133 transitions. [2022-01-18 05:56:24,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:24,358 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1133 transitions. [2022-01-18 05:56:24,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:56:24,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:24,359 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:24,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-18 05:56:24,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-18 05:56:24,575 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:56:24,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:24,576 INFO L85 PathProgramCache]: Analyzing trace with hash 592333205, now seen corresponding path program 14 times [2022-01-18 05:56:24,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:24,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724745808] [2022-01-18 05:56:24,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:24,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:24,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:24,657 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:24,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:24,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724745808] [2022-01-18 05:56:24,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724745808] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:24,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020651230] [2022-01-18 05:56:24,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:56:24,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:24,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:24,658 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) [2022-01-18 05:56:24,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 05:56:24,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:56:24,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:24,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 05:56:24,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:24,996 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:24,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:25,336 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:25,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020651230] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:25,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:25,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 11] total 25 [2022-01-18 05:56:25,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370995131] [2022-01-18 05:56:25,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:25,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 05:56:25,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:25,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 05:56:25,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:56:25,337 INFO L87 Difference]: Start difference. First operand 503 states and 1133 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:26,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:26,079 INFO L93 Difference]: Finished difference Result 753 states and 1609 transitions. [2022-01-18 05:56:26,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 05:56:26,080 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:56:26,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:26,083 INFO L225 Difference]: With dead ends: 753 [2022-01-18 05:56:26,083 INFO L226 Difference]: Without dead ends: 749 [2022-01-18 05:56:26,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=992, Invalid=2548, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 05:56:26,084 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 175 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:26,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 84 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:56:26,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-01-18 05:56:26,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 503. [2022-01-18 05:56:26,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.254980079681275) internal successors, (1132), 502 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:26,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1132 transitions. [2022-01-18 05:56:26,099 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1132 transitions. Word has length 29 [2022-01-18 05:56:26,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:26,099 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 1132 transitions. [2022-01-18 05:56:26,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:26,100 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1132 transitions. [2022-01-18 05:56:26,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 05:56:26,101 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:26,102 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:26,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 05:56:26,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:26,326 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:56:26,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:26,327 INFO L85 PathProgramCache]: Analyzing trace with hash -224049671, now seen corresponding path program 15 times [2022-01-18 05:56:26,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:26,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688761693] [2022-01-18 05:56:26,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:26,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:26,445 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:26,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:26,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688761693] [2022-01-18 05:56:26,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688761693] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:26,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892711250] [2022-01-18 05:56:26,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:56:26,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:26,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:26,446 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) [2022-01-18 05:56:26,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 05:56:26,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 05:56:26,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:26,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:56:26,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:26,763 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:26,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:27,149 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:27,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892711250] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:27,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:27,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 15] total 36 [2022-01-18 05:56:27,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196115708] [2022-01-18 05:56:27,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:27,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 05:56:27,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:27,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 05:56:27,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1055, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 05:56:27,152 INFO L87 Difference]: Start difference. First operand 503 states and 1132 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:28,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:28,900 INFO L93 Difference]: Finished difference Result 2242 states and 4712 transitions. [2022-01-18 05:56:28,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-18 05:56:28,901 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 05:56:28,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:28,907 INFO L225 Difference]: With dead ends: 2242 [2022-01-18 05:56:28,907 INFO L226 Difference]: Without dead ends: 2141 [2022-01-18 05:56:28,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6873 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3989, Invalid=13041, Unknown=0, NotChecked=0, Total=17030 [2022-01-18 05:56:28,911 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 779 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:28,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [779 Valid, 354 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:56:28,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2022-01-18 05:56:28,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 828. [2022-01-18 05:56:28,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 2.2781136638452235) internal successors, (1884), 827 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:28,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1884 transitions. [2022-01-18 05:56:28,932 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1884 transitions. Word has length 29 [2022-01-18 05:56:28,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:28,933 INFO L470 AbstractCegarLoop]: Abstraction has 828 states and 1884 transitions. [2022-01-18 05:56:28,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:28,933 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1884 transitions. [2022-01-18 05:56:28,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 05:56:28,934 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:28,934 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:28,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-01-18 05:56:29,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-18 05:56:29,154 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:56:29,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:29,154 INFO L85 PathProgramCache]: Analyzing trace with hash 524451993, now seen corresponding path program 16 times [2022-01-18 05:56:29,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:29,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820213154] [2022-01-18 05:56:29,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:29,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:29,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:29,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820213154] [2022-01-18 05:56:29,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820213154] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:29,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681397864] [2022-01-18 05:56:29,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:56:29,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:29,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:29,273 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) [2022-01-18 05:56:29,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 05:56:29,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:56:29,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:29,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 05:56:29,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:29,391 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:29,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:29,720 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:29,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681397864] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:29,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:29,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 11] total 15 [2022-01-18 05:56:29,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843731783] [2022-01-18 05:56:29,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:29,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:56:29,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:29,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:56:29,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:56:29,721 INFO L87 Difference]: Start difference. First operand 828 states and 1884 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:29,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:29,801 INFO L93 Difference]: Finished difference Result 1335 states and 3045 transitions. [2022-01-18 05:56:29,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 05:56:29,801 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 05:56:29,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:29,805 INFO L225 Difference]: With dead ends: 1335 [2022-01-18 05:56:29,805 INFO L226 Difference]: Without dead ends: 1296 [2022-01-18 05:56:29,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:56:29,805 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 160 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:29,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 228 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:56:29,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2022-01-18 05:56:29,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 1137. [2022-01-18 05:56:29,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 2.3107394366197185) internal successors, (2625), 1136 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:29,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 2625 transitions. [2022-01-18 05:56:29,822 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 2625 transitions. Word has length 31 [2022-01-18 05:56:29,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:29,822 INFO L470 AbstractCegarLoop]: Abstraction has 1137 states and 2625 transitions. [2022-01-18 05:56:29,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:29,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 2625 transitions. [2022-01-18 05:56:29,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 05:56:29,824 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:29,824 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:29,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 05:56:30,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 05:56:30,039 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:56:30,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:30,040 INFO L85 PathProgramCache]: Analyzing trace with hash -2075385877, now seen corresponding path program 17 times [2022-01-18 05:56:30,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:30,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977079544] [2022-01-18 05:56:30,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:30,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:30,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:30,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:30,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977079544] [2022-01-18 05:56:30,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977079544] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:30,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470701174] [2022-01-18 05:56:30,224 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:56:30,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:30,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:30,225 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) [2022-01-18 05:56:30,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 05:56:30,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 05:56:30,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:30,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:56:30,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:30,516 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:30,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:31,192 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:31,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470701174] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:31,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:31,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2022-01-18 05:56:31,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183920086] [2022-01-18 05:56:31,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:31,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 05:56:31,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:31,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 05:56:31,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 05:56:31,197 INFO L87 Difference]: Start difference. First operand 1137 states and 2625 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:35,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:35,569 INFO L93 Difference]: Finished difference Result 2543 states and 5521 transitions. [2022-01-18 05:56:35,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 05:56:35,570 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 05:56:35,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:35,576 INFO L225 Difference]: With dead ends: 2543 [2022-01-18 05:56:35,576 INFO L226 Difference]: Without dead ends: 2402 [2022-01-18 05:56:35,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3588 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2373, Invalid=8133, Unknown=0, NotChecked=0, Total=10506 [2022-01-18 05:56:35,579 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 560 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:35,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 339 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:56:35,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2022-01-18 05:56:35,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 1423. [2022-01-18 05:56:35,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1423 states, 1422 states have (on average 2.2623066104078764) internal successors, (3217), 1422 states have internal predecessors, (3217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:35,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 3217 transitions. [2022-01-18 05:56:35,612 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 3217 transitions. Word has length 31 [2022-01-18 05:56:35,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:35,612 INFO L470 AbstractCegarLoop]: Abstraction has 1423 states and 3217 transitions. [2022-01-18 05:56:35,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:35,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 3217 transitions. [2022-01-18 05:56:35,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 05:56:35,614 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:35,614 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:35,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-01-18 05:56:35,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:35,833 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:56:35,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:35,834 INFO L85 PathProgramCache]: Analyzing trace with hash 410403225, now seen corresponding path program 18 times [2022-01-18 05:56:35,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:35,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614392855] [2022-01-18 05:56:35,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:35,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:35,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:35,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:35,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614392855] [2022-01-18 05:56:35,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614392855] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:35,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062791585] [2022-01-18 05:56:35,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:56:35,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:35,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:35,960 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) [2022-01-18 05:56:35,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 05:56:35,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-18 05:56:35,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:35,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 05:56:35,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:36,151 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:36,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:36,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062791585] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:36,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:36,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 31 [2022-01-18 05:56:36,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126929453] [2022-01-18 05:56:36,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:36,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:56:36,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:36,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:56:36,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=756, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:56:36,569 INFO L87 Difference]: Start difference. First operand 1423 states and 3217 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:37,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:37,815 INFO L93 Difference]: Finished difference Result 3227 states and 7200 transitions. [2022-01-18 05:56:37,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 05:56:37,816 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 05:56:37,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:37,824 INFO L225 Difference]: With dead ends: 3227 [2022-01-18 05:56:37,824 INFO L226 Difference]: Without dead ends: 3219 [2022-01-18 05:56:37,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2063 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1631, Invalid=4689, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 05:56:37,825 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 447 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:37,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 165 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:56:37,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3219 states. [2022-01-18 05:56:37,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3219 to 1442. [2022-01-18 05:56:37,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 2.2873004857737684) internal successors, (3296), 1441 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:37,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 3296 transitions. [2022-01-18 05:56:37,849 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 3296 transitions. Word has length 31 [2022-01-18 05:56:37,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:37,849 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 3296 transitions. [2022-01-18 05:56:37,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:37,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 3296 transitions. [2022-01-18 05:56:37,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 05:56:37,851 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:37,851 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:37,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 05:56:38,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:38,064 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:56:38,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:38,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1802444585, now seen corresponding path program 19 times [2022-01-18 05:56:38,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:38,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509227904] [2022-01-18 05:56:38,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:38,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:38,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:38,162 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:38,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:38,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509227904] [2022-01-18 05:56:38,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509227904] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:38,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672457895] [2022-01-18 05:56:38,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:56:38,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:38,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:38,163 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) [2022-01-18 05:56:38,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 05:56:38,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:38,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:56:38,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:38,457 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:38,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:38,750 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:38,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672457895] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:38,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:38,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 32 [2022-01-18 05:56:38,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653705187] [2022-01-18 05:56:38,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:38,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:56:38,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:38,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:56:38,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=805, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:56:38,752 INFO L87 Difference]: Start difference. First operand 1442 states and 3296 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:39,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:39,731 INFO L93 Difference]: Finished difference Result 2321 states and 5141 transitions. [2022-01-18 05:56:39,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 05:56:39,731 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 05:56:39,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:39,737 INFO L225 Difference]: With dead ends: 2321 [2022-01-18 05:56:39,737 INFO L226 Difference]: Without dead ends: 2313 [2022-01-18 05:56:39,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1957 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1719, Invalid=4761, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 05:56:39,740 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 388 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:39,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 126 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:56:39,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2022-01-18 05:56:39,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 1166. [2022-01-18 05:56:39,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 1165 states have (on average 2.2643776824034334) internal successors, (2638), 1165 states have internal predecessors, (2638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:39,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 2638 transitions. [2022-01-18 05:56:39,771 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 2638 transitions. Word has length 31 [2022-01-18 05:56:39,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:39,771 INFO L470 AbstractCegarLoop]: Abstraction has 1166 states and 2638 transitions. [2022-01-18 05:56:39,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:39,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 2638 transitions. [2022-01-18 05:56:39,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:56:39,773 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:39,773 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:39,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 05:56:39,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:39,988 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:56:39,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:39,988 INFO L85 PathProgramCache]: Analyzing trace with hash 986733015, now seen corresponding path program 20 times [2022-01-18 05:56:39,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:39,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675034525] [2022-01-18 05:56:39,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:39,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:39,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:40,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:40,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675034525] [2022-01-18 05:56:40,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675034525] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:40,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660740103] [2022-01-18 05:56:40,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:56:40,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:40,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:40,107 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) [2022-01-18 05:56:40,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 05:56:40,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:56:40,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:40,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 05:56:40,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:40,365 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:40,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:40,713 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:40,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660740103] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:40,714 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:40,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 36 [2022-01-18 05:56:40,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126231954] [2022-01-18 05:56:40,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:40,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 05:56:40,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:40,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 05:56:40,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1057, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 05:56:40,715 INFO L87 Difference]: Start difference. First operand 1166 states and 2638 transitions. Second operand has 37 states, 37 states have (on average 2.324324324324324) internal successors, (86), 36 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:41,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:41,957 INFO L93 Difference]: Finished difference Result 2121 states and 4524 transitions. [2022-01-18 05:56:41,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 05:56:41,958 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.324324324324324) internal successors, (86), 36 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:56:41,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:41,970 INFO L225 Difference]: With dead ends: 2121 [2022-01-18 05:56:41,970 INFO L226 Difference]: Without dead ends: 1995 [2022-01-18 05:56:41,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2991 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2447, Invalid=7453, Unknown=0, NotChecked=0, Total=9900 [2022-01-18 05:56:41,973 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 359 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:41,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 174 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:56:41,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2022-01-18 05:56:41,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1115. [2022-01-18 05:56:42,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1114 states have (on average 2.2594254937163374) internal successors, (2517), 1114 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:42,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 2517 transitions. [2022-01-18 05:56:42,002 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 2517 transitions. Word has length 33 [2022-01-18 05:56:42,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:42,002 INFO L470 AbstractCegarLoop]: Abstraction has 1115 states and 2517 transitions. [2022-01-18 05:56:42,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.324324324324324) internal successors, (86), 36 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:42,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 2517 transitions. [2022-01-18 05:56:42,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 05:56:42,003 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:42,004 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:42,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 05:56:42,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-01-18 05:56:42,219 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:56:42,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:42,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1374694123, now seen corresponding path program 21 times [2022-01-18 05:56:42,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:42,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136193463] [2022-01-18 05:56:42,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:42,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:42,288 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:42,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:42,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136193463] [2022-01-18 05:56:42,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136193463] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:42,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256696360] [2022-01-18 05:56:42,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:56:42,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:42,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:42,291 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) [2022-01-18 05:56:42,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 05:56:42,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-18 05:56:42,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:42,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:56:42,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:42,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:42,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256696360] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:42,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:42,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 14] total 32 [2022-01-18 05:56:42,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116056446] [2022-01-18 05:56:42,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:42,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:56:42,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:42,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:56:42,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=789, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:56:42,910 INFO L87 Difference]: Start difference. First operand 1115 states and 2517 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:44,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:44,120 INFO L93 Difference]: Finished difference Result 1545 states and 3349 transitions. [2022-01-18 05:56:44,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 05:56:44,121 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 05:56:44,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:44,124 INFO L225 Difference]: With dead ends: 1545 [2022-01-18 05:56:44,124 INFO L226 Difference]: Without dead ends: 1541 [2022-01-18 05:56:44,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3225 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2764, Invalid=7538, Unknown=0, NotChecked=0, Total=10302 [2022-01-18 05:56:44,127 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 264 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:44,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 89 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:56:44,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2022-01-18 05:56:44,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 1115. [2022-01-18 05:56:44,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1114 states have (on average 2.258527827648115) internal successors, (2516), 1114 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:44,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 2516 transitions. [2022-01-18 05:56:44,147 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 2516 transitions. Word has length 33 [2022-01-18 05:56:44,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:44,148 INFO L470 AbstractCegarLoop]: Abstraction has 1115 states and 2516 transitions. [2022-01-18 05:56:44,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:44,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 2516 transitions. [2022-01-18 05:56:44,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 05:56:44,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:44,151 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:44,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 05:56:44,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-18 05:56:44,368 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:56:44,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:44,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1860569387, now seen corresponding path program 22 times [2022-01-18 05:56:44,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:44,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728789708] [2022-01-18 05:56:44,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:44,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:44,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:44,467 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:44,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:44,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728789708] [2022-01-18 05:56:44,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728789708] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:44,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921420694] [2022-01-18 05:56:44,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:56:44,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:44,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:44,468 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) [2022-01-18 05:56:44,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 05:56:44,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:56:44,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:44,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 05:56:44,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:44,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:44,780 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:44,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921420694] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:44,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:44,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 13] total 18 [2022-01-18 05:56:44,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923217876] [2022-01-18 05:56:44,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:44,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:56:44,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:44,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:56:44,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:56:44,781 INFO L87 Difference]: Start difference. First operand 1115 states and 2516 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:44,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:44,862 INFO L93 Difference]: Finished difference Result 1715 states and 3869 transitions. [2022-01-18 05:56:44,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:56:44,862 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 05:56:44,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:44,865 INFO L225 Difference]: With dead ends: 1715 [2022-01-18 05:56:44,865 INFO L226 Difference]: Without dead ends: 1670 [2022-01-18 05:56:44,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:56:44,867 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 129 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:44,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 349 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:56:44,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2022-01-18 05:56:44,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1471. [2022-01-18 05:56:44,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 2.314965986394558) internal successors, (3403), 1470 states have internal predecessors, (3403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:44,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 3403 transitions. [2022-01-18 05:56:44,887 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 3403 transitions. Word has length 35 [2022-01-18 05:56:44,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:44,887 INFO L470 AbstractCegarLoop]: Abstraction has 1471 states and 3403 transitions. [2022-01-18 05:56:44,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:44,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 3403 transitions. [2022-01-18 05:56:44,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 05:56:44,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:44,889 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:44,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 05:56:45,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:45,104 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:56:45,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:45,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1814617945, now seen corresponding path program 23 times [2022-01-18 05:56:45,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:45,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516920787] [2022-01-18 05:56:45,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:45,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:45,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:45,320 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:45,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:45,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516920787] [2022-01-18 05:56:45,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516920787] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:45,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715967413] [2022-01-18 05:56:45,320 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:56:45,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:45,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:45,321 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) [2022-01-18 05:56:45,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 05:56:45,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-18 05:56:45,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:45,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 05:56:45,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:45,658 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:45,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:46,907 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:46,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715967413] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:46,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:46,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-01-18 05:56:46,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125026615] [2022-01-18 05:56:46,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:46,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 05:56:46,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:46,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 05:56:46,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 05:56:46,909 INFO L87 Difference]: Start difference. First operand 1471 states and 3403 transitions. Second operand has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 40 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:54,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:54,097 INFO L93 Difference]: Finished difference Result 3304 states and 7063 transitions. [2022-01-18 05:56:54,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-18 05:56:54,097 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 40 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 05:56:54,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:54,102 INFO L225 Difference]: With dead ends: 3304 [2022-01-18 05:56:54,102 INFO L226 Difference]: Without dead ends: 3031 [2022-01-18 05:56:54,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=3270, Invalid=11736, Unknown=0, NotChecked=0, Total=15006 [2022-01-18 05:56:54,111 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 669 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 1671 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 1671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:54,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 435 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 1671 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 05:56:54,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3031 states. [2022-01-18 05:56:54,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3031 to 1747. [2022-01-18 05:56:54,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 2.2262313860252005) internal successors, (3887), 1746 states have internal predecessors, (3887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:54,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 3887 transitions. [2022-01-18 05:56:54,169 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 3887 transitions. Word has length 35 [2022-01-18 05:56:54,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:54,169 INFO L470 AbstractCegarLoop]: Abstraction has 1747 states and 3887 transitions. [2022-01-18 05:56:54,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 40 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:54,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 3887 transitions. [2022-01-18 05:56:54,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 05:56:54,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:54,172 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:54,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 05:56:54,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:54,403 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:56:54,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:54,403 INFO L85 PathProgramCache]: Analyzing trace with hash 175034965, now seen corresponding path program 24 times [2022-01-18 05:56:54,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:54,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604948646] [2022-01-18 05:56:54,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:54,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:54,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:54,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604948646] [2022-01-18 05:56:54,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604948646] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:54,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965954073] [2022-01-18 05:56:54,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:56:54,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:54,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:54,582 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) [2022-01-18 05:56:54,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 05:56:54,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-18 05:56:54,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:54,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 05:56:54,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:54,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:55,691 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:55,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965954073] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:55,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:55,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 38 [2022-01-18 05:56:55,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818728333] [2022-01-18 05:56:55,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:55,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-18 05:56:55,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:55,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-18 05:56:55,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=1143, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 05:56:55,693 INFO L87 Difference]: Start difference. First operand 1747 states and 3887 transitions. Second operand has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:57,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:57,986 INFO L93 Difference]: Finished difference Result 4310 states and 9592 transitions. [2022-01-18 05:56:57,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 05:56:57,986 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 05:56:57,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:57,993 INFO L225 Difference]: With dead ends: 4310 [2022-01-18 05:56:57,993 INFO L226 Difference]: Without dead ends: 4302 [2022-01-18 05:56:57,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3782 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2695, Invalid=8225, Unknown=0, NotChecked=0, Total=10920 [2022-01-18 05:56:57,995 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 593 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:57,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 173 Invalid, 1820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:56:58,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4302 states. [2022-01-18 05:56:58,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4302 to 2269. [2022-01-18 05:56:58,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2268 states have (on average 2.2755731922398588) internal successors, (5161), 2268 states have internal predecessors, (5161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:58,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 5161 transitions. [2022-01-18 05:56:58,065 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 5161 transitions. Word has length 35 [2022-01-18 05:56:58,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:58,066 INFO L470 AbstractCegarLoop]: Abstraction has 2269 states and 5161 transitions. [2022-01-18 05:56:58,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:58,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 5161 transitions. [2022-01-18 05:56:58,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 05:56:58,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:58,070 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:58,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 05:56:58,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-18 05:56:58,282 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:56:58,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:58,282 INFO L85 PathProgramCache]: Analyzing trace with hash 674574509, now seen corresponding path program 25 times [2022-01-18 05:56:58,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:58,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369402000] [2022-01-18 05:56:58,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:58,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:58,395 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:58,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:58,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369402000] [2022-01-18 05:56:58,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369402000] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:58,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256907446] [2022-01-18 05:56:58,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:56:58,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:58,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:58,412 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) [2022-01-18 05:56:58,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 05:56:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:58,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 05:56:58,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:58,871 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:58,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:59,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256907446] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:59,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:59,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 37 [2022-01-18 05:56:59,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051624175] [2022-01-18 05:56:59,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:59,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 05:56:59,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:59,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 05:56:59,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=1078, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 05:56:59,146 INFO L87 Difference]: Start difference. First operand 2269 states and 5161 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:00,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:00,823 INFO L93 Difference]: Finished difference Result 4342 states and 9549 transitions. [2022-01-18 05:57:00,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-18 05:57:00,824 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 05:57:00,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:00,845 INFO L225 Difference]: With dead ends: 4342 [2022-01-18 05:57:00,845 INFO L226 Difference]: Without dead ends: 4334 [2022-01-18 05:57:00,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3769 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3075, Invalid=8697, Unknown=0, NotChecked=0, Total=11772 [2022-01-18 05:57:00,847 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 471 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:00,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 209 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:57:00,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4334 states. [2022-01-18 05:57:00,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4334 to 2100. [2022-01-18 05:57:00,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2100 states, 2099 states have (on average 2.2725107193901857) internal successors, (4770), 2099 states have internal predecessors, (4770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:00,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2100 states to 2100 states and 4770 transitions. [2022-01-18 05:57:00,879 INFO L78 Accepts]: Start accepts. Automaton has 2100 states and 4770 transitions. Word has length 35 [2022-01-18 05:57:00,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:00,879 INFO L470 AbstractCegarLoop]: Abstraction has 2100 states and 4770 transitions. [2022-01-18 05:57:00,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:00,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2100 states and 4770 transitions. [2022-01-18 05:57:00,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 05:57:00,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:00,881 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:00,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 05:57:01,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 05:57:01,095 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:57:01,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:01,096 INFO L85 PathProgramCache]: Analyzing trace with hash 326959379, now seen corresponding path program 26 times [2022-01-18 05:57:01,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:01,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566587806] [2022-01-18 05:57:01,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:01,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:01,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:01,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:01,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566587806] [2022-01-18 05:57:01,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566587806] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:01,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309126128] [2022-01-18 05:57:01,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:57:01,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:01,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:01,215 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) [2022-01-18 05:57:01,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 05:57:01,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:57:01,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:57:01,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 05:57:01,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:01,537 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:01,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:02,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309126128] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:02,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:02,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 16] total 42 [2022-01-18 05:57:02,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928968269] [2022-01-18 05:57:02,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:02,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 05:57:02,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:02,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 05:57:02,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1443, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 05:57:02,044 INFO L87 Difference]: Start difference. First operand 2100 states and 4770 transitions. Second operand has 43 states, 43 states have (on average 2.2790697674418605) internal successors, (98), 42 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:04,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:04,160 INFO L93 Difference]: Finished difference Result 3300 states and 7116 transitions. [2022-01-18 05:57:04,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-18 05:57:04,160 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2790697674418605) internal successors, (98), 42 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 05:57:04,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:04,182 INFO L225 Difference]: With dead ends: 3300 [2022-01-18 05:57:04,182 INFO L226 Difference]: Without dead ends: 3111 [2022-01-18 05:57:04,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5089 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3920, Invalid=12082, Unknown=0, NotChecked=0, Total=16002 [2022-01-18 05:57:04,184 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 478 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:04,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 225 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1246 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:57:04,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2022-01-18 05:57:04,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 2017. [2022-01-18 05:57:04,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.275297619047619) internal successors, (4587), 2016 states have internal predecessors, (4587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:04,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 4587 transitions. [2022-01-18 05:57:04,241 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 4587 transitions. Word has length 37 [2022-01-18 05:57:04,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:04,241 INFO L470 AbstractCegarLoop]: Abstraction has 2017 states and 4587 transitions. [2022-01-18 05:57:04,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2790697674418605) internal successors, (98), 42 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:04,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 4587 transitions. [2022-01-18 05:57:04,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 05:57:04,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:04,244 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:04,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 05:57:04,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 05:57:04,459 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:57:04,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:04,460 INFO L85 PathProgramCache]: Analyzing trace with hash -177098347, now seen corresponding path program 27 times [2022-01-18 05:57:04,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:04,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971953695] [2022-01-18 05:57:04,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:04,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:04,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:04,558 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:04,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:04,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971953695] [2022-01-18 05:57:04,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971953695] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:04,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885430318] [2022-01-18 05:57:04,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:57:04,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:04,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:04,560 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) [2022-01-18 05:57:04,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 05:57:04,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-01-18 05:57:04,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:57:04,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:57:04,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:04,988 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:04,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:05,453 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:05,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885430318] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:05,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:05,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17, 16] total 37 [2022-01-18 05:57:05,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226940219] [2022-01-18 05:57:05,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:05,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 05:57:05,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:05,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 05:57:05,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1057, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 05:57:05,454 INFO L87 Difference]: Start difference. First operand 2017 states and 4587 transitions. Second operand has 38 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 37 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) [2022-01-18 05:57:07,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:07,132 INFO L93 Difference]: Finished difference Result 2617 states and 5755 transitions. [2022-01-18 05:57:07,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-18 05:57:07,132 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 37 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 37 [2022-01-18 05:57:07,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:07,136 INFO L225 Difference]: With dead ends: 2617 [2022-01-18 05:57:07,136 INFO L226 Difference]: Without dead ends: 2613 [2022-01-18 05:57:07,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5796 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4528, Invalid=12764, Unknown=0, NotChecked=0, Total=17292 [2022-01-18 05:57:07,141 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 394 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:07,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 128 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:57:07,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2022-01-18 05:57:07,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 2017. [2022-01-18 05:57:07,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.2748015873015874) internal successors, (4586), 2016 states have internal predecessors, (4586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:07,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 4586 transitions. [2022-01-18 05:57:07,164 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 4586 transitions. Word has length 37 [2022-01-18 05:57:07,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:07,164 INFO L470 AbstractCegarLoop]: Abstraction has 2017 states and 4586 transitions. [2022-01-18 05:57:07,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 37 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) [2022-01-18 05:57:07,164 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 4586 transitions. [2022-01-18 05:57:07,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 05:57:07,166 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:07,166 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:07,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 05:57:07,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 05:57:07,371 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:57:07,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:07,372 INFO L85 PathProgramCache]: Analyzing trace with hash -35070279, now seen corresponding path program 28 times [2022-01-18 05:57:07,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:07,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610409331] [2022-01-18 05:57:07,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:07,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:07,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:57:07,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:07,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610409331] [2022-01-18 05:57:07,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610409331] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:07,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091907346] [2022-01-18 05:57:07,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:57:07,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:07,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:07,453 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:57:07,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 05:57:07,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:57:07,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:57:07,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 05:57:07,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:07,748 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:57:07,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:08,442 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:08,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091907346] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:08,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:08,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 17] total 41 [2022-01-18 05:57:08,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478741668] [2022-01-18 05:57:08,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:08,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 05:57:08,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:08,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 05:57:08,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=1290, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 05:57:08,443 INFO L87 Difference]: Start difference. First operand 2017 states and 4586 transitions. Second operand has 42 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 41 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:10,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:10,762 INFO L93 Difference]: Finished difference Result 6297 states and 13794 transitions. [2022-01-18 05:57:10,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-18 05:57:10,762 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 41 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 05:57:10,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:10,771 INFO L225 Difference]: With dead ends: 6297 [2022-01-18 05:57:10,771 INFO L226 Difference]: Without dead ends: 6192 [2022-01-18 05:57:10,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8663 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5776, Invalid=13964, Unknown=0, NotChecked=0, Total=19740 [2022-01-18 05:57:10,773 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 755 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 1276 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 1276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:10,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 321 Invalid, 1526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 1276 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:57:10,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6192 states. [2022-01-18 05:57:10,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6192 to 3061. [2022-01-18 05:57:10,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3061 states, 3060 states have (on average 2.2669934640522875) internal successors, (6937), 3060 states have internal predecessors, (6937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:10,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3061 states to 3061 states and 6937 transitions. [2022-01-18 05:57:10,839 INFO L78 Accepts]: Start accepts. Automaton has 3061 states and 6937 transitions. Word has length 37 [2022-01-18 05:57:10,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:10,840 INFO L470 AbstractCegarLoop]: Abstraction has 3061 states and 6937 transitions. [2022-01-18 05:57:10,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 41 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:10,840 INFO L276 IsEmpty]: Start isEmpty. Operand 3061 states and 6937 transitions. [2022-01-18 05:57:10,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 05:57:10,843 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:10,843 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:10,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 05:57:11,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:11,059 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:57:11,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:11,060 INFO L85 PathProgramCache]: Analyzing trace with hash -148555911, now seen corresponding path program 29 times [2022-01-18 05:57:11,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:11,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617095151] [2022-01-18 05:57:11,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:11,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:11,200 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:11,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:11,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617095151] [2022-01-18 05:57:11,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617095151] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:11,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643980742] [2022-01-18 05:57:11,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:57:11,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:11,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:11,202 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:57:11,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 05:57:11,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-18 05:57:11,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:57:11,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 05:57:11,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:11,533 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:11,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:11,958 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:11,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643980742] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:11,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:11,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2022-01-18 05:57:11,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820361224] [2022-01-18 05:57:11,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:11,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-18 05:57:11,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:11,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-18 05:57:11,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1814, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 05:57:11,960 INFO L87 Difference]: Start difference. First operand 3061 states and 6937 transitions. Second operand has 48 states, 48 states have (on average 2.125) internal successors, (102), 47 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:15,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:15,156 INFO L93 Difference]: Finished difference Result 7660 states and 16591 transitions. [2022-01-18 05:57:15,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-18 05:57:15,156 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.125) internal successors, (102), 47 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 05:57:15,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:15,165 INFO L225 Difference]: With dead ends: 7660 [2022-01-18 05:57:15,165 INFO L226 Difference]: Without dead ends: 7474 [2022-01-18 05:57:15,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10600 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=6820, Invalid=18940, Unknown=0, NotChecked=0, Total=25760 [2022-01-18 05:57:15,167 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 798 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:15,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 300 Invalid, 1376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:57:15,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7474 states. [2022-01-18 05:57:15,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7474 to 3144. [2022-01-18 05:57:15,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3144 states, 3143 states have (on average 2.2742602608972318) internal successors, (7148), 3143 states have internal predecessors, (7148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:15,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3144 states to 3144 states and 7148 transitions. [2022-01-18 05:57:15,218 INFO L78 Accepts]: Start accepts. Automaton has 3144 states and 7148 transitions. Word has length 37 [2022-01-18 05:57:15,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:15,219 INFO L470 AbstractCegarLoop]: Abstraction has 3144 states and 7148 transitions. [2022-01-18 05:57:15,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.125) internal successors, (102), 47 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:15,219 INFO L276 IsEmpty]: Start isEmpty. Operand 3144 states and 7148 transitions. [2022-01-18 05:57:15,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 05:57:15,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:15,221 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:15,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-01-18 05:57:15,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:15,435 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:57:15,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:15,436 INFO L85 PathProgramCache]: Analyzing trace with hash -247873775, now seen corresponding path program 30 times [2022-01-18 05:57:15,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:15,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423376816] [2022-01-18 05:57:15,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:15,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:15,543 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:15,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:15,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423376816] [2022-01-18 05:57:15,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423376816] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:15,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117910183] [2022-01-18 05:57:15,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:57:15,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:15,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:15,545 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:57:15,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 05:57:15,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-18 05:57:15,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:57:15,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:57:15,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:15,769 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:15,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:16,007 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:16,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117910183] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:16,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:16,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 21 [2022-01-18 05:57:16,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612307344] [2022-01-18 05:57:16,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:16,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:57:16,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:16,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:57:16,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:57:16,008 INFO L87 Difference]: Start difference. First operand 3144 states and 7148 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:16,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:16,301 INFO L93 Difference]: Finished difference Result 5118 states and 11762 transitions. [2022-01-18 05:57:16,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 05:57:16,302 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 05:57:16,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:16,311 INFO L225 Difference]: With dead ends: 5118 [2022-01-18 05:57:16,311 INFO L226 Difference]: Without dead ends: 5048 [2022-01-18 05:57:16,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:57:16,313 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 198 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:16,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 644 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:57:16,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5048 states. [2022-01-18 05:57:16,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5048 to 3958. [2022-01-18 05:57:16,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3958 states, 3957 states have (on average 2.3040181956027292) internal successors, (9117), 3957 states have internal predecessors, (9117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:16,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3958 states to 3958 states and 9117 transitions. [2022-01-18 05:57:16,368 INFO L78 Accepts]: Start accepts. Automaton has 3958 states and 9117 transitions. Word has length 39 [2022-01-18 05:57:16,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:16,368 INFO L470 AbstractCegarLoop]: Abstraction has 3958 states and 9117 transitions. [2022-01-18 05:57:16,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:16,368 INFO L276 IsEmpty]: Start isEmpty. Operand 3958 states and 9117 transitions. [2022-01-18 05:57:16,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 05:57:16,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:16,372 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:16,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-01-18 05:57:16,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-01-18 05:57:16,587 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:57:16,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:16,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1725109521, now seen corresponding path program 31 times [2022-01-18 05:57:16,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:16,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143291239] [2022-01-18 05:57:16,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:16,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:16,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:16,749 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:16,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:16,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143291239] [2022-01-18 05:57:16,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143291239] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:16,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937773908] [2022-01-18 05:57:16,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:57:16,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:16,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:16,775 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:57:16,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 05:57:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:16,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:57:16,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:17,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:18,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937773908] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:18,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:18,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 18] total 43 [2022-01-18 05:57:18,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550656205] [2022-01-18 05:57:18,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:18,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-18 05:57:18,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:18,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-18 05:57:18,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=1459, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 05:57:18,326 INFO L87 Difference]: Start difference. First operand 3958 states and 9117 transitions. Second operand has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 43 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:22,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:22,184 INFO L93 Difference]: Finished difference Result 7185 states and 16496 transitions. [2022-01-18 05:57:22,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-18 05:57:22,185 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 43 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 05:57:22,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:22,194 INFO L225 Difference]: With dead ends: 7185 [2022-01-18 05:57:22,194 INFO L226 Difference]: Without dead ends: 7179 [2022-01-18 05:57:22,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5139 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3544, Invalid=10976, Unknown=0, NotChecked=0, Total=14520 [2022-01-18 05:57:22,195 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 773 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 1975 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 2423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 1975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:22,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 230 Invalid, 2423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 1975 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 05:57:22,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7179 states. [2022-01-18 05:57:22,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7179 to 4213. [2022-01-18 05:57:22,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4213 states, 4212 states have (on average 2.3409306742640075) internal successors, (9860), 4212 states have internal predecessors, (9860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:22,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4213 states to 4213 states and 9860 transitions. [2022-01-18 05:57:22,270 INFO L78 Accepts]: Start accepts. Automaton has 4213 states and 9860 transitions. Word has length 39 [2022-01-18 05:57:22,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:22,270 INFO L470 AbstractCegarLoop]: Abstraction has 4213 states and 9860 transitions. [2022-01-18 05:57:22,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 43 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:22,271 INFO L276 IsEmpty]: Start isEmpty. Operand 4213 states and 9860 transitions. [2022-01-18 05:57:22,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 05:57:22,276 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:22,276 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:22,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-18 05:57:22,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:22,495 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:57:22,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:22,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1853554639, now seen corresponding path program 32 times [2022-01-18 05:57:22,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:22,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842925161] [2022-01-18 05:57:22,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:22,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:22,717 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:22,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:22,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842925161] [2022-01-18 05:57:22,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842925161] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:22,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907376251] [2022-01-18 05:57:22,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:57:22,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:22,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:22,718 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:57:22,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 05:57:22,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:57:22,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:57:22,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 05:57:22,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:23,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 32 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:23,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907376251] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:23,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:23,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 18] total 42 [2022-01-18 05:57:23,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109920066] [2022-01-18 05:57:23,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:23,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 05:57:23,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:23,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 05:57:23,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=1391, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 05:57:23,502 INFO L87 Difference]: Start difference. First operand 4213 states and 9860 transitions. Second operand has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:25,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:25,820 INFO L93 Difference]: Finished difference Result 5916 states and 13505 transitions. [2022-01-18 05:57:25,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-18 05:57:25,834 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 05:57:25,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:25,843 INFO L225 Difference]: With dead ends: 5916 [2022-01-18 05:57:25,843 INFO L226 Difference]: Without dead ends: 5912 [2022-01-18 05:57:25,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6354 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4949, Invalid=13957, Unknown=0, NotChecked=0, Total=18906 [2022-01-18 05:57:25,845 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 416 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:25,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 123 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:57:25,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5912 states. [2022-01-18 05:57:25,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5912 to 3527. [2022-01-18 05:57:25,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3527 states, 3526 states have (on average 2.356211003970505) internal successors, (8308), 3526 states have internal predecessors, (8308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:25,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3527 states to 3527 states and 8308 transitions. [2022-01-18 05:57:25,900 INFO L78 Accepts]: Start accepts. Automaton has 3527 states and 8308 transitions. Word has length 39 [2022-01-18 05:57:25,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:25,900 INFO L470 AbstractCegarLoop]: Abstraction has 3527 states and 8308 transitions. [2022-01-18 05:57:25,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:25,901 INFO L276 IsEmpty]: Start isEmpty. Operand 3527 states and 8308 transitions. [2022-01-18 05:57:25,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 05:57:25,917 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:25,917 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:25,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-18 05:57:26,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:26,131 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:57:26,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:26,132 INFO L85 PathProgramCache]: Analyzing trace with hash 725410591, now seen corresponding path program 33 times [2022-01-18 05:57:26,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:26,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599762527] [2022-01-18 05:57:26,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:26,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:26,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:26,274 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:57:26,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:26,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599762527] [2022-01-18 05:57:26,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599762527] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:26,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077471794] [2022-01-18 05:57:26,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:57:26,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:26,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:26,275 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:57:26,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 05:57:26,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-18 05:57:26,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:57:26,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:57:26,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:26,806 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:26,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:27,422 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:27,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077471794] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:27,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:27,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 20] total 49 [2022-01-18 05:57:27,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20167361] [2022-01-18 05:57:27,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:27,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-18 05:57:27,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:27,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-18 05:57:27,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=2064, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 05:57:27,424 INFO L87 Difference]: Start difference. First operand 3527 states and 8308 transitions. Second operand has 50 states, 50 states have (on average 2.28) internal successors, (114), 49 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:33,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:33,759 INFO L93 Difference]: Finished difference Result 8303 states and 17604 transitions. [2022-01-18 05:57:33,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 228 states. [2022-01-18 05:57:33,759 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.28) internal successors, (114), 49 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 05:57:33,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:33,767 INFO L225 Difference]: With dead ends: 8303 [2022-01-18 05:57:33,767 INFO L226 Difference]: Without dead ends: 7946 [2022-01-18 05:57:33,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30616 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=18238, Invalid=56564, Unknown=0, NotChecked=0, Total=74802 [2022-01-18 05:57:33,771 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1008 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 2087 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 2363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 2087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:33,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1008 Valid, 424 Invalid, 2363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 2087 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 05:57:33,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7946 states. [2022-01-18 05:57:33,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7946 to 3824. [2022-01-18 05:57:33,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3824 states, 3823 states have (on average 2.3481558985090243) internal successors, (8977), 3823 states have internal predecessors, (8977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:33,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3824 states to 3824 states and 8977 transitions. [2022-01-18 05:57:33,825 INFO L78 Accepts]: Start accepts. Automaton has 3824 states and 8977 transitions. Word has length 41 [2022-01-18 05:57:33,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:33,825 INFO L470 AbstractCegarLoop]: Abstraction has 3824 states and 8977 transitions. [2022-01-18 05:57:33,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.28) internal successors, (114), 49 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:33,825 INFO L276 IsEmpty]: Start isEmpty. Operand 3824 states and 8977 transitions. [2022-01-18 05:57:33,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 05:57:33,828 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:33,828 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:33,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-18 05:57:34,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-01-18 05:57:34,044 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:57:34,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:34,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1834803435, now seen corresponding path program 34 times [2022-01-18 05:57:34,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:34,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319460010] [2022-01-18 05:57:34,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:34,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:34,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:34,154 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:34,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:34,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319460010] [2022-01-18 05:57:34,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319460010] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:34,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653554398] [2022-01-18 05:57:34,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:57:34,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:34,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:34,155 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:57:34,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 05:57:34,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:57:34,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:57:34,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:57:34,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:34,664 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:34,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:35,209 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:35,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653554398] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:35,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:35,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18, 17] total 40 [2022-01-18 05:57:35,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871708331] [2022-01-18 05:57:35,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:35,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 05:57:35,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:35,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 05:57:35,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=1230, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 05:57:35,210 INFO L87 Difference]: Start difference. First operand 3824 states and 8977 transitions. Second operand has 41 states, 41 states have (on average 2.4878048780487805) internal successors, (102), 40 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:36,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:36,972 INFO L93 Difference]: Finished difference Result 5731 states and 13056 transitions. [2022-01-18 05:57:36,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 05:57:36,972 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4878048780487805) internal successors, (102), 40 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 05:57:36,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:36,979 INFO L225 Difference]: With dead ends: 5731 [2022-01-18 05:57:36,979 INFO L226 Difference]: Without dead ends: 5727 [2022-01-18 05:57:36,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4451 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3813, Invalid=10467, Unknown=0, NotChecked=0, Total=14280 [2022-01-18 05:57:36,981 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 377 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:36,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 166 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:57:36,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5727 states. [2022-01-18 05:57:37,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5727 to 4625. [2022-01-18 05:57:37,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4625 states, 4624 states have (on average 2.343425605536332) internal successors, (10836), 4624 states have internal predecessors, (10836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:37,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4625 states to 4625 states and 10836 transitions. [2022-01-18 05:57:37,037 INFO L78 Accepts]: Start accepts. Automaton has 4625 states and 10836 transitions. Word has length 41 [2022-01-18 05:57:37,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:37,038 INFO L470 AbstractCegarLoop]: Abstraction has 4625 states and 10836 transitions. [2022-01-18 05:57:37,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4878048780487805) internal successors, (102), 40 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:37,038 INFO L276 IsEmpty]: Start isEmpty. Operand 4625 states and 10836 transitions. [2022-01-18 05:57:37,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 05:57:37,042 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:37,042 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:37,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-18 05:57:37,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-18 05:57:37,257 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:57:37,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:37,258 INFO L85 PathProgramCache]: Analyzing trace with hash 217373005, now seen corresponding path program 35 times [2022-01-18 05:57:37,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:37,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106051851] [2022-01-18 05:57:37,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:37,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:37,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:37,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106051851] [2022-01-18 05:57:37,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106051851] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:37,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154655646] [2022-01-18 05:57:37,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:57:37,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:37,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:37,364 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:57:37,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 05:57:37,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-18 05:57:37,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:57:37,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 05:57:37,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:37,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:38,162 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:38,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154655646] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:38,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:38,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 17] total 24 [2022-01-18 05:57:38,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802552841] [2022-01-18 05:57:38,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:38,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 05:57:38,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:38,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 05:57:38,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:57:38,164 INFO L87 Difference]: Start difference. First operand 4625 states and 10836 transitions. Second operand has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:38,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:38,366 INFO L93 Difference]: Finished difference Result 6487 states and 15374 transitions. [2022-01-18 05:57:38,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:57:38,367 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 05:57:38,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:38,374 INFO L225 Difference]: With dead ends: 6487 [2022-01-18 05:57:38,374 INFO L226 Difference]: Without dead ends: 6430 [2022-01-18 05:57:38,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:57:38,375 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 182 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:38,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 616 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:57:38,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6430 states. [2022-01-18 05:57:38,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6430 to 6189. [2022-01-18 05:57:38,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6189 states, 6188 states have (on average 2.397382029734971) internal successors, (14835), 6188 states have internal predecessors, (14835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:38,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6189 states to 6189 states and 14835 transitions. [2022-01-18 05:57:38,460 INFO L78 Accepts]: Start accepts. Automaton has 6189 states and 14835 transitions. Word has length 43 [2022-01-18 05:57:38,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:38,460 INFO L470 AbstractCegarLoop]: Abstraction has 6189 states and 14835 transitions. [2022-01-18 05:57:38,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:38,461 INFO L276 IsEmpty]: Start isEmpty. Operand 6189 states and 14835 transitions. [2022-01-18 05:57:38,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 05:57:38,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:38,465 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:38,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-18 05:57:38,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-18 05:57:38,681 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:57:38,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:38,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1423537757, now seen corresponding path program 36 times [2022-01-18 05:57:38,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:38,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096478542] [2022-01-18 05:57:38,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:38,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:38,875 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:38,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:38,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096478542] [2022-01-18 05:57:38,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096478542] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:38,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873715138] [2022-01-18 05:57:38,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:57:38,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:38,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:38,876 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:57:38,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 05:57:38,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-01-18 05:57:38,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:57:38,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-18 05:57:38,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:39,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:41,425 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:41,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873715138] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:41,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:41,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 20] total 48 [2022-01-18 05:57:41,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481658366] [2022-01-18 05:57:41,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:41,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-18 05:57:41,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:41,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-18 05:57:41,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=1883, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 05:57:41,427 INFO L87 Difference]: Start difference. First operand 6189 states and 14835 transitions. Second operand has 49 states, 49 states have (on average 2.36734693877551) internal successors, (116), 48 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) [2022-01-18 05:57:51,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:51,400 INFO L93 Difference]: Finished difference Result 14113 states and 32350 transitions. [2022-01-18 05:57:51,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-18 05:57:51,400 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.36734693877551) internal successors, (116), 48 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 05:57:51,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:51,425 INFO L225 Difference]: With dead ends: 14113 [2022-01-18 05:57:51,425 INFO L226 Difference]: Without dead ends: 14074 [2022-01-18 05:57:51,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12397 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=6675, Invalid=25905, Unknown=0, NotChecked=0, Total=32580 [2022-01-18 05:57:51,428 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1375 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 3756 mSolverCounterSat, 618 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1375 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 4374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 618 IncrementalHoareTripleChecker+Valid, 3756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:51,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1375 Valid, 505 Invalid, 4374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [618 Valid, 3756 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 05:57:51,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14074 states. [2022-01-18 05:57:51,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14074 to 7107. [2022-01-18 05:57:51,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7107 states, 7106 states have (on average 2.41345341964537) internal successors, (17150), 7106 states have internal predecessors, (17150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:51,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7107 states to 7107 states and 17150 transitions. [2022-01-18 05:57:51,600 INFO L78 Accepts]: Start accepts. Automaton has 7107 states and 17150 transitions. Word has length 43 [2022-01-18 05:57:51,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:51,600 INFO L470 AbstractCegarLoop]: Abstraction has 7107 states and 17150 transitions. [2022-01-18 05:57:51,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.36734693877551) internal successors, (116), 48 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) [2022-01-18 05:57:51,601 INFO L276 IsEmpty]: Start isEmpty. Operand 7107 states and 17150 transitions. [2022-01-18 05:57:51,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 05:57:51,628 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:51,628 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:51,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-18 05:57:51,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:51,851 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:57:51,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:51,852 INFO L85 PathProgramCache]: Analyzing trace with hash 2141063629, now seen corresponding path program 37 times [2022-01-18 05:57:51,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:51,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487025037] [2022-01-18 05:57:51,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:51,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:51,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:52,061 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:52,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:52,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487025037] [2022-01-18 05:57:52,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487025037] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:52,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448172438] [2022-01-18 05:57:52,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:57:52,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:52,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:52,084 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:57:52,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 05:57:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:52,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-18 05:57:52,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:52,594 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:52,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:53,824 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 19 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:53,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448172438] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:53,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:53,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 20] total 48 [2022-01-18 05:57:53,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240420469] [2022-01-18 05:57:53,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:53,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-18 05:57:53,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:53,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-18 05:57:53,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=1812, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 05:57:53,826 INFO L87 Difference]: Start difference. First operand 7107 states and 17150 transitions. Second operand has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 48 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:00,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:58:00,032 INFO L93 Difference]: Finished difference Result 11263 states and 26738 transitions. [2022-01-18 05:58:00,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-18 05:58:00,033 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 48 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 05:58:00,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:58:00,046 INFO L225 Difference]: With dead ends: 11263 [2022-01-18 05:58:00,046 INFO L226 Difference]: Without dead ends: 11257 [2022-01-18 05:58:00,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7749 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=5198, Invalid=16264, Unknown=0, NotChecked=0, Total=21462 [2022-01-18 05:58:00,050 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 695 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 3735 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 4158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 3735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:58:00,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [695 Valid, 418 Invalid, 4158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 3735 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 05:58:00,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11257 states. [2022-01-18 05:58:00,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11257 to 7121. [2022-01-18 05:58:00,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7121 states, 7120 states have (on average 2.3985955056179775) internal successors, (17078), 7120 states have internal predecessors, (17078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:00,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7121 states to 7121 states and 17078 transitions. [2022-01-18 05:58:00,171 INFO L78 Accepts]: Start accepts. Automaton has 7121 states and 17078 transitions. Word has length 43 [2022-01-18 05:58:00,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:58:00,171 INFO L470 AbstractCegarLoop]: Abstraction has 7121 states and 17078 transitions. [2022-01-18 05:58:00,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 48 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:00,171 INFO L276 IsEmpty]: Start isEmpty. Operand 7121 states and 17078 transitions. [2022-01-18 05:58:00,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 05:58:00,177 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:58:00,177 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:58:00,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-18 05:58:00,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 05:58:00,385 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:58:00,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:58:00,397 INFO L85 PathProgramCache]: Analyzing trace with hash -2112358153, now seen corresponding path program 38 times [2022-01-18 05:58:00,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:58:00,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251341387] [2022-01-18 05:58:00,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:58:00,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:58:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:58:00,559 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 19 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:58:00,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:58:00,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251341387] [2022-01-18 05:58:00,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251341387] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:58:00,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209735557] [2022-01-18 05:58:00,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:58:00,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:58:00,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:58:00,561 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:58:00,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 05:58:00,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:58:00,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:58:00,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:58:00,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:58:00,979 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:00,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:58:01,646 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 17 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:01,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209735557] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:58:01,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:58:01,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 20] total 51 [2022-01-18 05:58:01,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519443094] [2022-01-18 05:58:01,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:58:01,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-18 05:58:01,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:58:01,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-18 05:58:01,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=2232, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 05:58:01,647 INFO L87 Difference]: Start difference. First operand 7121 states and 17078 transitions. Second operand has 52 states, 52 states have (on average 2.1923076923076925) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:07,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:58:07,390 INFO L93 Difference]: Finished difference Result 23199 states and 51780 transitions. [2022-01-18 05:58:07,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-01-18 05:58:07,391 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1923076923076925) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 05:58:07,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:58:07,420 INFO L225 Difference]: With dead ends: 23199 [2022-01-18 05:58:07,421 INFO L226 Difference]: Without dead ends: 22782 [2022-01-18 05:58:07,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17718 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=10278, Invalid=36594, Unknown=0, NotChecked=0, Total=46872 [2022-01-18 05:58:07,424 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 870 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 2092 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 2373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 2092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:58:07,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [870 Valid, 337 Invalid, 2373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 2092 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 05:58:07,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22782 states. [2022-01-18 05:58:07,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22782 to 8676. [2022-01-18 05:58:07,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8676 states, 8675 states have (on average 2.400806916426513) internal successors, (20827), 8675 states have internal predecessors, (20827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:07,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8676 states to 8676 states and 20827 transitions. [2022-01-18 05:58:07,715 INFO L78 Accepts]: Start accepts. Automaton has 8676 states and 20827 transitions. Word has length 43 [2022-01-18 05:58:07,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:58:07,716 INFO L470 AbstractCegarLoop]: Abstraction has 8676 states and 20827 transitions. [2022-01-18 05:58:07,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.1923076923076925) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:07,716 INFO L276 IsEmpty]: Start isEmpty. Operand 8676 states and 20827 transitions. [2022-01-18 05:58:07,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 05:58:07,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:58:07,725 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:58:07,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-01-18 05:58:07,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-18 05:58:07,926 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:58:07,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:58:07,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1531415989, now seen corresponding path program 39 times [2022-01-18 05:58:07,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:58:07,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119540202] [2022-01-18 05:58:07,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:58:07,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:58:07,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:58:08,037 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:08,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:58:08,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119540202] [2022-01-18 05:58:08,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119540202] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:58:08,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900629911] [2022-01-18 05:58:08,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:58:08,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:58:08,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:58:08,038 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:58:08,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 05:58:08,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-01-18 05:58:08,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:58:08,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 05:58:08,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:58:08,564 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:08,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:58:08,985 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 44 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:08,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900629911] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:58:08,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:58:08,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 20] total 47 [2022-01-18 05:58:08,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012679808] [2022-01-18 05:58:08,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:58:08,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-18 05:58:08,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:58:08,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-18 05:58:08,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=1743, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 05:58:08,986 INFO L87 Difference]: Start difference. First operand 8676 states and 20827 transitions. Second operand has 48 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 47 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:12,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:58:12,081 INFO L93 Difference]: Finished difference Result 12074 states and 28318 transitions. [2022-01-18 05:58:12,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-18 05:58:12,082 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 47 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 05:58:12,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:58:12,095 INFO L225 Difference]: With dead ends: 12074 [2022-01-18 05:58:12,095 INFO L226 Difference]: Without dead ends: 12070 [2022-01-18 05:58:12,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10473 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7559, Invalid=21853, Unknown=0, NotChecked=0, Total=29412 [2022-01-18 05:58:12,096 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 692 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:58:12,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [692 Valid, 190 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:58:12,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12070 states. [2022-01-18 05:58:12,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12070 to 7183. [2022-01-18 05:58:12,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7183 states, 7182 states have (on average 2.404204956836536) internal successors, (17267), 7182 states have internal predecessors, (17267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:12,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7183 states to 7183 states and 17267 transitions. [2022-01-18 05:58:12,196 INFO L78 Accepts]: Start accepts. Automaton has 7183 states and 17267 transitions. Word has length 43 [2022-01-18 05:58:12,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:58:12,196 INFO L470 AbstractCegarLoop]: Abstraction has 7183 states and 17267 transitions. [2022-01-18 05:58:12,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 47 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:12,196 INFO L276 IsEmpty]: Start isEmpty. Operand 7183 states and 17267 transitions. [2022-01-18 05:58:12,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-18 05:58:12,202 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:58:12,202 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:58:12,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-18 05:58:12,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:58:12,408 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:58:12,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:58:12,408 INFO L85 PathProgramCache]: Analyzing trace with hash 289457547, now seen corresponding path program 40 times [2022-01-18 05:58:12,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:58:12,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951039021] [2022-01-18 05:58:12,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:58:12,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:58:12,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:58:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:12,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:58:12,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951039021] [2022-01-18 05:58:12,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951039021] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:58:12,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772946871] [2022-01-18 05:58:12,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:58:12,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:58:12,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:58:12,583 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:58:12,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 05:58:12,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:58:12,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:58:12,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:58:12,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:58:13,093 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:13,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:58:13,773 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 56 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:13,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772946871] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:58:13,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:58:13,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 20] total 54 [2022-01-18 05:58:13,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093636451] [2022-01-18 05:58:13,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:58:13,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-18 05:58:13,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:58:13,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-18 05:58:13,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=2395, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 05:58:13,775 INFO L87 Difference]: Start difference. First operand 7183 states and 17267 transitions. Second operand has 55 states, 55 states have (on average 2.2181818181818183) internal successors, (122), 54 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:18,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:58:18,313 INFO L93 Difference]: Finished difference Result 11408 states and 26181 transitions. [2022-01-18 05:58:18,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-18 05:58:18,313 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.2181818181818183) internal successors, (122), 54 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-01-18 05:58:18,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:58:18,326 INFO L225 Difference]: With dead ends: 11408 [2022-01-18 05:58:18,326 INFO L226 Difference]: Without dead ends: 10835 [2022-01-18 05:58:18,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12470 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=8734, Invalid=27176, Unknown=0, NotChecked=0, Total=35910 [2022-01-18 05:58:18,329 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 729 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 1683 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:58:18,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [729 Valid, 270 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1683 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 05:58:18,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10835 states. [2022-01-18 05:58:18,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10835 to 7730. [2022-01-18 05:58:18,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7730 states, 7729 states have (on average 2.387631000129383) internal successors, (18454), 7729 states have internal predecessors, (18454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:18,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7730 states to 7730 states and 18454 transitions. [2022-01-18 05:58:18,427 INFO L78 Accepts]: Start accepts. Automaton has 7730 states and 18454 transitions. Word has length 45 [2022-01-18 05:58:18,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:58:18,428 INFO L470 AbstractCegarLoop]: Abstraction has 7730 states and 18454 transitions. [2022-01-18 05:58:18,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.2181818181818183) internal successors, (122), 54 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:18,428 INFO L276 IsEmpty]: Start isEmpty. Operand 7730 states and 18454 transitions. [2022-01-18 05:58:18,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-18 05:58:18,435 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:58:18,435 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:58:18,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-18 05:58:18,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-01-18 05:58:18,637 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:58:18,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:58:18,641 INFO L85 PathProgramCache]: Analyzing trace with hash -2075959915, now seen corresponding path program 41 times [2022-01-18 05:58:18,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:58:18,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631452159] [2022-01-18 05:58:18,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:58:18,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:58:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:58:18,758 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:18,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:58:18,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631452159] [2022-01-18 05:58:18,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631452159] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:58:18,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220035752] [2022-01-18 05:58:18,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:58:18,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:58:18,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:58:18,760 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:58:18,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 05:58:18,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-01-18 05:58:18,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:58:18,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:58:18,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:58:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:19,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:58:19,548 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:19,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220035752] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:58:19,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:58:19,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21, 20] total 47 [2022-01-18 05:58:19,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224547084] [2022-01-18 05:58:19,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:58:19,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-18 05:58:19,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:58:19,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-18 05:58:19,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 05:58:19,549 INFO L87 Difference]: Start difference. First operand 7730 states and 18454 transitions. Second operand has 48 states, 48 states have (on average 2.375) internal successors, (114), 47 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:22,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:58:22,691 INFO L93 Difference]: Finished difference Result 8996 states and 21001 transitions. [2022-01-18 05:58:22,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2022-01-18 05:58:22,691 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.375) internal successors, (114), 47 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-01-18 05:58:22,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:58:22,701 INFO L225 Difference]: With dead ends: 8996 [2022-01-18 05:58:22,701 INFO L226 Difference]: Without dead ends: 8992 [2022-01-18 05:58:22,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15551 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=10580, Invalid=31240, Unknown=0, NotChecked=0, Total=41820 [2022-01-18 05:58:22,704 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 390 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:58:22,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 182 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:58:22,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8992 states. [2022-01-18 05:58:22,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8992 to 7730. [2022-01-18 05:58:22,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7730 states, 7729 states have (on average 2.387242851597878) internal successors, (18451), 7729 states have internal predecessors, (18451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:22,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7730 states to 7730 states and 18451 transitions. [2022-01-18 05:58:22,791 INFO L78 Accepts]: Start accepts. Automaton has 7730 states and 18451 transitions. Word has length 45 [2022-01-18 05:58:22,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:58:22,791 INFO L470 AbstractCegarLoop]: Abstraction has 7730 states and 18451 transitions. [2022-01-18 05:58:22,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.375) internal successors, (114), 47 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:22,791 INFO L276 IsEmpty]: Start isEmpty. Operand 7730 states and 18451 transitions. [2022-01-18 05:58:22,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-18 05:58:22,797 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:58:22,797 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:58:22,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-01-18 05:58:23,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:58:23,004 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:58:23,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:58:23,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1464272399, now seen corresponding path program 42 times [2022-01-18 05:58:23,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:58:23,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76841577] [2022-01-18 05:58:23,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:58:23,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:58:23,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:58:23,140 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 38 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 05:58:23,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:58:23,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76841577] [2022-01-18 05:58:23,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76841577] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:58:23,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125433082] [2022-01-18 05:58:23,141 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:58:23,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:58:23,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:58:23,156 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:58:23,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 05:58:23,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-01-18 05:58:23,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:58:23,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 05:58:23,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:58:23,545 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 20 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:23,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:58:24,275 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 25 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:24,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125433082] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:58:24,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:58:24,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21, 22] total 52 [2022-01-18 05:58:24,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048256541] [2022-01-18 05:58:24,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:58:24,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-18 05:58:24,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:58:24,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-18 05:58:24,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=516, Invalid=2240, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 05:58:24,276 INFO L87 Difference]: Start difference. First operand 7730 states and 18451 transitions. Second operand has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 52 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) [2022-01-18 05:58:28,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:58:28,617 INFO L93 Difference]: Finished difference Result 27688 states and 62379 transitions. [2022-01-18 05:58:28,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-01-18 05:58:28,617 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 52 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 45 [2022-01-18 05:58:28,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:58:28,671 INFO L225 Difference]: With dead ends: 27688 [2022-01-18 05:58:28,672 INFO L226 Difference]: Without dead ends: 27340 [2022-01-18 05:58:28,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15186 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=9660, Invalid=28170, Unknown=0, NotChecked=0, Total=37830 [2022-01-18 05:58:28,673 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 995 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 1993 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 995 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 2325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:58:28,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [995 Valid, 254 Invalid, 2325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1993 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 05:58:28,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27340 states. [2022-01-18 05:58:28,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27340 to 10468. [2022-01-18 05:58:28,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10468 states, 10467 states have (on average 2.3889366580682143) internal successors, (25005), 10467 states have internal predecessors, (25005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:28,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10468 states to 10468 states and 25005 transitions. [2022-01-18 05:58:28,958 INFO L78 Accepts]: Start accepts. Automaton has 10468 states and 25005 transitions. Word has length 45 [2022-01-18 05:58:28,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:58:28,958 INFO L470 AbstractCegarLoop]: Abstraction has 10468 states and 25005 transitions. [2022-01-18 05:58:28,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 52 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) [2022-01-18 05:58:28,958 INFO L276 IsEmpty]: Start isEmpty. Operand 10468 states and 25005 transitions. [2022-01-18 05:58:28,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 05:58:28,968 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:58:28,968 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:58:28,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-01-18 05:58:29,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:58:29,195 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:58:29,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:58:29,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1927395959, now seen corresponding path program 43 times [2022-01-18 05:58:29,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:58:29,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136383811] [2022-01-18 05:58:29,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:58:29,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:58:29,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:58:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 1 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:29,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:58:29,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136383811] [2022-01-18 05:58:29,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136383811] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:58:29,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891632342] [2022-01-18 05:58:29,309 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:58:29,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:58:29,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:58:29,310 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:58:29,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 05:58:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:58:29,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 05:58:29,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:58:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:29,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:58:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:30,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891632342] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:58:30,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:58:30,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 19] total 27 [2022-01-18 05:58:30,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181932174] [2022-01-18 05:58:30,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:58:30,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:58:30,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:58:30,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:58:30,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:58:30,180 INFO L87 Difference]: Start difference. First operand 10468 states and 25005 transitions. Second operand has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:30,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:58:30,396 INFO L93 Difference]: Finished difference Result 13463 states and 32382 transitions. [2022-01-18 05:58:30,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:58:30,396 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 05:58:30,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:58:30,415 INFO L225 Difference]: With dead ends: 13463 [2022-01-18 05:58:30,416 INFO L226 Difference]: Without dead ends: 13400 [2022-01-18 05:58:30,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 82 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:58:30,418 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 290 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:58:30,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 700 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:58:30,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13400 states. [2022-01-18 05:58:30,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13400 to 12840. [2022-01-18 05:58:30,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12840 states, 12839 states have (on average 2.4131941740010903) internal successors, (30983), 12839 states have internal predecessors, (30983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:30,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12840 states to 12840 states and 30983 transitions. [2022-01-18 05:58:30,599 INFO L78 Accepts]: Start accepts. Automaton has 12840 states and 30983 transitions. Word has length 47 [2022-01-18 05:58:30,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:58:30,599 INFO L470 AbstractCegarLoop]: Abstraction has 12840 states and 30983 transitions. [2022-01-18 05:58:30,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:30,599 INFO L276 IsEmpty]: Start isEmpty. Operand 12840 states and 30983 transitions. [2022-01-18 05:58:30,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 05:58:30,609 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:58:30,609 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:58:30,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-18 05:58:30,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-01-18 05:58:30,825 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:58:30,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:58:30,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1790816549, now seen corresponding path program 44 times [2022-01-18 05:58:30,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:58:30,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348317762] [2022-01-18 05:58:30,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:58:30,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:58:30,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:58:31,215 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:31,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:58:31,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348317762] [2022-01-18 05:58:31,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348317762] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:58:31,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196418268] [2022-01-18 05:58:31,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:58:31,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:58:31,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:58:31,217 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:58:31,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 05:58:31,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:58:31,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:58:31,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 05:58:31,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:58:31,969 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:31,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:58:34,623 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:34,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196418268] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:58:34,624 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:58:34,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 58 [2022-01-18 05:58:34,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672682510] [2022-01-18 05:58:34,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:58:34,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-18 05:58:34,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:58:34,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-18 05:58:34,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=2904, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 05:58:34,625 INFO L87 Difference]: Start difference. First operand 12840 states and 30983 transitions. Second operand has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 58 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:56,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:58:56,664 INFO L93 Difference]: Finished difference Result 20720 states and 47882 transitions. [2022-01-18 05:58:56,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-18 05:58:56,665 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 58 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have 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 [2022-01-18 05:58:56,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:58:56,689 INFO L225 Difference]: With dead ends: 20720 [2022-01-18 05:58:56,689 INFO L226 Difference]: Without dead ends: 19952 [2022-01-18 05:58:56,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11526 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=6771, Invalid=26535, Unknown=0, NotChecked=0, Total=33306 [2022-01-18 05:58:56,691 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 972 mSDsluCounter, 1532 mSDsCounter, 0 mSdLazyCounter, 3529 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 3950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 3529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:58:56,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [972 Valid, 776 Invalid, 3950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [421 Valid, 3529 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-18 05:58:56,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19952 states. [2022-01-18 05:58:56,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19952 to 14485. [2022-01-18 05:58:56,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14485 states, 14484 states have (on average 2.24081745374206) internal successors, (32456), 14484 states have internal predecessors, (32456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:56,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14485 states to 14485 states and 32456 transitions. [2022-01-18 05:58:56,915 INFO L78 Accepts]: Start accepts. Automaton has 14485 states and 32456 transitions. Word has length 47 [2022-01-18 05:58:56,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:58:56,915 INFO L470 AbstractCegarLoop]: Abstraction has 14485 states and 32456 transitions. [2022-01-18 05:58:56,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 58 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:56,915 INFO L276 IsEmpty]: Start isEmpty. Operand 14485 states and 32456 transitions. [2022-01-18 05:58:56,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 05:58:56,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:58:56,924 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:58:56,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-18 05:58:57,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-18 05:58:57,137 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:58:57,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:58:57,137 INFO L85 PathProgramCache]: Analyzing trace with hash -129322871, now seen corresponding path program 45 times [2022-01-18 05:58:57,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:58:57,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088565185] [2022-01-18 05:58:57,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:58:57,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:58:57,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:58:57,444 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:57,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:58:57,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088565185] [2022-01-18 05:58:57,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088565185] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:58:57,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911017950] [2022-01-18 05:58:57,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:58:57,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:58:57,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:58:57,464 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:58:57,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 05:58:57,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-18 05:58:57,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:58:57,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2022-01-18 05:58:57,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:58:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:58,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:00,529 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 22 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:00,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911017950] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:00,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:00,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22, 22] total 53 [2022-01-18 05:59:00,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088465932] [2022-01-18 05:59:00,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:00,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-18 05:59:00,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:00,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-18 05:59:00,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=660, Invalid=2202, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 05:59:00,530 INFO L87 Difference]: Start difference. First operand 14485 states and 32456 transitions. Second operand has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 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) [2022-01-18 05:59:08,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:08,694 INFO L93 Difference]: Finished difference Result 24787 states and 56061 transitions. [2022-01-18 05:59:08,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-18 05:59:08,695 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 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 47 [2022-01-18 05:59:08,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:08,728 INFO L225 Difference]: With dead ends: 24787 [2022-01-18 05:59:08,728 INFO L226 Difference]: Without dead ends: 24781 [2022-01-18 05:59:08,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8411 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=5603, Invalid=17653, Unknown=0, NotChecked=0, Total=23256 [2022-01-18 05:59:08,729 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 986 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 3687 mSolverCounterSat, 608 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 986 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 4295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 608 IncrementalHoareTripleChecker+Valid, 3687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:08,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [986 Valid, 283 Invalid, 4295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [608 Valid, 3687 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 05:59:08,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24781 states. [2022-01-18 05:59:09,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24781 to 18743. [2022-01-18 05:59:09,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18743 states, 18742 states have (on average 2.2557891366983247) internal successors, (42278), 18742 states have internal predecessors, (42278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:09,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18743 states to 18743 states and 42278 transitions. [2022-01-18 05:59:09,103 INFO L78 Accepts]: Start accepts. Automaton has 18743 states and 42278 transitions. Word has length 47 [2022-01-18 05:59:09,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:09,104 INFO L470 AbstractCegarLoop]: Abstraction has 18743 states and 42278 transitions. [2022-01-18 05:59:09,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 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) [2022-01-18 05:59:09,104 INFO L276 IsEmpty]: Start isEmpty. Operand 18743 states and 42278 transitions. [2022-01-18 05:59:09,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 05:59:09,118 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:09,118 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:09,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-18 05:59:09,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-01-18 05:59:09,342 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:09,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:09,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1055250745, now seen corresponding path program 46 times [2022-01-18 05:59:09,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:09,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892966729] [2022-01-18 05:59:09,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:09,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:09,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:09,522 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 51 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:09,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:09,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892966729] [2022-01-18 05:59:09,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892966729] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:09,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049982094] [2022-01-18 05:59:09,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:59:09,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:09,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:09,536 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:59:09,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 05:59:09,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:59:09,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:09,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 05:59:09,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:10,189 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 51 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:10,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:10,635 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 58 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:10,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049982094] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:10,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:10,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22, 22] total 52 [2022-01-18 05:59:10,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241390754] [2022-01-18 05:59:10,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:10,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-18 05:59:10,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:10,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-18 05:59:10,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=619, Invalid=2137, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 05:59:10,636 INFO L87 Difference]: Start difference. First operand 18743 states and 42278 transitions. Second operand has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 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) [2022-01-18 05:59:14,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:14,203 INFO L93 Difference]: Finished difference Result 26020 states and 58276 transitions. [2022-01-18 05:59:14,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-01-18 05:59:14,204 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 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 47 [2022-01-18 05:59:14,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:14,242 INFO L225 Difference]: With dead ends: 26020 [2022-01-18 05:59:14,242 INFO L226 Difference]: Without dead ends: 26016 [2022-01-18 05:59:14,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16812 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=11497, Invalid=34085, Unknown=0, NotChecked=0, Total=45582 [2022-01-18 05:59:14,248 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 728 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 1552 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 1552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:14,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 345 Invalid, 1760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 1552 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:59:14,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26016 states. [2022-01-18 05:59:14,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26016 to 18578. [2022-01-18 05:59:14,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18578 states, 18577 states have (on average 2.264143833772945) internal successors, (42061), 18577 states have internal predecessors, (42061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:14,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18578 states to 18578 states and 42061 transitions. [2022-01-18 05:59:14,618 INFO L78 Accepts]: Start accepts. Automaton has 18578 states and 42061 transitions. Word has length 47 [2022-01-18 05:59:14,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:14,618 INFO L470 AbstractCegarLoop]: Abstraction has 18578 states and 42061 transitions. [2022-01-18 05:59:14,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 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) [2022-01-18 05:59:14,618 INFO L276 IsEmpty]: Start isEmpty. Operand 18578 states and 42061 transitions. [2022-01-18 05:59:14,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-18 05:59:14,635 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:14,635 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:14,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-01-18 05:59:14,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:14,856 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:14,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:14,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1962795719, now seen corresponding path program 47 times [2022-01-18 05:59:14,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:14,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235998486] [2022-01-18 05:59:14,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:14,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:15,062 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:15,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:15,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235998486] [2022-01-18 05:59:15,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235998486] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:15,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376174939] [2022-01-18 05:59:15,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:59:15,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:15,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:15,063 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:59:15,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 05:59:15,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-01-18 05:59:15,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:15,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-18 05:59:15,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:15,687 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:15,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:16,297 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 72 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:16,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376174939] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:16,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:16,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 22] total 60 [2022-01-18 05:59:16,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119081136] [2022-01-18 05:59:16,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:16,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-18 05:59:16,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:16,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-18 05:59:16,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=699, Invalid=2961, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 05:59:16,299 INFO L87 Difference]: Start difference. First operand 18578 states and 42061 transitions. Second operand has 61 states, 61 states have (on average 2.19672131147541) internal successors, (134), 60 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:21,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:21,194 INFO L93 Difference]: Finished difference Result 21738 states and 48486 transitions. [2022-01-18 05:59:21,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-01-18 05:59:21,195 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.19672131147541) internal successors, (134), 60 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-01-18 05:59:21,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:21,222 INFO L225 Difference]: With dead ends: 21738 [2022-01-18 05:59:21,222 INFO L226 Difference]: Without dead ends: 21222 [2022-01-18 05:59:21,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18341 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=12357, Invalid=38493, Unknown=0, NotChecked=0, Total=50850 [2022-01-18 05:59:21,226 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 906 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 1845 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 2002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:21,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [906 Valid, 294 Invalid, 2002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1845 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 05:59:21,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21222 states. [2022-01-18 05:59:21,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21222 to 18290. [2022-01-18 05:59:21,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18290 states, 18289 states have (on average 2.263601071682432) internal successors, (41399), 18289 states have internal predecessors, (41399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:21,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18290 states to 18290 states and 41399 transitions. [2022-01-18 05:59:21,547 INFO L78 Accepts]: Start accepts. Automaton has 18290 states and 41399 transitions. Word has length 49 [2022-01-18 05:59:21,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:21,548 INFO L470 AbstractCegarLoop]: Abstraction has 18290 states and 41399 transitions. [2022-01-18 05:59:21,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.19672131147541) internal successors, (134), 60 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:21,548 INFO L276 IsEmpty]: Start isEmpty. Operand 18290 states and 41399 transitions. [2022-01-18 05:59:21,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-18 05:59:21,560 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:21,560 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:21,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-18 05:59:21,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-01-18 05:59:21,776 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:21,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:21,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1919003925, now seen corresponding path program 48 times [2022-01-18 05:59:21,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:21,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708146228] [2022-01-18 05:59:21,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:21,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:21,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:21,893 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:21,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:21,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708146228] [2022-01-18 05:59:21,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708146228] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:21,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484923540] [2022-01-18 05:59:21,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:59:21,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:21,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:21,895 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:59:21,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 05:59:21,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-01-18 05:59:21,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:21,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 05:59:21,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:22,510 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:22,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:23,297 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:23,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484923540] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:23,298 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:23,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 23, 22] total 52 [2022-01-18 05:59:23,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727558157] [2022-01-18 05:59:23,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:23,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-18 05:59:23,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:23,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-18 05:59:23,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=661, Invalid=2095, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 05:59:23,299 INFO L87 Difference]: Start difference. First operand 18290 states and 41399 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) [2022-01-18 05:59:29,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:29,105 INFO L93 Difference]: Finished difference Result 19699 states and 44208 transitions. [2022-01-18 05:59:29,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2022-01-18 05:59:29,105 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 49 [2022-01-18 05:59:29,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:29,136 INFO L225 Difference]: With dead ends: 19699 [2022-01-18 05:59:29,136 INFO L226 Difference]: Without dead ends: 19695 [2022-01-18 05:59:29,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23346 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=14862, Invalid=44918, Unknown=0, NotChecked=0, Total=59780 [2022-01-18 05:59:29,139 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 482 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:29,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 167 Invalid, 1433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1316 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 05:59:29,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19695 states. [2022-01-18 05:59:29,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19695 to 18290. [2022-01-18 05:59:29,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18290 states, 18289 states have (on average 2.2634917163322217) internal successors, (41397), 18289 states have internal predecessors, (41397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:29,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18290 states to 18290 states and 41397 transitions. [2022-01-18 05:59:29,456 INFO L78 Accepts]: Start accepts. Automaton has 18290 states and 41397 transitions. Word has length 49 [2022-01-18 05:59:29,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:29,456 INFO L470 AbstractCegarLoop]: Abstraction has 18290 states and 41397 transitions. [2022-01-18 05:59:29,456 INFO L471 AbstractCegarLoop]: INTERPOLANT 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) [2022-01-18 05:59:29,456 INFO L276 IsEmpty]: Start isEmpty. Operand 18290 states and 41397 transitions. [2022-01-18 05:59:29,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-18 05:59:29,474 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:29,474 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:29,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 05:59:29,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 05:59:29,687 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:29,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:29,688 INFO L85 PathProgramCache]: Analyzing trace with hash 736975417, now seen corresponding path program 49 times [2022-01-18 05:59:29,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:29,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055813453] [2022-01-18 05:59:29,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:29,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:29,869 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 56 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:29,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:29,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055813453] [2022-01-18 05:59:29,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055813453] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:29,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177947336] [2022-01-18 05:59:29,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:59:29,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:29,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:29,871 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:59:29,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 05:59:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:29,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 05:59:29,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 56 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:30,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:31,169 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:31,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177947336] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:31,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:31,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 24] total 65 [2022-01-18 05:59:31,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682584911] [2022-01-18 05:59:31,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:31,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-18 05:59:31,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:31,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-18 05:59:31,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=772, Invalid=3518, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 05:59:31,171 INFO L87 Difference]: Start difference. First operand 18290 states and 41397 transitions. Second operand has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:39,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:39,742 INFO L93 Difference]: Finished difference Result 43892 states and 98386 transitions. [2022-01-18 05:59:39,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 254 states. [2022-01-18 05:59:39,743 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-01-18 05:59:39,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:39,829 INFO L225 Difference]: With dead ends: 43892 [2022-01-18 05:59:39,830 INFO L226 Difference]: Without dead ends: 43177 [2022-01-18 05:59:39,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42237 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=24395, Invalid=74515, Unknown=0, NotChecked=0, Total=98910 [2022-01-18 05:59:39,835 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1531 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 2707 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1531 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 3044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 2707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:39,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1531 Valid, 665 Invalid, 3044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 2707 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 05:59:39,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43177 states. [2022-01-18 05:59:40,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43177 to 21332. [2022-01-18 05:59:40,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21332 states, 21331 states have (on average 2.2915475130092355) internal successors, (48881), 21331 states have internal predecessors, (48881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:40,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21332 states to 21332 states and 48881 transitions. [2022-01-18 05:59:40,424 INFO L78 Accepts]: Start accepts. Automaton has 21332 states and 48881 transitions. Word has length 49 [2022-01-18 05:59:40,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:40,424 INFO L470 AbstractCegarLoop]: Abstraction has 21332 states and 48881 transitions. [2022-01-18 05:59:40,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:40,425 INFO L276 IsEmpty]: Start isEmpty. Operand 21332 states and 48881 transitions. [2022-01-18 05:59:40,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-18 05:59:40,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:40,444 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:40,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 05:59:40,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:40,660 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:40,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:40,660 INFO L85 PathProgramCache]: Analyzing trace with hash -167181371, now seen corresponding path program 50 times [2022-01-18 05:59:40,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:40,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854701348] [2022-01-18 05:59:40,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:40,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:40,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:40,784 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 1 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:40,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:40,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854701348] [2022-01-18 05:59:40,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854701348] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:40,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043128341] [2022-01-18 05:59:40,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:59:40,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:40,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:40,786 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:59:40,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 05:59:40,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:59:40,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:40,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 05:59:40,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:40,987 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:40,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:41,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043128341] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:41,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:41,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 21] total 30 [2022-01-18 05:59:41,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173369746] [2022-01-18 05:59:41,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:41,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:59:41,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:41,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:59:41,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=642, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:59:41,508 INFO L87 Difference]: Start difference. First operand 21332 states and 48881 transitions. Second operand has 30 states, 30 states have (on average 3.2) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:41,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:41,855 INFO L93 Difference]: Finished difference Result 26854 states and 62395 transitions. [2022-01-18 05:59:41,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:59:41,856 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-01-18 05:59:41,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:41,957 INFO L225 Difference]: With dead ends: 26854 [2022-01-18 05:59:41,958 INFO L226 Difference]: Without dead ends: 26785 [2022-01-18 05:59:41,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 89 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=642, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:59:41,958 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 309 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:41,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 896 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:59:41,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26785 states. [2022-01-18 05:59:42,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26785 to 25947. [2022-01-18 05:59:42,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25947 states, 25946 states have (on average 2.3242503661450704) internal successors, (60305), 25946 states have internal predecessors, (60305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:42,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25947 states to 25947 states and 60305 transitions. [2022-01-18 05:59:42,323 INFO L78 Accepts]: Start accepts. Automaton has 25947 states and 60305 transitions. Word has length 51 [2022-01-18 05:59:42,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:42,323 INFO L470 AbstractCegarLoop]: Abstraction has 25947 states and 60305 transitions. [2022-01-18 05:59:42,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:42,324 INFO L276 IsEmpty]: Start isEmpty. Operand 25947 states and 60305 transitions. [2022-01-18 05:59:42,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-18 05:59:42,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:42,341 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:42,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-18 05:59:42,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-01-18 05:59:42,556 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:42,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:42,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1055790999, now seen corresponding path program 51 times [2022-01-18 05:59:42,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:42,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715991071] [2022-01-18 05:59:42,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:42,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:42,919 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:42,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:42,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715991071] [2022-01-18 05:59:42,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715991071] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:42,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12402123] [2022-01-18 05:59:42,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:59:42,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:42,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:42,920 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:59:42,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 05:59:42,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-18 05:59:42,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:42,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 05:59:42,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:43,326 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 20 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:43,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:43,569 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:43,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12402123] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:43,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:43,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 13] total 45 [2022-01-18 05:59:43,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801864620] [2022-01-18 05:59:43,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:43,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 05:59:43,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:43,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 05:59:43,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=1643, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 05:59:43,570 INFO L87 Difference]: Start difference. First operand 25947 states and 60305 transitions. Second operand has 45 states, 45 states have (on average 2.8444444444444446) internal successors, (128), 45 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:45,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:45,282 INFO L93 Difference]: Finished difference Result 36532 states and 85714 transitions. [2022-01-18 05:59:45,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 05:59:45,283 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.8444444444444446) internal successors, (128), 45 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-01-18 05:59:45,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:45,337 INFO L225 Difference]: With dead ends: 36532 [2022-01-18 05:59:45,337 INFO L226 Difference]: Without dead ends: 36520 [2022-01-18 05:59:45,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1438 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=946, Invalid=5534, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 05:59:45,338 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 641 mSDsluCounter, 1530 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 2508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:45,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 838 Invalid, 2508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 05:59:45,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36520 states. [2022-01-18 05:59:45,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36520 to 25202. [2022-01-18 05:59:45,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25202 states, 25201 states have (on average 2.336097773897861) internal successors, (58872), 25201 states have internal predecessors, (58872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:45,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25202 states to 25202 states and 58872 transitions. [2022-01-18 05:59:45,802 INFO L78 Accepts]: Start accepts. Automaton has 25202 states and 58872 transitions. Word has length 51 [2022-01-18 05:59:45,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:45,802 INFO L470 AbstractCegarLoop]: Abstraction has 25202 states and 58872 transitions. [2022-01-18 05:59:45,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.8444444444444446) internal successors, (128), 45 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:45,802 INFO L276 IsEmpty]: Start isEmpty. Operand 25202 states and 58872 transitions. [2022-01-18 05:59:45,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-18 05:59:45,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:45,817 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:45,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-01-18 05:59:46,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:46,031 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:59:46,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:46,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1171523909, now seen corresponding path program 52 times [2022-01-18 05:59:46,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:46,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220773034] [2022-01-18 05:59:46,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:46,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:46,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:46,304 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 17 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:46,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:46,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220773034] [2022-01-18 05:59:46,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220773034] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:46,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287705588] [2022-01-18 05:59:46,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:59:46,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:46,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:46,306 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:59:46,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 05:59:46,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:59:46,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:46,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-18 05:59:46,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 17 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:47,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 25 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:49,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287705588] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:49,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:49,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 24, 24] total 58 [2022-01-18 05:59:49,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386312417] [2022-01-18 05:59:49,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:49,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-18 05:59:49,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:49,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-18 05:59:49,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=793, Invalid=2629, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 05:59:49,818 INFO L87 Difference]: Start difference. First operand 25202 states and 58872 transitions. Second operand has 59 states, 59 states have (on average 2.2542372881355934) internal successors, (133), 58 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:00,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:00:00,617 INFO L93 Difference]: Finished difference Result 34543 states and 81614 transitions. [2022-01-18 06:00:00,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-18 06:00:00,617 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.2542372881355934) internal successors, (133), 58 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have 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 [2022-01-18 06:00:00,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:00:00,672 INFO L225 Difference]: With dead ends: 34543 [2022-01-18 06:00:00,672 INFO L226 Difference]: Without dead ends: 34535 [2022-01-18 06:00:00,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10326 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=6811, Invalid=21581, Unknown=0, NotChecked=0, Total=28392 [2022-01-18 06:00:00,674 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1051 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 4721 mSolverCounterSat, 691 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1051 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 5412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 691 IncrementalHoareTripleChecker+Valid, 4721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:00:00,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1051 Valid, 292 Invalid, 5412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [691 Valid, 4721 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 06:00:00,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34535 states. [2022-01-18 06:00:01,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34535 to 25675. [2022-01-18 06:00:01,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25675 states, 25674 states have (on average 2.361221469190621) internal successors, (60622), 25674 states have internal predecessors, (60622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:01,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25675 states to 25675 states and 60622 transitions. [2022-01-18 06:00:01,258 INFO L78 Accepts]: Start accepts. Automaton has 25675 states and 60622 transitions. Word has length 51 [2022-01-18 06:00:01,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:00:01,259 INFO L470 AbstractCegarLoop]: Abstraction has 25675 states and 60622 transitions. [2022-01-18 06:00:01,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.2542372881355934) internal successors, (133), 58 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:01,259 INFO L276 IsEmpty]: Start isEmpty. Operand 25675 states and 60622 transitions. [2022-01-18 06:00:01,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-18 06:00:01,281 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:00:01,281 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:00:01,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-18 06:00:01,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-01-18 06:00:01,495 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:00:01,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:00:01,495 INFO L85 PathProgramCache]: Analyzing trace with hash -697184709, now seen corresponding path program 53 times [2022-01-18 06:00:01,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:00:01,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366872471] [2022-01-18 06:00:01,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:00:01,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:00:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:01,674 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 79 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 06:00:01,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:00:01,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366872471] [2022-01-18 06:00:01,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366872471] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:00:01,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596382884] [2022-01-18 06:00:01,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:00:01,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:01,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:00:01,678 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:00:01,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 06:00:01,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-01-18 06:00:01,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:00:01,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-18 06:00:01,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:00:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 49 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:02,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:00:03,253 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 49 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:03,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596382884] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:00:03,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:00:03,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 24, 24] total 62 [2022-01-18 06:00:03,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311839839] [2022-01-18 06:00:03,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:00:03,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-18 06:00:03,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:00:03,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-18 06:00:03,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=3161, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 06:00:03,254 INFO L87 Difference]: Start difference. First operand 25675 states and 60622 transitions. Second operand has 63 states, 63 states have (on average 2.238095238095238) internal successors, (141), 62 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) [2022-01-18 06:00:12,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:00:12,018 INFO L93 Difference]: Finished difference Result 79019 states and 180082 transitions. [2022-01-18 06:00:12,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 272 states. [2022-01-18 06:00:12,019 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.238095238095238) internal successors, (141), 62 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 51 [2022-01-18 06:00:12,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:00:12,219 INFO L225 Difference]: With dead ends: 79019 [2022-01-18 06:00:12,219 INFO L226 Difference]: Without dead ends: 78230 [2022-01-18 06:00:12,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 328 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52482 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=27833, Invalid=80737, Unknown=0, NotChecked=0, Total=108570 [2022-01-18 06:00:12,226 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1246 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 2901 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1246 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 3225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 2901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:00:12,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1246 Valid, 441 Invalid, 3225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 2901 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 06:00:12,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78230 states. [2022-01-18 06:00:13,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78230 to 26716. [2022-01-18 06:00:13,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26716 states, 26715 states have (on average 2.348493355792626) internal successors, (62740), 26715 states have internal predecessors, (62740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:13,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26716 states to 26716 states and 62740 transitions. [2022-01-18 06:00:13,215 INFO L78 Accepts]: Start accepts. Automaton has 26716 states and 62740 transitions. Word has length 51 [2022-01-18 06:00:13,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:00:13,215 INFO L470 AbstractCegarLoop]: Abstraction has 26716 states and 62740 transitions. [2022-01-18 06:00:13,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.238095238095238) internal successors, (141), 62 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) [2022-01-18 06:00:13,216 INFO L276 IsEmpty]: Start isEmpty. Operand 26716 states and 62740 transitions. [2022-01-18 06:00:13,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-18 06:00:13,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:00:13,233 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:00:13,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-01-18 06:00:13,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-01-18 06:00:13,452 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:00:13,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:00:13,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1152851267, now seen corresponding path program 54 times [2022-01-18 06:00:13,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:00:13,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655452899] [2022-01-18 06:00:13,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:00:13,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:00:13,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 66 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:13,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:00:13,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655452899] [2022-01-18 06:00:13,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655452899] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:00:13,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009533930] [2022-01-18 06:00:13,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:00:13,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:13,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:00:13,600 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:00:13,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 06:00:13,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-18 06:00:13,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:00:13,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-18 06:00:13,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:00:14,284 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 66 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:14,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:00:15,111 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 74 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:15,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009533930] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:00:15,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:00:15,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24, 24] total 57 [2022-01-18 06:00:15,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529241366] [2022-01-18 06:00:15,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:00:15,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-18 06:00:15,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:00:15,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-18 06:00:15,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 06:00:15,112 INFO L87 Difference]: Start difference. First operand 26716 states and 62740 transitions. Second operand has 58 states, 58 states have (on average 2.293103448275862) internal successors, (133), 57 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:21,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:00:21,107 INFO L93 Difference]: Finished difference Result 32210 states and 74811 transitions. [2022-01-18 06:00:21,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-01-18 06:00:21,107 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.293103448275862) internal successors, (133), 57 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have 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 [2022-01-18 06:00:21,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:00:21,157 INFO L225 Difference]: With dead ends: 32210 [2022-01-18 06:00:21,158 INFO L226 Difference]: Without dead ends: 32204 [2022-01-18 06:00:21,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24859 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=16298, Invalid=48472, Unknown=0, NotChecked=0, Total=64770 [2022-01-18 06:00:21,161 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 646 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 1812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:00:21,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [646 Valid, 199 Invalid, 1812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1606 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 06:00:21,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32204 states. [2022-01-18 06:00:21,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32204 to 25976. [2022-01-18 06:00:21,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25976 states, 25975 states have (on average 2.3487584215591917) internal successors, (61009), 25975 states have internal predecessors, (61009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:21,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25976 states to 25976 states and 61009 transitions. [2022-01-18 06:00:21,699 INFO L78 Accepts]: Start accepts. Automaton has 25976 states and 61009 transitions. Word has length 51 [2022-01-18 06:00:21,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:00:21,699 INFO L470 AbstractCegarLoop]: Abstraction has 25976 states and 61009 transitions. [2022-01-18 06:00:21,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.293103448275862) internal successors, (133), 57 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:21,700 INFO L276 IsEmpty]: Start isEmpty. Operand 25976 states and 61009 transitions. [2022-01-18 06:00:21,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 06:00:21,722 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:00:21,722 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:00:21,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-01-18 06:00:21,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:21,924 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:00:21,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:00:21,925 INFO L85 PathProgramCache]: Analyzing trace with hash 2117849603, now seen corresponding path program 55 times [2022-01-18 06:00:21,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:00:21,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562768541] [2022-01-18 06:00:21,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:00:21,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:00:21,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:22,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:00:22,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562768541] [2022-01-18 06:00:22,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562768541] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:00:22,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101887150] [2022-01-18 06:00:22,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:00:22,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:22,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:00:22,131 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:00:22,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 06:00:22,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:22,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-18 06:00:22,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:00:22,696 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:22,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:00:23,329 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 90 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:23,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101887150] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:00:23,330 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:00:23,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 24] total 66 [2022-01-18 06:00:23,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649799900] [2022-01-18 06:00:23,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:00:23,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-18 06:00:23,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:00:23,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-18 06:00:23,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=3587, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 06:00:23,331 INFO L87 Difference]: Start difference. First operand 25976 states and 61009 transitions. Second operand has 67 states, 67 states have (on average 2.1791044776119404) internal successors, (146), 66 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:29,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:00:29,651 INFO L93 Difference]: Finished difference Result 31601 states and 72593 transitions. [2022-01-18 06:00:29,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2022-01-18 06:00:29,652 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1791044776119404) internal successors, (146), 66 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 06:00:29,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:00:29,699 INFO L225 Difference]: With dead ends: 31601 [2022-01-18 06:00:29,699 INFO L226 Difference]: Without dead ends: 30794 [2022-01-18 06:00:29,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26120 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=17002, Invalid=52958, Unknown=0, NotChecked=0, Total=69960 [2022-01-18 06:00:29,705 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 765 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 2431 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 2583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 2431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:00:29,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 338 Invalid, 2583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2431 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 06:00:29,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30794 states. [2022-01-18 06:00:30,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30794 to 25945. [2022-01-18 06:00:30,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25945 states, 25944 states have (on average 2.3479031760715388) internal successors, (60914), 25944 states have internal predecessors, (60914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:30,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25945 states to 25945 states and 60914 transitions. [2022-01-18 06:00:30,235 INFO L78 Accepts]: Start accepts. Automaton has 25945 states and 60914 transitions. Word has length 53 [2022-01-18 06:00:30,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:00:30,235 INFO L470 AbstractCegarLoop]: Abstraction has 25945 states and 60914 transitions. [2022-01-18 06:00:30,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.1791044776119404) internal successors, (146), 66 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:30,235 INFO L276 IsEmpty]: Start isEmpty. Operand 25945 states and 60914 transitions. [2022-01-18 06:00:30,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 06:00:30,250 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:00:30,250 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:00:30,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-01-18 06:00:30,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:30,463 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:00:30,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:00:30,464 INFO L85 PathProgramCache]: Analyzing trace with hash -226669163, now seen corresponding path program 56 times [2022-01-18 06:00:30,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:00:30,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747828382] [2022-01-18 06:00:30,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:00:30,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:00:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:30,591 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:30,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:00:30,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747828382] [2022-01-18 06:00:30,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747828382] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:00:30,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21391457] [2022-01-18 06:00:30,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:00:30,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:30,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:00:30,593 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:00:30,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 06:00:30,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:00:30,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:00:30,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 06:00:30,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:00:31,346 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:31,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:00:32,314 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:32,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21391457] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:00:32,315 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:00:32,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 24, 23] total 55 [2022-01-18 06:00:32,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721529704] [2022-01-18 06:00:32,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:00:32,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-18 06:00:32,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:00:32,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-18 06:00:32,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=2334, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 06:00:32,316 INFO L87 Difference]: Start difference. First operand 25945 states and 60914 transitions. Second operand has 56 states, 56 states have (on average 2.4642857142857144) internal successors, (138), 55 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:36,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:00:36,440 INFO L93 Difference]: Finished difference Result 27616 states and 64299 transitions. [2022-01-18 06:00:36,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-01-18 06:00:36,440 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.4642857142857144) internal successors, (138), 55 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 06:00:36,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:00:36,495 INFO L225 Difference]: With dead ends: 27616 [2022-01-18 06:00:36,495 INFO L226 Difference]: Without dead ends: 27612 [2022-01-18 06:00:36,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13769 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10216, Invalid=28790, Unknown=0, NotChecked=0, Total=39006 [2022-01-18 06:00:36,501 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 470 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:00:36,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 123 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 06:00:36,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27612 states. [2022-01-18 06:00:37,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27612 to 25945. [2022-01-18 06:00:37,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25945 states, 25944 states have (on average 2.347787542399013) internal successors, (60911), 25944 states have internal predecessors, (60911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:37,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25945 states to 25945 states and 60911 transitions. [2022-01-18 06:00:37,284 INFO L78 Accepts]: Start accepts. Automaton has 25945 states and 60911 transitions. Word has length 53 [2022-01-18 06:00:37,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:00:37,284 INFO L470 AbstractCegarLoop]: Abstraction has 25945 states and 60911 transitions. [2022-01-18 06:00:37,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.4642857142857144) internal successors, (138), 55 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:37,284 INFO L276 IsEmpty]: Start isEmpty. Operand 25945 states and 60911 transitions. [2022-01-18 06:00:37,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-18 06:00:37,311 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:00:37,311 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:00:37,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-18 06:00:37,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:37,527 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:00:37,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:00:37,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1484254207, now seen corresponding path program 57 times [2022-01-18 06:00:37,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:00:37,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191439367] [2022-01-18 06:00:37,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:00:37,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:00:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:37,656 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 1 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:37,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:00:37,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191439367] [2022-01-18 06:00:37,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191439367] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:00:37,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135190374] [2022-01-18 06:00:37,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:00:37,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:37,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:00:37,658 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:00:37,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 06:00:37,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-18 06:00:37,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:00:37,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 06:00:37,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:00:37,955 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:37,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:00:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 81 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:38,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135190374] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:00:38,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:00:38,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 16] total 29 [2022-01-18 06:00:38,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124075905] [2022-01-18 06:00:38,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:00:38,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 06:00:38,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:00:38,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 06:00:38,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2022-01-18 06:00:38,174 INFO L87 Difference]: Start difference. First operand 25945 states and 60911 transitions. Second operand has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 29 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:38,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:00:38,734 INFO L93 Difference]: Finished difference Result 36620 states and 86993 transitions. [2022-01-18 06:00:38,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 06:00:38,734 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 29 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have 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 [2022-01-18 06:00:38,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:00:38,804 INFO L225 Difference]: With dead ends: 36620 [2022-01-18 06:00:38,804 INFO L226 Difference]: Without dead ends: 36529 [2022-01-18 06:00:38,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 100 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=1287, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:00:38,805 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 307 mSDsluCounter, 1637 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:00:38,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 1263 Invalid, 1269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:00:38,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36529 states. [2022-01-18 06:00:39,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36529 to 31629. [2022-01-18 06:00:39,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31629 states, 31628 states have (on average 2.3720753762488935) internal successors, (75024), 31628 states have internal predecessors, (75024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:39,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31629 states to 31629 states and 75024 transitions. [2022-01-18 06:00:39,556 INFO L78 Accepts]: Start accepts. Automaton has 31629 states and 75024 transitions. Word has length 55 [2022-01-18 06:00:39,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:00:39,556 INFO L470 AbstractCegarLoop]: Abstraction has 31629 states and 75024 transitions. [2022-01-18 06:00:39,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 29 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:39,557 INFO L276 IsEmpty]: Start isEmpty. Operand 31629 states and 75024 transitions. [2022-01-18 06:00:39,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-18 06:00:39,587 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:00:39,587 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:00:39,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-01-18 06:00:39,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-01-18 06:00:39,804 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:00:39,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:00:39,804 INFO L85 PathProgramCache]: Analyzing trace with hash 783619073, now seen corresponding path program 58 times [2022-01-18 06:00:39,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:00:39,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893520581] [2022-01-18 06:00:39,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:00:39,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:00:39,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:40,207 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:40,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:00:40,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893520581] [2022-01-18 06:00:40,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893520581] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:00:40,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331689710] [2022-01-18 06:00:40,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:00:40,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:40,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:00:40,209 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:00:40,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 06:00:40,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:00:40,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:00:40,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 58 conjunts are in the unsatisfiable core [2022-01-18 06:00:40,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:00:41,098 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:41,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:00:45,179 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 28 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:45,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331689710] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:00:45,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:00:45,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 26] total 69 [2022-01-18 06:00:45,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055822374] [2022-01-18 06:00:45,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:00:45,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-18 06:00:45,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:00:45,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-18 06:00:45,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1173, Invalid=3657, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 06:00:45,182 INFO L87 Difference]: Start difference. First operand 31629 states and 75024 transitions. Second operand has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 69 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:00,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:01:00,166 INFO L93 Difference]: Finished difference Result 48125 states and 112362 transitions. [2022-01-18 06:01:00,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-18 06:01:00,166 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 69 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-01-18 06:01:00,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:01:00,330 INFO L225 Difference]: With dead ends: 48125 [2022-01-18 06:01:00,330 INFO L226 Difference]: Without dead ends: 48119 [2022-01-18 06:01:00,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6059 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=5215, Invalid=14245, Unknown=0, NotChecked=0, Total=19460 [2022-01-18 06:01:00,331 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 844 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 3305 mSolverCounterSat, 574 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 3879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 574 IncrementalHoareTripleChecker+Valid, 3305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:01:00,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [844 Valid, 254 Invalid, 3879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [574 Valid, 3305 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 06:01:00,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48119 states. [2022-01-18 06:01:00,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48119 to 36125. [2022-01-18 06:01:00,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36125 states, 36124 states have (on average 2.3701140516000443) internal successors, (85618), 36124 states have internal predecessors, (85618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:00,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36125 states to 36125 states and 85618 transitions. [2022-01-18 06:01:00,961 INFO L78 Accepts]: Start accepts. Automaton has 36125 states and 85618 transitions. Word has length 55 [2022-01-18 06:01:00,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:01:00,961 INFO L470 AbstractCegarLoop]: Abstraction has 36125 states and 85618 transitions. [2022-01-18 06:01:00,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 69 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:00,961 INFO L276 IsEmpty]: Start isEmpty. Operand 36125 states and 85618 transitions. [2022-01-18 06:01:00,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-18 06:01:00,989 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:01:00,989 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:01:01,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-01-18 06:01:01,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-01-18 06:01:01,191 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:01:01,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:01:01,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1260759283, now seen corresponding path program 59 times [2022-01-18 06:01:01,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:01:01,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960567454] [2022-01-18 06:01:01,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:01:01,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:01:01,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:01:01,363 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 88 proven. 113 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 06:01:01,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:01:01,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960567454] [2022-01-18 06:01:01,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960567454] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:01:01,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273154147] [2022-01-18 06:01:01,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:01:01,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:01,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:01:01,365 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:01:01,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 06:01:01,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-01-18 06:01:01,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:01:01,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 53 conjunts are in the unsatisfiable core [2022-01-18 06:01:01,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:01:02,163 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 56 proven. 146 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 06:01:02,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:01:04,240 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 64 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:04,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273154147] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:01:04,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:01:04,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 24, 26] total 63 [2022-01-18 06:01:04,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940539393] [2022-01-18 06:01:04,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:01:04,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-18 06:01:04,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:01:04,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-18 06:01:04,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=977, Invalid=3055, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 06:01:04,241 INFO L87 Difference]: Start difference. First operand 36125 states and 85618 transitions. Second operand has 64 states, 64 states have (on average 2.28125) internal successors, (146), 63 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:20,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:01:20,945 INFO L93 Difference]: Finished difference Result 92096 states and 212175 transitions. [2022-01-18 06:01:20,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 247 states. [2022-01-18 06:01:20,945 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.28125) internal successors, (146), 63 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-01-18 06:01:20,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:01:21,145 INFO L225 Difference]: With dead ends: 92096 [2022-01-18 06:01:21,145 INFO L226 Difference]: Without dead ends: 91757 [2022-01-18 06:01:21,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48591 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=28862, Invalid=64468, Unknown=0, NotChecked=0, Total=93330 [2022-01-18 06:01:21,149 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1458 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 3203 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1458 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 3623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 3203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:01:21,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1458 Valid, 664 Invalid, 3623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 3203 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-18 06:01:21,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91757 states. [2022-01-18 06:01:22,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91757 to 46870. [2022-01-18 06:01:22,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46870 states, 46869 states have (on average 2.361091553052124) internal successors, (110662), 46869 states have internal predecessors, (110662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:22,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46870 states to 46870 states and 110662 transitions. [2022-01-18 06:01:22,386 INFO L78 Accepts]: Start accepts. Automaton has 46870 states and 110662 transitions. Word has length 55 [2022-01-18 06:01:22,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:01:22,387 INFO L470 AbstractCegarLoop]: Abstraction has 46870 states and 110662 transitions. [2022-01-18 06:01:22,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.28125) internal successors, (146), 63 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:22,387 INFO L276 IsEmpty]: Start isEmpty. Operand 46870 states and 110662 transitions. [2022-01-18 06:01:22,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-18 06:01:22,423 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:01:22,423 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:01:22,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-01-18 06:01:22,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:22,629 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:01:22,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:01:22,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1421025927, now seen corresponding path program 60 times [2022-01-18 06:01:22,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:01:22,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030414039] [2022-01-18 06:01:22,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:01:22,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:01:22,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:01:22,824 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 68 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:22,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:01:22,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030414039] [2022-01-18 06:01:22,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030414039] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:01:22,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817185133] [2022-01-18 06:01:22,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:01:22,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:22,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:01:22,827 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:01:22,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 06:01:22,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-01-18 06:01:22,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:01:22,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 06:01:22,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:01:23,575 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 68 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:23,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:01:24,341 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 77 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:24,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817185133] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:01:24,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:01:24,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 26, 26] total 63 [2022-01-18 06:01:24,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095093015] [2022-01-18 06:01:24,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:01:24,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-18 06:01:24,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:01:24,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-18 06:01:24,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=3166, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 06:01:24,343 INFO L87 Difference]: Start difference. First operand 46870 states and 110662 transitions. Second operand has 64 states, 64 states have (on average 2.265625) internal successors, (145), 63 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:34,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:01:34,197 INFO L93 Difference]: Finished difference Result 76643 states and 178884 transitions. [2022-01-18 06:01:34,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2022-01-18 06:01:34,197 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.265625) internal successors, (145), 63 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have 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 [2022-01-18 06:01:34,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:01:34,371 INFO L225 Difference]: With dead ends: 76643 [2022-01-18 06:01:34,372 INFO L226 Difference]: Without dead ends: 76637 [2022-01-18 06:01:34,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29944 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=18642, Invalid=61164, Unknown=0, NotChecked=0, Total=79806 [2022-01-18 06:01:34,376 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 907 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 2912 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 3291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 2912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:01:34,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [907 Valid, 638 Invalid, 3291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 2912 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 06:01:34,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76637 states. [2022-01-18 06:01:35,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76637 to 45819. [2022-01-18 06:01:35,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45819 states, 45818 states have (on average 2.363874459819285) internal successors, (108308), 45818 states have internal predecessors, (108308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:35,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45819 states to 45819 states and 108308 transitions. [2022-01-18 06:01:35,469 INFO L78 Accepts]: Start accepts. Automaton has 45819 states and 108308 transitions. Word has length 55 [2022-01-18 06:01:35,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:01:35,469 INFO L470 AbstractCegarLoop]: Abstraction has 45819 states and 108308 transitions. [2022-01-18 06:01:35,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.265625) internal successors, (145), 63 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:35,469 INFO L276 IsEmpty]: Start isEmpty. Operand 45819 states and 108308 transitions. [2022-01-18 06:01:35,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-18 06:01:35,502 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:01:35,502 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:01:35,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-01-18 06:01:35,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:35,711 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:01:35,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:01:35,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1501623287, now seen corresponding path program 61 times [2022-01-18 06:01:35,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:01:35,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159092102] [2022-01-18 06:01:35,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:01:35,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:01:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:01:35,985 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 72 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:35,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:01:35,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159092102] [2022-01-18 06:01:35,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159092102] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:01:35,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531389765] [2022-01-18 06:01:35,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:01:35,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:35,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:01:35,986 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:01:35,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 06:01:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:01:36,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-18 06:01:36,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:01:36,820 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 72 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:36,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:01:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 81 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:37,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531389765] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:01:37,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:01:37,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 28] total 73 [2022-01-18 06:01:37,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896916194] [2022-01-18 06:01:37,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:01:37,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-18 06:01:37,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:01:37,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-18 06:01:37,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=913, Invalid=4489, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 06:01:37,836 INFO L87 Difference]: Start difference. First operand 45819 states and 108308 transitions. Second operand has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:45,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:01:45,795 INFO L93 Difference]: Finished difference Result 61421 states and 141782 transitions. [2022-01-18 06:01:45,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2022-01-18 06:01:45,795 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have 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 [2022-01-18 06:01:45,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:01:45,896 INFO L225 Difference]: With dead ends: 61421 [2022-01-18 06:01:45,896 INFO L226 Difference]: Without dead ends: 59909 [2022-01-18 06:01:45,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31582 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=20947, Invalid=63443, Unknown=0, NotChecked=0, Total=84390 [2022-01-18 06:01:45,898 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 935 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 2580 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 2825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 2580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:01:45,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [935 Valid, 433 Invalid, 2825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 2580 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 06:01:45,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59909 states. [2022-01-18 06:01:46,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59909 to 44402. [2022-01-18 06:01:46,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44402 states, 44401 states have (on average 2.3558027972342965) internal successors, (104600), 44401 states have internal predecessors, (104600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:46,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44402 states to 44402 states and 104600 transitions. [2022-01-18 06:01:46,796 INFO L78 Accepts]: Start accepts. Automaton has 44402 states and 104600 transitions. Word has length 55 [2022-01-18 06:01:46,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:01:46,796 INFO L470 AbstractCegarLoop]: Abstraction has 44402 states and 104600 transitions. [2022-01-18 06:01:46,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:46,796 INFO L276 IsEmpty]: Start isEmpty. Operand 44402 states and 104600 transitions. [2022-01-18 06:01:46,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-18 06:01:46,843 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:01:46,844 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:01:46,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-01-18 06:01:47,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:47,064 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:01:47,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:01:47,065 INFO L85 PathProgramCache]: Analyzing trace with hash 554537791, now seen corresponding path program 62 times [2022-01-18 06:01:47,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:01:47,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442574921] [2022-01-18 06:01:47,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:01:47,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:01:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:01:47,306 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:47,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:01:47,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442574921] [2022-01-18 06:01:47,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442574921] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:01:47,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206505122] [2022-01-18 06:01:47,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:01:47,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:47,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:01:47,308 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:01:47,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 06:01:47,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:01:47,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:01:47,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 46 conjunts are in the unsatisfiable core [2022-01-18 06:01:47,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:01:48,391 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:48,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:01:49,180 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 110 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:49,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206505122] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:01:49,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:01:49,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 26] total 72 [2022-01-18 06:01:49,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112112325] [2022-01-18 06:01:49,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:01:49,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-18 06:01:49,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:01:49,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-18 06:01:49,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=983, Invalid=4273, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 06:01:49,182 INFO L87 Difference]: Start difference. First operand 44402 states and 104600 transitions. Second operand has 73 states, 73 states have (on average 2.164383561643836) internal successors, (158), 72 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:57,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:01:57,705 INFO L93 Difference]: Finished difference Result 50011 states and 116036 transitions. [2022-01-18 06:01:57,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2022-01-18 06:01:57,705 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.164383561643836) internal successors, (158), 72 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-01-18 06:01:57,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:01:57,793 INFO L225 Difference]: With dead ends: 50011 [2022-01-18 06:01:57,794 INFO L226 Difference]: Without dead ends: 48994 [2022-01-18 06:01:57,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36195 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=22845, Invalid=71097, Unknown=0, NotChecked=0, Total=93942 [2022-01-18 06:01:57,797 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1228 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 2001 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1228 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 2191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 2001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:01:57,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1228 Valid, 309 Invalid, 2191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 2001 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 06:01:57,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48994 states. [2022-01-18 06:01:58,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48994 to 44076. [2022-01-18 06:01:58,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44076 states, 44075 states have (on average 2.3537379466817923) internal successors, (103741), 44075 states have internal predecessors, (103741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:58,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44076 states to 44076 states and 103741 transitions. [2022-01-18 06:01:58,809 INFO L78 Accepts]: Start accepts. Automaton has 44076 states and 103741 transitions. Word has length 57 [2022-01-18 06:01:58,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:01:58,809 INFO L470 AbstractCegarLoop]: Abstraction has 44076 states and 103741 transitions. [2022-01-18 06:01:58,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.164383561643836) internal successors, (158), 72 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:58,809 INFO L276 IsEmpty]: Start isEmpty. Operand 44076 states and 103741 transitions. [2022-01-18 06:01:58,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-18 06:01:58,850 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:01:58,850 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:01:58,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-01-18 06:01:59,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:59,067 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:01:59,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:01:59,067 INFO L85 PathProgramCache]: Analyzing trace with hash -880443627, now seen corresponding path program 63 times [2022-01-18 06:01:59,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:01:59,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484262693] [2022-01-18 06:01:59,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:01:59,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:01:59,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:01:59,270 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:59,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:01:59,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484262693] [2022-01-18 06:01:59,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484262693] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:01:59,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943908100] [2022-01-18 06:01:59,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:01:59,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:59,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:01:59,271 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:01:59,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 06:01:59,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-01-18 06:01:59,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:01:59,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 62 conjunts are in the unsatisfiable core [2022-01-18 06:01:59,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:02:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 21 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:00,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:02:01,877 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 31 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:01,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943908100] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:02:01,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:02:01,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 27, 27] total 63 [2022-01-18 06:02:01,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589790012] [2022-01-18 06:02:01,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:02:01,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-18 06:02:01,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:02:01,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-18 06:02:01,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=852, Invalid=3180, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 06:02:01,879 INFO L87 Difference]: Start difference. First operand 44076 states and 103741 transitions. Second operand has 64 states, 64 states have (on average 2.359375) internal successors, (151), 63 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:11,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:02:11,312 INFO L93 Difference]: Finished difference Result 50542 states and 118060 transitions. [2022-01-18 06:02:11,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 267 states. [2022-01-18 06:02:11,312 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.359375) internal successors, (151), 63 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-01-18 06:02:11,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:02:11,392 INFO L225 Difference]: With dead ends: 50542 [2022-01-18 06:02:11,392 INFO L226 Difference]: Without dead ends: 50538 [2022-01-18 06:02:11,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 324 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43971 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=26436, Invalid=79514, Unknown=0, NotChecked=0, Total=105950 [2022-01-18 06:02:11,396 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 1019 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 3665 mSolverCounterSat, 371 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1019 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 4036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 3665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:02:11,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1019 Valid, 680 Invalid, 4036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 3665 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-18 06:02:11,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50538 states. [2022-01-18 06:02:12,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50538 to 44017. [2022-01-18 06:02:12,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44017 states, 44016 states have (on average 2.3667984369320245) internal successors, (104177), 44016 states have internal predecessors, (104177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:12,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44017 states to 44017 states and 104177 transitions. [2022-01-18 06:02:12,310 INFO L78 Accepts]: Start accepts. Automaton has 44017 states and 104177 transitions. Word has length 57 [2022-01-18 06:02:12,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:02:12,310 INFO L470 AbstractCegarLoop]: Abstraction has 44017 states and 104177 transitions. [2022-01-18 06:02:12,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.359375) internal successors, (151), 63 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:12,311 INFO L276 IsEmpty]: Start isEmpty. Operand 44017 states and 104177 transitions. [2022-01-18 06:02:12,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-18 06:02:12,362 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:02:12,362 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:02:12,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-18 06:02:12,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-01-18 06:02:12,578 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:02:12,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:02:12,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1275848881, now seen corresponding path program 64 times [2022-01-18 06:02:12,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:02:12,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481432244] [2022-01-18 06:02:12,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:02:12,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:02:12,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:02:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 89 proven. 127 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 06:02:12,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:02:12,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481432244] [2022-01-18 06:02:12,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481432244] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:02:12,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378177331] [2022-01-18 06:02:12,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:02:12,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:12,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:02:12,815 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:02:12,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 06:02:12,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:02:12,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:02:12,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 44 conjunts are in the unsatisfiable core [2022-01-18 06:02:12,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:02:13,756 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 56 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:13,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:02:15,076 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 72 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:15,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378177331] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:02:15,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:02:15,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 26, 28] total 71 [2022-01-18 06:02:15,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275751994] [2022-01-18 06:02:15,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:02:15,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-18 06:02:15,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:02:15,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-18 06:02:15,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=880, Invalid=4232, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 06:02:15,077 INFO L87 Difference]: Start difference. First operand 44017 states and 104177 transitions. Second operand has 72 states, 72 states have (on average 2.1805555555555554) internal successors, (157), 71 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) [2022-01-18 06:02:26,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:02:26,034 INFO L93 Difference]: Finished difference Result 93082 states and 211418 transitions. [2022-01-18 06:02:26,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 259 states. [2022-01-18 06:02:26,035 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.1805555555555554) internal successors, (157), 71 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 57 [2022-01-18 06:02:26,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:02:26,275 INFO L225 Difference]: With dead ends: 93082 [2022-01-18 06:02:26,275 INFO L226 Difference]: Without dead ends: 91810 [2022-01-18 06:02:26,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 324 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44504 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=25610, Invalid=80340, Unknown=0, NotChecked=0, Total=105950 [2022-01-18 06:02:26,280 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 1388 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 3548 mSolverCounterSat, 560 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1388 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 4108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 560 IncrementalHoareTripleChecker+Valid, 3548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:02:26,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1388 Valid, 438 Invalid, 4108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [560 Valid, 3548 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-18 06:02:26,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91810 states. [2022-01-18 06:02:27,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91810 to 44442. [2022-01-18 06:02:27,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44442 states, 44441 states have (on average 2.3639207038545487) internal successors, (105055), 44441 states have internal predecessors, (105055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:27,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44442 states to 44442 states and 105055 transitions. [2022-01-18 06:02:27,743 INFO L78 Accepts]: Start accepts. Automaton has 44442 states and 105055 transitions. Word has length 57 [2022-01-18 06:02:27,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:02:27,743 INFO L470 AbstractCegarLoop]: Abstraction has 44442 states and 105055 transitions. [2022-01-18 06:02:27,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.1805555555555554) internal successors, (157), 71 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) [2022-01-18 06:02:27,743 INFO L276 IsEmpty]: Start isEmpty. Operand 44442 states and 105055 transitions. [2022-01-18 06:02:27,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-18 06:02:27,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:02:27,805 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:02:27,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-01-18 06:02:28,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:28,011 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:02:28,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:02:28,012 INFO L85 PathProgramCache]: Analyzing trace with hash 38084029, now seen corresponding path program 65 times [2022-01-18 06:02:28,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:02:28,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438973340] [2022-01-18 06:02:28,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:02:28,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:02:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:02:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 98 proven. 113 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-18 06:02:28,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:02:28,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438973340] [2022-01-18 06:02:28,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438973340] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:02:28,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118586397] [2022-01-18 06:02:28,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:02:28,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:28,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:02:28,201 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:02:28,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 06:02:28,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-01-18 06:02:28,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:02:28,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-18 06:02:28,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:02:28,926 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 49 proven. 170 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:02:28,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:02:30,206 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 49 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:30,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118586397] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:02:30,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:02:30,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26, 27] total 66 [2022-01-18 06:02:30,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136854718] [2022-01-18 06:02:30,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:02:30,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-18 06:02:30,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:02:30,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-18 06:02:30,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=794, Invalid=3628, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 06:02:30,208 INFO L87 Difference]: Start difference. First operand 44442 states and 105055 transitions. Second operand has 67 states, 67 states have (on average 2.283582089552239) internal successors, (153), 66 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:38,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:02:38,014 INFO L93 Difference]: Finished difference Result 124942 states and 283588 transitions. [2022-01-18 06:02:38,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2022-01-18 06:02:38,014 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.283582089552239) internal successors, (153), 66 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-01-18 06:02:38,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:02:38,574 INFO L225 Difference]: With dead ends: 124942 [2022-01-18 06:02:38,574 INFO L226 Difference]: Without dead ends: 124468 [2022-01-18 06:02:38,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31245 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=18217, Invalid=55495, Unknown=0, NotChecked=0, Total=73712 [2022-01-18 06:02:38,578 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1125 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 2969 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1125 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 3332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 2969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:02:38,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1125 Valid, 530 Invalid, 3332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 2969 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 06:02:38,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124468 states. [2022-01-18 06:02:40,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124468 to 53214. [2022-01-18 06:02:40,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53214 states, 53213 states have (on average 2.3461935993084397) internal successors, (124848), 53213 states have internal predecessors, (124848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:40,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53214 states to 53214 states and 124848 transitions. [2022-01-18 06:02:40,183 INFO L78 Accepts]: Start accepts. Automaton has 53214 states and 124848 transitions. Word has length 57 [2022-01-18 06:02:40,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:02:40,184 INFO L470 AbstractCegarLoop]: Abstraction has 53214 states and 124848 transitions. [2022-01-18 06:02:40,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.283582089552239) internal successors, (153), 66 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:40,184 INFO L276 IsEmpty]: Start isEmpty. Operand 53214 states and 124848 transitions. [2022-01-18 06:02:40,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 06:02:40,229 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:02:40,229 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:02:40,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-01-18 06:02:40,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-01-18 06:02:40,432 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:02:40,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:02:40,432 INFO L85 PathProgramCache]: Analyzing trace with hash -588351939, now seen corresponding path program 66 times [2022-01-18 06:02:40,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:02:40,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804663865] [2022-01-18 06:02:40,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:02:40,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:02:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:02:40,594 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 1 proven. 241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:40,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:02:40,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804663865] [2022-01-18 06:02:40,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804663865] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:02:40,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686459165] [2022-01-18 06:02:40,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:02:40,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:40,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:02:40,596 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:02:40,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 06:02:40,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-01-18 06:02:40,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:02:40,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-18 06:02:40,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:02:41,070 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 64 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:41,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:02:41,269 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 100 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:41,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686459165] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:02:41,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:02:41,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24, 17] total 31 [2022-01-18 06:02:41,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706709057] [2022-01-18 06:02:41,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:02:41,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 06:02:41,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:02:41,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 06:02:41,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=683, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:02:41,274 INFO L87 Difference]: Start difference. First operand 53214 states and 124848 transitions. Second operand has 31 states, 31 states have (on average 3.7419354838709675) 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) [2022-01-18 06:02:42,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:02:42,173 INFO L93 Difference]: Finished difference Result 71485 states and 169894 transitions. [2022-01-18 06:02:42,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 06:02:42,173 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.7419354838709675) 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 59 [2022-01-18 06:02:42,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:02:42,354 INFO L225 Difference]: With dead ends: 71485 [2022-01-18 06:02:42,354 INFO L226 Difference]: Without dead ends: 71391 [2022-01-18 06:02:42,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 108 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=400, Invalid=1492, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 06:02:42,354 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 321 mSDsluCounter, 2018 mSDsCounter, 0 mSdLazyCounter, 1492 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1539 SdHoareTripleChecker+Invalid, 1551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:02:42,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 1539 Invalid, 1551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1492 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:02:42,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71391 states. [2022-01-18 06:02:43,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71391 to 63187. [2022-01-18 06:02:43,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63187 states, 63186 states have (on average 2.3767606748330325) internal successors, (150178), 63186 states have internal predecessors, (150178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:43,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63187 states to 63187 states and 150178 transitions. [2022-01-18 06:02:43,775 INFO L78 Accepts]: Start accepts. Automaton has 63187 states and 150178 transitions. Word has length 59 [2022-01-18 06:02:43,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:02:43,775 INFO L470 AbstractCegarLoop]: Abstraction has 63187 states and 150178 transitions. [2022-01-18 06:02:43,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.7419354838709675) 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) [2022-01-18 06:02:43,775 INFO L276 IsEmpty]: Start isEmpty. Operand 63187 states and 150178 transitions. [2022-01-18 06:02:43,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 06:02:43,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:02:43,862 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:02:43,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-01-18 06:02:44,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-01-18 06:02:44,077 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:02:44,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:02:44,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1987137683, now seen corresponding path program 67 times [2022-01-18 06:02:44,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:02:44,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675286109] [2022-01-18 06:02:44,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:02:44,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:02:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:02:44,418 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:44,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:02:44,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675286109] [2022-01-18 06:02:44,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675286109] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:02:44,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361783782] [2022-01-18 06:02:44,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:02:44,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:44,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:02:44,421 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:02:44,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 06:02:44,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:02:44,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 64 conjunts are in the unsatisfiable core [2022-01-18 06:02:44,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:02:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:45,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:02:50,486 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 2 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:50,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361783782] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:02:50,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:02:50,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27, 28] total 68 [2022-01-18 06:02:50,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037580186] [2022-01-18 06:02:50,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:02:50,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-18 06:02:50,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:02:50,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-18 06:02:50,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=987, Invalid=3705, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 06:02:50,487 INFO L87 Difference]: Start difference. First operand 63187 states and 150178 transitions. Second operand has 69 states, 69 states have (on average 2.3768115942028984) internal successors, (164), 68 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:16,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:03:16,084 INFO L93 Difference]: Finished difference Result 117551 states and 276843 transitions. [2022-01-18 06:03:16,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 213 states. [2022-01-18 06:03:16,085 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.3768115942028984) internal successors, (164), 68 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 06:03:16,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:03:16,531 INFO L225 Difference]: With dead ends: 117551 [2022-01-18 06:03:16,532 INFO L226 Difference]: Without dead ends: 117509 [2022-01-18 06:03:16,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29336 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=14373, Invalid=62079, Unknown=0, NotChecked=0, Total=76452 [2022-01-18 06:03:16,534 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 2080 mSDsluCounter, 2916 mSDsCounter, 0 mSdLazyCounter, 10758 mSolverCounterSat, 993 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2080 SdHoareTripleChecker+Valid, 1543 SdHoareTripleChecker+Invalid, 11751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 993 IncrementalHoareTripleChecker+Valid, 10758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:03:16,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2080 Valid, 1543 Invalid, 11751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [993 Valid, 10758 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-01-18 06:03:16,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117509 states. [2022-01-18 06:03:18,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117509 to 78669. [2022-01-18 06:03:18,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78669 states, 78668 states have (on average 2.4081202013525194) internal successors, (189442), 78668 states have internal predecessors, (189442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:18,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78669 states to 78669 states and 189442 transitions. [2022-01-18 06:03:18,676 INFO L78 Accepts]: Start accepts. Automaton has 78669 states and 189442 transitions. Word has length 59 [2022-01-18 06:03:18,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:03:18,676 INFO L470 AbstractCegarLoop]: Abstraction has 78669 states and 189442 transitions. [2022-01-18 06:03:18,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.3768115942028984) internal successors, (164), 68 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:18,677 INFO L276 IsEmpty]: Start isEmpty. Operand 78669 states and 189442 transitions. [2022-01-18 06:03:19,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 06:03:19,054 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:03:19,054 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:03:19,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-01-18 06:03:19,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-01-18 06:03:19,271 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:03:19,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:03:19,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1256771773, now seen corresponding path program 68 times [2022-01-18 06:03:19,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:03:19,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075334737] [2022-01-18 06:03:19,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:03:19,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:03:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:03:19,681 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 21 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:19,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:03:19,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075334737] [2022-01-18 06:03:19,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075334737] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:03:19,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722290813] [2022-01-18 06:03:19,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:03:19,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:19,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:03:19,683 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:03:19,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 06:03:19,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:03:19,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:03:19,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 64 conjunts are in the unsatisfiable core [2022-01-18 06:03:19,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:03:20,715 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 21 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:20,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:03:26,070 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 31 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:26,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722290813] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:03:26,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:03:26,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 28, 28] total 68 [2022-01-18 06:03:26,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765196735] [2022-01-18 06:03:26,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:03:26,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-18 06:03:26,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:03:26,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-18 06:03:26,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1098, Invalid=3594, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 06:03:26,072 INFO L87 Difference]: Start difference. First operand 78669 states and 189442 transitions. Second operand has 69 states, 69 states have (on average 2.2753623188405796) internal successors, (157), 68 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) [2022-01-18 06:03:46,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:03:46,519 INFO L93 Difference]: Finished difference Result 93467 states and 225521 transitions. [2022-01-18 06:03:46,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-01-18 06:03:46,520 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.2753623188405796) internal successors, (157), 68 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 59 [2022-01-18 06:03:46,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:03:46,727 INFO L225 Difference]: With dead ends: 93467 [2022-01-18 06:03:46,727 INFO L226 Difference]: Without dead ends: 93445 [2022-01-18 06:03:46,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18272 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=11684, Invalid=37822, Unknown=0, NotChecked=0, Total=49506 [2022-01-18 06:03:46,738 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 1389 mSDsluCounter, 1787 mSDsCounter, 0 mSdLazyCounter, 7658 mSolverCounterSat, 878 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1389 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 8536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 878 IncrementalHoareTripleChecker+Valid, 7658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:03:46,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1389 Valid, 852 Invalid, 8536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [878 Valid, 7658 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-01-18 06:03:46,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93445 states. [2022-01-18 06:03:48,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93445 to 69713. [2022-01-18 06:03:48,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69713 states, 69712 states have (on average 2.4034742942391554) internal successors, (167551), 69712 states have internal predecessors, (167551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:48,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69713 states to 69713 states and 167551 transitions. [2022-01-18 06:03:48,370 INFO L78 Accepts]: Start accepts. Automaton has 69713 states and 167551 transitions. Word has length 59 [2022-01-18 06:03:48,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:03:48,370 INFO L470 AbstractCegarLoop]: Abstraction has 69713 states and 167551 transitions. [2022-01-18 06:03:48,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.2753623188405796) internal successors, (157), 68 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) [2022-01-18 06:03:48,371 INFO L276 IsEmpty]: Start isEmpty. Operand 69713 states and 167551 transitions. [2022-01-18 06:03:48,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 06:03:48,424 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:03:48,424 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:03:48,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-01-18 06:03:48,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-01-18 06:03:48,641 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:03:48,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:03:48,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1300336407, now seen corresponding path program 69 times [2022-01-18 06:03:48,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:03:48,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263158908] [2022-01-18 06:03:48,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:03:48,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:03:48,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:03:48,977 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 2 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:48,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:03:48,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263158908] [2022-01-18 06:03:48,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263158908] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:03:48,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724348228] [2022-01-18 06:03:48,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:03:48,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:48,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:03:48,979 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:03:48,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 06:03:49,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-01-18 06:03:49,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:03:49,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 61 conjunts are in the unsatisfiable core [2022-01-18 06:03:49,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:03:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 2 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:49,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:03:54,260 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 6 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:54,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724348228] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:03:54,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:03:54,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27, 28] total 69 [2022-01-18 06:03:54,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540703564] [2022-01-18 06:03:54,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:03:54,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-18 06:03:54,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:03:54,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-18 06:03:54,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=926, Invalid=3904, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 06:03:54,261 INFO L87 Difference]: Start difference. First operand 69713 states and 167551 transitions. Second operand has 70 states, 70 states have (on average 2.3142857142857145) internal successors, (162), 69 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:28,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:04:28,006 INFO L93 Difference]: Finished difference Result 144092 states and 340742 transitions. [2022-01-18 06:04:28,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-01-18 06:04:28,006 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.3142857142857145) internal successors, (162), 69 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 06:04:28,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:04:28,346 INFO L225 Difference]: With dead ends: 144092 [2022-01-18 06:04:28,346 INFO L226 Difference]: Without dead ends: 144011 [2022-01-18 06:04:28,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 340 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47946 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=22207, Invalid=94415, Unknown=0, NotChecked=0, Total=116622 [2022-01-18 06:04:28,349 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 2185 mSDsluCounter, 2485 mSDsCounter, 0 mSdLazyCounter, 12419 mSolverCounterSat, 1163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2185 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 13582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1163 IncrementalHoareTripleChecker+Valid, 12419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:04:28,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2185 Valid, 1244 Invalid, 13582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1163 Valid, 12419 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-01-18 06:04:28,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144011 states. [2022-01-18 06:04:30,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144011 to 88382. [2022-01-18 06:04:30,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88382 states, 88381 states have (on average 2.4319027845351378) internal successors, (214934), 88381 states have internal predecessors, (214934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:31,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88382 states to 88382 states and 214934 transitions. [2022-01-18 06:04:31,031 INFO L78 Accepts]: Start accepts. Automaton has 88382 states and 214934 transitions. Word has length 59 [2022-01-18 06:04:31,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:04:31,032 INFO L470 AbstractCegarLoop]: Abstraction has 88382 states and 214934 transitions. [2022-01-18 06:04:31,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.3142857142857145) internal successors, (162), 69 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:31,032 INFO L276 IsEmpty]: Start isEmpty. Operand 88382 states and 214934 transitions. [2022-01-18 06:04:31,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 06:04:31,479 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:04:31,479 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:04:31,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-01-18 06:04:31,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:31,685 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:04:31,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:04:31,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1468394253, now seen corresponding path program 70 times [2022-01-18 06:04:31,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:04:31,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108685413] [2022-01-18 06:04:31,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:04:31,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:04:31,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:04:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 81 proven. 152 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-18 06:04:31,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:04:31,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108685413] [2022-01-18 06:04:31,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108685413] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:04:31,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123905919] [2022-01-18 06:04:31,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:04:31,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:31,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:04:31,903 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:04:31,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 06:04:31,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:04:31,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:04:31,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-18 06:04:31,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:04:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 56 proven. 176 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-18 06:04:32,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:04:35,022 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 72 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:35,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123905919] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:04:35,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:04:35,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 24, 29] total 66 [2022-01-18 06:04:35,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059225405] [2022-01-18 06:04:35,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:04:35,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-18 06:04:35,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:04:35,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-18 06:04:35,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=3472, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 06:04:35,024 INFO L87 Difference]: Start difference. First operand 88382 states and 214934 transitions. Second operand has 67 states, 67 states have (on average 2.328358208955224) internal successors, (156), 66 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:58,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:04:58,676 INFO L93 Difference]: Finished difference Result 222793 states and 531143 transitions. [2022-01-18 06:04:58,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 279 states. [2022-01-18 06:04:58,676 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.328358208955224) internal successors, (156), 66 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 06:04:58,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:04:59,745 INFO L225 Difference]: With dead ends: 222793 [2022-01-18 06:04:59,745 INFO L226 Difference]: Without dead ends: 222270 [2022-01-18 06:04:59,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57237 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=31204, Invalid=84736, Unknown=0, NotChecked=0, Total=115940 [2022-01-18 06:04:59,756 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 1942 mSDsluCounter, 1435 mSDsCounter, 0 mSdLazyCounter, 3651 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1942 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 4195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 3651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:04:59,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1942 Valid, 812 Invalid, 4195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 3651 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-18 06:05:00,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222270 states. [2022-01-18 06:05:03,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222270 to 135294. [2022-01-18 06:05:03,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135294 states, 135293 states have (on average 2.426112215709608) internal successors, (328236), 135293 states have internal predecessors, (328236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:04,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135294 states to 135294 states and 328236 transitions. [2022-01-18 06:05:04,432 INFO L78 Accepts]: Start accepts. Automaton has 135294 states and 328236 transitions. Word has length 59 [2022-01-18 06:05:04,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:05:04,432 INFO L470 AbstractCegarLoop]: Abstraction has 135294 states and 328236 transitions. [2022-01-18 06:05:04,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.328358208955224) internal successors, (156), 66 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:04,432 INFO L276 IsEmpty]: Start isEmpty. Operand 135294 states and 328236 transitions. [2022-01-18 06:05:04,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 06:05:04,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:05:04,551 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:05:04,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-01-18 06:05:04,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:05:04,755 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:05:04,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:05:04,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1511239347, now seen corresponding path program 71 times [2022-01-18 06:05:04,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:05:04,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654280964] [2022-01-18 06:05:04,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:05:04,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:05:04,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:05:05,104 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 56 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 06:05:05,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:05:05,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654280964] [2022-01-18 06:05:05,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654280964] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:05:05,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789183060] [2022-01-18 06:05:05,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:05:05,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:05:05,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:05:05,105 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:05:05,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 06:05:05,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-01-18 06:05:05,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:05:05,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 53 conjunts are in the unsatisfiable core [2022-01-18 06:05:05,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:05:05,996 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 56 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:05,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:05:07,309 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 64 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:07,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789183060] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:05:07,310 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:05:07,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 28] total 75 [2022-01-18 06:05:07,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906230287] [2022-01-18 06:05:07,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:05:07,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-18 06:05:07,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:05:07,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-18 06:05:07,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=4803, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 06:05:07,311 INFO L87 Difference]: Start difference. First operand 135294 states and 328236 transitions. Second operand has 76 states, 76 states have (on average 2.1315789473684212) internal successors, (162), 75 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:16,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:05:16,160 INFO L93 Difference]: Finished difference Result 202243 states and 478613 transitions. [2022-01-18 06:05:16,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2022-01-18 06:05:16,161 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.1315789473684212) internal successors, (162), 75 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 06:05:16,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:05:16,723 INFO L225 Difference]: With dead ends: 202243 [2022-01-18 06:05:16,723 INFO L226 Difference]: Without dead ends: 200449 [2022-01-18 06:05:16,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38121 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=20669, Invalid=75121, Unknown=0, NotChecked=0, Total=95790 [2022-01-18 06:05:16,728 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1017 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 4082 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1017 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 4439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 4082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:05:16,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1017 Valid, 356 Invalid, 4439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 4082 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-18 06:05:16,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200449 states. [2022-01-18 06:05:20,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200449 to 114007. [2022-01-18 06:05:20,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114007 states, 114006 states have (on average 2.4131449221970773) internal successors, (275113), 114006 states have internal predecessors, (275113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:20,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114007 states to 114007 states and 275113 transitions. [2022-01-18 06:05:20,949 INFO L78 Accepts]: Start accepts. Automaton has 114007 states and 275113 transitions. Word has length 59 [2022-01-18 06:05:20,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:05:20,949 INFO L470 AbstractCegarLoop]: Abstraction has 114007 states and 275113 transitions. [2022-01-18 06:05:20,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.1315789473684212) internal successors, (162), 75 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:20,949 INFO L276 IsEmpty]: Start isEmpty. Operand 114007 states and 275113 transitions. [2022-01-18 06:05:21,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 06:05:21,034 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:05:21,034 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:05:21,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-01-18 06:05:21,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:05:21,245 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:05:21,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:05:21,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1565601971, now seen corresponding path program 72 times [2022-01-18 06:05:21,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:05:21,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711979661] [2022-01-18 06:05:21,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:05:21,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:05:21,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:05:21,546 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 72 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:21,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:05:21,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711979661] [2022-01-18 06:05:21,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711979661] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:05:21,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937562564] [2022-01-18 06:05:21,547 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:05:21,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:05:21,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:05:21,548 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:05:21,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 06:05:21,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-01-18 06:05:21,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:05:21,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 51 conjunts are in the unsatisfiable core [2022-01-18 06:05:21,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:05:22,320 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 72 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:22,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:05:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 81 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:23,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937562564] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:05:23,518 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:05:23,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 77 [2022-01-18 06:05:23,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60961998] [2022-01-18 06:05:23,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:05:23,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-18 06:05:23,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:05:23,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-18 06:05:23,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=968, Invalid=5038, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 06:05:23,519 INFO L87 Difference]: Start difference. First operand 114007 states and 275113 transitions. Second operand has 78 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 77 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:33,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:05:33,154 INFO L93 Difference]: Finished difference Result 152064 states and 360827 transitions. [2022-01-18 06:05:33,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2022-01-18 06:05:33,155 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 77 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 06:05:33,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:05:33,508 INFO L225 Difference]: With dead ends: 152064 [2022-01-18 06:05:33,508 INFO L226 Difference]: Without dead ends: 150510 [2022-01-18 06:05:33,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 328 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43255 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=23503, Invalid=85067, Unknown=0, NotChecked=0, Total=108570 [2022-01-18 06:05:33,512 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1294 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 3129 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1294 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 3484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 3129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:05:33,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1294 Valid, 390 Invalid, 3484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 3129 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 06:05:33,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150510 states. [2022-01-18 06:05:36,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150510 to 105815. [2022-01-18 06:05:36,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105815 states, 105814 states have (on average 2.402007295820969) internal successors, (254166), 105814 states have internal predecessors, (254166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:36,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105815 states to 105815 states and 254166 transitions. [2022-01-18 06:05:36,741 INFO L78 Accepts]: Start accepts. Automaton has 105815 states and 254166 transitions. Word has length 59 [2022-01-18 06:05:36,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:05:36,741 INFO L470 AbstractCegarLoop]: Abstraction has 105815 states and 254166 transitions. [2022-01-18 06:05:36,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 77 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:36,742 INFO L276 IsEmpty]: Start isEmpty. Operand 105815 states and 254166 transitions. [2022-01-18 06:05:36,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-18 06:05:36,815 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:05:36,815 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:05:36,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-01-18 06:05:37,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-01-18 06:05:37,029 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:05:37,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:05:37,029 INFO L85 PathProgramCache]: Analyzing trace with hash 218506875, now seen corresponding path program 73 times [2022-01-18 06:05:37,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:05:37,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448051244] [2022-01-18 06:05:37,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:05:37,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:05:37,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:05:37,389 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:37,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:05:37,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448051244] [2022-01-18 06:05:37,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448051244] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:05:37,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989406339] [2022-01-18 06:05:37,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:05:37,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:05:37,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:05:37,392 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:05:37,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 06:05:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:05:37,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-18 06:05:37,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:05:38,347 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:38,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:05:39,599 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 132 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:39,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989406339] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:05:39,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:05:39,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 28] total 78 [2022-01-18 06:05:39,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731145370] [2022-01-18 06:05:39,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:05:39,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-18 06:05:39,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:05:39,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-18 06:05:39,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1143, Invalid=5019, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 06:05:39,600 INFO L87 Difference]: Start difference. First operand 105815 states and 254166 transitions. Second operand has 79 states, 79 states have (on average 2.151898734177215) internal successors, (170), 78 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:50,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:05:50,054 INFO L93 Difference]: Finished difference Result 111709 states and 265887 transitions. [2022-01-18 06:05:50,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 278 states. [2022-01-18 06:05:50,054 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.151898734177215) internal successors, (170), 78 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-01-18 06:05:50,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:05:50,437 INFO L225 Difference]: With dead ends: 111709 [2022-01-18 06:05:50,437 INFO L226 Difference]: Without dead ends: 110518 [2022-01-18 06:05:50,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48991 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=30076, Invalid=93476, Unknown=0, NotChecked=0, Total=123552 [2022-01-18 06:05:50,441 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1303 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 2455 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1303 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 2673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 2455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:05:50,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1303 Valid, 361 Invalid, 2673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 2455 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 06:05:50,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110518 states. [2022-01-18 06:05:52,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110518 to 105662. [2022-01-18 06:05:52,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105662 states, 105661 states have (on average 2.401501026868949) internal successors, (253745), 105661 states have internal predecessors, (253745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:52,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105662 states to 105662 states and 253745 transitions. [2022-01-18 06:05:52,552 INFO L78 Accepts]: Start accepts. Automaton has 105662 states and 253745 transitions. Word has length 61 [2022-01-18 06:05:52,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:05:52,552 INFO L470 AbstractCegarLoop]: Abstraction has 105662 states and 253745 transitions. [2022-01-18 06:05:52,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.151898734177215) internal successors, (170), 78 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:52,552 INFO L276 IsEmpty]: Start isEmpty. Operand 105662 states and 253745 transitions. [2022-01-18 06:05:52,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-18 06:05:52,987 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:05:52,987 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:05:53,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-01-18 06:05:53,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:05:53,188 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:05:53,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:05:53,188 INFO L85 PathProgramCache]: Analyzing trace with hash 970555797, now seen corresponding path program 74 times [2022-01-18 06:05:53,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:05:53,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274131156] [2022-01-18 06:05:53,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:05:53,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:05:53,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:05:53,311 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:53,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:05:53,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274131156] [2022-01-18 06:05:53,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274131156] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:05:53,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683877792] [2022-01-18 06:05:53,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:05:53,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:05:53,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:05:53,312 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:05:53,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 06:05:53,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:05:53,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:05:53,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 06:05:53,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:05:53,896 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:53,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:05:54,820 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:54,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683877792] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:05:54,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:05:54,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 28, 27] total 65 [2022-01-18 06:05:54,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927697291] [2022-01-18 06:05:54,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:05:54,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-18 06:05:54,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:05:54,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-18 06:05:54,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=3265, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 06:05:54,821 INFO L87 Difference]: Start difference. First operand 105662 states and 253745 transitions. Second operand has 66 states, 66 states have (on average 2.4545454545454546) internal successors, (162), 65 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:00,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:06:00,450 INFO L93 Difference]: Finished difference Result 108123 states and 258768 transitions. [2022-01-18 06:06:00,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2022-01-18 06:06:00,450 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.4545454545454546) internal successors, (162), 65 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have 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 [2022-01-18 06:06:00,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:06:00,660 INFO L225 Difference]: With dead ends: 108123 [2022-01-18 06:06:00,661 INFO L226 Difference]: Without dead ends: 108119 [2022-01-18 06:06:00,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25401 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=17508, Invalid=49832, Unknown=0, NotChecked=0, Total=67340 [2022-01-18 06:06:00,664 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 461 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 1716 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:06:00,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 177 Invalid, 1815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1716 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 06:06:00,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108119 states. [2022-01-18 06:06:02,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108119 to 105530. [2022-01-18 06:06:02,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105530 states, 105529 states have (on average 2.4019748126107516) internal successors, (253478), 105529 states have internal predecessors, (253478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:03,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105530 states to 105530 states and 253478 transitions. [2022-01-18 06:06:03,059 INFO L78 Accepts]: Start accepts. Automaton has 105530 states and 253478 transitions. Word has length 61 [2022-01-18 06:06:03,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:06:03,059 INFO L470 AbstractCegarLoop]: Abstraction has 105530 states and 253478 transitions. [2022-01-18 06:06:03,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.4545454545454546) internal successors, (162), 65 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:03,059 INFO L276 IsEmpty]: Start isEmpty. Operand 105530 states and 253478 transitions. [2022-01-18 06:06:03,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-18 06:06:03,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:06:03,141 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:06:03,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-01-18 06:06:03,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:06:03,348 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:06:03,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:06:03,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1163558027, now seen corresponding path program 75 times [2022-01-18 06:06:03,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:06:03,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107468062] [2022-01-18 06:06:03,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:06:03,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:06:03,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:06:03,569 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 99 proven. 155 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-18 06:06:03,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:06:03,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107468062] [2022-01-18 06:06:03,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107468062] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:06:03,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556683444] [2022-01-18 06:06:03,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:06:03,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:06:03,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:06:03,588 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:06:03,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 06:06:03,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-18 06:06:03,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:06:03,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-18 06:06:03,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:06:04,773 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 56 proven. 207 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:06:04,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:06:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 72 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:06,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556683444] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:06:06,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:06:06,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27, 30] total 73 [2022-01-18 06:06:06,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117301982] [2022-01-18 06:06:06,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:06:06,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-18 06:06:06,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:06:06,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-18 06:06:06,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=971, Invalid=4431, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 06:06:06,376 INFO L87 Difference]: Start difference. First operand 105530 states and 253478 transitions. Second operand has 74 states, 74 states have (on average 2.2162162162162162) internal successors, (164), 73 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:19,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:06:19,241 INFO L93 Difference]: Finished difference Result 236823 states and 557165 transitions. [2022-01-18 06:06:19,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 247 states. [2022-01-18 06:06:19,242 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.2162162162162162) internal successors, (164), 73 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-01-18 06:06:19,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:06:19,913 INFO L225 Difference]: With dead ends: 236823 [2022-01-18 06:06:19,914 INFO L226 Difference]: Without dead ends: 236370 [2022-01-18 06:06:19,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42883 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=23732, Invalid=75808, Unknown=0, NotChecked=0, Total=99540 [2022-01-18 06:06:19,917 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1497 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 3389 mSolverCounterSat, 551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1497 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 3940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 3389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:06:19,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1497 Valid, 434 Invalid, 3940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [551 Valid, 3389 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 06:06:20,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236370 states. [2022-01-18 06:06:23,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236370 to 106779. [2022-01-18 06:06:24,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106779 states, 106778 states have (on average 2.4088576298488453) internal successors, (257213), 106778 states have internal predecessors, (257213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:24,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106779 states to 106779 states and 257213 transitions. [2022-01-18 06:06:24,635 INFO L78 Accepts]: Start accepts. Automaton has 106779 states and 257213 transitions. Word has length 61 [2022-01-18 06:06:24,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:06:24,635 INFO L470 AbstractCegarLoop]: Abstraction has 106779 states and 257213 transitions. [2022-01-18 06:06:24,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.2162162162162162) internal successors, (164), 73 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:24,635 INFO L276 IsEmpty]: Start isEmpty. Operand 106779 states and 257213 transitions. [2022-01-18 06:06:24,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-18 06:06:24,724 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:06:24,724 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:06:24,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-01-18 06:06:24,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-01-18 06:06:24,941 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:06:24,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:06:24,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1391515015, now seen corresponding path program 76 times [2022-01-18 06:06:24,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:06:24,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759279874] [2022-01-18 06:06:24,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:06:24,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:06:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:06:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:25,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:06:25,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759279874] [2022-01-18 06:06:25,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759279874] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:06:25,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099009396] [2022-01-18 06:06:25,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:06:25,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:06:25,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:06:25,143 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:06:25,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 06:06:25,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:06:25,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:06:25,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 51 conjunts are in the unsatisfiable core [2022-01-18 06:06:25,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:06:25,301 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:25,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:06:26,142 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:26,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099009396] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:06:26,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:06:26,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 27] total 39 [2022-01-18 06:06:26,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68714314] [2022-01-18 06:06:26,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:06:26,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-18 06:06:26,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:06:26,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-18 06:06:26,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1107, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 06:06:26,143 INFO L87 Difference]: Start difference. First operand 106779 states and 257213 transitions. Second operand has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 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) [2022-01-18 06:06:27,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:06:27,274 INFO L93 Difference]: Finished difference Result 126411 states and 307272 transitions. [2022-01-18 06:06:27,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 06:06:27,275 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 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 63 [2022-01-18 06:06:27,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:06:27,626 INFO L225 Difference]: With dead ends: 126411 [2022-01-18 06:06:27,627 INFO L226 Difference]: Without dead ends: 126324 [2022-01-18 06:06:27,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=375, Invalid=1107, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 06:06:27,627 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 545 mSDsluCounter, 1877 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 1414 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:06:27,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 1414 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:06:27,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126324 states. [2022-01-18 06:06:30,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126324 to 125700. [2022-01-18 06:06:30,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125700 states, 125699 states have (on average 2.4344028194337266) internal successors, (306002), 125699 states have internal predecessors, (306002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:06:31,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125700 states to 125700 states and 306002 transitions. [2022-01-18 06:06:31,085 INFO L78 Accepts]: Start accepts. Automaton has 125700 states and 306002 transitions. Word has length 63 [2022-01-18 06:06:31,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:06:31,085 INFO L470 AbstractCegarLoop]: Abstraction has 125700 states and 306002 transitions. [2022-01-18 06:06:31,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 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) [2022-01-18 06:06:31,085 INFO L276 IsEmpty]: Start isEmpty. Operand 125700 states and 306002 transitions. [2022-01-18 06:06:31,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-18 06:06:31,192 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:06:31,192 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:06:31,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-01-18 06:06:31,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-01-18 06:06:31,397 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:06:31,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:06:31,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1351434417, now seen corresponding path program 77 times [2022-01-18 06:06:31,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:06:31,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688607075] [2022-01-18 06:06:31,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:06:31,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:06:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:06:31,890 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:31,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:06:31,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688607075] [2022-01-18 06:06:31,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688607075] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:06:31,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426058091] [2022-01-18 06:06:31,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:06:31,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:06:31,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:06:31,892 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:06:31,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 06:06:31,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-01-18 06:06:31,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:06:31,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 73 conjunts are in the unsatisfiable core [2022-01-18 06:06:31,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:06:33,023 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:33,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:06:40,448 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:06:40,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426058091] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:06:40,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:06:40,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 30, 30] total 74 [2022-01-18 06:06:40,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839622868] [2022-01-18 06:06:40,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:06:40,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-18 06:06:40,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:06:40,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-18 06:06:40,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1158, Invalid=4392, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 06:06:40,450 INFO L87 Difference]: Start difference. First operand 125700 states and 306002 transitions. Second operand has 75 states, 75 states have (on average 2.36) internal successors, (177), 74 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:19,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:07:19,360 INFO L93 Difference]: Finished difference Result 217963 states and 521265 transitions. [2022-01-18 06:07:19,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2022-01-18 06:07:19,361 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.36) internal successors, (177), 74 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-18 06:07:19,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:07:20,227 INFO L225 Difference]: With dead ends: 217963 [2022-01-18 06:07:20,228 INFO L226 Difference]: Without dead ends: 217918 [2022-01-18 06:07:20,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34219 ImplicationChecksByTransitivity, 35.1s TimeCoverageRelationStatistics Valid=16938, Invalid=70974, Unknown=0, NotChecked=0, Total=87912 [2022-01-18 06:07:20,230 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 2659 mSDsluCounter, 4445 mSDsCounter, 0 mSdLazyCounter, 15011 mSolverCounterSat, 1190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2659 SdHoareTripleChecker+Valid, 2387 SdHoareTripleChecker+Invalid, 16201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1190 IncrementalHoareTripleChecker+Valid, 15011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:07:20,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2659 Valid, 2387 Invalid, 16201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1190 Valid, 15011 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-01-18 06:07:20,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217918 states. [2022-01-18 06:07:23,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217918 to 155024. [2022-01-18 06:07:23,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155024 states, 155023 states have (on average 2.4420956890267895) internal successors, (378581), 155023 states have internal predecessors, (378581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:24,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155024 states to 155024 states and 378581 transitions. [2022-01-18 06:07:24,772 INFO L78 Accepts]: Start accepts. Automaton has 155024 states and 378581 transitions. Word has length 63 [2022-01-18 06:07:24,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:07:24,772 INFO L470 AbstractCegarLoop]: Abstraction has 155024 states and 378581 transitions. [2022-01-18 06:07:24,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.36) internal successors, (177), 74 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:24,772 INFO L276 IsEmpty]: Start isEmpty. Operand 155024 states and 378581 transitions. [2022-01-18 06:07:24,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-18 06:07:24,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:07:24,889 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:07:24,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-01-18 06:07:25,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:07:25,108 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:07:25,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:07:25,109 INFO L85 PathProgramCache]: Analyzing trace with hash -2081800327, now seen corresponding path program 78 times [2022-01-18 06:07:25,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:07:25,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153468145] [2022-01-18 06:07:25,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:07:25,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:07:25,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:07:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 23 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:25,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:07:25,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153468145] [2022-01-18 06:07:25,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153468145] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:07:25,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942398175] [2022-01-18 06:07:25,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:07:25,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:07:25,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:07:25,469 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:07:25,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 06:07:25,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-01-18 06:07:25,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:07:25,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 70 conjunts are in the unsatisfiable core [2022-01-18 06:07:25,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:07:26,249 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 23 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:26,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:07:32,390 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 34 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:07:32,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942398175] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:07:32,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:07:32,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 30, 30] total 73 [2022-01-18 06:07:32,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663892570] [2022-01-18 06:07:32,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:07:32,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-18 06:07:32,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:07:32,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-18 06:07:32,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1270, Invalid=4132, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 06:07:32,392 INFO L87 Difference]: Start difference. First operand 155024 states and 378581 transitions. Second operand has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 73 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:07:59,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:07:59,098 INFO L93 Difference]: Finished difference Result 177105 states and 432929 transitions. [2022-01-18 06:07:59,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2022-01-18 06:07:59,098 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 73 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-18 06:07:59,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:07:59,768 INFO L225 Difference]: With dead ends: 177105 [2022-01-18 06:07:59,769 INFO L226 Difference]: Without dead ends: 177081 [2022-01-18 06:07:59,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21664 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=13703, Invalid=44619, Unknown=0, NotChecked=0, Total=58322 [2022-01-18 06:07:59,783 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 1719 mSDsluCounter, 2040 mSDsCounter, 0 mSdLazyCounter, 9447 mSolverCounterSat, 833 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1719 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 10280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 833 IncrementalHoareTripleChecker+Valid, 9447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:07:59,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1719 Valid, 992 Invalid, 10280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [833 Valid, 9447 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-01-18 06:07:59,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177081 states. [2022-01-18 06:08:02,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177081 to 135562. [2022-01-18 06:08:03,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135562 states, 135561 states have (on average 2.4290467022226157) internal successors, (329284), 135561 states have internal predecessors, (329284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:03,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135562 states to 135562 states and 329284 transitions. [2022-01-18 06:08:03,471 INFO L78 Accepts]: Start accepts. Automaton has 135562 states and 329284 transitions. Word has length 63 [2022-01-18 06:08:03,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:08:03,471 INFO L470 AbstractCegarLoop]: Abstraction has 135562 states and 329284 transitions. [2022-01-18 06:08:03,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 73 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:03,472 INFO L276 IsEmpty]: Start isEmpty. Operand 135562 states and 329284 transitions. [2022-01-18 06:08:03,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-18 06:08:03,569 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:08:03,569 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:08:03,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-01-18 06:08:03,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:08:03,780 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:08:03,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:08:03,780 INFO L85 PathProgramCache]: Analyzing trace with hash 2077265363, now seen corresponding path program 79 times [2022-01-18 06:08:03,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:08:03,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517139579] [2022-01-18 06:08:03,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:08:03,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:08:03,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:08:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 2 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:04,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:08:04,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517139579] [2022-01-18 06:08:04,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517139579] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:08:04,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468409065] [2022-01-18 06:08:04,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:08:04,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:08:04,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:08:04,136 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:08:04,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 06:08:04,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:08:04,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 70 conjunts are in the unsatisfiable core [2022-01-18 06:08:04,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:08:05,646 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 2 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:05,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:08:11,175 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 6 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:08:11,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468409065] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:08:11,175 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:08:11,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 29, 31] total 76 [2022-01-18 06:08:11,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675228279] [2022-01-18 06:08:11,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:08:11,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-18 06:08:11,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:08:11,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-18 06:08:11,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1110, Invalid=4742, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 06:08:11,176 INFO L87 Difference]: Start difference. First operand 135562 states and 329284 transitions. Second operand has 77 states, 77 states have (on average 2.311688311688312) internal successors, (178), 76 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:08:58,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:08:58,414 INFO L93 Difference]: Finished difference Result 245356 states and 584194 transitions. [2022-01-18 06:08:58,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 304 states. [2022-01-18 06:08:58,415 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.311688311688312) internal successors, (178), 76 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-18 06:08:58,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:08:59,423 INFO L225 Difference]: With dead ends: 245356 [2022-01-18 06:08:59,424 INFO L226 Difference]: Without dead ends: 245275 [2022-01-18 06:08:59,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 374 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57436 ImplicationChecksByTransitivity, 43.1s TimeCoverageRelationStatistics Valid=26282, Invalid=114718, Unknown=0, NotChecked=0, Total=141000 [2022-01-18 06:08:59,431 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 2778 mSDsluCounter, 2574 mSDsCounter, 0 mSdLazyCounter, 12091 mSolverCounterSat, 1307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2778 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 13398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1307 IncrementalHoareTripleChecker+Valid, 12091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:08:59,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2778 Valid, 1285 Invalid, 13398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1307 Valid, 12091 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-01-18 06:09:00,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245275 states. [2022-01-18 06:09:04,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245275 to 146308. [2022-01-18 06:09:04,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146308 states, 146307 states have (on average 2.4305603969734872) internal successors, (355608), 146307 states have internal predecessors, (355608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:05,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146308 states to 146308 states and 355608 transitions. [2022-01-18 06:09:05,338 INFO L78 Accepts]: Start accepts. Automaton has 146308 states and 355608 transitions. Word has length 63 [2022-01-18 06:09:05,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:09:05,338 INFO L470 AbstractCegarLoop]: Abstraction has 146308 states and 355608 transitions. [2022-01-18 06:09:05,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.311688311688312) internal successors, (178), 76 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:05,338 INFO L276 IsEmpty]: Start isEmpty. Operand 146308 states and 355608 transitions. [2022-01-18 06:09:05,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-18 06:09:05,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:05,449 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:09:05,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-01-18 06:09:05,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:05,660 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:09:05,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:05,661 INFO L85 PathProgramCache]: Analyzing trace with hash 196528471, now seen corresponding path program 80 times [2022-01-18 06:09:05,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:05,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198049759] [2022-01-18 06:09:05,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:05,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:05,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:06,037 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 6 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:06,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:06,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198049759] [2022-01-18 06:09:06,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198049759] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:09:06,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741753478] [2022-01-18 06:09:06,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:09:06,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:06,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:09:06,039 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:09:06,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-18 06:09:06,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:09:06,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:09:06,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 64 conjunts are in the unsatisfiable core [2022-01-18 06:09:06,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:09:06,993 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 6 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:06,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:09:11,422 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 12 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:11,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741753478] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:09:11,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:09:11,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 29, 30] total 75 [2022-01-18 06:09:11,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077070106] [2022-01-18 06:09:11,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:09:11,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-18 06:09:11,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:11,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-18 06:09:11,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=4673, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 06:09:11,423 INFO L87 Difference]: Start difference. First operand 146308 states and 355608 transitions. Second operand has 76 states, 76 states have (on average 2.289473684210526) internal successors, (174), 75 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:59,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:09:59,410 INFO L93 Difference]: Finished difference Result 300349 states and 716115 transitions. [2022-01-18 06:09:59,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 366 states. [2022-01-18 06:09:59,410 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.289473684210526) internal successors, (174), 75 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-18 06:09:59,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:10:00,728 INFO L225 Difference]: With dead ends: 300349 [2022-01-18 06:10:00,729 INFO L226 Difference]: Without dead ends: 300199 [2022-01-18 06:10:00,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 435 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81751 ImplicationChecksByTransitivity, 41.8s TimeCoverageRelationStatistics Valid=35722, Invalid=154810, Unknown=0, NotChecked=0, Total=190532 [2022-01-18 06:10:00,738 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 2089 mSDsluCounter, 2550 mSDsCounter, 0 mSdLazyCounter, 12739 mSolverCounterSat, 1136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2089 SdHoareTripleChecker+Valid, 1251 SdHoareTripleChecker+Invalid, 13875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1136 IncrementalHoareTripleChecker+Valid, 12739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:10:00,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2089 Valid, 1251 Invalid, 13875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1136 Valid, 12739 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-01-18 06:10:01,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300199 states. [2022-01-18 06:10:06,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300199 to 179828. [2022-01-18 06:10:06,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179828 states, 179827 states have (on average 2.44969887725425) internal successors, (440522), 179827 states have internal predecessors, (440522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:08,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179828 states to 179828 states and 440522 transitions. [2022-01-18 06:10:08,077 INFO L78 Accepts]: Start accepts. Automaton has 179828 states and 440522 transitions. Word has length 63 [2022-01-18 06:10:08,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:10:08,077 INFO L470 AbstractCegarLoop]: Abstraction has 179828 states and 440522 transitions. [2022-01-18 06:10:08,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.289473684210526) internal successors, (174), 75 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:08,077 INFO L276 IsEmpty]: Start isEmpty. Operand 179828 states and 440522 transitions. [2022-01-18 06:10:08,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-18 06:10:08,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:10:08,244 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:10:08,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-01-18 06:10:08,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:08,467 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:10:08,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:10:08,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1702662933, now seen corresponding path program 81 times [2022-01-18 06:10:08,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:10:08,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310051034] [2022-01-18 06:10:08,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:10:08,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:10:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:10:08,750 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 56 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:08,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:10:08,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310051034] [2022-01-18 06:10:08,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310051034] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:10:08,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092610908] [2022-01-18 06:10:08,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:10:08,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:08,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:10:08,751 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:10:08,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-18 06:10:08,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-01-18 06:10:08,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:10:08,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 53 conjunts are in the unsatisfiable core [2022-01-18 06:10:08,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:10:09,855 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 56 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:09,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:10:12,206 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 56 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:12,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092610908] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:10:12,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:10:12,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 32] total 84 [2022-01-18 06:10:12,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234163164] [2022-01-18 06:10:12,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:10:12,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-18 06:10:12,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:10:12,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-18 06:10:12,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1109, Invalid=6031, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 06:10:12,208 INFO L87 Difference]: Start difference. First operand 179828 states and 440522 transitions. Second operand has 85 states, 85 states have (on average 2.1294117647058823) internal successors, (181), 84 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:30,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:10:30,155 INFO L93 Difference]: Finished difference Result 347480 states and 835381 transitions. [2022-01-18 06:10:30,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 299 states. [2022-01-18 06:10:30,156 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.1294117647058823) internal successors, (181), 84 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-18 06:10:30,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. Received shutdown request... [2022-01-18 06:10:30,834 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 06:10:30,834 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 06:10:31,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2022-01-18 06:10:31,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-01-18 06:10:32,391 INFO L225 Difference]: With dead ends: 347480 [2022-01-18 06:10:32,392 INFO L226 Difference]: Without dead ends: 345479 [2022-01-18 06:10:32,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 377 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58997 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=31446, Invalid=111816, Unknown=0, NotChecked=0, Total=143262 [2022-01-18 06:10:32,398 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1647 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 4796 mSolverCounterSat, 716 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1647 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 5512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 716 IncrementalHoareTripleChecker+Valid, 4796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:10:32,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1647 Valid, 489 Invalid, 5512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [716 Valid, 4796 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-18 06:10:32,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345479 states. [2022-01-18 06:10:32,846 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-01-18 06:10:32,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-18 06:10:32,847 WARN L594 AbstractCegarLoop]: Verification canceled: while executing MinimizeSevpa. [2022-01-18 06:10:32,848 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-18 06:10:32,848 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-18 06:10:32,851 INFO L732 BasicCegarLoop]: Path program histogram: [81, 1, 1] [2022-01-18 06:10:32,852 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 06:10:32,852 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 06:10:32,854 INFO L202 PluginConnector]: Adding new model nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 06:10:32 BasicIcfg [2022-01-18 06:10:32,854 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 06:10:32,854 INFO L158 Benchmark]: Toolchain (without parser) took 867142.54ms. Allocated memory was 408.9MB in the beginning and 12.6GB in the end (delta: 12.2GB). Free memory was 366.0MB in the beginning and 11.1GB in the end (delta: -10.7GB). Peak memory consumption was 6.3GB. Max. memory is 16.0GB. [2022-01-18 06:10:32,854 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.16ms. Allocated memory is still 408.9MB. Free memory is still 367.0MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 06:10:32,854 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.94ms. Allocated memory is still 408.9MB. Free memory was 365.9MB in the beginning and 364.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 06:10:32,854 INFO L158 Benchmark]: Boogie Preprocessor took 13.87ms. Allocated memory is still 408.9MB. Free memory was 364.4MB in the beginning and 363.6MB in the end (delta: 883.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 06:10:32,854 INFO L158 Benchmark]: RCFGBuilder took 185.95ms. Allocated memory is still 408.9MB. Free memory was 363.4MB in the beginning and 354.4MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2022-01-18 06:10:32,854 INFO L158 Benchmark]: TraceAbstraction took 866880.66ms. Allocated memory was 408.9MB in the beginning and 12.6GB in the end (delta: 12.2GB). Free memory was 354.0MB in the beginning and 11.1GB in the end (delta: -10.8GB). Peak memory consumption was 6.3GB. Max. memory is 16.0GB. [2022-01-18 06:10:32,855 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.16ms. Allocated memory is still 408.9MB. Free memory is still 367.0MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 57.94ms. Allocated memory is still 408.9MB. Free memory was 365.9MB in the beginning and 364.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 13.87ms. Allocated memory is still 408.9MB. Free memory was 364.4MB in the beginning and 363.6MB in the end (delta: 883.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 185.95ms. Allocated memory is still 408.9MB. Free memory was 363.4MB in the beginning and 354.4MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * TraceAbstraction took 866880.66ms. Allocated memory was 408.9MB in the beginning and 12.6GB in the end (delta: 12.2GB). Free memory was 354.0MB in the beginning and 11.1GB in the end (delta: -10.8GB). Peak memory consumption was 6.3GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 866.8s, OverallIterations: 83, TraceHistogramMax: 12, PathProgramHistogramMax: 81, EmptinessCheckTime: 3.2s, AutomataDifference: 616.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 63807 SdHoareTripleChecker+Valid, 85.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 63807 mSDsluCounter, 36593 SdHoareTripleChecker+Invalid, 72.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 66585 mSDsCounter, 23612 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 204889 IncrementalHoareTripleChecker+Invalid, 228501 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 23612 mSolverCounterUnsat, 2272 mSDtfsCounter, 204889 mSolverCounterSat, 0.5s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 18404 GetRequests, 4771 SyntacticMatches, 117 SemanticMatches, 13516 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1339255 ImplicationChecksByTransitivity, 535.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=179828occurred in iteration=82, InterpolantAutomatonStates: 10340, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 73.0s AutomataMinimizationTime, 83 MinimizatonAttempts, 1263450 StatesRemovedByMinimization, 82 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 152.9s InterpolantComputationTime, 7166 NumberOfCodeBlocks, 7166 NumberOfCodeBlocksAsserted, 523 NumberOfCheckSat, 10488 ConstructedInterpolants, 0 QuantifiedInterpolants, 156721 SizeOfPredicates, 604 NumberOfNonLiveVariables, 8229 ConjunctsInSsa, 2902 ConjunctsInUnsatCore, 245 InterpolantComputations, 2 PerfectInterpolantSequences, 7972/30895 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown